wps_registrar.c revision 4b06059785b935dd1f4f09314e4e12c417d2c6a4
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 * 2 + 1]; 36 size_t dev_pw_len; 37}; 38 39 40static void wps_remove_nfc_pw_token(struct wps_nfc_pw_token *token) 41{ 42 dl_list_del(&token->list); 43 os_free(token); 44} 45 46 47static void wps_free_nfc_pw_tokens(struct dl_list *tokens, u16 pw_id) 48{ 49 struct wps_nfc_pw_token *token, *prev; 50 dl_list_for_each_safe(token, prev, tokens, struct wps_nfc_pw_token, 51 list) { 52 if (pw_id == 0 || pw_id == token->pw_id) 53 wps_remove_nfc_pw_token(token); 54 } 55} 56 57 58static struct wps_nfc_pw_token * wps_get_nfc_pw_token(struct dl_list *tokens, 59 u16 pw_id) 60{ 61 struct wps_nfc_pw_token *token; 62 dl_list_for_each(token, tokens, struct wps_nfc_pw_token, list) { 63 if (pw_id == token->pw_id) 64 return token; 65 } 66 return NULL; 67} 68 69#else /* CONFIG_WPS_NFC */ 70 71#define wps_free_nfc_pw_tokens(t, p) do { } while (0) 72 73#endif /* CONFIG_WPS_NFC */ 74 75 76struct wps_uuid_pin { 77 struct dl_list list; 78 u8 uuid[WPS_UUID_LEN]; 79 int wildcard_uuid; 80 u8 *pin; 81 size_t pin_len; 82#define PIN_LOCKED BIT(0) 83#define PIN_EXPIRES BIT(1) 84 int flags; 85 struct os_time expiration; 86 u8 enrollee_addr[ETH_ALEN]; 87}; 88 89 90static void wps_free_pin(struct wps_uuid_pin *pin) 91{ 92 os_free(pin->pin); 93 os_free(pin); 94} 95 96 97static void wps_remove_pin(struct wps_uuid_pin *pin) 98{ 99 dl_list_del(&pin->list); 100 wps_free_pin(pin); 101} 102 103 104static void wps_free_pins(struct dl_list *pins) 105{ 106 struct wps_uuid_pin *pin, *prev; 107 dl_list_for_each_safe(pin, prev, pins, struct wps_uuid_pin, list) 108 wps_remove_pin(pin); 109} 110 111 112struct wps_pbc_session { 113 struct wps_pbc_session *next; 114 u8 addr[ETH_ALEN]; 115 u8 uuid_e[WPS_UUID_LEN]; 116 struct os_time timestamp; 117}; 118 119 120static void wps_free_pbc_sessions(struct wps_pbc_session *pbc) 121{ 122 struct wps_pbc_session *prev; 123 124 while (pbc) { 125 prev = pbc; 126 pbc = pbc->next; 127 os_free(prev); 128 } 129} 130 131 132struct wps_registrar_device { 133 struct wps_registrar_device *next; 134 struct wps_device_data dev; 135 u8 uuid[WPS_UUID_LEN]; 136}; 137 138 139struct wps_registrar { 140 struct wps_context *wps; 141 142 int pbc; 143 int selected_registrar; 144 145 int (*new_psk_cb)(void *ctx, const u8 *mac_addr, const u8 *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, 0); 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, 0); 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, 0); 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, 0); 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, 0); 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_credential(struct wpabuf *msg, 1535 const struct wps_credential *cred) 1536{ 1537 if (wps_build_cred_network_idx(msg, cred) || 1538 wps_build_cred_ssid(msg, cred) || 1539 wps_build_cred_auth_type(msg, cred) || 1540 wps_build_cred_encr_type(msg, cred) || 1541 wps_build_cred_network_key(msg, cred) || 1542 wps_build_mac_addr(msg, cred->mac_addr)) 1543 return -1; 1544 return 0; 1545} 1546 1547 1548int wps_build_credential_wrap(struct wpabuf *msg, 1549 const struct wps_credential *cred) 1550{ 1551 struct wpabuf *wbuf; 1552 wbuf = wpabuf_alloc(200); 1553 if (wbuf == NULL) 1554 return -1; 1555 if (wps_build_credential(wbuf, cred)) { 1556 wpabuf_free(wbuf); 1557 return -1; 1558 } 1559 wpabuf_put_be16(msg, ATTR_CRED); 1560 wpabuf_put_be16(msg, wpabuf_len(wbuf)); 1561 wpabuf_put_buf(msg, wbuf); 1562 wpabuf_free(wbuf); 1563 return 0; 1564} 1565 1566 1567int wps_build_cred(struct wps_data *wps, struct wpabuf *msg) 1568{ 1569 struct wpabuf *cred; 1570 1571 if (wps->wps->registrar->skip_cred_build) 1572 goto skip_cred_build; 1573 1574 wpa_printf(MSG_DEBUG, "WPS: * Credential"); 1575 if (wps->use_cred) { 1576 os_memcpy(&wps->cred, wps->use_cred, sizeof(wps->cred)); 1577 goto use_provided; 1578 } 1579 os_memset(&wps->cred, 0, sizeof(wps->cred)); 1580 1581 os_memcpy(wps->cred.ssid, wps->wps->ssid, wps->wps->ssid_len); 1582 wps->cred.ssid_len = wps->wps->ssid_len; 1583 1584 /* Select the best authentication and encryption type */ 1585 if (wps->auth_type & WPS_AUTH_WPA2PSK) 1586 wps->auth_type = WPS_AUTH_WPA2PSK; 1587 else if (wps->auth_type & WPS_AUTH_WPAPSK) 1588 wps->auth_type = WPS_AUTH_WPAPSK; 1589 else if (wps->auth_type & WPS_AUTH_OPEN) 1590 wps->auth_type = WPS_AUTH_OPEN; 1591 else if (wps->auth_type & WPS_AUTH_SHARED) 1592 wps->auth_type = WPS_AUTH_SHARED; 1593 else { 1594 wpa_printf(MSG_DEBUG, "WPS: Unsupported auth_type 0x%x", 1595 wps->auth_type); 1596 return -1; 1597 } 1598 wps->cred.auth_type = wps->auth_type; 1599 1600 if (wps->auth_type == WPS_AUTH_WPA2PSK || 1601 wps->auth_type == WPS_AUTH_WPAPSK) { 1602 if (wps->encr_type & WPS_ENCR_AES) 1603 wps->encr_type = WPS_ENCR_AES; 1604 else if (wps->encr_type & WPS_ENCR_TKIP) 1605 wps->encr_type = WPS_ENCR_TKIP; 1606 else { 1607 wpa_printf(MSG_DEBUG, "WPS: No suitable encryption " 1608 "type for WPA/WPA2"); 1609 return -1; 1610 } 1611 } else { 1612 if (wps->encr_type & WPS_ENCR_WEP) 1613 wps->encr_type = WPS_ENCR_WEP; 1614 else if (wps->encr_type & WPS_ENCR_NONE) 1615 wps->encr_type = WPS_ENCR_NONE; 1616 else { 1617 wpa_printf(MSG_DEBUG, "WPS: No suitable encryption " 1618 "type for non-WPA/WPA2 mode"); 1619 return -1; 1620 } 1621 } 1622 wps->cred.encr_type = wps->encr_type; 1623 /* 1624 * Set MAC address in the Credential to be the Enrollee's MAC address 1625 */ 1626 os_memcpy(wps->cred.mac_addr, wps->mac_addr_e, ETH_ALEN); 1627 1628 if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->wps->ap && 1629 !wps->wps->registrar->disable_auto_conf) { 1630 u8 r[16]; 1631 /* Generate a random passphrase */ 1632 if (random_get_bytes(r, sizeof(r)) < 0) 1633 return -1; 1634 os_free(wps->new_psk); 1635 wps->new_psk = base64_encode(r, sizeof(r), &wps->new_psk_len); 1636 if (wps->new_psk == NULL) 1637 return -1; 1638 wps->new_psk_len--; /* remove newline */ 1639 while (wps->new_psk_len && 1640 wps->new_psk[wps->new_psk_len - 1] == '=') 1641 wps->new_psk_len--; 1642 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: Generated passphrase", 1643 wps->new_psk, wps->new_psk_len); 1644 os_memcpy(wps->cred.key, wps->new_psk, wps->new_psk_len); 1645 wps->cred.key_len = wps->new_psk_len; 1646 } else if (wps->use_psk_key && wps->wps->psk_set) { 1647 char hex[65]; 1648 wpa_printf(MSG_DEBUG, "WPS: Use PSK format for Network Key"); 1649 wpa_snprintf_hex(hex, sizeof(hex), wps->wps->psk, 32); 1650 os_memcpy(wps->cred.key, hex, 32 * 2); 1651 wps->cred.key_len = 32 * 2; 1652 } else if (wps->wps->network_key) { 1653 os_memcpy(wps->cred.key, wps->wps->network_key, 1654 wps->wps->network_key_len); 1655 wps->cred.key_len = wps->wps->network_key_len; 1656 } else if (wps->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) { 1657 char hex[65]; 1658 /* Generate a random per-device PSK */ 1659 os_free(wps->new_psk); 1660 wps->new_psk_len = 32; 1661 wps->new_psk = os_malloc(wps->new_psk_len); 1662 if (wps->new_psk == NULL) 1663 return -1; 1664 if (random_get_bytes(wps->new_psk, wps->new_psk_len) < 0) { 1665 os_free(wps->new_psk); 1666 wps->new_psk = NULL; 1667 return -1; 1668 } 1669 wpa_hexdump_key(MSG_DEBUG, "WPS: Generated per-device PSK", 1670 wps->new_psk, wps->new_psk_len); 1671 wpa_snprintf_hex(hex, sizeof(hex), wps->new_psk, 1672 wps->new_psk_len); 1673 os_memcpy(wps->cred.key, hex, wps->new_psk_len * 2); 1674 wps->cred.key_len = wps->new_psk_len * 2; 1675 } 1676 1677use_provided: 1678#ifdef CONFIG_WPS_TESTING 1679 if (wps_testing_dummy_cred) 1680 cred = wpabuf_alloc(200); 1681 else 1682 cred = NULL; 1683 if (cred) { 1684 struct wps_credential dummy; 1685 wpa_printf(MSG_DEBUG, "WPS: Add dummy credential"); 1686 os_memset(&dummy, 0, sizeof(dummy)); 1687 os_memcpy(dummy.ssid, "dummy", 5); 1688 dummy.ssid_len = 5; 1689 dummy.auth_type = WPS_AUTH_WPA2PSK; 1690 dummy.encr_type = WPS_ENCR_AES; 1691 os_memcpy(dummy.key, "dummy psk", 9); 1692 dummy.key_len = 9; 1693 os_memcpy(dummy.mac_addr, wps->mac_addr_e, ETH_ALEN); 1694 wps_build_credential(cred, &dummy); 1695 wpa_hexdump_buf(MSG_DEBUG, "WPS: Dummy Credential", cred); 1696 1697 wpabuf_put_be16(msg, ATTR_CRED); 1698 wpabuf_put_be16(msg, wpabuf_len(cred)); 1699 wpabuf_put_buf(msg, cred); 1700 1701 wpabuf_free(cred); 1702 } 1703#endif /* CONFIG_WPS_TESTING */ 1704 1705 cred = wpabuf_alloc(200); 1706 if (cred == NULL) 1707 return -1; 1708 1709 if (wps_build_credential(cred, &wps->cred)) { 1710 wpabuf_free(cred); 1711 return -1; 1712 } 1713 1714 wpabuf_put_be16(msg, ATTR_CRED); 1715 wpabuf_put_be16(msg, wpabuf_len(cred)); 1716 wpabuf_put_buf(msg, cred); 1717 wpabuf_free(cred); 1718 1719skip_cred_build: 1720 if (wps->wps->registrar->extra_cred) { 1721 wpa_printf(MSG_DEBUG, "WPS: * Credential (pre-configured)"); 1722 wpabuf_put_buf(msg, wps->wps->registrar->extra_cred); 1723 } 1724 1725 return 0; 1726} 1727 1728 1729static int wps_build_ap_settings(struct wps_data *wps, struct wpabuf *msg) 1730{ 1731 wpa_printf(MSG_DEBUG, "WPS: * AP Settings"); 1732 1733 if (wps_build_credential(msg, &wps->cred)) 1734 return -1; 1735 1736 return 0; 1737} 1738 1739 1740static struct wpabuf * wps_build_ap_cred(struct wps_data *wps) 1741{ 1742 struct wpabuf *msg, *plain; 1743 1744 msg = wpabuf_alloc(1000); 1745 if (msg == NULL) 1746 return NULL; 1747 1748 plain = wpabuf_alloc(200); 1749 if (plain == NULL) { 1750 wpabuf_free(msg); 1751 return NULL; 1752 } 1753 1754 if (wps_build_ap_settings(wps, plain)) { 1755 wpabuf_free(plain); 1756 wpabuf_free(msg); 1757 return NULL; 1758 } 1759 1760 wpabuf_put_be16(msg, ATTR_CRED); 1761 wpabuf_put_be16(msg, wpabuf_len(plain)); 1762 wpabuf_put_buf(msg, plain); 1763 wpabuf_free(plain); 1764 1765 return msg; 1766} 1767 1768 1769static struct wpabuf * wps_build_m2(struct wps_data *wps) 1770{ 1771 struct wpabuf *msg; 1772 1773 if (random_get_bytes(wps->nonce_r, WPS_NONCE_LEN) < 0) 1774 return NULL; 1775 wpa_hexdump(MSG_DEBUG, "WPS: Registrar Nonce", 1776 wps->nonce_r, WPS_NONCE_LEN); 1777 wpa_hexdump(MSG_DEBUG, "WPS: UUID-R", wps->uuid_r, WPS_UUID_LEN); 1778 1779 wpa_printf(MSG_DEBUG, "WPS: Building Message M2"); 1780 msg = wpabuf_alloc(1000); 1781 if (msg == NULL) 1782 return NULL; 1783 1784 if (wps_build_version(msg) || 1785 wps_build_msg_type(msg, WPS_M2) || 1786 wps_build_enrollee_nonce(wps, msg) || 1787 wps_build_registrar_nonce(wps, msg) || 1788 wps_build_uuid_r(wps, msg) || 1789 wps_build_public_key(wps, msg) || 1790 wps_derive_keys(wps) || 1791 wps_build_auth_type_flags(wps, msg) || 1792 wps_build_encr_type_flags(wps, msg) || 1793 wps_build_conn_type_flags(wps, msg) || 1794 wps_build_config_methods_r(wps->wps->registrar, msg) || 1795 wps_build_device_attrs(&wps->wps->dev, msg) || 1796 wps_build_rf_bands(&wps->wps->dev, msg) || 1797 wps_build_assoc_state(wps, msg) || 1798 wps_build_config_error(msg, WPS_CFG_NO_ERROR) || 1799 wps_build_dev_password_id(msg, wps->dev_pw_id) || 1800 wps_build_os_version(&wps->wps->dev, msg) || 1801 wps_build_wfa_ext(msg, 0, NULL, 0) || 1802 wps_build_authenticator(wps, msg)) { 1803 wpabuf_free(msg); 1804 return NULL; 1805 } 1806 1807 wps->int_reg = 1; 1808 wps->state = RECV_M3; 1809 return msg; 1810} 1811 1812 1813static struct wpabuf * wps_build_m2d(struct wps_data *wps) 1814{ 1815 struct wpabuf *msg; 1816 u16 err = wps->config_error; 1817 1818 wpa_printf(MSG_DEBUG, "WPS: Building Message M2D"); 1819 msg = wpabuf_alloc(1000); 1820 if (msg == NULL) 1821 return NULL; 1822 1823 if (wps->wps->ap && wps->wps->ap_setup_locked && 1824 err == WPS_CFG_NO_ERROR) 1825 err = WPS_CFG_SETUP_LOCKED; 1826 1827 if (wps_build_version(msg) || 1828 wps_build_msg_type(msg, WPS_M2D) || 1829 wps_build_enrollee_nonce(wps, msg) || 1830 wps_build_registrar_nonce(wps, msg) || 1831 wps_build_uuid_r(wps, msg) || 1832 wps_build_auth_type_flags(wps, msg) || 1833 wps_build_encr_type_flags(wps, msg) || 1834 wps_build_conn_type_flags(wps, msg) || 1835 wps_build_config_methods_r(wps->wps->registrar, msg) || 1836 wps_build_device_attrs(&wps->wps->dev, msg) || 1837 wps_build_rf_bands(&wps->wps->dev, msg) || 1838 wps_build_assoc_state(wps, msg) || 1839 wps_build_config_error(msg, err) || 1840 wps_build_os_version(&wps->wps->dev, msg) || 1841 wps_build_wfa_ext(msg, 0, NULL, 0)) { 1842 wpabuf_free(msg); 1843 return NULL; 1844 } 1845 1846 wps->state = RECV_M2D_ACK; 1847 return msg; 1848} 1849 1850 1851static struct wpabuf * wps_build_m4(struct wps_data *wps) 1852{ 1853 struct wpabuf *msg, *plain; 1854 1855 wpa_printf(MSG_DEBUG, "WPS: Building Message M4"); 1856 1857 wps_derive_psk(wps, wps->dev_password, wps->dev_password_len); 1858 1859 plain = wpabuf_alloc(200); 1860 if (plain == NULL) 1861 return NULL; 1862 1863 msg = wpabuf_alloc(1000); 1864 if (msg == NULL) { 1865 wpabuf_free(plain); 1866 return NULL; 1867 } 1868 1869 if (wps_build_version(msg) || 1870 wps_build_msg_type(msg, WPS_M4) || 1871 wps_build_enrollee_nonce(wps, msg) || 1872 wps_build_r_hash(wps, msg) || 1873 wps_build_r_snonce1(wps, plain) || 1874 wps_build_key_wrap_auth(wps, plain) || 1875 wps_build_encr_settings(wps, msg, plain) || 1876 wps_build_wfa_ext(msg, 0, NULL, 0) || 1877 wps_build_authenticator(wps, msg)) { 1878 wpabuf_free(plain); 1879 wpabuf_free(msg); 1880 return NULL; 1881 } 1882 wpabuf_free(plain); 1883 1884 wps->state = RECV_M5; 1885 return msg; 1886} 1887 1888 1889static struct wpabuf * wps_build_m6(struct wps_data *wps) 1890{ 1891 struct wpabuf *msg, *plain; 1892 1893 wpa_printf(MSG_DEBUG, "WPS: Building Message M6"); 1894 1895 plain = wpabuf_alloc(200); 1896 if (plain == NULL) 1897 return NULL; 1898 1899 msg = wpabuf_alloc(1000); 1900 if (msg == NULL) { 1901 wpabuf_free(plain); 1902 return NULL; 1903 } 1904 1905 if (wps_build_version(msg) || 1906 wps_build_msg_type(msg, WPS_M6) || 1907 wps_build_enrollee_nonce(wps, msg) || 1908 wps_build_r_snonce2(wps, plain) || 1909 wps_build_key_wrap_auth(wps, plain) || 1910 wps_build_encr_settings(wps, msg, plain) || 1911 wps_build_wfa_ext(msg, 0, NULL, 0) || 1912 wps_build_authenticator(wps, msg)) { 1913 wpabuf_free(plain); 1914 wpabuf_free(msg); 1915 return NULL; 1916 } 1917 wpabuf_free(plain); 1918 1919 wps->wps_pin_revealed = 1; 1920 wps->state = RECV_M7; 1921 return msg; 1922} 1923 1924 1925static struct wpabuf * wps_build_m8(struct wps_data *wps) 1926{ 1927 struct wpabuf *msg, *plain; 1928 1929 wpa_printf(MSG_DEBUG, "WPS: Building Message M8"); 1930 1931 plain = wpabuf_alloc(500); 1932 if (plain == NULL) 1933 return NULL; 1934 1935 msg = wpabuf_alloc(1000); 1936 if (msg == NULL) { 1937 wpabuf_free(plain); 1938 return NULL; 1939 } 1940 1941 if (wps_build_version(msg) || 1942 wps_build_msg_type(msg, WPS_M8) || 1943 wps_build_enrollee_nonce(wps, msg) || 1944 ((wps->wps->ap || wps->er) && wps_build_cred(wps, plain)) || 1945 (!wps->wps->ap && !wps->er && wps_build_ap_settings(wps, plain)) || 1946 wps_build_key_wrap_auth(wps, plain) || 1947 wps_build_encr_settings(wps, msg, plain) || 1948 wps_build_wfa_ext(msg, 0, NULL, 0) || 1949 wps_build_authenticator(wps, msg)) { 1950 wpabuf_free(plain); 1951 wpabuf_free(msg); 1952 return NULL; 1953 } 1954 wpabuf_free(plain); 1955 1956 wps->state = RECV_DONE; 1957 return msg; 1958} 1959 1960 1961struct wpabuf * wps_registrar_get_msg(struct wps_data *wps, 1962 enum wsc_op_code *op_code) 1963{ 1964 struct wpabuf *msg; 1965 1966#ifdef CONFIG_WPS_UPNP 1967 if (!wps->int_reg && wps->wps->wps_upnp) { 1968 struct upnp_pending_message *p, *prev = NULL; 1969 if (wps->ext_reg > 1) 1970 wps_registrar_free_pending_m2(wps->wps); 1971 p = wps->wps->upnp_msgs; 1972 /* TODO: check pending message MAC address */ 1973 while (p && p->next) { 1974 prev = p; 1975 p = p->next; 1976 } 1977 if (p) { 1978 wpa_printf(MSG_DEBUG, "WPS: Use pending message from " 1979 "UPnP"); 1980 if (prev) 1981 prev->next = NULL; 1982 else 1983 wps->wps->upnp_msgs = NULL; 1984 msg = p->msg; 1985 switch (p->type) { 1986 case WPS_WSC_ACK: 1987 *op_code = WSC_ACK; 1988 break; 1989 case WPS_WSC_NACK: 1990 *op_code = WSC_NACK; 1991 break; 1992 default: 1993 *op_code = WSC_MSG; 1994 break; 1995 } 1996 os_free(p); 1997 if (wps->ext_reg == 0) 1998 wps->ext_reg = 1; 1999 return msg; 2000 } 2001 } 2002 if (wps->ext_reg) { 2003 wpa_printf(MSG_DEBUG, "WPS: Using external Registrar, but no " 2004 "pending message available"); 2005 return NULL; 2006 } 2007#endif /* CONFIG_WPS_UPNP */ 2008 2009 switch (wps->state) { 2010 case SEND_M2: 2011 if (wps_get_dev_password(wps) < 0) 2012 msg = wps_build_m2d(wps); 2013 else 2014 msg = wps_build_m2(wps); 2015 *op_code = WSC_MSG; 2016 break; 2017 case SEND_M2D: 2018 msg = wps_build_m2d(wps); 2019 *op_code = WSC_MSG; 2020 break; 2021 case SEND_M4: 2022 msg = wps_build_m4(wps); 2023 *op_code = WSC_MSG; 2024 break; 2025 case SEND_M6: 2026 msg = wps_build_m6(wps); 2027 *op_code = WSC_MSG; 2028 break; 2029 case SEND_M8: 2030 msg = wps_build_m8(wps); 2031 *op_code = WSC_MSG; 2032 break; 2033 case RECV_DONE: 2034 msg = wps_build_wsc_ack(wps); 2035 *op_code = WSC_ACK; 2036 break; 2037 case SEND_WSC_NACK: 2038 msg = wps_build_wsc_nack(wps); 2039 *op_code = WSC_NACK; 2040 break; 2041 default: 2042 wpa_printf(MSG_DEBUG, "WPS: Unsupported state %d for building " 2043 "a message", wps->state); 2044 msg = NULL; 2045 break; 2046 } 2047 2048 if (*op_code == WSC_MSG && msg) { 2049 /* Save a copy of the last message for Authenticator derivation 2050 */ 2051 wpabuf_free(wps->last_msg); 2052 wps->last_msg = wpabuf_dup(msg); 2053 } 2054 2055 return msg; 2056} 2057 2058 2059static int wps_process_enrollee_nonce(struct wps_data *wps, const u8 *e_nonce) 2060{ 2061 if (e_nonce == NULL) { 2062 wpa_printf(MSG_DEBUG, "WPS: No Enrollee Nonce received"); 2063 return -1; 2064 } 2065 2066 os_memcpy(wps->nonce_e, e_nonce, WPS_NONCE_LEN); 2067 wpa_hexdump(MSG_DEBUG, "WPS: Enrollee Nonce", 2068 wps->nonce_e, WPS_NONCE_LEN); 2069 2070 return 0; 2071} 2072 2073 2074static int wps_process_registrar_nonce(struct wps_data *wps, const u8 *r_nonce) 2075{ 2076 if (r_nonce == NULL) { 2077 wpa_printf(MSG_DEBUG, "WPS: No Registrar Nonce received"); 2078 return -1; 2079 } 2080 2081 if (os_memcmp(wps->nonce_r, r_nonce, WPS_NONCE_LEN) != 0) { 2082 wpa_printf(MSG_DEBUG, "WPS: Invalid Registrar Nonce received"); 2083 return -1; 2084 } 2085 2086 return 0; 2087} 2088 2089 2090static int wps_process_uuid_e(struct wps_data *wps, const u8 *uuid_e) 2091{ 2092 if (uuid_e == NULL) { 2093 wpa_printf(MSG_DEBUG, "WPS: No UUID-E received"); 2094 return -1; 2095 } 2096 2097 os_memcpy(wps->uuid_e, uuid_e, WPS_UUID_LEN); 2098 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E", wps->uuid_e, WPS_UUID_LEN); 2099 2100 return 0; 2101} 2102 2103 2104static int wps_process_dev_password_id(struct wps_data *wps, const u8 *pw_id) 2105{ 2106 if (pw_id == NULL) { 2107 wpa_printf(MSG_DEBUG, "WPS: No Device Password ID received"); 2108 return -1; 2109 } 2110 2111 wps->dev_pw_id = WPA_GET_BE16(pw_id); 2112 wpa_printf(MSG_DEBUG, "WPS: Device Password ID %d", wps->dev_pw_id); 2113 2114 return 0; 2115} 2116 2117 2118static int wps_process_e_hash1(struct wps_data *wps, const u8 *e_hash1) 2119{ 2120 if (e_hash1 == NULL) { 2121 wpa_printf(MSG_DEBUG, "WPS: No E-Hash1 received"); 2122 return -1; 2123 } 2124 2125 os_memcpy(wps->peer_hash1, e_hash1, WPS_HASH_LEN); 2126 wpa_hexdump(MSG_DEBUG, "WPS: E-Hash1", wps->peer_hash1, WPS_HASH_LEN); 2127 2128 return 0; 2129} 2130 2131 2132static int wps_process_e_hash2(struct wps_data *wps, const u8 *e_hash2) 2133{ 2134 if (e_hash2 == NULL) { 2135 wpa_printf(MSG_DEBUG, "WPS: No E-Hash2 received"); 2136 return -1; 2137 } 2138 2139 os_memcpy(wps->peer_hash2, e_hash2, WPS_HASH_LEN); 2140 wpa_hexdump(MSG_DEBUG, "WPS: E-Hash2", wps->peer_hash2, WPS_HASH_LEN); 2141 2142 return 0; 2143} 2144 2145 2146static int wps_process_e_snonce1(struct wps_data *wps, const u8 *e_snonce1) 2147{ 2148 u8 hash[SHA256_MAC_LEN]; 2149 const u8 *addr[4]; 2150 size_t len[4]; 2151 2152 if (e_snonce1 == NULL) { 2153 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce1 received"); 2154 return -1; 2155 } 2156 2157 wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce1", e_snonce1, 2158 WPS_SECRET_NONCE_LEN); 2159 2160 /* E-Hash1 = HMAC_AuthKey(E-S1 || PSK1 || PK_E || PK_R) */ 2161 addr[0] = e_snonce1; 2162 len[0] = WPS_SECRET_NONCE_LEN; 2163 addr[1] = wps->psk1; 2164 len[1] = WPS_PSK_LEN; 2165 addr[2] = wpabuf_head(wps->dh_pubkey_e); 2166 len[2] = wpabuf_len(wps->dh_pubkey_e); 2167 addr[3] = wpabuf_head(wps->dh_pubkey_r); 2168 len[3] = wpabuf_len(wps->dh_pubkey_r); 2169 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 2170 2171 if (os_memcmp(wps->peer_hash1, hash, WPS_HASH_LEN) != 0) { 2172 wpa_printf(MSG_DEBUG, "WPS: E-Hash1 derived from E-S1 does " 2173 "not match with the pre-committed value"); 2174 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE; 2175 wps_pwd_auth_fail_event(wps->wps, 0, 1); 2176 return -1; 2177 } 2178 2179 wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the first " 2180 "half of the device password"); 2181 2182 return 0; 2183} 2184 2185 2186static int wps_process_e_snonce2(struct wps_data *wps, const u8 *e_snonce2) 2187{ 2188 u8 hash[SHA256_MAC_LEN]; 2189 const u8 *addr[4]; 2190 size_t len[4]; 2191 2192 if (e_snonce2 == NULL) { 2193 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce2 received"); 2194 return -1; 2195 } 2196 2197 wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce2", e_snonce2, 2198 WPS_SECRET_NONCE_LEN); 2199 2200 /* E-Hash2 = HMAC_AuthKey(E-S2 || PSK2 || PK_E || PK_R) */ 2201 addr[0] = e_snonce2; 2202 len[0] = WPS_SECRET_NONCE_LEN; 2203 addr[1] = wps->psk2; 2204 len[1] = WPS_PSK_LEN; 2205 addr[2] = wpabuf_head(wps->dh_pubkey_e); 2206 len[2] = wpabuf_len(wps->dh_pubkey_e); 2207 addr[3] = wpabuf_head(wps->dh_pubkey_r); 2208 len[3] = wpabuf_len(wps->dh_pubkey_r); 2209 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 2210 2211 if (os_memcmp(wps->peer_hash2, hash, WPS_HASH_LEN) != 0) { 2212 wpa_printf(MSG_DEBUG, "WPS: E-Hash2 derived from E-S2 does " 2213 "not match with the pre-committed value"); 2214 wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e); 2215 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE; 2216 wps_pwd_auth_fail_event(wps->wps, 0, 2); 2217 return -1; 2218 } 2219 2220 wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the second " 2221 "half of the device password"); 2222 wps->wps_pin_revealed = 0; 2223 wps_registrar_unlock_pin(wps->wps->registrar, wps->uuid_e); 2224 2225 /* 2226 * In case wildcard PIN is used and WPS handshake succeeds in the first 2227 * attempt, wps_registrar_unlock_pin() would not free the PIN, so make 2228 * sure the PIN gets invalidated here. 2229 */ 2230 wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e); 2231 2232 return 0; 2233} 2234 2235 2236static int wps_process_mac_addr(struct wps_data *wps, const u8 *mac_addr) 2237{ 2238 if (mac_addr == NULL) { 2239 wpa_printf(MSG_DEBUG, "WPS: No MAC Address received"); 2240 return -1; 2241 } 2242 2243 wpa_printf(MSG_DEBUG, "WPS: Enrollee MAC Address " MACSTR, 2244 MAC2STR(mac_addr)); 2245 os_memcpy(wps->mac_addr_e, mac_addr, ETH_ALEN); 2246 os_memcpy(wps->peer_dev.mac_addr, mac_addr, ETH_ALEN); 2247 2248 return 0; 2249} 2250 2251 2252static int wps_process_pubkey(struct wps_data *wps, const u8 *pk, 2253 size_t pk_len) 2254{ 2255 if (pk == NULL || pk_len == 0) { 2256 wpa_printf(MSG_DEBUG, "WPS: No Public Key received"); 2257 return -1; 2258 } 2259 2260 wpabuf_free(wps->dh_pubkey_e); 2261 wps->dh_pubkey_e = wpabuf_alloc_copy(pk, pk_len); 2262 if (wps->dh_pubkey_e == NULL) 2263 return -1; 2264 2265 return 0; 2266} 2267 2268 2269static int wps_process_auth_type_flags(struct wps_data *wps, const u8 *auth) 2270{ 2271 u16 auth_types; 2272 2273 if (auth == NULL) { 2274 wpa_printf(MSG_DEBUG, "WPS: No Authentication Type flags " 2275 "received"); 2276 return -1; 2277 } 2278 2279 auth_types = WPA_GET_BE16(auth); 2280 2281 wpa_printf(MSG_DEBUG, "WPS: Enrollee Authentication Type flags 0x%x", 2282 auth_types); 2283 wps->auth_type = wps->wps->auth_types & auth_types; 2284 if (wps->auth_type == 0) { 2285 wpa_printf(MSG_DEBUG, "WPS: No match in supported " 2286 "authentication types (own 0x%x Enrollee 0x%x)", 2287 wps->wps->auth_types, auth_types); 2288#ifdef WPS_WORKAROUNDS 2289 /* 2290 * Some deployed implementations seem to advertise incorrect 2291 * information in this attribute. For example, Linksys WRT350N 2292 * seems to have a byteorder bug that breaks this negotiation. 2293 * In order to interoperate with existing implementations, 2294 * assume that the Enrollee supports everything we do. 2295 */ 2296 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee " 2297 "does not advertise supported authentication types " 2298 "correctly"); 2299 wps->auth_type = wps->wps->auth_types; 2300#else /* WPS_WORKAROUNDS */ 2301 return -1; 2302#endif /* WPS_WORKAROUNDS */ 2303 } 2304 2305 return 0; 2306} 2307 2308 2309static int wps_process_encr_type_flags(struct wps_data *wps, const u8 *encr) 2310{ 2311 u16 encr_types; 2312 2313 if (encr == NULL) { 2314 wpa_printf(MSG_DEBUG, "WPS: No Encryption Type flags " 2315 "received"); 2316 return -1; 2317 } 2318 2319 encr_types = WPA_GET_BE16(encr); 2320 2321 wpa_printf(MSG_DEBUG, "WPS: Enrollee Encryption Type flags 0x%x", 2322 encr_types); 2323 wps->encr_type = wps->wps->encr_types & encr_types; 2324 if (wps->encr_type == 0) { 2325 wpa_printf(MSG_DEBUG, "WPS: No match in supported " 2326 "encryption types (own 0x%x Enrollee 0x%x)", 2327 wps->wps->encr_types, encr_types); 2328#ifdef WPS_WORKAROUNDS 2329 /* 2330 * Some deployed implementations seem to advertise incorrect 2331 * information in this attribute. For example, Linksys WRT350N 2332 * seems to have a byteorder bug that breaks this negotiation. 2333 * In order to interoperate with existing implementations, 2334 * assume that the Enrollee supports everything we do. 2335 */ 2336 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee " 2337 "does not advertise supported encryption types " 2338 "correctly"); 2339 wps->encr_type = wps->wps->encr_types; 2340#else /* WPS_WORKAROUNDS */ 2341 return -1; 2342#endif /* WPS_WORKAROUNDS */ 2343 } 2344 2345 return 0; 2346} 2347 2348 2349static int wps_process_conn_type_flags(struct wps_data *wps, const u8 *conn) 2350{ 2351 if (conn == NULL) { 2352 wpa_printf(MSG_DEBUG, "WPS: No Connection Type flags " 2353 "received"); 2354 return -1; 2355 } 2356 2357 wpa_printf(MSG_DEBUG, "WPS: Enrollee Connection Type flags 0x%x", 2358 *conn); 2359 2360 return 0; 2361} 2362 2363 2364static int wps_process_config_methods(struct wps_data *wps, const u8 *methods) 2365{ 2366 u16 m; 2367 2368 if (methods == NULL) { 2369 wpa_printf(MSG_DEBUG, "WPS: No Config Methods received"); 2370 return -1; 2371 } 2372 2373 m = WPA_GET_BE16(methods); 2374 2375 wpa_printf(MSG_DEBUG, "WPS: Enrollee Config Methods 0x%x" 2376 "%s%s%s%s%s%s%s%s%s", m, 2377 m & WPS_CONFIG_USBA ? " [USBA]" : "", 2378 m & WPS_CONFIG_ETHERNET ? " [Ethernet]" : "", 2379 m & WPS_CONFIG_LABEL ? " [Label]" : "", 2380 m & WPS_CONFIG_DISPLAY ? " [Display]" : "", 2381 m & WPS_CONFIG_EXT_NFC_TOKEN ? " [Ext NFC Token]" : "", 2382 m & WPS_CONFIG_INT_NFC_TOKEN ? " [Int NFC Token]" : "", 2383 m & WPS_CONFIG_NFC_INTERFACE ? " [NFC]" : "", 2384 m & WPS_CONFIG_PUSHBUTTON ? " [PBC]" : "", 2385 m & WPS_CONFIG_KEYPAD ? " [Keypad]" : ""); 2386 2387 if (!(m & WPS_CONFIG_DISPLAY) && !wps->use_psk_key) { 2388 /* 2389 * The Enrollee does not have a display so it is unlikely to be 2390 * able to show the passphrase to a user and as such, could 2391 * benefit from receiving PSK to reduce key derivation time. 2392 */ 2393 wpa_printf(MSG_DEBUG, "WPS: Prefer PSK format key due to " 2394 "Enrollee not supporting display"); 2395 wps->use_psk_key = 1; 2396 } 2397 2398 return 0; 2399} 2400 2401 2402static int wps_process_wps_state(struct wps_data *wps, const u8 *state) 2403{ 2404 if (state == NULL) { 2405 wpa_printf(MSG_DEBUG, "WPS: No Wi-Fi Protected Setup State " 2406 "received"); 2407 return -1; 2408 } 2409 2410 wpa_printf(MSG_DEBUG, "WPS: Enrollee Wi-Fi Protected Setup State %d", 2411 *state); 2412 2413 return 0; 2414} 2415 2416 2417static int wps_process_assoc_state(struct wps_data *wps, const u8 *assoc) 2418{ 2419 u16 a; 2420 2421 if (assoc == NULL) { 2422 wpa_printf(MSG_DEBUG, "WPS: No Association State received"); 2423 return -1; 2424 } 2425 2426 a = WPA_GET_BE16(assoc); 2427 wpa_printf(MSG_DEBUG, "WPS: Enrollee Association State %d", a); 2428 2429 return 0; 2430} 2431 2432 2433static int wps_process_config_error(struct wps_data *wps, const u8 *err) 2434{ 2435 u16 e; 2436 2437 if (err == NULL) { 2438 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error received"); 2439 return -1; 2440 } 2441 2442 e = WPA_GET_BE16(err); 2443 wpa_printf(MSG_DEBUG, "WPS: Enrollee Configuration Error %d", e); 2444 2445 return 0; 2446} 2447 2448 2449static int wps_registrar_p2p_dev_addr_match(struct wps_data *wps) 2450{ 2451#ifdef CONFIG_P2P 2452 struct wps_registrar *reg = wps->wps->registrar; 2453 2454 if (is_zero_ether_addr(reg->p2p_dev_addr)) 2455 return 1; /* no filtering in use */ 2456 2457 if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) != 0) { 2458 wpa_printf(MSG_DEBUG, "WPS: No match on P2P Device Address " 2459 "filtering for PBC: expected " MACSTR " was " 2460 MACSTR " - indicate PBC session overlap", 2461 MAC2STR(reg->p2p_dev_addr), 2462 MAC2STR(wps->p2p_dev_addr)); 2463 return 0; 2464 } 2465#endif /* CONFIG_P2P */ 2466 return 1; 2467} 2468 2469 2470static int wps_registrar_skip_overlap(struct wps_data *wps) 2471{ 2472#ifdef CONFIG_P2P 2473 struct wps_registrar *reg = wps->wps->registrar; 2474 2475 if (is_zero_ether_addr(reg->p2p_dev_addr)) 2476 return 0; /* no specific Enrollee selected */ 2477 2478 if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) == 0) { 2479 wpa_printf(MSG_DEBUG, "WPS: Skip PBC overlap due to selected " 2480 "Enrollee match"); 2481 return 1; 2482 } 2483#endif /* CONFIG_P2P */ 2484 return 0; 2485} 2486 2487 2488static enum wps_process_res wps_process_m1(struct wps_data *wps, 2489 struct wps_parse_attr *attr) 2490{ 2491 wpa_printf(MSG_DEBUG, "WPS: Received M1"); 2492 2493 if (wps->state != RECV_M1) { 2494 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2495 "receiving M1", wps->state); 2496 return WPS_FAILURE; 2497 } 2498 2499 if (wps_process_uuid_e(wps, attr->uuid_e) || 2500 wps_process_mac_addr(wps, attr->mac_addr) || 2501 wps_process_enrollee_nonce(wps, attr->enrollee_nonce) || 2502 wps_process_pubkey(wps, attr->public_key, attr->public_key_len) || 2503 wps_process_auth_type_flags(wps, attr->auth_type_flags) || 2504 wps_process_encr_type_flags(wps, attr->encr_type_flags) || 2505 wps_process_conn_type_flags(wps, attr->conn_type_flags) || 2506 wps_process_config_methods(wps, attr->config_methods) || 2507 wps_process_wps_state(wps, attr->wps_state) || 2508 wps_process_device_attrs(&wps->peer_dev, attr) || 2509 wps_process_rf_bands(&wps->peer_dev, attr->rf_bands) || 2510 wps_process_assoc_state(wps, attr->assoc_state) || 2511 wps_process_dev_password_id(wps, attr->dev_password_id) || 2512 wps_process_config_error(wps, attr->config_error) || 2513 wps_process_os_version(&wps->peer_dev, attr->os_version)) 2514 return WPS_FAILURE; 2515 2516 if (wps->dev_pw_id < 0x10 && 2517 wps->dev_pw_id != DEV_PW_DEFAULT && 2518 wps->dev_pw_id != DEV_PW_USER_SPECIFIED && 2519 wps->dev_pw_id != DEV_PW_MACHINE_SPECIFIED && 2520 wps->dev_pw_id != DEV_PW_REGISTRAR_SPECIFIED && 2521 (wps->dev_pw_id != DEV_PW_PUSHBUTTON || 2522 !wps->wps->registrar->pbc)) { 2523 wpa_printf(MSG_DEBUG, "WPS: Unsupported Device Password ID %d", 2524 wps->dev_pw_id); 2525 wps->state = SEND_M2D; 2526 return WPS_CONTINUE; 2527 } 2528 2529#ifdef CONFIG_WPS_NFC 2530 if (wps->dev_pw_id >= 0x10) { 2531 struct wps_nfc_pw_token *token; 2532 const u8 *addr[1]; 2533 u8 hash[WPS_HASH_LEN]; 2534 2535 token = wps_get_nfc_pw_token( 2536 &wps->wps->registrar->nfc_pw_tokens, wps->dev_pw_id); 2537 if (token) { 2538 wpa_printf(MSG_DEBUG, "WPS: Found matching NFC " 2539 "Password Token"); 2540 dl_list_del(&token->list); 2541 wps->nfc_pw_token = token; 2542 2543 addr[0] = attr->public_key; 2544 sha256_vector(1, addr, &attr->public_key_len, hash); 2545 if (os_memcmp(hash, wps->nfc_pw_token->pubkey_hash, 2546 WPS_OOB_PUBKEY_HASH_LEN) != 0) { 2547 wpa_printf(MSG_ERROR, "WPS: Public Key hash " 2548 "mismatch"); 2549 return WPS_FAILURE; 2550 } 2551 } 2552 } 2553#endif /* CONFIG_WPS_NFC */ 2554 2555 if (wps->dev_pw_id == DEV_PW_PUSHBUTTON) { 2556 if ((wps->wps->registrar->force_pbc_overlap || 2557 wps_registrar_pbc_overlap(wps->wps->registrar, 2558 wps->mac_addr_e, wps->uuid_e) || 2559 !wps_registrar_p2p_dev_addr_match(wps)) && 2560 !wps_registrar_skip_overlap(wps)) { 2561 wpa_printf(MSG_DEBUG, "WPS: PBC overlap - deny PBC " 2562 "negotiation"); 2563 wps->state = SEND_M2D; 2564 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2565 wps_pbc_overlap_event(wps->wps); 2566 wps_fail_event(wps->wps, WPS_M1, 2567 WPS_CFG_MULTIPLE_PBC_DETECTED, 2568 WPS_EI_NO_ERROR); 2569 wps->wps->registrar->force_pbc_overlap = 1; 2570 return WPS_CONTINUE; 2571 } 2572 wps_registrar_add_pbc_session(wps->wps->registrar, 2573 wps->mac_addr_e, wps->uuid_e); 2574 wps->pbc = 1; 2575 } 2576 2577#ifdef WPS_WORKAROUNDS 2578 /* 2579 * It looks like Mac OS X 10.6.3 and 10.6.4 do not like Network Key in 2580 * passphrase format. To avoid interop issues, force PSK format to be 2581 * used. 2582 */ 2583 if (!wps->use_psk_key && 2584 wps->peer_dev.manufacturer && 2585 os_strncmp(wps->peer_dev.manufacturer, "Apple ", 6) == 0 && 2586 wps->peer_dev.model_name && 2587 os_strcmp(wps->peer_dev.model_name, "AirPort") == 0) { 2588 wpa_printf(MSG_DEBUG, "WPS: Workaround - Force Network Key in " 2589 "PSK format"); 2590 wps->use_psk_key = 1; 2591 } 2592#endif /* WPS_WORKAROUNDS */ 2593 2594 wps->state = SEND_M2; 2595 return WPS_CONTINUE; 2596} 2597 2598 2599static enum wps_process_res wps_process_m3(struct wps_data *wps, 2600 const struct wpabuf *msg, 2601 struct wps_parse_attr *attr) 2602{ 2603 wpa_printf(MSG_DEBUG, "WPS: Received M3"); 2604 2605 if (wps->state != RECV_M3) { 2606 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2607 "receiving M3", wps->state); 2608 wps->state = SEND_WSC_NACK; 2609 return WPS_CONTINUE; 2610 } 2611 2612 if (wps->pbc && wps->wps->registrar->force_pbc_overlap && 2613 !wps_registrar_skip_overlap(wps)) { 2614 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC " 2615 "session overlap"); 2616 wps->state = SEND_WSC_NACK; 2617 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2618 return WPS_CONTINUE; 2619 } 2620 2621 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) || 2622 wps_process_authenticator(wps, attr->authenticator, msg) || 2623 wps_process_e_hash1(wps, attr->e_hash1) || 2624 wps_process_e_hash2(wps, attr->e_hash2)) { 2625 wps->state = SEND_WSC_NACK; 2626 return WPS_CONTINUE; 2627 } 2628 2629 wps->state = SEND_M4; 2630 return WPS_CONTINUE; 2631} 2632 2633 2634static enum wps_process_res wps_process_m5(struct wps_data *wps, 2635 const struct wpabuf *msg, 2636 struct wps_parse_attr *attr) 2637{ 2638 struct wpabuf *decrypted; 2639 struct wps_parse_attr eattr; 2640 2641 wpa_printf(MSG_DEBUG, "WPS: Received M5"); 2642 2643 if (wps->state != RECV_M5) { 2644 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2645 "receiving M5", wps->state); 2646 wps->state = SEND_WSC_NACK; 2647 return WPS_CONTINUE; 2648 } 2649 2650 if (wps->pbc && wps->wps->registrar->force_pbc_overlap && 2651 !wps_registrar_skip_overlap(wps)) { 2652 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC " 2653 "session overlap"); 2654 wps->state = SEND_WSC_NACK; 2655 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2656 return WPS_CONTINUE; 2657 } 2658 2659 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) || 2660 wps_process_authenticator(wps, attr->authenticator, msg)) { 2661 wps->state = SEND_WSC_NACK; 2662 return WPS_CONTINUE; 2663 } 2664 2665 decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings, 2666 attr->encr_settings_len); 2667 if (decrypted == NULL) { 2668 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypted Encrypted " 2669 "Settings attribute"); 2670 wps->state = SEND_WSC_NACK; 2671 return WPS_CONTINUE; 2672 } 2673 2674 if (wps_validate_m5_encr(decrypted, attr->version2 != NULL) < 0) { 2675 wpabuf_free(decrypted); 2676 wps->state = SEND_WSC_NACK; 2677 return WPS_CONTINUE; 2678 } 2679 2680 wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings " 2681 "attribute"); 2682 if (wps_parse_msg(decrypted, &eattr) < 0 || 2683 wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) || 2684 wps_process_e_snonce1(wps, eattr.e_snonce1)) { 2685 wpabuf_free(decrypted); 2686 wps->state = SEND_WSC_NACK; 2687 return WPS_CONTINUE; 2688 } 2689 wpabuf_free(decrypted); 2690 2691 wps->state = SEND_M6; 2692 return WPS_CONTINUE; 2693} 2694 2695 2696static void wps_sta_cred_cb(struct wps_data *wps) 2697{ 2698 /* 2699 * Update credential to only include a single authentication and 2700 * encryption type in case the AP configuration includes more than one 2701 * option. 2702 */ 2703 if (wps->cred.auth_type & WPS_AUTH_WPA2PSK) 2704 wps->cred.auth_type = WPS_AUTH_WPA2PSK; 2705 else if (wps->cred.auth_type & WPS_AUTH_WPAPSK) 2706 wps->cred.auth_type = WPS_AUTH_WPAPSK; 2707 if (wps->cred.encr_type & WPS_ENCR_AES) 2708 wps->cred.encr_type = WPS_ENCR_AES; 2709 else if (wps->cred.encr_type & WPS_ENCR_TKIP) 2710 wps->cred.encr_type = WPS_ENCR_TKIP; 2711 wpa_printf(MSG_DEBUG, "WPS: Update local configuration based on the " 2712 "AP configuration"); 2713 if (wps->wps->cred_cb) 2714 wps->wps->cred_cb(wps->wps->cb_ctx, &wps->cred); 2715} 2716 2717 2718static void wps_cred_update(struct wps_credential *dst, 2719 struct wps_credential *src) 2720{ 2721 os_memcpy(dst->ssid, src->ssid, sizeof(dst->ssid)); 2722 dst->ssid_len = src->ssid_len; 2723 dst->auth_type = src->auth_type; 2724 dst->encr_type = src->encr_type; 2725 dst->key_idx = src->key_idx; 2726 os_memcpy(dst->key, src->key, sizeof(dst->key)); 2727 dst->key_len = src->key_len; 2728} 2729 2730 2731static int wps_process_ap_settings_r(struct wps_data *wps, 2732 struct wps_parse_attr *attr) 2733{ 2734 struct wpabuf *msg; 2735 2736 if (wps->wps->ap || wps->er) 2737 return 0; 2738 2739 /* AP Settings Attributes in M7 when Enrollee is an AP */ 2740 if (wps_process_ap_settings(attr, &wps->cred) < 0) 2741 return -1; 2742 2743 wpa_printf(MSG_INFO, "WPS: Received old AP configuration from AP"); 2744 2745 if (wps->new_ap_settings) { 2746 wpa_printf(MSG_INFO, "WPS: Update AP configuration based on " 2747 "new settings"); 2748 wps_cred_update(&wps->cred, wps->new_ap_settings); 2749 return 0; 2750 } else { 2751 /* 2752 * Use the AP PIN only to receive the current AP settings, not 2753 * to reconfigure the AP. 2754 */ 2755 2756 /* 2757 * Clear selected registrar here since we do not get to 2758 * WSC_Done in this protocol run. 2759 */ 2760 wps_registrar_pin_completed(wps->wps->registrar); 2761 2762 msg = wps_build_ap_cred(wps); 2763 if (msg == NULL) 2764 return -1; 2765 wps->cred.cred_attr = wpabuf_head(msg); 2766 wps->cred.cred_attr_len = wpabuf_len(msg); 2767 2768 if (wps->ap_settings_cb) { 2769 wps->ap_settings_cb(wps->ap_settings_cb_ctx, 2770 &wps->cred); 2771 wpabuf_free(msg); 2772 return 1; 2773 } 2774 wps_sta_cred_cb(wps); 2775 2776 wps->cred.cred_attr = NULL; 2777 wps->cred.cred_attr_len = 0; 2778 wpabuf_free(msg); 2779 2780 return 1; 2781 } 2782} 2783 2784 2785static enum wps_process_res wps_process_m7(struct wps_data *wps, 2786 const struct wpabuf *msg, 2787 struct wps_parse_attr *attr) 2788{ 2789 struct wpabuf *decrypted; 2790 struct wps_parse_attr eattr; 2791 2792 wpa_printf(MSG_DEBUG, "WPS: Received M7"); 2793 2794 if (wps->state != RECV_M7) { 2795 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2796 "receiving M7", wps->state); 2797 wps->state = SEND_WSC_NACK; 2798 return WPS_CONTINUE; 2799 } 2800 2801 if (wps->pbc && wps->wps->registrar->force_pbc_overlap && 2802 !wps_registrar_skip_overlap(wps)) { 2803 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC " 2804 "session overlap"); 2805 wps->state = SEND_WSC_NACK; 2806 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2807 return WPS_CONTINUE; 2808 } 2809 2810 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) || 2811 wps_process_authenticator(wps, attr->authenticator, msg)) { 2812 wps->state = SEND_WSC_NACK; 2813 return WPS_CONTINUE; 2814 } 2815 2816 decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings, 2817 attr->encr_settings_len); 2818 if (decrypted == NULL) { 2819 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypt Encrypted " 2820 "Settings attribute"); 2821 wps->state = SEND_WSC_NACK; 2822 return WPS_CONTINUE; 2823 } 2824 2825 if (wps_validate_m7_encr(decrypted, wps->wps->ap || wps->er, 2826 attr->version2 != NULL) < 0) { 2827 wpabuf_free(decrypted); 2828 wps->state = SEND_WSC_NACK; 2829 return WPS_CONTINUE; 2830 } 2831 2832 wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings " 2833 "attribute"); 2834 if (wps_parse_msg(decrypted, &eattr) < 0 || 2835 wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) || 2836 wps_process_e_snonce2(wps, eattr.e_snonce2) || 2837 wps_process_ap_settings_r(wps, &eattr)) { 2838 wpabuf_free(decrypted); 2839 wps->state = SEND_WSC_NACK; 2840 return WPS_CONTINUE; 2841 } 2842 2843 wpabuf_free(decrypted); 2844 2845 wps->state = SEND_M8; 2846 return WPS_CONTINUE; 2847} 2848 2849 2850static enum wps_process_res wps_process_wsc_msg(struct wps_data *wps, 2851 const struct wpabuf *msg) 2852{ 2853 struct wps_parse_attr attr; 2854 enum wps_process_res ret = WPS_CONTINUE; 2855 2856 wpa_printf(MSG_DEBUG, "WPS: Received WSC_MSG"); 2857 2858 if (wps_parse_msg(msg, &attr) < 0) 2859 return WPS_FAILURE; 2860 2861 if (attr.msg_type == NULL) { 2862 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 2863 wps->state = SEND_WSC_NACK; 2864 return WPS_CONTINUE; 2865 } 2866 2867 if (*attr.msg_type != WPS_M1 && 2868 (attr.registrar_nonce == NULL || 2869 os_memcmp(wps->nonce_r, attr.registrar_nonce, 2870 WPS_NONCE_LEN) != 0)) { 2871 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 2872 return WPS_FAILURE; 2873 } 2874 2875 switch (*attr.msg_type) { 2876 case WPS_M1: 2877 if (wps_validate_m1(msg) < 0) 2878 return WPS_FAILURE; 2879#ifdef CONFIG_WPS_UPNP 2880 if (wps->wps->wps_upnp && attr.mac_addr) { 2881 /* Remove old pending messages when starting new run */ 2882 wps_free_pending_msgs(wps->wps->upnp_msgs); 2883 wps->wps->upnp_msgs = NULL; 2884 2885 upnp_wps_device_send_wlan_event( 2886 wps->wps->wps_upnp, attr.mac_addr, 2887 UPNP_WPS_WLANEVENT_TYPE_EAP, msg); 2888 } 2889#endif /* CONFIG_WPS_UPNP */ 2890 ret = wps_process_m1(wps, &attr); 2891 break; 2892 case WPS_M3: 2893 if (wps_validate_m3(msg) < 0) 2894 return WPS_FAILURE; 2895 ret = wps_process_m3(wps, msg, &attr); 2896 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK) 2897 wps_fail_event(wps->wps, WPS_M3, wps->config_error, 2898 wps->error_indication); 2899 break; 2900 case WPS_M5: 2901 if (wps_validate_m5(msg) < 0) 2902 return WPS_FAILURE; 2903 ret = wps_process_m5(wps, msg, &attr); 2904 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK) 2905 wps_fail_event(wps->wps, WPS_M5, wps->config_error, 2906 wps->error_indication); 2907 break; 2908 case WPS_M7: 2909 if (wps_validate_m7(msg) < 0) 2910 return WPS_FAILURE; 2911 ret = wps_process_m7(wps, msg, &attr); 2912 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK) 2913 wps_fail_event(wps->wps, WPS_M7, wps->config_error, 2914 wps->error_indication); 2915 break; 2916 default: 2917 wpa_printf(MSG_DEBUG, "WPS: Unsupported Message Type %d", 2918 *attr.msg_type); 2919 return WPS_FAILURE; 2920 } 2921 2922 if (ret == WPS_CONTINUE) { 2923 /* Save a copy of the last message for Authenticator derivation 2924 */ 2925 wpabuf_free(wps->last_msg); 2926 wps->last_msg = wpabuf_dup(msg); 2927 } 2928 2929 return ret; 2930} 2931 2932 2933static enum wps_process_res wps_process_wsc_ack(struct wps_data *wps, 2934 const struct wpabuf *msg) 2935{ 2936 struct wps_parse_attr attr; 2937 2938 wpa_printf(MSG_DEBUG, "WPS: Received WSC_ACK"); 2939 2940 if (wps_parse_msg(msg, &attr) < 0) 2941 return WPS_FAILURE; 2942 2943 if (attr.msg_type == NULL) { 2944 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 2945 return WPS_FAILURE; 2946 } 2947 2948 if (*attr.msg_type != WPS_WSC_ACK) { 2949 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d", 2950 *attr.msg_type); 2951 return WPS_FAILURE; 2952 } 2953 2954#ifdef CONFIG_WPS_UPNP 2955 if (wps->wps->wps_upnp && wps->ext_reg && wps->state == RECV_M2D_ACK && 2956 upnp_wps_subscribers(wps->wps->wps_upnp)) { 2957 if (wps->wps->upnp_msgs) 2958 return WPS_CONTINUE; 2959 wpa_printf(MSG_DEBUG, "WPS: Wait for response from an " 2960 "external Registrar"); 2961 return WPS_PENDING; 2962 } 2963#endif /* CONFIG_WPS_UPNP */ 2964 2965 if (attr.registrar_nonce == NULL || 2966 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0) 2967 { 2968 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 2969 return WPS_FAILURE; 2970 } 2971 2972 if (attr.enrollee_nonce == NULL || 2973 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) { 2974 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce"); 2975 return WPS_FAILURE; 2976 } 2977 2978 if (wps->state == RECV_M2D_ACK) { 2979#ifdef CONFIG_WPS_UPNP 2980 if (wps->wps->wps_upnp && 2981 upnp_wps_subscribers(wps->wps->wps_upnp)) { 2982 if (wps->wps->upnp_msgs) 2983 return WPS_CONTINUE; 2984 if (wps->ext_reg == 0) 2985 wps->ext_reg = 1; 2986 wpa_printf(MSG_DEBUG, "WPS: Wait for response from an " 2987 "external Registrar"); 2988 return WPS_PENDING; 2989 } 2990#endif /* CONFIG_WPS_UPNP */ 2991 2992 wpa_printf(MSG_DEBUG, "WPS: No more registrars available - " 2993 "terminate negotiation"); 2994 } 2995 2996 return WPS_FAILURE; 2997} 2998 2999 3000static enum wps_process_res wps_process_wsc_nack(struct wps_data *wps, 3001 const struct wpabuf *msg) 3002{ 3003 struct wps_parse_attr attr; 3004 int old_state; 3005 u16 config_error; 3006 3007 wpa_printf(MSG_DEBUG, "WPS: Received WSC_NACK"); 3008 3009 old_state = wps->state; 3010 wps->state = SEND_WSC_NACK; 3011 3012 if (wps_parse_msg(msg, &attr) < 0) 3013 return WPS_FAILURE; 3014 3015 if (attr.msg_type == NULL) { 3016 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 3017 return WPS_FAILURE; 3018 } 3019 3020 if (*attr.msg_type != WPS_WSC_NACK) { 3021 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d", 3022 *attr.msg_type); 3023 return WPS_FAILURE; 3024 } 3025 3026#ifdef CONFIG_WPS_UPNP 3027 if (wps->wps->wps_upnp && wps->ext_reg) { 3028 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external " 3029 "Registrar terminated by the Enrollee"); 3030 return WPS_FAILURE; 3031 } 3032#endif /* CONFIG_WPS_UPNP */ 3033 3034 if (attr.registrar_nonce == NULL || 3035 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0) 3036 { 3037 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 3038 return WPS_FAILURE; 3039 } 3040 3041 if (attr.enrollee_nonce == NULL || 3042 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) { 3043 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce"); 3044 return WPS_FAILURE; 3045 } 3046 3047 if (attr.config_error == NULL) { 3048 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error attribute " 3049 "in WSC_NACK"); 3050 return WPS_FAILURE; 3051 } 3052 3053 config_error = WPA_GET_BE16(attr.config_error); 3054 wpa_printf(MSG_DEBUG, "WPS: Enrollee terminated negotiation with " 3055 "Configuration Error %d", config_error); 3056 3057 switch (old_state) { 3058 case RECV_M3: 3059 wps_fail_event(wps->wps, WPS_M2, config_error, 3060 wps->error_indication); 3061 break; 3062 case RECV_M5: 3063 wps_fail_event(wps->wps, WPS_M4, config_error, 3064 wps->error_indication); 3065 break; 3066 case RECV_M7: 3067 wps_fail_event(wps->wps, WPS_M6, config_error, 3068 wps->error_indication); 3069 break; 3070 case RECV_DONE: 3071 wps_fail_event(wps->wps, WPS_M8, config_error, 3072 wps->error_indication); 3073 break; 3074 default: 3075 break; 3076 } 3077 3078 return WPS_FAILURE; 3079} 3080 3081 3082static enum wps_process_res wps_process_wsc_done(struct wps_data *wps, 3083 const struct wpabuf *msg) 3084{ 3085 struct wps_parse_attr attr; 3086 3087 wpa_printf(MSG_DEBUG, "WPS: Received WSC_Done"); 3088 3089 if (wps->state != RECV_DONE && 3090 (!wps->wps->wps_upnp || !wps->ext_reg)) { 3091 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 3092 "receiving WSC_Done", wps->state); 3093 return WPS_FAILURE; 3094 } 3095 3096 if (wps_parse_msg(msg, &attr) < 0) 3097 return WPS_FAILURE; 3098 3099 if (attr.msg_type == NULL) { 3100 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 3101 return WPS_FAILURE; 3102 } 3103 3104 if (*attr.msg_type != WPS_WSC_DONE) { 3105 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d", 3106 *attr.msg_type); 3107 return WPS_FAILURE; 3108 } 3109 3110#ifdef CONFIG_WPS_UPNP 3111 if (wps->wps->wps_upnp && wps->ext_reg) { 3112 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external " 3113 "Registrar completed successfully"); 3114 wps_device_store(wps->wps->registrar, &wps->peer_dev, 3115 wps->uuid_e); 3116 return WPS_DONE; 3117 } 3118#endif /* CONFIG_WPS_UPNP */ 3119 3120 if (attr.registrar_nonce == NULL || 3121 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0) 3122 { 3123 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 3124 return WPS_FAILURE; 3125 } 3126 3127 if (attr.enrollee_nonce == NULL || 3128 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) { 3129 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce"); 3130 return WPS_FAILURE; 3131 } 3132 3133 wpa_printf(MSG_DEBUG, "WPS: Negotiation completed successfully"); 3134 wps_device_store(wps->wps->registrar, &wps->peer_dev, 3135 wps->uuid_e); 3136 3137 if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->new_psk && 3138 wps->wps->ap && !wps->wps->registrar->disable_auto_conf) { 3139 struct wps_credential cred; 3140 3141 wpa_printf(MSG_DEBUG, "WPS: Moving to Configured state based " 3142 "on first Enrollee connection"); 3143 3144 os_memset(&cred, 0, sizeof(cred)); 3145 os_memcpy(cred.ssid, wps->wps->ssid, wps->wps->ssid_len); 3146 cred.ssid_len = wps->wps->ssid_len; 3147 cred.auth_type = WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK; 3148 cred.encr_type = WPS_ENCR_TKIP | WPS_ENCR_AES; 3149 os_memcpy(cred.key, wps->new_psk, wps->new_psk_len); 3150 cred.key_len = wps->new_psk_len; 3151 3152 wps->wps->wps_state = WPS_STATE_CONFIGURED; 3153 wpa_hexdump_ascii_key(MSG_DEBUG, 3154 "WPS: Generated random passphrase", 3155 wps->new_psk, wps->new_psk_len); 3156 if (wps->wps->cred_cb) 3157 wps->wps->cred_cb(wps->wps->cb_ctx, &cred); 3158 3159 os_free(wps->new_psk); 3160 wps->new_psk = NULL; 3161 } 3162 3163 if (!wps->wps->ap && !wps->er) 3164 wps_sta_cred_cb(wps); 3165 3166 if (wps->new_psk) { 3167 if (wps_cb_new_psk(wps->wps->registrar, wps->mac_addr_e, 3168 wps->new_psk, wps->new_psk_len)) { 3169 wpa_printf(MSG_DEBUG, "WPS: Failed to configure the " 3170 "new PSK"); 3171 } 3172 os_free(wps->new_psk); 3173 wps->new_psk = NULL; 3174 } 3175 3176 wps_cb_reg_success(wps->wps->registrar, wps->mac_addr_e, wps->uuid_e, 3177 wps->dev_password, wps->dev_password_len); 3178 3179 if (wps->pbc) { 3180 wps_registrar_remove_pbc_session(wps->wps->registrar, 3181 wps->uuid_e, 3182 wps->p2p_dev_addr); 3183 wps_registrar_pbc_completed(wps->wps->registrar); 3184 os_get_time(&wps->wps->registrar->pbc_ignore_start); 3185 os_memcpy(wps->wps->registrar->pbc_ignore_uuid, wps->uuid_e, 3186 WPS_UUID_LEN); 3187 } else { 3188 wps_registrar_pin_completed(wps->wps->registrar); 3189 } 3190 /* TODO: maintain AuthorizedMACs somewhere separately for each ER and 3191 * merge them into APs own list.. */ 3192 3193 wps_success_event(wps->wps); 3194 3195 return WPS_DONE; 3196} 3197 3198 3199enum wps_process_res wps_registrar_process_msg(struct wps_data *wps, 3200 enum wsc_op_code op_code, 3201 const struct wpabuf *msg) 3202{ 3203 enum wps_process_res ret; 3204 3205 wpa_printf(MSG_DEBUG, "WPS: Processing received message (len=%lu " 3206 "op_code=%d)", 3207 (unsigned long) wpabuf_len(msg), op_code); 3208 3209#ifdef CONFIG_WPS_UPNP 3210 if (wps->wps->wps_upnp && op_code == WSC_MSG && wps->ext_reg == 1) { 3211 struct wps_parse_attr attr; 3212 if (wps_parse_msg(msg, &attr) == 0 && attr.msg_type && 3213 *attr.msg_type == WPS_M3) 3214 wps->ext_reg = 2; /* past M2/M2D phase */ 3215 } 3216 if (wps->ext_reg > 1) 3217 wps_registrar_free_pending_m2(wps->wps); 3218 if (wps->wps->wps_upnp && wps->ext_reg && 3219 wps->wps->upnp_msgs == NULL && 3220 (op_code == WSC_MSG || op_code == WSC_Done || op_code == WSC_NACK)) 3221 { 3222 struct wps_parse_attr attr; 3223 int type; 3224 if (wps_parse_msg(msg, &attr) < 0 || attr.msg_type == NULL) 3225 type = -1; 3226 else 3227 type = *attr.msg_type; 3228 wpa_printf(MSG_DEBUG, "WPS: Sending received message (type %d)" 3229 " to external Registrar for processing", type); 3230 upnp_wps_device_send_wlan_event(wps->wps->wps_upnp, 3231 wps->mac_addr_e, 3232 UPNP_WPS_WLANEVENT_TYPE_EAP, 3233 msg); 3234 if (op_code == WSC_MSG) 3235 return WPS_PENDING; 3236 } else if (wps->wps->wps_upnp && wps->ext_reg && op_code == WSC_MSG) { 3237 wpa_printf(MSG_DEBUG, "WPS: Skip internal processing - using " 3238 "external Registrar"); 3239 return WPS_CONTINUE; 3240 } 3241#endif /* CONFIG_WPS_UPNP */ 3242 3243 switch (op_code) { 3244 case WSC_MSG: 3245 return wps_process_wsc_msg(wps, msg); 3246 case WSC_ACK: 3247 if (wps_validate_wsc_ack(msg) < 0) 3248 return WPS_FAILURE; 3249 return wps_process_wsc_ack(wps, msg); 3250 case WSC_NACK: 3251 if (wps_validate_wsc_nack(msg) < 0) 3252 return WPS_FAILURE; 3253 return wps_process_wsc_nack(wps, msg); 3254 case WSC_Done: 3255 if (wps_validate_wsc_done(msg) < 0) 3256 return WPS_FAILURE; 3257 ret = wps_process_wsc_done(wps, msg); 3258 if (ret == WPS_FAILURE) { 3259 wps->state = SEND_WSC_NACK; 3260 wps_fail_event(wps->wps, WPS_WSC_DONE, 3261 wps->config_error, 3262 wps->error_indication); 3263 } 3264 return ret; 3265 default: 3266 wpa_printf(MSG_DEBUG, "WPS: Unsupported op_code %d", op_code); 3267 return WPS_FAILURE; 3268 } 3269} 3270 3271 3272int wps_registrar_update_ie(struct wps_registrar *reg) 3273{ 3274 return wps_set_ie(reg); 3275} 3276 3277 3278static void wps_registrar_set_selected_timeout(void *eloop_ctx, 3279 void *timeout_ctx) 3280{ 3281 struct wps_registrar *reg = eloop_ctx; 3282 3283 wpa_printf(MSG_DEBUG, "WPS: Selected Registrar timeout - " 3284 "unselect internal Registrar"); 3285 reg->selected_registrar = 0; 3286 reg->pbc = 0; 3287 wps_registrar_selected_registrar_changed(reg, 0); 3288} 3289 3290 3291#ifdef CONFIG_WPS_UPNP 3292static void wps_registrar_sel_reg_add(struct wps_registrar *reg, 3293 struct subscription *s) 3294{ 3295 int i, j; 3296 wpa_printf(MSG_DEBUG, "WPS: External Registrar selected (dev_pw_id=%d " 3297 "config_methods=0x%x)", 3298 s->dev_password_id, s->config_methods); 3299 reg->sel_reg_union = 1; 3300 if (reg->sel_reg_dev_password_id_override != DEV_PW_PUSHBUTTON) 3301 reg->sel_reg_dev_password_id_override = s->dev_password_id; 3302 if (reg->sel_reg_config_methods_override == -1) 3303 reg->sel_reg_config_methods_override = 0; 3304 reg->sel_reg_config_methods_override |= s->config_methods; 3305 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++) 3306 if (is_zero_ether_addr(reg->authorized_macs_union[i])) 3307 break; 3308 for (j = 0; i < WPS_MAX_AUTHORIZED_MACS && j < WPS_MAX_AUTHORIZED_MACS; 3309 j++) { 3310 if (is_zero_ether_addr(s->authorized_macs[j])) 3311 break; 3312 wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC into union: " 3313 MACSTR, MAC2STR(s->authorized_macs[j])); 3314 os_memcpy(reg->authorized_macs_union[i], 3315 s->authorized_macs[j], ETH_ALEN); 3316 i++; 3317 } 3318 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union", 3319 (u8 *) reg->authorized_macs_union, 3320 sizeof(reg->authorized_macs_union)); 3321} 3322#endif /* CONFIG_WPS_UPNP */ 3323 3324 3325static void wps_registrar_sel_reg_union(struct wps_registrar *reg) 3326{ 3327#ifdef CONFIG_WPS_UPNP 3328 struct subscription *s; 3329 3330 if (reg->wps->wps_upnp == NULL) 3331 return; 3332 3333 dl_list_for_each(s, ®->wps->wps_upnp->subscriptions, 3334 struct subscription, list) { 3335 struct subscr_addr *sa; 3336 sa = dl_list_first(&s->addr_list, struct subscr_addr, list); 3337 if (sa) { 3338 wpa_printf(MSG_DEBUG, "WPS: External Registrar %s:%d", 3339 inet_ntoa(sa->saddr.sin_addr), 3340 ntohs(sa->saddr.sin_port)); 3341 } 3342 if (s->selected_registrar) 3343 wps_registrar_sel_reg_add(reg, s); 3344 else 3345 wpa_printf(MSG_DEBUG, "WPS: External Registrar not " 3346 "selected"); 3347 } 3348#endif /* CONFIG_WPS_UPNP */ 3349} 3350 3351 3352/** 3353 * wps_registrar_selected_registrar_changed - SetSelectedRegistrar change 3354 * @reg: Registrar data from wps_registrar_init() 3355 * 3356 * This function is called when selected registrar state changes, e.g., when an 3357 * AP receives a SetSelectedRegistrar UPnP message. 3358 */ 3359void wps_registrar_selected_registrar_changed(struct wps_registrar *reg, 3360 u16 dev_pw_id) 3361{ 3362 wpa_printf(MSG_DEBUG, "WPS: Selected registrar information changed"); 3363 3364 reg->sel_reg_union = reg->selected_registrar; 3365 reg->sel_reg_dev_password_id_override = -1; 3366 reg->sel_reg_config_methods_override = -1; 3367 os_memcpy(reg->authorized_macs_union, reg->authorized_macs, 3368 WPS_MAX_AUTHORIZED_MACS * ETH_ALEN); 3369 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union (start with own)", 3370 (u8 *) reg->authorized_macs_union, 3371 sizeof(reg->authorized_macs_union)); 3372 if (reg->selected_registrar) { 3373 u16 methods; 3374 3375 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON; 3376#ifdef CONFIG_WPS2 3377 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 3378 WPS_CONFIG_PHY_PUSHBUTTON); 3379#endif /* CONFIG_WPS2 */ 3380 if (reg->pbc) { 3381 reg->sel_reg_dev_password_id_override = 3382 DEV_PW_PUSHBUTTON; 3383 wps_set_pushbutton(&methods, reg->wps->config_methods); 3384 } else if (dev_pw_id) 3385 reg->sel_reg_dev_password_id_override = dev_pw_id; 3386 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar selected " 3387 "(pbc=%d)", reg->pbc); 3388 reg->sel_reg_config_methods_override = methods; 3389 } else 3390 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar not selected"); 3391 3392 wps_registrar_sel_reg_union(reg); 3393 3394 wps_set_ie(reg); 3395 wps_cb_set_sel_reg(reg); 3396} 3397 3398 3399int wps_registrar_get_info(struct wps_registrar *reg, const u8 *addr, 3400 char *buf, size_t buflen) 3401{ 3402 struct wps_registrar_device *d; 3403 int len = 0, ret; 3404 char uuid[40]; 3405 char devtype[WPS_DEV_TYPE_BUFSIZE]; 3406 3407 d = wps_device_get(reg, addr); 3408 if (d == NULL) 3409 return 0; 3410 if (uuid_bin2str(d->uuid, uuid, sizeof(uuid))) 3411 return 0; 3412 3413 ret = os_snprintf(buf + len, buflen - len, 3414 "wpsUuid=%s\n" 3415 "wpsPrimaryDeviceType=%s\n" 3416 "wpsDeviceName=%s\n" 3417 "wpsManufacturer=%s\n" 3418 "wpsModelName=%s\n" 3419 "wpsModelNumber=%s\n" 3420 "wpsSerialNumber=%s\n", 3421 uuid, 3422 wps_dev_type_bin2str(d->dev.pri_dev_type, devtype, 3423 sizeof(devtype)), 3424 d->dev.device_name ? d->dev.device_name : "", 3425 d->dev.manufacturer ? d->dev.manufacturer : "", 3426 d->dev.model_name ? d->dev.model_name : "", 3427 d->dev.model_number ? d->dev.model_number : "", 3428 d->dev.serial_number ? d->dev.serial_number : ""); 3429 if (ret < 0 || (size_t) ret >= buflen - len) 3430 return len; 3431 len += ret; 3432 3433 return len; 3434} 3435 3436 3437int wps_registrar_config_ap(struct wps_registrar *reg, 3438 struct wps_credential *cred) 3439{ 3440#ifdef CONFIG_WPS2 3441 printf("encr_type=0x%x\n", cred->encr_type); 3442 if (!(cred->encr_type & (WPS_ENCR_NONE | WPS_ENCR_TKIP | 3443 WPS_ENCR_AES))) { 3444 if (cred->encr_type & WPS_ENCR_WEP) { 3445 wpa_printf(MSG_INFO, "WPS: Reject new AP settings " 3446 "due to WEP configuration"); 3447 return -1; 3448 } 3449 3450 wpa_printf(MSG_INFO, "WPS: Reject new AP settings due to " 3451 "invalid encr_type 0x%x", cred->encr_type); 3452 return -1; 3453 } 3454 3455 if ((cred->encr_type & (WPS_ENCR_TKIP | WPS_ENCR_AES)) == 3456 WPS_ENCR_TKIP) { 3457 wpa_printf(MSG_DEBUG, "WPS: Upgrade encr_type TKIP -> " 3458 "TKIP+AES"); 3459 cred->encr_type |= WPS_ENCR_AES; 3460 } 3461 3462 if ((cred->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) == 3463 WPS_AUTH_WPAPSK) { 3464 wpa_printf(MSG_DEBUG, "WPS: Upgrade auth_type WPAPSK -> " 3465 "WPAPSK+WPA2PSK"); 3466 cred->auth_type |= WPS_AUTH_WPA2PSK; 3467 } 3468#endif /* CONFIG_WPS2 */ 3469 3470 if (reg->wps->cred_cb) 3471 return reg->wps->cred_cb(reg->wps->cb_ctx, cred); 3472 3473 return -1; 3474} 3475 3476 3477#ifdef CONFIG_WPS_NFC 3478 3479int wps_registrar_add_nfc_pw_token(struct wps_registrar *reg, 3480 const u8 *pubkey_hash, u16 pw_id, 3481 const u8 *dev_pw, size_t dev_pw_len) 3482{ 3483 struct wps_nfc_pw_token *token; 3484 3485 if (dev_pw_len > WPS_OOB_DEVICE_PASSWORD_LEN) 3486 return -1; 3487 3488 wps_free_nfc_pw_tokens(®->nfc_pw_tokens, pw_id); 3489 3490 token = os_zalloc(sizeof(*token)); 3491 if (token == NULL) 3492 return -1; 3493 3494 os_memcpy(token->pubkey_hash, pubkey_hash, WPS_OOB_PUBKEY_HASH_LEN); 3495 token->pw_id = pw_id; 3496 wpa_snprintf_hex_uppercase((char *) token->dev_pw, 3497 sizeof(token->dev_pw), 3498 dev_pw, dev_pw_len); 3499 token->dev_pw_len = dev_pw_len * 2; 3500 3501 dl_list_add(®->nfc_pw_tokens, &token->list); 3502 3503 reg->selected_registrar = 1; 3504 reg->pbc = 0; 3505 wps_registrar_add_authorized_mac(reg, 3506 (u8 *) "\xff\xff\xff\xff\xff\xff"); 3507 wps_registrar_selected_registrar_changed(reg, pw_id); 3508 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 3509 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, 3510 wps_registrar_set_selected_timeout, 3511 reg, NULL); 3512 3513 wpa_printf(MSG_DEBUG, "WPS: Added NFC Device Password %u to Registrar", 3514 pw_id); 3515 3516 return 0; 3517} 3518 3519 3520int wps_registrar_add_nfc_password_token(struct wps_registrar *reg, 3521 const u8 *oob_dev_pw, 3522 size_t oob_dev_pw_len) 3523{ 3524 const u8 *pos, *hash, *dev_pw; 3525 u16 id; 3526 size_t dev_pw_len; 3527 3528 if (oob_dev_pw_len < WPS_OOB_PUBKEY_HASH_LEN + 2 + 3529 WPS_OOB_DEVICE_PASSWORD_MIN_LEN || 3530 oob_dev_pw_len > WPS_OOB_PUBKEY_HASH_LEN + 2 + 3531 WPS_OOB_DEVICE_PASSWORD_LEN) 3532 return -1; 3533 3534 hash = oob_dev_pw; 3535 pos = oob_dev_pw + WPS_OOB_PUBKEY_HASH_LEN; 3536 id = WPA_GET_BE16(pos); 3537 dev_pw = pos + 2; 3538 dev_pw_len = oob_dev_pw + oob_dev_pw_len - dev_pw; 3539 3540 wpa_printf(MSG_DEBUG, "WPS: Add NFC Password Token for Password ID %u", 3541 id); 3542 3543 wpa_hexdump(MSG_DEBUG, "WPS: Public Key Hash", 3544 hash, WPS_OOB_PUBKEY_HASH_LEN); 3545 wpa_hexdump_key(MSG_DEBUG, "WPS: Device Password", dev_pw, dev_pw_len); 3546 3547 return wps_registrar_add_nfc_pw_token(reg, hash, id, dev_pw, 3548 dev_pw_len); 3549} 3550 3551 3552void wps_registrar_remove_nfc_pw_token(struct wps_registrar *reg, 3553 struct wps_nfc_pw_token *token) 3554{ 3555 wps_registrar_remove_authorized_mac(reg, 3556 (u8 *) "\xff\xff\xff\xff\xff\xff"); 3557 wps_registrar_selected_registrar_changed(reg, 0); 3558} 3559 3560#endif /* CONFIG_WPS_NFC */ 3561