wps_registrar.c revision 391c59f0632df8db1c325da1d31d479b2eedce45
1/* 2 * Wi-Fi Protected Setup - Registrar 3 * Copyright (c) 2008-2013, Jouni Malinen <j@w1.fi> 4 * 5 * This software may be distributed under the terms of the BSD license. 6 * See README for more details. 7 */ 8 9#include "utils/includes.h" 10 11#include "utils/common.h" 12#include "utils/base64.h" 13#include "utils/eloop.h" 14#include "utils/uuid.h" 15#include "utils/list.h" 16#include "crypto/crypto.h" 17#include "crypto/sha256.h" 18#include "crypto/random.h" 19#include "common/ieee802_11_defs.h" 20#include "wps_i.h" 21#include "wps_dev_attr.h" 22#include "wps_upnp.h" 23#include "wps_upnp_i.h" 24 25#ifndef CONFIG_WPS_STRICT 26#define WPS_WORKAROUNDS 27#endif /* CONFIG_WPS_STRICT */ 28 29#ifdef CONFIG_WPS_NFC 30 31struct wps_nfc_pw_token { 32 struct dl_list list; 33 u8 pubkey_hash[WPS_OOB_PUBKEY_HASH_LEN]; 34 u16 pw_id; 35 u8 dev_pw[WPS_OOB_DEVICE_PASSWORD_LEN * 2 + 1]; 36 size_t dev_pw_len; 37}; 38 39 40static void wps_remove_nfc_pw_token(struct wps_nfc_pw_token *token) 41{ 42 dl_list_del(&token->list); 43 os_free(token); 44} 45 46 47static void wps_free_nfc_pw_tokens(struct dl_list *tokens, u16 pw_id) 48{ 49 struct wps_nfc_pw_token *token, *prev; 50 dl_list_for_each_safe(token, prev, tokens, struct wps_nfc_pw_token, 51 list) { 52 if (pw_id == 0 || pw_id == token->pw_id) 53 wps_remove_nfc_pw_token(token); 54 } 55} 56 57 58static struct wps_nfc_pw_token * wps_get_nfc_pw_token(struct dl_list *tokens, 59 u16 pw_id) 60{ 61 struct wps_nfc_pw_token *token; 62 dl_list_for_each(token, tokens, struct wps_nfc_pw_token, list) { 63 if (pw_id == token->pw_id) 64 return token; 65 } 66 return NULL; 67} 68 69#else /* CONFIG_WPS_NFC */ 70 71#define wps_free_nfc_pw_tokens(t, p) do { } while (0) 72 73#endif /* CONFIG_WPS_NFC */ 74 75 76struct wps_uuid_pin { 77 struct dl_list list; 78 u8 uuid[WPS_UUID_LEN]; 79 int wildcard_uuid; 80 u8 *pin; 81 size_t pin_len; 82#define PIN_LOCKED BIT(0) 83#define PIN_EXPIRES BIT(1) 84 int flags; 85 struct os_time expiration; 86 u8 enrollee_addr[ETH_ALEN]; 87}; 88 89 90static void wps_free_pin(struct wps_uuid_pin *pin) 91{ 92 os_free(pin->pin); 93 os_free(pin); 94} 95 96 97static void wps_remove_pin(struct wps_uuid_pin *pin) 98{ 99 dl_list_del(&pin->list); 100 wps_free_pin(pin); 101} 102 103 104static void wps_free_pins(struct dl_list *pins) 105{ 106 struct wps_uuid_pin *pin, *prev; 107 dl_list_for_each_safe(pin, prev, pins, struct wps_uuid_pin, list) 108 wps_remove_pin(pin); 109} 110 111 112struct wps_pbc_session { 113 struct wps_pbc_session *next; 114 u8 addr[ETH_ALEN]; 115 u8 uuid_e[WPS_UUID_LEN]; 116 struct os_time timestamp; 117}; 118 119 120static void wps_free_pbc_sessions(struct wps_pbc_session *pbc) 121{ 122 struct wps_pbc_session *prev; 123 124 while (pbc) { 125 prev = pbc; 126 pbc = pbc->next; 127 os_free(prev); 128 } 129} 130 131 132struct wps_registrar_device { 133 struct wps_registrar_device *next; 134 struct wps_device_data dev; 135 u8 uuid[WPS_UUID_LEN]; 136}; 137 138 139struct wps_registrar { 140 struct wps_context *wps; 141 142 int pbc; 143 int selected_registrar; 144 145 int (*new_psk_cb)(void *ctx, const u8 *mac_addr, const u8 *p2p_dev_addr, 146 const u8 *psk, size_t psk_len); 147 int (*set_ie_cb)(void *ctx, struct wpabuf *beacon_ie, 148 struct wpabuf *probe_resp_ie); 149 void (*pin_needed_cb)(void *ctx, const u8 *uuid_e, 150 const struct wps_device_data *dev); 151 void (*reg_success_cb)(void *ctx, const u8 *mac_addr, 152 const u8 *uuid_e, const u8 *dev_pw, 153 size_t dev_pw_len); 154 void (*set_sel_reg_cb)(void *ctx, int sel_reg, u16 dev_passwd_id, 155 u16 sel_reg_config_methods); 156 void (*enrollee_seen_cb)(void *ctx, const u8 *addr, const u8 *uuid_e, 157 const u8 *pri_dev_type, u16 config_methods, 158 u16 dev_password_id, u8 request_type, 159 const char *dev_name); 160 void *cb_ctx; 161 162 struct dl_list pins; 163 struct dl_list nfc_pw_tokens; 164 struct wps_pbc_session *pbc_sessions; 165 166 int skip_cred_build; 167 struct wpabuf *extra_cred; 168 int disable_auto_conf; 169 int sel_reg_union; 170 int sel_reg_dev_password_id_override; 171 int sel_reg_config_methods_override; 172 int static_wep_only; 173 int dualband; 174 int force_per_enrollee_psk; 175 176 struct wps_registrar_device *devices; 177 178 int force_pbc_overlap; 179 180 u8 authorized_macs[WPS_MAX_AUTHORIZED_MACS][ETH_ALEN]; 181 u8 authorized_macs_union[WPS_MAX_AUTHORIZED_MACS][ETH_ALEN]; 182 183 u8 p2p_dev_addr[ETH_ALEN]; 184 185 u8 pbc_ignore_uuid[WPS_UUID_LEN]; 186 struct os_time pbc_ignore_start; 187}; 188 189 190static int wps_set_ie(struct wps_registrar *reg); 191static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx); 192static void wps_registrar_set_selected_timeout(void *eloop_ctx, 193 void *timeout_ctx); 194static void wps_registrar_remove_pin(struct wps_registrar *reg, 195 struct wps_uuid_pin *pin); 196 197 198static void wps_registrar_add_authorized_mac(struct wps_registrar *reg, 199 const u8 *addr) 200{ 201 int i; 202 wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC " MACSTR, 203 MAC2STR(addr)); 204 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++) 205 if (os_memcmp(reg->authorized_macs[i], addr, ETH_ALEN) == 0) { 206 wpa_printf(MSG_DEBUG, "WPS: Authorized MAC was " 207 "already in the list"); 208 return; /* already in list */ 209 } 210 for (i = WPS_MAX_AUTHORIZED_MACS - 1; i > 0; i--) 211 os_memcpy(reg->authorized_macs[i], reg->authorized_macs[i - 1], 212 ETH_ALEN); 213 os_memcpy(reg->authorized_macs[0], addr, ETH_ALEN); 214 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs", 215 (u8 *) reg->authorized_macs, sizeof(reg->authorized_macs)); 216} 217 218 219static void wps_registrar_remove_authorized_mac(struct wps_registrar *reg, 220 const u8 *addr) 221{ 222 int i; 223 wpa_printf(MSG_DEBUG, "WPS: Remove authorized MAC " MACSTR, 224 MAC2STR(addr)); 225 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++) { 226 if (os_memcmp(reg->authorized_macs, addr, ETH_ALEN) == 0) 227 break; 228 } 229 if (i == WPS_MAX_AUTHORIZED_MACS) { 230 wpa_printf(MSG_DEBUG, "WPS: Authorized MAC was not in the " 231 "list"); 232 return; /* not in the list */ 233 } 234 for (; i + 1 < WPS_MAX_AUTHORIZED_MACS; i++) 235 os_memcpy(reg->authorized_macs[i], reg->authorized_macs[i + 1], 236 ETH_ALEN); 237 os_memset(reg->authorized_macs[WPS_MAX_AUTHORIZED_MACS - 1], 0, 238 ETH_ALEN); 239 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs", 240 (u8 *) reg->authorized_macs, sizeof(reg->authorized_macs)); 241} 242 243 244static void wps_free_devices(struct wps_registrar_device *dev) 245{ 246 struct wps_registrar_device *prev; 247 248 while (dev) { 249 prev = dev; 250 dev = dev->next; 251 wps_device_data_free(&prev->dev); 252 os_free(prev); 253 } 254} 255 256 257static struct wps_registrar_device * wps_device_get(struct wps_registrar *reg, 258 const u8 *addr) 259{ 260 struct wps_registrar_device *dev; 261 262 for (dev = reg->devices; dev; dev = dev->next) { 263 if (os_memcmp(dev->dev.mac_addr, addr, ETH_ALEN) == 0) 264 return dev; 265 } 266 return NULL; 267} 268 269 270static void wps_device_clone_data(struct wps_device_data *dst, 271 struct wps_device_data *src) 272{ 273 os_memcpy(dst->mac_addr, src->mac_addr, ETH_ALEN); 274 os_memcpy(dst->pri_dev_type, src->pri_dev_type, WPS_DEV_TYPE_LEN); 275 276#define WPS_STRDUP(n) \ 277 os_free(dst->n); \ 278 dst->n = src->n ? os_strdup(src->n) : NULL 279 280 WPS_STRDUP(device_name); 281 WPS_STRDUP(manufacturer); 282 WPS_STRDUP(model_name); 283 WPS_STRDUP(model_number); 284 WPS_STRDUP(serial_number); 285#undef WPS_STRDUP 286} 287 288 289int wps_device_store(struct wps_registrar *reg, 290 struct wps_device_data *dev, const u8 *uuid) 291{ 292 struct wps_registrar_device *d; 293 294 d = wps_device_get(reg, dev->mac_addr); 295 if (d == NULL) { 296 d = os_zalloc(sizeof(*d)); 297 if (d == NULL) 298 return -1; 299 d->next = reg->devices; 300 reg->devices = d; 301 } 302 303 wps_device_clone_data(&d->dev, dev); 304 os_memcpy(d->uuid, uuid, WPS_UUID_LEN); 305 306 return 0; 307} 308 309 310static void wps_registrar_add_pbc_session(struct wps_registrar *reg, 311 const u8 *addr, const u8 *uuid_e) 312{ 313 struct wps_pbc_session *pbc, *prev = NULL; 314 struct os_time now; 315 316 os_get_time(&now); 317 318 pbc = reg->pbc_sessions; 319 while (pbc) { 320 if (os_memcmp(pbc->addr, addr, ETH_ALEN) == 0 && 321 os_memcmp(pbc->uuid_e, uuid_e, WPS_UUID_LEN) == 0) { 322 if (prev) 323 prev->next = pbc->next; 324 else 325 reg->pbc_sessions = pbc->next; 326 break; 327 } 328 prev = pbc; 329 pbc = pbc->next; 330 } 331 332 if (!pbc) { 333 pbc = os_zalloc(sizeof(*pbc)); 334 if (pbc == NULL) 335 return; 336 os_memcpy(pbc->addr, addr, ETH_ALEN); 337 if (uuid_e) 338 os_memcpy(pbc->uuid_e, uuid_e, WPS_UUID_LEN); 339 } 340 341 pbc->next = reg->pbc_sessions; 342 reg->pbc_sessions = pbc; 343 pbc->timestamp = now; 344 345 /* remove entries that have timed out */ 346 prev = pbc; 347 pbc = pbc->next; 348 349 while (pbc) { 350 if (now.sec > pbc->timestamp.sec + WPS_PBC_WALK_TIME) { 351 prev->next = NULL; 352 wps_free_pbc_sessions(pbc); 353 break; 354 } 355 prev = pbc; 356 pbc = pbc->next; 357 } 358} 359 360 361static void wps_registrar_remove_pbc_session(struct wps_registrar *reg, 362 const u8 *uuid_e, 363 const u8 *p2p_dev_addr) 364{ 365 struct wps_pbc_session *pbc, *prev = NULL, *tmp; 366 367 pbc = reg->pbc_sessions; 368 while (pbc) { 369 if (os_memcmp(pbc->uuid_e, uuid_e, WPS_UUID_LEN) == 0 || 370#ifdef ANDROID_P2P 371 (p2p_dev_addr && !is_zero_ether_addr(pbc->addr) && 372 os_memcmp(pbc->addr, p2p_dev_addr, ETH_ALEN) == 373#else 374 (p2p_dev_addr && !is_zero_ether_addr(reg->p2p_dev_addr) && 375 os_memcmp(reg->p2p_dev_addr, p2p_dev_addr, ETH_ALEN) == 376#endif 377 0)) { 378 if (prev) 379 prev->next = pbc->next; 380 else 381 reg->pbc_sessions = pbc->next; 382 tmp = pbc; 383 pbc = pbc->next; 384 wpa_printf(MSG_DEBUG, "WPS: Removing PBC session for " 385 "addr=" MACSTR, MAC2STR(tmp->addr)); 386 wpa_hexdump(MSG_DEBUG, "WPS: Removed UUID-E", 387 tmp->uuid_e, WPS_UUID_LEN); 388 os_free(tmp); 389 continue; 390 } 391 prev = pbc; 392 pbc = pbc->next; 393 } 394} 395 396 397int wps_registrar_pbc_overlap(struct wps_registrar *reg, 398 const u8 *addr, const u8 *uuid_e) 399{ 400 int count = 0; 401 struct wps_pbc_session *pbc; 402 struct wps_pbc_session *first = NULL; 403 struct os_time now; 404 405 os_get_time(&now); 406 407 wpa_printf(MSG_DEBUG, "WPS: Checking active PBC sessions for overlap"); 408 409 if (uuid_e) { 410 wpa_printf(MSG_DEBUG, "WPS: Add one for the requested UUID"); 411 wpa_hexdump(MSG_DEBUG, "WPS: Requested UUID", 412 uuid_e, WPS_UUID_LEN); 413 count++; 414 } 415 416 for (pbc = reg->pbc_sessions; pbc; pbc = pbc->next) { 417 wpa_printf(MSG_DEBUG, "WPS: Consider PBC session with " MACSTR, 418 MAC2STR(pbc->addr)); 419 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E", 420 pbc->uuid_e, WPS_UUID_LEN); 421 if (now.sec > pbc->timestamp.sec + WPS_PBC_WALK_TIME) { 422 wpa_printf(MSG_DEBUG, "WPS: PBC walk time has " 423 "expired"); 424 break; 425 } 426 if (first && 427 os_memcmp(pbc->uuid_e, first->uuid_e, WPS_UUID_LEN) == 0) { 428 wpa_printf(MSG_DEBUG, "WPS: Same Enrollee"); 429 continue; /* same Enrollee */ 430 } 431 if (uuid_e == NULL || 432 os_memcmp(uuid_e, pbc->uuid_e, WPS_UUID_LEN)) { 433 wpa_printf(MSG_DEBUG, "WPS: New Enrollee"); 434 count++; 435 } 436 if (first == NULL) 437 first = pbc; 438 } 439 440 wpa_printf(MSG_DEBUG, "WPS: %u active PBC session(s) found", count); 441 442 return count > 1 ? 1 : 0; 443} 444 445 446static int wps_build_wps_state(struct wps_context *wps, struct wpabuf *msg) 447{ 448 wpa_printf(MSG_DEBUG, "WPS: * Wi-Fi Protected Setup State (%d)", 449 wps->wps_state); 450 wpabuf_put_be16(msg, ATTR_WPS_STATE); 451 wpabuf_put_be16(msg, 1); 452 wpabuf_put_u8(msg, wps->wps_state); 453 return 0; 454} 455 456 457#ifdef CONFIG_WPS_UPNP 458static void wps_registrar_free_pending_m2(struct wps_context *wps) 459{ 460 struct upnp_pending_message *p, *p2, *prev = NULL; 461 p = wps->upnp_msgs; 462 while (p) { 463 if (p->type == WPS_M2 || p->type == WPS_M2D) { 464 if (prev == NULL) 465 wps->upnp_msgs = p->next; 466 else 467 prev->next = p->next; 468 wpa_printf(MSG_DEBUG, "WPS UPnP: Drop pending M2/M2D"); 469 p2 = p; 470 p = p->next; 471 wpabuf_free(p2->msg); 472 os_free(p2); 473 continue; 474 } 475 prev = p; 476 p = p->next; 477 } 478} 479#endif /* CONFIG_WPS_UPNP */ 480 481 482static int wps_build_ap_setup_locked(struct wps_context *wps, 483 struct wpabuf *msg) 484{ 485 if (wps->ap_setup_locked && wps->ap_setup_locked != 2) { 486 wpa_printf(MSG_DEBUG, "WPS: * AP Setup Locked"); 487 wpabuf_put_be16(msg, ATTR_AP_SETUP_LOCKED); 488 wpabuf_put_be16(msg, 1); 489 wpabuf_put_u8(msg, 1); 490 } 491 return 0; 492} 493 494 495static int wps_build_selected_registrar(struct wps_registrar *reg, 496 struct wpabuf *msg) 497{ 498 if (!reg->sel_reg_union) 499 return 0; 500 wpa_printf(MSG_DEBUG, "WPS: * Selected Registrar"); 501 wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR); 502 wpabuf_put_be16(msg, 1); 503 wpabuf_put_u8(msg, 1); 504 return 0; 505} 506 507 508static int wps_build_sel_reg_dev_password_id(struct wps_registrar *reg, 509 struct wpabuf *msg) 510{ 511 u16 id = reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT; 512 if (!reg->sel_reg_union) 513 return 0; 514 if (reg->sel_reg_dev_password_id_override >= 0) 515 id = reg->sel_reg_dev_password_id_override; 516 wpa_printf(MSG_DEBUG, "WPS: * Device Password ID (%d)", id); 517 wpabuf_put_be16(msg, ATTR_DEV_PASSWORD_ID); 518 wpabuf_put_be16(msg, 2); 519 wpabuf_put_be16(msg, id); 520 return 0; 521} 522 523 524static int wps_build_sel_pbc_reg_uuid_e(struct wps_registrar *reg, 525 struct wpabuf *msg) 526{ 527 u16 id = reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT; 528 if (!reg->sel_reg_union) 529 return 0; 530 if (reg->sel_reg_dev_password_id_override >= 0) 531 id = reg->sel_reg_dev_password_id_override; 532 if (id != DEV_PW_PUSHBUTTON || !reg->dualband) 533 return 0; 534 return wps_build_uuid_e(msg, reg->wps->uuid); 535} 536 537 538static void wps_set_pushbutton(u16 *methods, u16 conf_methods) 539{ 540 *methods |= WPS_CONFIG_PUSHBUTTON; 541#ifdef CONFIG_WPS2 542 if ((conf_methods & WPS_CONFIG_VIRT_PUSHBUTTON) == 543 WPS_CONFIG_VIRT_PUSHBUTTON) 544 *methods |= WPS_CONFIG_VIRT_PUSHBUTTON; 545 if ((conf_methods & WPS_CONFIG_PHY_PUSHBUTTON) == 546 WPS_CONFIG_PHY_PUSHBUTTON) 547 *methods |= WPS_CONFIG_PHY_PUSHBUTTON; 548 if ((*methods & WPS_CONFIG_VIRT_PUSHBUTTON) != 549 WPS_CONFIG_VIRT_PUSHBUTTON && 550 (*methods & WPS_CONFIG_PHY_PUSHBUTTON) != 551 WPS_CONFIG_PHY_PUSHBUTTON) { 552 /* 553 * Required to include virtual/physical flag, but we were not 554 * configured with push button type, so have to default to one 555 * of them. 556 */ 557 *methods |= WPS_CONFIG_PHY_PUSHBUTTON; 558 } 559#endif /* CONFIG_WPS2 */ 560} 561 562 563static int wps_build_sel_reg_config_methods(struct wps_registrar *reg, 564 struct wpabuf *msg) 565{ 566 u16 methods; 567 if (!reg->sel_reg_union) 568 return 0; 569 methods = reg->wps->config_methods; 570 methods &= ~WPS_CONFIG_PUSHBUTTON; 571#ifdef CONFIG_WPS2 572 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 573 WPS_CONFIG_PHY_PUSHBUTTON); 574#endif /* CONFIG_WPS2 */ 575 if (reg->pbc) 576 wps_set_pushbutton(&methods, reg->wps->config_methods); 577 if (reg->sel_reg_config_methods_override >= 0) 578 methods = reg->sel_reg_config_methods_override; 579 wpa_printf(MSG_DEBUG, "WPS: * Selected Registrar Config Methods (%x)", 580 methods); 581 wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR_CONFIG_METHODS); 582 wpabuf_put_be16(msg, 2); 583 wpabuf_put_be16(msg, methods); 584 return 0; 585} 586 587 588static int wps_build_probe_config_methods(struct wps_registrar *reg, 589 struct wpabuf *msg) 590{ 591 u16 methods; 592 /* 593 * These are the methods that the AP supports as an Enrollee for adding 594 * external Registrars. 595 */ 596 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON; 597#ifdef CONFIG_WPS2 598 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 599 WPS_CONFIG_PHY_PUSHBUTTON); 600#endif /* CONFIG_WPS2 */ 601 wpa_printf(MSG_DEBUG, "WPS: * Config Methods (%x)", methods); 602 wpabuf_put_be16(msg, ATTR_CONFIG_METHODS); 603 wpabuf_put_be16(msg, 2); 604 wpabuf_put_be16(msg, methods); 605 return 0; 606} 607 608 609static int wps_build_config_methods_r(struct wps_registrar *reg, 610 struct wpabuf *msg) 611{ 612 return wps_build_config_methods(msg, reg->wps->config_methods); 613} 614 615 616const u8 * wps_authorized_macs(struct wps_registrar *reg, size_t *count) 617{ 618 *count = 0; 619 620#ifdef CONFIG_WPS2 621 while (*count < WPS_MAX_AUTHORIZED_MACS) { 622 if (is_zero_ether_addr(reg->authorized_macs_union[*count])) 623 break; 624 (*count)++; 625 } 626#endif /* CONFIG_WPS2 */ 627 628 return (const u8 *) reg->authorized_macs_union; 629} 630 631 632/** 633 * wps_registrar_init - Initialize WPS Registrar data 634 * @wps: Pointer to longterm WPS context 635 * @cfg: Registrar configuration 636 * Returns: Pointer to allocated Registrar data or %NULL on failure 637 * 638 * This function is used to initialize WPS Registrar functionality. It can be 639 * used for a single Registrar run (e.g., when run in a supplicant) or multiple 640 * runs (e.g., when run as an internal Registrar in an AP). Caller is 641 * responsible for freeing the returned data with wps_registrar_deinit() when 642 * Registrar functionality is not needed anymore. 643 */ 644struct wps_registrar * 645wps_registrar_init(struct wps_context *wps, 646 const struct wps_registrar_config *cfg) 647{ 648 struct wps_registrar *reg = os_zalloc(sizeof(*reg)); 649 if (reg == NULL) 650 return NULL; 651 652 dl_list_init(®->pins); 653 dl_list_init(®->nfc_pw_tokens); 654 reg->wps = wps; 655 reg->new_psk_cb = cfg->new_psk_cb; 656 reg->set_ie_cb = cfg->set_ie_cb; 657 reg->pin_needed_cb = cfg->pin_needed_cb; 658 reg->reg_success_cb = cfg->reg_success_cb; 659 reg->set_sel_reg_cb = cfg->set_sel_reg_cb; 660 reg->enrollee_seen_cb = cfg->enrollee_seen_cb; 661 reg->cb_ctx = cfg->cb_ctx; 662 reg->skip_cred_build = cfg->skip_cred_build; 663 if (cfg->extra_cred) { 664 reg->extra_cred = wpabuf_alloc_copy(cfg->extra_cred, 665 cfg->extra_cred_len); 666 if (reg->extra_cred == NULL) { 667 os_free(reg); 668 return NULL; 669 } 670 } 671 reg->disable_auto_conf = cfg->disable_auto_conf; 672 reg->sel_reg_dev_password_id_override = -1; 673 reg->sel_reg_config_methods_override = -1; 674 reg->static_wep_only = cfg->static_wep_only; 675 reg->dualband = cfg->dualband; 676 reg->force_per_enrollee_psk = cfg->force_per_enrollee_psk; 677 678 if (wps_set_ie(reg)) { 679 wps_registrar_deinit(reg); 680 return NULL; 681 } 682 683 return reg; 684} 685 686 687/** 688 * wps_registrar_deinit - Deinitialize WPS Registrar data 689 * @reg: Registrar data from wps_registrar_init() 690 */ 691void wps_registrar_deinit(struct wps_registrar *reg) 692{ 693 if (reg == NULL) 694 return; 695 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 696 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 697 wps_free_pins(®->pins); 698 wps_free_nfc_pw_tokens(®->nfc_pw_tokens, 0); 699 wps_free_pbc_sessions(reg->pbc_sessions); 700 wpabuf_free(reg->extra_cred); 701 wps_free_devices(reg->devices); 702 os_free(reg); 703} 704 705 706static void wps_registrar_invalidate_unused(struct wps_registrar *reg) 707{ 708 struct wps_uuid_pin *pin; 709 710 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 711 if (pin->wildcard_uuid == 1 && !(pin->flags & PIN_LOCKED)) { 712 wpa_printf(MSG_DEBUG, "WPS: Invalidate previously " 713 "configured wildcard PIN"); 714 wps_registrar_remove_pin(reg, pin); 715 break; 716 } 717 } 718} 719 720 721/** 722 * wps_registrar_add_pin - Configure a new PIN for Registrar 723 * @reg: Registrar data from wps_registrar_init() 724 * @addr: Enrollee MAC address or %NULL if not known 725 * @uuid: UUID-E or %NULL for wildcard (any UUID) 726 * @pin: PIN (Device Password) 727 * @pin_len: Length of pin in octets 728 * @timeout: Time (in seconds) when the PIN will be invalidated; 0 = no timeout 729 * Returns: 0 on success, -1 on failure 730 */ 731int wps_registrar_add_pin(struct wps_registrar *reg, const u8 *addr, 732 const u8 *uuid, const u8 *pin, size_t pin_len, 733 int timeout) 734{ 735 struct wps_uuid_pin *p; 736 737 p = os_zalloc(sizeof(*p)); 738 if (p == NULL) 739 return -1; 740 if (addr) 741 os_memcpy(p->enrollee_addr, addr, ETH_ALEN); 742 if (uuid == NULL) 743 p->wildcard_uuid = 1; 744 else 745 os_memcpy(p->uuid, uuid, WPS_UUID_LEN); 746 p->pin = os_malloc(pin_len); 747 if (p->pin == NULL) { 748 os_free(p); 749 return -1; 750 } 751 os_memcpy(p->pin, pin, pin_len); 752 p->pin_len = pin_len; 753 754 if (timeout) { 755 p->flags |= PIN_EXPIRES; 756 os_get_time(&p->expiration); 757 p->expiration.sec += timeout; 758 } 759 760 if (p->wildcard_uuid) 761 wps_registrar_invalidate_unused(reg); 762 763 dl_list_add(®->pins, &p->list); 764 765 wpa_printf(MSG_DEBUG, "WPS: A new PIN configured (timeout=%d)", 766 timeout); 767 wpa_hexdump(MSG_DEBUG, "WPS: UUID", uuid, WPS_UUID_LEN); 768 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: PIN", pin, pin_len); 769 reg->selected_registrar = 1; 770 reg->pbc = 0; 771 if (addr) 772 wps_registrar_add_authorized_mac(reg, addr); 773 else 774 wps_registrar_add_authorized_mac( 775 reg, (u8 *) "\xff\xff\xff\xff\xff\xff"); 776 wps_registrar_selected_registrar_changed(reg, 0); 777 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 778 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, 779 wps_registrar_set_selected_timeout, 780 reg, NULL); 781 782 return 0; 783} 784 785 786static void wps_registrar_remove_pin(struct wps_registrar *reg, 787 struct wps_uuid_pin *pin) 788{ 789 u8 *addr; 790 u8 bcast[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 791 792 if (is_zero_ether_addr(pin->enrollee_addr)) 793 addr = bcast; 794 else 795 addr = pin->enrollee_addr; 796 wps_registrar_remove_authorized_mac(reg, addr); 797 wps_remove_pin(pin); 798 wps_registrar_selected_registrar_changed(reg, 0); 799} 800 801 802static void wps_registrar_expire_pins(struct wps_registrar *reg) 803{ 804 struct wps_uuid_pin *pin, *prev; 805 struct os_time now; 806 807 os_get_time(&now); 808 dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list) 809 { 810 if ((pin->flags & PIN_EXPIRES) && 811 os_time_before(&pin->expiration, &now)) { 812 wpa_hexdump(MSG_DEBUG, "WPS: Expired PIN for UUID", 813 pin->uuid, WPS_UUID_LEN); 814 wps_registrar_remove_pin(reg, pin); 815 } 816 } 817} 818 819 820/** 821 * wps_registrar_invalidate_wildcard_pin - Invalidate a wildcard PIN 822 * @reg: Registrar data from wps_registrar_init() 823 * @dev_pw: PIN to search for or %NULL to match any 824 * @dev_pw_len: Length of dev_pw in octets 825 * Returns: 0 on success, -1 if not wildcard PIN is enabled 826 */ 827static int wps_registrar_invalidate_wildcard_pin(struct wps_registrar *reg, 828 const u8 *dev_pw, 829 size_t dev_pw_len) 830{ 831 struct wps_uuid_pin *pin, *prev; 832 833 dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list) 834 { 835 if (dev_pw && pin->pin && 836 (dev_pw_len != pin->pin_len || 837 os_memcmp(dev_pw, pin->pin, dev_pw_len) != 0)) 838 continue; /* different PIN */ 839 if (pin->wildcard_uuid) { 840 wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID", 841 pin->uuid, WPS_UUID_LEN); 842 wps_registrar_remove_pin(reg, pin); 843 return 0; 844 } 845 } 846 847 return -1; 848} 849 850 851/** 852 * wps_registrar_invalidate_pin - Invalidate a PIN for a specific UUID-E 853 * @reg: Registrar data from wps_registrar_init() 854 * @uuid: UUID-E 855 * Returns: 0 on success, -1 on failure (e.g., PIN not found) 856 */ 857int wps_registrar_invalidate_pin(struct wps_registrar *reg, const u8 *uuid) 858{ 859 struct wps_uuid_pin *pin, *prev; 860 861 dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list) 862 { 863 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) { 864 wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID", 865 pin->uuid, WPS_UUID_LEN); 866 wps_registrar_remove_pin(reg, pin); 867 return 0; 868 } 869 } 870 871 return -1; 872} 873 874 875static const u8 * wps_registrar_get_pin(struct wps_registrar *reg, 876 const u8 *uuid, size_t *pin_len) 877{ 878 struct wps_uuid_pin *pin, *found = NULL; 879 880 wps_registrar_expire_pins(reg); 881 882 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 883 if (!pin->wildcard_uuid && 884 os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) { 885 found = pin; 886 break; 887 } 888 } 889 890 if (!found) { 891 /* Check for wildcard UUIDs since none of the UUID-specific 892 * PINs matched */ 893 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 894 if (pin->wildcard_uuid == 1 || 895 pin->wildcard_uuid == 2) { 896 wpa_printf(MSG_DEBUG, "WPS: Found a wildcard " 897 "PIN. Assigned it for this UUID-E"); 898 pin->wildcard_uuid++; 899 os_memcpy(pin->uuid, uuid, WPS_UUID_LEN); 900 found = pin; 901 break; 902 } 903 } 904 } 905 906 if (!found) 907 return NULL; 908 909 /* 910 * Lock the PIN to avoid attacks based on concurrent re-use of the PIN 911 * that could otherwise avoid PIN invalidations. 912 */ 913 if (found->flags & PIN_LOCKED) { 914 wpa_printf(MSG_DEBUG, "WPS: Selected PIN locked - do not " 915 "allow concurrent re-use"); 916 return NULL; 917 } 918 *pin_len = found->pin_len; 919 found->flags |= PIN_LOCKED; 920 return found->pin; 921} 922 923 924/** 925 * wps_registrar_unlock_pin - Unlock a PIN for a specific UUID-E 926 * @reg: Registrar data from wps_registrar_init() 927 * @uuid: UUID-E 928 * Returns: 0 on success, -1 on failure 929 * 930 * PINs are locked to enforce only one concurrent use. This function unlocks a 931 * PIN to allow it to be used again. If the specified PIN was configured using 932 * a wildcard UUID, it will be removed instead of allowing multiple uses. 933 */ 934int wps_registrar_unlock_pin(struct wps_registrar *reg, const u8 *uuid) 935{ 936 struct wps_uuid_pin *pin; 937 938 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 939 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) { 940 if (pin->wildcard_uuid == 3) { 941 wpa_printf(MSG_DEBUG, "WPS: Invalidating used " 942 "wildcard PIN"); 943 return wps_registrar_invalidate_pin(reg, uuid); 944 } 945 pin->flags &= ~PIN_LOCKED; 946 return 0; 947 } 948 } 949 950 return -1; 951} 952 953 954static void wps_registrar_stop_pbc(struct wps_registrar *reg) 955{ 956 reg->selected_registrar = 0; 957 reg->pbc = 0; 958 os_memset(reg->p2p_dev_addr, 0, ETH_ALEN); 959 wps_registrar_remove_authorized_mac(reg, 960 (u8 *) "\xff\xff\xff\xff\xff\xff"); 961 wps_registrar_selected_registrar_changed(reg, 0); 962} 963 964 965static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx) 966{ 967 struct wps_registrar *reg = eloop_ctx; 968 969 wpa_printf(MSG_DEBUG, "WPS: PBC timed out - disable PBC mode"); 970 wps_pbc_timeout_event(reg->wps); 971 wps_registrar_stop_pbc(reg); 972} 973 974 975/** 976 * wps_registrar_button_pushed - Notify Registrar that AP button was pushed 977 * @reg: Registrar data from wps_registrar_init() 978 * @p2p_dev_addr: Limit allowed PBC devices to the specified P2P device, %NULL 979 * indicates no such filtering 980 * Returns: 0 on success, -1 on failure, -2 on session overlap 981 * 982 * This function is called on an AP when a push button is pushed to activate 983 * PBC mode. The PBC mode will be stopped after walk time (2 minutes) timeout 984 * or when a PBC registration is completed. If more than one Enrollee in active 985 * PBC mode has been detected during the monitor time (previous 2 minutes), the 986 * PBC mode is not activated and -2 is returned to indicate session overlap. 987 * This is skipped if a specific Enrollee is selected. 988 */ 989int wps_registrar_button_pushed(struct wps_registrar *reg, 990 const u8 *p2p_dev_addr) 991{ 992 if (p2p_dev_addr == NULL && 993 wps_registrar_pbc_overlap(reg, NULL, NULL)) { 994 wpa_printf(MSG_DEBUG, "WPS: PBC overlap - do not start PBC " 995 "mode"); 996 wps_pbc_overlap_event(reg->wps); 997 return -2; 998 } 999 wpa_printf(MSG_DEBUG, "WPS: Button pushed - PBC mode started"); 1000 reg->force_pbc_overlap = 0; 1001 reg->selected_registrar = 1; 1002 reg->pbc = 1; 1003 if (p2p_dev_addr) 1004 os_memcpy(reg->p2p_dev_addr, p2p_dev_addr, ETH_ALEN); 1005 else 1006 os_memset(reg->p2p_dev_addr, 0, ETH_ALEN); 1007 wps_registrar_add_authorized_mac(reg, 1008 (u8 *) "\xff\xff\xff\xff\xff\xff"); 1009 wps_registrar_selected_registrar_changed(reg, 0); 1010 1011 wps_pbc_active_event(reg->wps); 1012 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 1013 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 1014 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wps_registrar_pbc_timeout, 1015 reg, NULL); 1016 return 0; 1017} 1018 1019 1020static void wps_registrar_pbc_completed(struct wps_registrar *reg) 1021{ 1022 wpa_printf(MSG_DEBUG, "WPS: PBC completed - stopping PBC mode"); 1023 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 1024 wps_registrar_stop_pbc(reg); 1025 wps_pbc_disable_event(reg->wps); 1026} 1027 1028 1029static void wps_registrar_pin_completed(struct wps_registrar *reg) 1030{ 1031 wpa_printf(MSG_DEBUG, "WPS: PIN completed using internal Registrar"); 1032 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 1033 reg->selected_registrar = 0; 1034 wps_registrar_selected_registrar_changed(reg, 0); 1035} 1036 1037 1038void wps_registrar_complete(struct wps_registrar *registrar, const u8 *uuid_e, 1039 const u8 *dev_pw, size_t dev_pw_len) 1040{ 1041 if (registrar->pbc) { 1042 wps_registrar_remove_pbc_session(registrar, 1043 uuid_e, NULL); 1044 wps_registrar_pbc_completed(registrar); 1045 os_get_time(®istrar->pbc_ignore_start); 1046 os_memcpy(registrar->pbc_ignore_uuid, uuid_e, WPS_UUID_LEN); 1047 } else { 1048 wps_registrar_pin_completed(registrar); 1049 } 1050 1051 if (dev_pw && 1052 wps_registrar_invalidate_wildcard_pin(registrar, dev_pw, 1053 dev_pw_len) == 0) { 1054 wpa_hexdump_key(MSG_DEBUG, "WPS: Invalidated wildcard PIN", 1055 dev_pw, dev_pw_len); 1056 } 1057} 1058 1059 1060int wps_registrar_wps_cancel(struct wps_registrar *reg) 1061{ 1062 if (reg->pbc) { 1063 wpa_printf(MSG_DEBUG, "WPS: PBC is set - cancelling it"); 1064 wps_registrar_pbc_timeout(reg, NULL); 1065 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 1066 return 1; 1067 } else if (reg->selected_registrar) { 1068 /* PIN Method */ 1069 wpa_printf(MSG_DEBUG, "WPS: PIN is set - cancelling it"); 1070 wps_registrar_pin_completed(reg); 1071 wps_registrar_invalidate_wildcard_pin(reg, NULL, 0); 1072 return 1; 1073 } 1074 return 0; 1075} 1076 1077 1078/** 1079 * wps_registrar_probe_req_rx - Notify Registrar of Probe Request 1080 * @reg: Registrar data from wps_registrar_init() 1081 * @addr: MAC address of the Probe Request sender 1082 * @wps_data: WPS IE contents 1083 * 1084 * This function is called on an AP when a Probe Request with WPS IE is 1085 * received. This is used to track PBC mode use and to detect possible overlap 1086 * situation with other WPS APs. 1087 */ 1088void wps_registrar_probe_req_rx(struct wps_registrar *reg, const u8 *addr, 1089 const struct wpabuf *wps_data, 1090 int p2p_wildcard) 1091{ 1092 struct wps_parse_attr attr; 1093 int skip_add = 0; 1094 1095 wpa_hexdump_buf(MSG_MSGDUMP, 1096 "WPS: Probe Request with WPS data received", 1097 wps_data); 1098 1099 if (wps_parse_msg(wps_data, &attr) < 0) 1100 return; 1101 1102 if (attr.config_methods == NULL) { 1103 wpa_printf(MSG_DEBUG, "WPS: No Config Methods attribute in " 1104 "Probe Request"); 1105 return; 1106 } 1107 1108 if (attr.dev_password_id == NULL) { 1109 wpa_printf(MSG_DEBUG, "WPS: No Device Password Id attribute " 1110 "in Probe Request"); 1111 return; 1112 } 1113 1114 if (reg->enrollee_seen_cb && attr.uuid_e && 1115 attr.primary_dev_type && attr.request_type && !p2p_wildcard) { 1116 char *dev_name = NULL; 1117 if (attr.dev_name) { 1118 dev_name = os_zalloc(attr.dev_name_len + 1); 1119 if (dev_name) { 1120 os_memcpy(dev_name, attr.dev_name, 1121 attr.dev_name_len); 1122 } 1123 } 1124 reg->enrollee_seen_cb(reg->cb_ctx, addr, attr.uuid_e, 1125 attr.primary_dev_type, 1126 WPA_GET_BE16(attr.config_methods), 1127 WPA_GET_BE16(attr.dev_password_id), 1128 *attr.request_type, dev_name); 1129 os_free(dev_name); 1130 } 1131 1132 if (WPA_GET_BE16(attr.dev_password_id) != DEV_PW_PUSHBUTTON) 1133 return; /* Not PBC */ 1134 1135 wpa_printf(MSG_DEBUG, "WPS: Probe Request for PBC received from " 1136 MACSTR, MAC2STR(addr)); 1137 if (attr.uuid_e == NULL) { 1138 wpa_printf(MSG_DEBUG, "WPS: Invalid Probe Request WPS IE: No " 1139 "UUID-E included"); 1140 return; 1141 } 1142 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E from Probe Request", attr.uuid_e, 1143 WPS_UUID_LEN); 1144 1145#ifdef WPS_WORKAROUNDS 1146 if (reg->pbc_ignore_start.sec && 1147 os_memcmp(attr.uuid_e, reg->pbc_ignore_uuid, WPS_UUID_LEN) == 0) { 1148 struct os_time now, dur; 1149 os_get_time(&now); 1150 os_time_sub(&now, ®->pbc_ignore_start, &dur); 1151 if (dur.sec >= 0 && dur.sec < 5) { 1152 wpa_printf(MSG_DEBUG, "WPS: Ignore PBC activation " 1153 "based on Probe Request from the Enrollee " 1154 "that just completed PBC provisioning"); 1155 skip_add = 1; 1156 } else 1157 reg->pbc_ignore_start.sec = 0; 1158 } 1159#endif /* WPS_WORKAROUNDS */ 1160 1161 if (!skip_add) 1162 wps_registrar_add_pbc_session(reg, addr, attr.uuid_e); 1163 if (wps_registrar_pbc_overlap(reg, addr, attr.uuid_e)) { 1164 wpa_printf(MSG_DEBUG, "WPS: PBC session overlap detected"); 1165 reg->force_pbc_overlap = 1; 1166 wps_pbc_overlap_event(reg->wps); 1167 } 1168} 1169 1170 1171static int wps_cb_new_psk(struct wps_registrar *reg, const u8 *mac_addr, 1172 const u8 *p2p_dev_addr, const u8 *psk, size_t psk_len) 1173{ 1174 if (reg->new_psk_cb == NULL) 1175 return 0; 1176 1177 return reg->new_psk_cb(reg->cb_ctx, mac_addr, p2p_dev_addr, psk, 1178 psk_len); 1179} 1180 1181 1182static void wps_cb_pin_needed(struct wps_registrar *reg, const u8 *uuid_e, 1183 const struct wps_device_data *dev) 1184{ 1185 if (reg->pin_needed_cb == NULL) 1186 return; 1187 1188 reg->pin_needed_cb(reg->cb_ctx, uuid_e, dev); 1189} 1190 1191 1192static void wps_cb_reg_success(struct wps_registrar *reg, const u8 *mac_addr, 1193 const u8 *uuid_e, const u8 *dev_pw, 1194 size_t dev_pw_len) 1195{ 1196 if (reg->reg_success_cb == NULL) 1197 return; 1198 1199 reg->reg_success_cb(reg->cb_ctx, mac_addr, uuid_e, dev_pw, dev_pw_len); 1200} 1201 1202 1203static int wps_cb_set_ie(struct wps_registrar *reg, struct wpabuf *beacon_ie, 1204 struct wpabuf *probe_resp_ie) 1205{ 1206 return reg->set_ie_cb(reg->cb_ctx, beacon_ie, probe_resp_ie); 1207} 1208 1209 1210static void wps_cb_set_sel_reg(struct wps_registrar *reg) 1211{ 1212 u16 methods = 0; 1213 if (reg->set_sel_reg_cb == NULL) 1214 return; 1215 1216 if (reg->selected_registrar) { 1217 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON; 1218#ifdef CONFIG_WPS2 1219 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 1220 WPS_CONFIG_PHY_PUSHBUTTON); 1221#endif /* CONFIG_WPS2 */ 1222 if (reg->pbc) 1223 wps_set_pushbutton(&methods, reg->wps->config_methods); 1224 } 1225 1226 wpa_printf(MSG_DEBUG, "WPS: wps_cb_set_sel_reg: sel_reg=%d " 1227 "config_methods=0x%x pbc=%d methods=0x%x", 1228 reg->selected_registrar, reg->wps->config_methods, 1229 reg->pbc, methods); 1230 1231 reg->set_sel_reg_cb(reg->cb_ctx, reg->selected_registrar, 1232 reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT, 1233 methods); 1234} 1235 1236 1237static int wps_set_ie(struct wps_registrar *reg) 1238{ 1239 struct wpabuf *beacon; 1240 struct wpabuf *probe; 1241 const u8 *auth_macs; 1242 size_t count; 1243 size_t vendor_len = 0; 1244 int i; 1245 1246 if (reg->set_ie_cb == NULL) 1247 return 0; 1248 1249 for (i = 0; i < MAX_WPS_VENDOR_EXTENSIONS; i++) { 1250 if (reg->wps->dev.vendor_ext[i]) { 1251 vendor_len += 2 + 2; 1252 vendor_len += wpabuf_len(reg->wps->dev.vendor_ext[i]); 1253 } 1254 } 1255 1256 beacon = wpabuf_alloc(400 + vendor_len); 1257 if (beacon == NULL) 1258 return -1; 1259 probe = wpabuf_alloc(500 + vendor_len); 1260 if (probe == NULL) { 1261 wpabuf_free(beacon); 1262 return -1; 1263 } 1264 1265 auth_macs = wps_authorized_macs(reg, &count); 1266 1267 wpa_printf(MSG_DEBUG, "WPS: Build Beacon IEs"); 1268 1269 if (wps_build_version(beacon) || 1270 wps_build_wps_state(reg->wps, beacon) || 1271 wps_build_ap_setup_locked(reg->wps, beacon) || 1272 wps_build_selected_registrar(reg, beacon) || 1273 wps_build_sel_reg_dev_password_id(reg, beacon) || 1274 wps_build_sel_reg_config_methods(reg, beacon) || 1275 wps_build_sel_pbc_reg_uuid_e(reg, beacon) || 1276 (reg->dualband && wps_build_rf_bands(®->wps->dev, beacon, 0)) || 1277 wps_build_wfa_ext(beacon, 0, auth_macs, count) || 1278 wps_build_vendor_ext(®->wps->dev, beacon)) { 1279 wpabuf_free(beacon); 1280 wpabuf_free(probe); 1281 return -1; 1282 } 1283 1284#ifdef CONFIG_P2P 1285 if (wps_build_dev_name(®->wps->dev, beacon) || 1286 wps_build_primary_dev_type(®->wps->dev, beacon)) { 1287 wpabuf_free(beacon); 1288 wpabuf_free(probe); 1289 return -1; 1290 } 1291#endif /* CONFIG_P2P */ 1292 1293 wpa_printf(MSG_DEBUG, "WPS: Build Probe Response IEs"); 1294 1295 if (wps_build_version(probe) || 1296 wps_build_wps_state(reg->wps, probe) || 1297 wps_build_ap_setup_locked(reg->wps, probe) || 1298 wps_build_selected_registrar(reg, probe) || 1299 wps_build_sel_reg_dev_password_id(reg, probe) || 1300 wps_build_sel_reg_config_methods(reg, probe) || 1301 wps_build_resp_type(probe, reg->wps->ap ? WPS_RESP_AP : 1302 WPS_RESP_REGISTRAR) || 1303 wps_build_uuid_e(probe, reg->wps->uuid) || 1304 wps_build_device_attrs(®->wps->dev, probe) || 1305 wps_build_probe_config_methods(reg, probe) || 1306 (reg->dualband && wps_build_rf_bands(®->wps->dev, probe, 0)) || 1307 wps_build_wfa_ext(probe, 0, auth_macs, count) || 1308 wps_build_vendor_ext(®->wps->dev, probe)) { 1309 wpabuf_free(beacon); 1310 wpabuf_free(probe); 1311 return -1; 1312 } 1313 1314 beacon = wps_ie_encapsulate(beacon); 1315 probe = wps_ie_encapsulate(probe); 1316 1317 if (!beacon || !probe) { 1318 wpabuf_free(beacon); 1319 wpabuf_free(probe); 1320 return -1; 1321 } 1322 1323 if (reg->static_wep_only) { 1324 /* 1325 * Windows XP and Vista clients can get confused about 1326 * EAP-Identity/Request when they probe the network with 1327 * EAPOL-Start. In such a case, they may assume the network is 1328 * using IEEE 802.1X and prompt user for a certificate while 1329 * the correct (non-WPS) behavior would be to ask for the 1330 * static WEP key. As a workaround, use Microsoft Provisioning 1331 * IE to advertise that legacy 802.1X is not supported. 1332 */ 1333 const u8 ms_wps[7] = { 1334 WLAN_EID_VENDOR_SPECIFIC, 5, 1335 /* Microsoft Provisioning IE (00:50:f2:5) */ 1336 0x00, 0x50, 0xf2, 5, 1337 0x00 /* no legacy 802.1X or MS WPS */ 1338 }; 1339 wpa_printf(MSG_DEBUG, "WPS: Add Microsoft Provisioning IE " 1340 "into Beacon/Probe Response frames"); 1341 wpabuf_put_data(beacon, ms_wps, sizeof(ms_wps)); 1342 wpabuf_put_data(probe, ms_wps, sizeof(ms_wps)); 1343 } 1344 1345 return wps_cb_set_ie(reg, beacon, probe); 1346} 1347 1348 1349static int wps_get_dev_password(struct wps_data *wps) 1350{ 1351 const u8 *pin; 1352 size_t pin_len = 0; 1353 1354 os_free(wps->dev_password); 1355 wps->dev_password = NULL; 1356 1357 if (wps->pbc) { 1358 wpa_printf(MSG_DEBUG, "WPS: Use default PIN for PBC"); 1359 pin = (const u8 *) "00000000"; 1360 pin_len = 8; 1361#ifdef CONFIG_WPS_NFC 1362 } else if (wps->nfc_pw_token) { 1363 wpa_printf(MSG_DEBUG, "WPS: Use OOB Device Password from NFC " 1364 "Password Token"); 1365 pin = wps->nfc_pw_token->dev_pw; 1366 pin_len = wps->nfc_pw_token->dev_pw_len; 1367#endif /* CONFIG_WPS_NFC */ 1368 } else { 1369 pin = wps_registrar_get_pin(wps->wps->registrar, wps->uuid_e, 1370 &pin_len); 1371 if (pin && wps->dev_pw_id >= 0x10) { 1372 wpa_printf(MSG_DEBUG, "WPS: No match for OOB Device " 1373 "Password ID, but PIN found"); 1374 /* 1375 * See whether Enrollee is willing to use PIN instead. 1376 */ 1377 wps->dev_pw_id = DEV_PW_DEFAULT; 1378 } 1379 } 1380 if (pin == NULL) { 1381 wpa_printf(MSG_DEBUG, "WPS: No Device Password available for " 1382 "the Enrollee"); 1383 wps_cb_pin_needed(wps->wps->registrar, wps->uuid_e, 1384 &wps->peer_dev); 1385 return -1; 1386 } 1387 1388 wps->dev_password = os_malloc(pin_len); 1389 if (wps->dev_password == NULL) 1390 return -1; 1391 os_memcpy(wps->dev_password, pin, pin_len); 1392 wps->dev_password_len = pin_len; 1393 1394 return 0; 1395} 1396 1397 1398static int wps_build_uuid_r(struct wps_data *wps, struct wpabuf *msg) 1399{ 1400 wpa_printf(MSG_DEBUG, "WPS: * UUID-R"); 1401 wpabuf_put_be16(msg, ATTR_UUID_R); 1402 wpabuf_put_be16(msg, WPS_UUID_LEN); 1403 wpabuf_put_data(msg, wps->uuid_r, WPS_UUID_LEN); 1404 return 0; 1405} 1406 1407 1408static int wps_build_r_hash(struct wps_data *wps, struct wpabuf *msg) 1409{ 1410 u8 *hash; 1411 const u8 *addr[4]; 1412 size_t len[4]; 1413 1414 if (random_get_bytes(wps->snonce, 2 * WPS_SECRET_NONCE_LEN) < 0) 1415 return -1; 1416 wpa_hexdump(MSG_DEBUG, "WPS: R-S1", wps->snonce, WPS_SECRET_NONCE_LEN); 1417 wpa_hexdump(MSG_DEBUG, "WPS: R-S2", 1418 wps->snonce + WPS_SECRET_NONCE_LEN, WPS_SECRET_NONCE_LEN); 1419 1420 if (wps->dh_pubkey_e == NULL || wps->dh_pubkey_r == NULL) { 1421 wpa_printf(MSG_DEBUG, "WPS: DH public keys not available for " 1422 "R-Hash derivation"); 1423 return -1; 1424 } 1425 1426 wpa_printf(MSG_DEBUG, "WPS: * R-Hash1"); 1427 wpabuf_put_be16(msg, ATTR_R_HASH1); 1428 wpabuf_put_be16(msg, SHA256_MAC_LEN); 1429 hash = wpabuf_put(msg, SHA256_MAC_LEN); 1430 /* R-Hash1 = HMAC_AuthKey(R-S1 || PSK1 || PK_E || PK_R) */ 1431 addr[0] = wps->snonce; 1432 len[0] = WPS_SECRET_NONCE_LEN; 1433 addr[1] = wps->psk1; 1434 len[1] = WPS_PSK_LEN; 1435 addr[2] = wpabuf_head(wps->dh_pubkey_e); 1436 len[2] = wpabuf_len(wps->dh_pubkey_e); 1437 addr[3] = wpabuf_head(wps->dh_pubkey_r); 1438 len[3] = wpabuf_len(wps->dh_pubkey_r); 1439 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 1440 wpa_hexdump(MSG_DEBUG, "WPS: R-Hash1", hash, SHA256_MAC_LEN); 1441 1442 wpa_printf(MSG_DEBUG, "WPS: * R-Hash2"); 1443 wpabuf_put_be16(msg, ATTR_R_HASH2); 1444 wpabuf_put_be16(msg, SHA256_MAC_LEN); 1445 hash = wpabuf_put(msg, SHA256_MAC_LEN); 1446 /* R-Hash2 = HMAC_AuthKey(R-S2 || PSK2 || PK_E || PK_R) */ 1447 addr[0] = wps->snonce + WPS_SECRET_NONCE_LEN; 1448 addr[1] = wps->psk2; 1449 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 1450 wpa_hexdump(MSG_DEBUG, "WPS: R-Hash2", hash, SHA256_MAC_LEN); 1451 1452 return 0; 1453} 1454 1455 1456static int wps_build_r_snonce1(struct wps_data *wps, struct wpabuf *msg) 1457{ 1458 wpa_printf(MSG_DEBUG, "WPS: * R-SNonce1"); 1459 wpabuf_put_be16(msg, ATTR_R_SNONCE1); 1460 wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN); 1461 wpabuf_put_data(msg, wps->snonce, WPS_SECRET_NONCE_LEN); 1462 return 0; 1463} 1464 1465 1466static int wps_build_r_snonce2(struct wps_data *wps, struct wpabuf *msg) 1467{ 1468 wpa_printf(MSG_DEBUG, "WPS: * R-SNonce2"); 1469 wpabuf_put_be16(msg, ATTR_R_SNONCE2); 1470 wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN); 1471 wpabuf_put_data(msg, wps->snonce + WPS_SECRET_NONCE_LEN, 1472 WPS_SECRET_NONCE_LEN); 1473 return 0; 1474} 1475 1476 1477static int wps_build_cred_network_idx(struct wpabuf *msg, 1478 const struct wps_credential *cred) 1479{ 1480 wpa_printf(MSG_DEBUG, "WPS: * Network Index (1)"); 1481 wpabuf_put_be16(msg, ATTR_NETWORK_INDEX); 1482 wpabuf_put_be16(msg, 1); 1483 wpabuf_put_u8(msg, 1); 1484 return 0; 1485} 1486 1487 1488static int wps_build_cred_ssid(struct wpabuf *msg, 1489 const struct wps_credential *cred) 1490{ 1491 wpa_printf(MSG_DEBUG, "WPS: * SSID"); 1492 wpa_hexdump_ascii(MSG_DEBUG, "WPS: SSID for Credential", 1493 cred->ssid, cred->ssid_len); 1494 wpabuf_put_be16(msg, ATTR_SSID); 1495 wpabuf_put_be16(msg, cred->ssid_len); 1496 wpabuf_put_data(msg, cred->ssid, cred->ssid_len); 1497 return 0; 1498} 1499 1500 1501static int wps_build_cred_auth_type(struct wpabuf *msg, 1502 const struct wps_credential *cred) 1503{ 1504 wpa_printf(MSG_DEBUG, "WPS: * Authentication Type (0x%x)", 1505 cred->auth_type); 1506 wpabuf_put_be16(msg, ATTR_AUTH_TYPE); 1507 wpabuf_put_be16(msg, 2); 1508 wpabuf_put_be16(msg, cred->auth_type); 1509 return 0; 1510} 1511 1512 1513static int wps_build_cred_encr_type(struct wpabuf *msg, 1514 const struct wps_credential *cred) 1515{ 1516 wpa_printf(MSG_DEBUG, "WPS: * Encryption Type (0x%x)", 1517 cred->encr_type); 1518 wpabuf_put_be16(msg, ATTR_ENCR_TYPE); 1519 wpabuf_put_be16(msg, 2); 1520 wpabuf_put_be16(msg, cred->encr_type); 1521 return 0; 1522} 1523 1524 1525static int wps_build_cred_network_key(struct wpabuf *msg, 1526 const struct wps_credential *cred) 1527{ 1528 wpa_printf(MSG_DEBUG, "WPS: * Network Key (len=%d)", 1529 (int) cred->key_len); 1530 wpa_hexdump_key(MSG_DEBUG, "WPS: Network Key", 1531 cred->key, cred->key_len); 1532 wpabuf_put_be16(msg, ATTR_NETWORK_KEY); 1533 wpabuf_put_be16(msg, cred->key_len); 1534 wpabuf_put_data(msg, cred->key, cred->key_len); 1535 return 0; 1536} 1537 1538 1539static int wps_build_credential(struct wpabuf *msg, 1540 const struct wps_credential *cred) 1541{ 1542 if (wps_build_cred_network_idx(msg, cred) || 1543 wps_build_cred_ssid(msg, cred) || 1544 wps_build_cred_auth_type(msg, cred) || 1545 wps_build_cred_encr_type(msg, cred) || 1546 wps_build_cred_network_key(msg, cred) || 1547 wps_build_mac_addr(msg, cred->mac_addr)) 1548 return -1; 1549 return 0; 1550} 1551 1552 1553int wps_build_credential_wrap(struct wpabuf *msg, 1554 const struct wps_credential *cred) 1555{ 1556 struct wpabuf *wbuf; 1557 wbuf = wpabuf_alloc(200); 1558 if (wbuf == NULL) 1559 return -1; 1560 if (wps_build_credential(wbuf, cred)) { 1561 wpabuf_free(wbuf); 1562 return -1; 1563 } 1564 wpabuf_put_be16(msg, ATTR_CRED); 1565 wpabuf_put_be16(msg, wpabuf_len(wbuf)); 1566 wpabuf_put_buf(msg, wbuf); 1567 wpabuf_free(wbuf); 1568 return 0; 1569} 1570 1571 1572int wps_build_cred(struct wps_data *wps, struct wpabuf *msg) 1573{ 1574 struct wpabuf *cred; 1575 1576 if (wps->wps->registrar->skip_cred_build) 1577 goto skip_cred_build; 1578 1579 wpa_printf(MSG_DEBUG, "WPS: * Credential"); 1580 if (wps->use_cred) { 1581 os_memcpy(&wps->cred, wps->use_cred, sizeof(wps->cred)); 1582 goto use_provided; 1583 } 1584 os_memset(&wps->cred, 0, sizeof(wps->cred)); 1585 1586 os_memcpy(wps->cred.ssid, wps->wps->ssid, wps->wps->ssid_len); 1587 wps->cred.ssid_len = wps->wps->ssid_len; 1588 1589 /* Select the best authentication and encryption type */ 1590 if (wps->auth_type & WPS_AUTH_WPA2PSK) 1591 wps->auth_type = WPS_AUTH_WPA2PSK; 1592 else if (wps->auth_type & WPS_AUTH_WPAPSK) 1593 wps->auth_type = WPS_AUTH_WPAPSK; 1594 else if (wps->auth_type & WPS_AUTH_OPEN) 1595 wps->auth_type = WPS_AUTH_OPEN; 1596 else if (wps->auth_type & WPS_AUTH_SHARED) 1597 wps->auth_type = WPS_AUTH_SHARED; 1598 else { 1599 wpa_printf(MSG_DEBUG, "WPS: Unsupported auth_type 0x%x", 1600 wps->auth_type); 1601 return -1; 1602 } 1603 wps->cred.auth_type = wps->auth_type; 1604 1605 if (wps->auth_type == WPS_AUTH_WPA2PSK || 1606 wps->auth_type == WPS_AUTH_WPAPSK) { 1607 if (wps->encr_type & WPS_ENCR_AES) 1608 wps->encr_type = WPS_ENCR_AES; 1609 else if (wps->encr_type & WPS_ENCR_TKIP) 1610 wps->encr_type = WPS_ENCR_TKIP; 1611 else { 1612 wpa_printf(MSG_DEBUG, "WPS: No suitable encryption " 1613 "type for WPA/WPA2"); 1614 return -1; 1615 } 1616 } else { 1617 if (wps->encr_type & WPS_ENCR_WEP) 1618 wps->encr_type = WPS_ENCR_WEP; 1619 else if (wps->encr_type & WPS_ENCR_NONE) 1620 wps->encr_type = WPS_ENCR_NONE; 1621 else { 1622 wpa_printf(MSG_DEBUG, "WPS: No suitable encryption " 1623 "type for non-WPA/WPA2 mode"); 1624 return -1; 1625 } 1626 } 1627 wps->cred.encr_type = wps->encr_type; 1628 /* 1629 * Set MAC address in the Credential to be the Enrollee's MAC address 1630 */ 1631 os_memcpy(wps->cred.mac_addr, wps->mac_addr_e, ETH_ALEN); 1632 1633 if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->wps->ap && 1634 !wps->wps->registrar->disable_auto_conf) { 1635 u8 r[16]; 1636 /* Generate a random passphrase */ 1637 if (random_get_bytes(r, sizeof(r)) < 0) 1638 return -1; 1639 os_free(wps->new_psk); 1640 wps->new_psk = base64_encode(r, sizeof(r), &wps->new_psk_len); 1641 if (wps->new_psk == NULL) 1642 return -1; 1643 wps->new_psk_len--; /* remove newline */ 1644 while (wps->new_psk_len && 1645 wps->new_psk[wps->new_psk_len - 1] == '=') 1646 wps->new_psk_len--; 1647 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: Generated passphrase", 1648 wps->new_psk, wps->new_psk_len); 1649 os_memcpy(wps->cred.key, wps->new_psk, wps->new_psk_len); 1650 wps->cred.key_len = wps->new_psk_len; 1651 } else if (!wps->wps->registrar->force_per_enrollee_psk && 1652 wps->use_psk_key && wps->wps->psk_set) { 1653 char hex[65]; 1654 wpa_printf(MSG_DEBUG, "WPS: Use PSK format for Network Key"); 1655 wpa_snprintf_hex(hex, sizeof(hex), wps->wps->psk, 32); 1656 os_memcpy(wps->cred.key, hex, 32 * 2); 1657 wps->cred.key_len = 32 * 2; 1658 } else if (!wps->wps->registrar->force_per_enrollee_psk && 1659 wps->wps->network_key) { 1660 os_memcpy(wps->cred.key, wps->wps->network_key, 1661 wps->wps->network_key_len); 1662 wps->cred.key_len = wps->wps->network_key_len; 1663 } else if (wps->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) { 1664 char hex[65]; 1665 /* Generate a random per-device PSK */ 1666 os_free(wps->new_psk); 1667 wps->new_psk_len = 32; 1668 wps->new_psk = os_malloc(wps->new_psk_len); 1669 if (wps->new_psk == NULL) 1670 return -1; 1671 if (random_get_bytes(wps->new_psk, wps->new_psk_len) < 0) { 1672 os_free(wps->new_psk); 1673 wps->new_psk = NULL; 1674 return -1; 1675 } 1676 wpa_hexdump_key(MSG_DEBUG, "WPS: Generated per-device PSK", 1677 wps->new_psk, wps->new_psk_len); 1678 wpa_snprintf_hex(hex, sizeof(hex), wps->new_psk, 1679 wps->new_psk_len); 1680 os_memcpy(wps->cred.key, hex, wps->new_psk_len * 2); 1681 wps->cred.key_len = wps->new_psk_len * 2; 1682 } 1683 1684use_provided: 1685#ifdef CONFIG_WPS_TESTING 1686 if (wps_testing_dummy_cred) 1687 cred = wpabuf_alloc(200); 1688 else 1689 cred = NULL; 1690 if (cred) { 1691 struct wps_credential dummy; 1692 wpa_printf(MSG_DEBUG, "WPS: Add dummy credential"); 1693 os_memset(&dummy, 0, sizeof(dummy)); 1694 os_memcpy(dummy.ssid, "dummy", 5); 1695 dummy.ssid_len = 5; 1696 dummy.auth_type = WPS_AUTH_WPA2PSK; 1697 dummy.encr_type = WPS_ENCR_AES; 1698 os_memcpy(dummy.key, "dummy psk", 9); 1699 dummy.key_len = 9; 1700 os_memcpy(dummy.mac_addr, wps->mac_addr_e, ETH_ALEN); 1701 wps_build_credential(cred, &dummy); 1702 wpa_hexdump_buf(MSG_DEBUG, "WPS: Dummy Credential", cred); 1703 1704 wpabuf_put_be16(msg, ATTR_CRED); 1705 wpabuf_put_be16(msg, wpabuf_len(cred)); 1706 wpabuf_put_buf(msg, cred); 1707 1708 wpabuf_free(cred); 1709 } 1710#endif /* CONFIG_WPS_TESTING */ 1711 1712 cred = wpabuf_alloc(200); 1713 if (cred == NULL) 1714 return -1; 1715 1716 if (wps_build_credential(cred, &wps->cred)) { 1717 wpabuf_free(cred); 1718 return -1; 1719 } 1720 1721 wpabuf_put_be16(msg, ATTR_CRED); 1722 wpabuf_put_be16(msg, wpabuf_len(cred)); 1723 wpabuf_put_buf(msg, cred); 1724 wpabuf_free(cred); 1725 1726skip_cred_build: 1727 if (wps->wps->registrar->extra_cred) { 1728 wpa_printf(MSG_DEBUG, "WPS: * Credential (pre-configured)"); 1729 wpabuf_put_buf(msg, wps->wps->registrar->extra_cred); 1730 } 1731 1732 return 0; 1733} 1734 1735 1736static int wps_build_ap_settings(struct wps_data *wps, struct wpabuf *msg) 1737{ 1738 wpa_printf(MSG_DEBUG, "WPS: * AP Settings"); 1739 1740 if (wps_build_credential(msg, &wps->cred)) 1741 return -1; 1742 1743 return 0; 1744} 1745 1746 1747static struct wpabuf * wps_build_ap_cred(struct wps_data *wps) 1748{ 1749 struct wpabuf *msg, *plain; 1750 1751 msg = wpabuf_alloc(1000); 1752 if (msg == NULL) 1753 return NULL; 1754 1755 plain = wpabuf_alloc(200); 1756 if (plain == NULL) { 1757 wpabuf_free(msg); 1758 return NULL; 1759 } 1760 1761 if (wps_build_ap_settings(wps, plain)) { 1762 wpabuf_free(plain); 1763 wpabuf_free(msg); 1764 return NULL; 1765 } 1766 1767 wpabuf_put_be16(msg, ATTR_CRED); 1768 wpabuf_put_be16(msg, wpabuf_len(plain)); 1769 wpabuf_put_buf(msg, plain); 1770 wpabuf_free(plain); 1771 1772 return msg; 1773} 1774 1775 1776static struct wpabuf * wps_build_m2(struct wps_data *wps) 1777{ 1778 struct wpabuf *msg; 1779 1780 if (random_get_bytes(wps->nonce_r, WPS_NONCE_LEN) < 0) 1781 return NULL; 1782 wpa_hexdump(MSG_DEBUG, "WPS: Registrar Nonce", 1783 wps->nonce_r, WPS_NONCE_LEN); 1784 wpa_hexdump(MSG_DEBUG, "WPS: UUID-R", wps->uuid_r, WPS_UUID_LEN); 1785 1786 wpa_printf(MSG_DEBUG, "WPS: Building Message M2"); 1787 msg = wpabuf_alloc(1000); 1788 if (msg == NULL) 1789 return NULL; 1790 1791 if (wps_build_version(msg) || 1792 wps_build_msg_type(msg, WPS_M2) || 1793 wps_build_enrollee_nonce(wps, msg) || 1794 wps_build_registrar_nonce(wps, msg) || 1795 wps_build_uuid_r(wps, msg) || 1796 wps_build_public_key(wps, msg) || 1797 wps_derive_keys(wps) || 1798 wps_build_auth_type_flags(wps, msg) || 1799 wps_build_encr_type_flags(wps, msg) || 1800 wps_build_conn_type_flags(wps, msg) || 1801 wps_build_config_methods_r(wps->wps->registrar, msg) || 1802 wps_build_device_attrs(&wps->wps->dev, msg) || 1803 wps_build_rf_bands(&wps->wps->dev, msg, 1804 wps->wps->rf_band_cb(wps->wps->cb_ctx)) || 1805 wps_build_assoc_state(wps, msg) || 1806 wps_build_config_error(msg, WPS_CFG_NO_ERROR) || 1807 wps_build_dev_password_id(msg, wps->dev_pw_id) || 1808 wps_build_os_version(&wps->wps->dev, msg) || 1809 wps_build_wfa_ext(msg, 0, NULL, 0) || 1810 wps_build_authenticator(wps, msg)) { 1811 wpabuf_free(msg); 1812 return NULL; 1813 } 1814 1815 wps->int_reg = 1; 1816 wps->state = RECV_M3; 1817 return msg; 1818} 1819 1820 1821static struct wpabuf * wps_build_m2d(struct wps_data *wps) 1822{ 1823 struct wpabuf *msg; 1824 u16 err = wps->config_error; 1825 1826 wpa_printf(MSG_DEBUG, "WPS: Building Message M2D"); 1827 msg = wpabuf_alloc(1000); 1828 if (msg == NULL) 1829 return NULL; 1830 1831 if (wps->wps->ap && wps->wps->ap_setup_locked && 1832 err == WPS_CFG_NO_ERROR) 1833 err = WPS_CFG_SETUP_LOCKED; 1834 1835 if (wps_build_version(msg) || 1836 wps_build_msg_type(msg, WPS_M2D) || 1837 wps_build_enrollee_nonce(wps, msg) || 1838 wps_build_registrar_nonce(wps, msg) || 1839 wps_build_uuid_r(wps, msg) || 1840 wps_build_auth_type_flags(wps, msg) || 1841 wps_build_encr_type_flags(wps, msg) || 1842 wps_build_conn_type_flags(wps, msg) || 1843 wps_build_config_methods_r(wps->wps->registrar, msg) || 1844 wps_build_device_attrs(&wps->wps->dev, msg) || 1845 wps_build_rf_bands(&wps->wps->dev, msg, 1846 wps->wps->rf_band_cb(wps->wps->cb_ctx)) || 1847 wps_build_assoc_state(wps, msg) || 1848 wps_build_config_error(msg, err) || 1849 wps_build_os_version(&wps->wps->dev, msg) || 1850 wps_build_wfa_ext(msg, 0, NULL, 0)) { 1851 wpabuf_free(msg); 1852 return NULL; 1853 } 1854 1855 wps->state = RECV_M2D_ACK; 1856 return msg; 1857} 1858 1859 1860static struct wpabuf * wps_build_m4(struct wps_data *wps) 1861{ 1862 struct wpabuf *msg, *plain; 1863 1864 wpa_printf(MSG_DEBUG, "WPS: Building Message M4"); 1865 1866 wps_derive_psk(wps, wps->dev_password, wps->dev_password_len); 1867 1868 plain = wpabuf_alloc(200); 1869 if (plain == NULL) 1870 return NULL; 1871 1872 msg = wpabuf_alloc(1000); 1873 if (msg == NULL) { 1874 wpabuf_free(plain); 1875 return NULL; 1876 } 1877 1878 if (wps_build_version(msg) || 1879 wps_build_msg_type(msg, WPS_M4) || 1880 wps_build_enrollee_nonce(wps, msg) || 1881 wps_build_r_hash(wps, msg) || 1882 wps_build_r_snonce1(wps, plain) || 1883 wps_build_key_wrap_auth(wps, plain) || 1884 wps_build_encr_settings(wps, msg, plain) || 1885 wps_build_wfa_ext(msg, 0, NULL, 0) || 1886 wps_build_authenticator(wps, msg)) { 1887 wpabuf_free(plain); 1888 wpabuf_free(msg); 1889 return NULL; 1890 } 1891 wpabuf_free(plain); 1892 1893 wps->state = RECV_M5; 1894 return msg; 1895} 1896 1897 1898static struct wpabuf * wps_build_m6(struct wps_data *wps) 1899{ 1900 struct wpabuf *msg, *plain; 1901 1902 wpa_printf(MSG_DEBUG, "WPS: Building Message M6"); 1903 1904 plain = wpabuf_alloc(200); 1905 if (plain == NULL) 1906 return NULL; 1907 1908 msg = wpabuf_alloc(1000); 1909 if (msg == NULL) { 1910 wpabuf_free(plain); 1911 return NULL; 1912 } 1913 1914 if (wps_build_version(msg) || 1915 wps_build_msg_type(msg, WPS_M6) || 1916 wps_build_enrollee_nonce(wps, msg) || 1917 wps_build_r_snonce2(wps, plain) || 1918 wps_build_key_wrap_auth(wps, plain) || 1919 wps_build_encr_settings(wps, msg, plain) || 1920 wps_build_wfa_ext(msg, 0, NULL, 0) || 1921 wps_build_authenticator(wps, msg)) { 1922 wpabuf_free(plain); 1923 wpabuf_free(msg); 1924 return NULL; 1925 } 1926 wpabuf_free(plain); 1927 1928 wps->wps_pin_revealed = 1; 1929 wps->state = RECV_M7; 1930 return msg; 1931} 1932 1933 1934static struct wpabuf * wps_build_m8(struct wps_data *wps) 1935{ 1936 struct wpabuf *msg, *plain; 1937 1938 wpa_printf(MSG_DEBUG, "WPS: Building Message M8"); 1939 1940 plain = wpabuf_alloc(500); 1941 if (plain == NULL) 1942 return NULL; 1943 1944 msg = wpabuf_alloc(1000); 1945 if (msg == NULL) { 1946 wpabuf_free(plain); 1947 return NULL; 1948 } 1949 1950 if (wps_build_version(msg) || 1951 wps_build_msg_type(msg, WPS_M8) || 1952 wps_build_enrollee_nonce(wps, msg) || 1953 ((wps->wps->ap || wps->er) && wps_build_cred(wps, plain)) || 1954 (!wps->wps->ap && !wps->er && wps_build_ap_settings(wps, plain)) || 1955 wps_build_key_wrap_auth(wps, plain) || 1956 wps_build_encr_settings(wps, msg, plain) || 1957 wps_build_wfa_ext(msg, 0, NULL, 0) || 1958 wps_build_authenticator(wps, msg)) { 1959 wpabuf_free(plain); 1960 wpabuf_free(msg); 1961 return NULL; 1962 } 1963 wpabuf_free(plain); 1964 1965 wps->state = RECV_DONE; 1966 return msg; 1967} 1968 1969 1970struct wpabuf * wps_registrar_get_msg(struct wps_data *wps, 1971 enum wsc_op_code *op_code) 1972{ 1973 struct wpabuf *msg; 1974 1975#ifdef CONFIG_WPS_UPNP 1976 if (!wps->int_reg && wps->wps->wps_upnp) { 1977 struct upnp_pending_message *p, *prev = NULL; 1978 if (wps->ext_reg > 1) 1979 wps_registrar_free_pending_m2(wps->wps); 1980 p = wps->wps->upnp_msgs; 1981 /* TODO: check pending message MAC address */ 1982 while (p && p->next) { 1983 prev = p; 1984 p = p->next; 1985 } 1986 if (p) { 1987 wpa_printf(MSG_DEBUG, "WPS: Use pending message from " 1988 "UPnP"); 1989 if (prev) 1990 prev->next = NULL; 1991 else 1992 wps->wps->upnp_msgs = NULL; 1993 msg = p->msg; 1994 switch (p->type) { 1995 case WPS_WSC_ACK: 1996 *op_code = WSC_ACK; 1997 break; 1998 case WPS_WSC_NACK: 1999 *op_code = WSC_NACK; 2000 break; 2001 default: 2002 *op_code = WSC_MSG; 2003 break; 2004 } 2005 os_free(p); 2006 if (wps->ext_reg == 0) 2007 wps->ext_reg = 1; 2008 return msg; 2009 } 2010 } 2011 if (wps->ext_reg) { 2012 wpa_printf(MSG_DEBUG, "WPS: Using external Registrar, but no " 2013 "pending message available"); 2014 return NULL; 2015 } 2016#endif /* CONFIG_WPS_UPNP */ 2017 2018 switch (wps->state) { 2019 case SEND_M2: 2020 if (wps_get_dev_password(wps) < 0) 2021 msg = wps_build_m2d(wps); 2022 else 2023 msg = wps_build_m2(wps); 2024 *op_code = WSC_MSG; 2025 break; 2026 case SEND_M2D: 2027 msg = wps_build_m2d(wps); 2028 *op_code = WSC_MSG; 2029 break; 2030 case SEND_M4: 2031 msg = wps_build_m4(wps); 2032 *op_code = WSC_MSG; 2033 break; 2034 case SEND_M6: 2035 msg = wps_build_m6(wps); 2036 *op_code = WSC_MSG; 2037 break; 2038 case SEND_M8: 2039 msg = wps_build_m8(wps); 2040 *op_code = WSC_MSG; 2041 break; 2042 case RECV_DONE: 2043 msg = wps_build_wsc_ack(wps); 2044 *op_code = WSC_ACK; 2045 break; 2046 case SEND_WSC_NACK: 2047 msg = wps_build_wsc_nack(wps); 2048 *op_code = WSC_NACK; 2049 break; 2050 default: 2051 wpa_printf(MSG_DEBUG, "WPS: Unsupported state %d for building " 2052 "a message", wps->state); 2053 msg = NULL; 2054 break; 2055 } 2056 2057 if (*op_code == WSC_MSG && msg) { 2058 /* Save a copy of the last message for Authenticator derivation 2059 */ 2060 wpabuf_free(wps->last_msg); 2061 wps->last_msg = wpabuf_dup(msg); 2062 } 2063 2064 return msg; 2065} 2066 2067 2068static int wps_process_enrollee_nonce(struct wps_data *wps, const u8 *e_nonce) 2069{ 2070 if (e_nonce == NULL) { 2071 wpa_printf(MSG_DEBUG, "WPS: No Enrollee Nonce received"); 2072 return -1; 2073 } 2074 2075 os_memcpy(wps->nonce_e, e_nonce, WPS_NONCE_LEN); 2076 wpa_hexdump(MSG_DEBUG, "WPS: Enrollee Nonce", 2077 wps->nonce_e, WPS_NONCE_LEN); 2078 2079 return 0; 2080} 2081 2082 2083static int wps_process_registrar_nonce(struct wps_data *wps, const u8 *r_nonce) 2084{ 2085 if (r_nonce == NULL) { 2086 wpa_printf(MSG_DEBUG, "WPS: No Registrar Nonce received"); 2087 return -1; 2088 } 2089 2090 if (os_memcmp(wps->nonce_r, r_nonce, WPS_NONCE_LEN) != 0) { 2091 wpa_printf(MSG_DEBUG, "WPS: Invalid Registrar Nonce received"); 2092 return -1; 2093 } 2094 2095 return 0; 2096} 2097 2098 2099static int wps_process_uuid_e(struct wps_data *wps, const u8 *uuid_e) 2100{ 2101 if (uuid_e == NULL) { 2102 wpa_printf(MSG_DEBUG, "WPS: No UUID-E received"); 2103 return -1; 2104 } 2105 2106 os_memcpy(wps->uuid_e, uuid_e, WPS_UUID_LEN); 2107 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E", wps->uuid_e, WPS_UUID_LEN); 2108 2109 return 0; 2110} 2111 2112 2113static int wps_process_dev_password_id(struct wps_data *wps, const u8 *pw_id) 2114{ 2115 if (pw_id == NULL) { 2116 wpa_printf(MSG_DEBUG, "WPS: No Device Password ID received"); 2117 return -1; 2118 } 2119 2120 wps->dev_pw_id = WPA_GET_BE16(pw_id); 2121 wpa_printf(MSG_DEBUG, "WPS: Device Password ID %d", wps->dev_pw_id); 2122 2123 return 0; 2124} 2125 2126 2127static int wps_process_e_hash1(struct wps_data *wps, const u8 *e_hash1) 2128{ 2129 if (e_hash1 == NULL) { 2130 wpa_printf(MSG_DEBUG, "WPS: No E-Hash1 received"); 2131 return -1; 2132 } 2133 2134 os_memcpy(wps->peer_hash1, e_hash1, WPS_HASH_LEN); 2135 wpa_hexdump(MSG_DEBUG, "WPS: E-Hash1", wps->peer_hash1, WPS_HASH_LEN); 2136 2137 return 0; 2138} 2139 2140 2141static int wps_process_e_hash2(struct wps_data *wps, const u8 *e_hash2) 2142{ 2143 if (e_hash2 == NULL) { 2144 wpa_printf(MSG_DEBUG, "WPS: No E-Hash2 received"); 2145 return -1; 2146 } 2147 2148 os_memcpy(wps->peer_hash2, e_hash2, WPS_HASH_LEN); 2149 wpa_hexdump(MSG_DEBUG, "WPS: E-Hash2", wps->peer_hash2, WPS_HASH_LEN); 2150 2151 return 0; 2152} 2153 2154 2155static int wps_process_e_snonce1(struct wps_data *wps, const u8 *e_snonce1) 2156{ 2157 u8 hash[SHA256_MAC_LEN]; 2158 const u8 *addr[4]; 2159 size_t len[4]; 2160 2161 if (e_snonce1 == NULL) { 2162 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce1 received"); 2163 return -1; 2164 } 2165 2166 wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce1", e_snonce1, 2167 WPS_SECRET_NONCE_LEN); 2168 2169 /* E-Hash1 = HMAC_AuthKey(E-S1 || PSK1 || PK_E || PK_R) */ 2170 addr[0] = e_snonce1; 2171 len[0] = WPS_SECRET_NONCE_LEN; 2172 addr[1] = wps->psk1; 2173 len[1] = WPS_PSK_LEN; 2174 addr[2] = wpabuf_head(wps->dh_pubkey_e); 2175 len[2] = wpabuf_len(wps->dh_pubkey_e); 2176 addr[3] = wpabuf_head(wps->dh_pubkey_r); 2177 len[3] = wpabuf_len(wps->dh_pubkey_r); 2178 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 2179 2180 if (os_memcmp(wps->peer_hash1, hash, WPS_HASH_LEN) != 0) { 2181 wpa_printf(MSG_DEBUG, "WPS: E-Hash1 derived from E-S1 does " 2182 "not match with the pre-committed value"); 2183 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE; 2184 wps_pwd_auth_fail_event(wps->wps, 0, 1, wps->mac_addr_e); 2185 return -1; 2186 } 2187 2188 wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the first " 2189 "half of the device password"); 2190 2191 return 0; 2192} 2193 2194 2195static int wps_process_e_snonce2(struct wps_data *wps, const u8 *e_snonce2) 2196{ 2197 u8 hash[SHA256_MAC_LEN]; 2198 const u8 *addr[4]; 2199 size_t len[4]; 2200 2201 if (e_snonce2 == NULL) { 2202 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce2 received"); 2203 return -1; 2204 } 2205 2206 wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce2", e_snonce2, 2207 WPS_SECRET_NONCE_LEN); 2208 2209 /* E-Hash2 = HMAC_AuthKey(E-S2 || PSK2 || PK_E || PK_R) */ 2210 addr[0] = e_snonce2; 2211 len[0] = WPS_SECRET_NONCE_LEN; 2212 addr[1] = wps->psk2; 2213 len[1] = WPS_PSK_LEN; 2214 addr[2] = wpabuf_head(wps->dh_pubkey_e); 2215 len[2] = wpabuf_len(wps->dh_pubkey_e); 2216 addr[3] = wpabuf_head(wps->dh_pubkey_r); 2217 len[3] = wpabuf_len(wps->dh_pubkey_r); 2218 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 2219 2220 if (os_memcmp(wps->peer_hash2, hash, WPS_HASH_LEN) != 0) { 2221 wpa_printf(MSG_DEBUG, "WPS: E-Hash2 derived from E-S2 does " 2222 "not match with the pre-committed value"); 2223 wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e); 2224 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE; 2225 wps_pwd_auth_fail_event(wps->wps, 0, 2, wps->mac_addr_e); 2226 return -1; 2227 } 2228 2229 wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the second " 2230 "half of the device password"); 2231 wps->wps_pin_revealed = 0; 2232 wps_registrar_unlock_pin(wps->wps->registrar, wps->uuid_e); 2233 2234 /* 2235 * In case wildcard PIN is used and WPS handshake succeeds in the first 2236 * attempt, wps_registrar_unlock_pin() would not free the PIN, so make 2237 * sure the PIN gets invalidated here. 2238 */ 2239 wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e); 2240 2241 return 0; 2242} 2243 2244 2245static int wps_process_mac_addr(struct wps_data *wps, const u8 *mac_addr) 2246{ 2247 if (mac_addr == NULL) { 2248 wpa_printf(MSG_DEBUG, "WPS: No MAC Address received"); 2249 return -1; 2250 } 2251 2252 wpa_printf(MSG_DEBUG, "WPS: Enrollee MAC Address " MACSTR, 2253 MAC2STR(mac_addr)); 2254 os_memcpy(wps->mac_addr_e, mac_addr, ETH_ALEN); 2255 os_memcpy(wps->peer_dev.mac_addr, mac_addr, ETH_ALEN); 2256 2257 return 0; 2258} 2259 2260 2261static int wps_process_pubkey(struct wps_data *wps, const u8 *pk, 2262 size_t pk_len) 2263{ 2264 if (pk == NULL || pk_len == 0) { 2265 wpa_printf(MSG_DEBUG, "WPS: No Public Key received"); 2266 return -1; 2267 } 2268 2269 wpabuf_free(wps->dh_pubkey_e); 2270 wps->dh_pubkey_e = wpabuf_alloc_copy(pk, pk_len); 2271 if (wps->dh_pubkey_e == NULL) 2272 return -1; 2273 2274 return 0; 2275} 2276 2277 2278static int wps_process_auth_type_flags(struct wps_data *wps, const u8 *auth) 2279{ 2280 u16 auth_types; 2281 2282 if (auth == NULL) { 2283 wpa_printf(MSG_DEBUG, "WPS: No Authentication Type flags " 2284 "received"); 2285 return -1; 2286 } 2287 2288 auth_types = WPA_GET_BE16(auth); 2289 2290 wpa_printf(MSG_DEBUG, "WPS: Enrollee Authentication Type flags 0x%x", 2291 auth_types); 2292 wps->auth_type = wps->wps->auth_types & auth_types; 2293 if (wps->auth_type == 0) { 2294 wpa_printf(MSG_DEBUG, "WPS: No match in supported " 2295 "authentication types (own 0x%x Enrollee 0x%x)", 2296 wps->wps->auth_types, auth_types); 2297#ifdef WPS_WORKAROUNDS 2298 /* 2299 * Some deployed implementations seem to advertise incorrect 2300 * information in this attribute. For example, Linksys WRT350N 2301 * seems to have a byteorder bug that breaks this negotiation. 2302 * In order to interoperate with existing implementations, 2303 * assume that the Enrollee supports everything we do. 2304 */ 2305 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee " 2306 "does not advertise supported authentication types " 2307 "correctly"); 2308 wps->auth_type = wps->wps->auth_types; 2309#else /* WPS_WORKAROUNDS */ 2310 return -1; 2311#endif /* WPS_WORKAROUNDS */ 2312 } 2313 2314 return 0; 2315} 2316 2317 2318static int wps_process_encr_type_flags(struct wps_data *wps, const u8 *encr) 2319{ 2320 u16 encr_types; 2321 2322 if (encr == NULL) { 2323 wpa_printf(MSG_DEBUG, "WPS: No Encryption Type flags " 2324 "received"); 2325 return -1; 2326 } 2327 2328 encr_types = WPA_GET_BE16(encr); 2329 2330 wpa_printf(MSG_DEBUG, "WPS: Enrollee Encryption Type flags 0x%x", 2331 encr_types); 2332 wps->encr_type = wps->wps->encr_types & encr_types; 2333 if (wps->encr_type == 0) { 2334 wpa_printf(MSG_DEBUG, "WPS: No match in supported " 2335 "encryption types (own 0x%x Enrollee 0x%x)", 2336 wps->wps->encr_types, encr_types); 2337#ifdef WPS_WORKAROUNDS 2338 /* 2339 * Some deployed implementations seem to advertise incorrect 2340 * information in this attribute. For example, Linksys WRT350N 2341 * seems to have a byteorder bug that breaks this negotiation. 2342 * In order to interoperate with existing implementations, 2343 * assume that the Enrollee supports everything we do. 2344 */ 2345 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee " 2346 "does not advertise supported encryption types " 2347 "correctly"); 2348 wps->encr_type = wps->wps->encr_types; 2349#else /* WPS_WORKAROUNDS */ 2350 return -1; 2351#endif /* WPS_WORKAROUNDS */ 2352 } 2353 2354 return 0; 2355} 2356 2357 2358static int wps_process_conn_type_flags(struct wps_data *wps, const u8 *conn) 2359{ 2360 if (conn == NULL) { 2361 wpa_printf(MSG_DEBUG, "WPS: No Connection Type flags " 2362 "received"); 2363 return -1; 2364 } 2365 2366 wpa_printf(MSG_DEBUG, "WPS: Enrollee Connection Type flags 0x%x", 2367 *conn); 2368 2369 return 0; 2370} 2371 2372 2373static int wps_process_config_methods(struct wps_data *wps, const u8 *methods) 2374{ 2375 u16 m; 2376 2377 if (methods == NULL) { 2378 wpa_printf(MSG_DEBUG, "WPS: No Config Methods received"); 2379 return -1; 2380 } 2381 2382 m = WPA_GET_BE16(methods); 2383 2384 wpa_printf(MSG_DEBUG, "WPS: Enrollee Config Methods 0x%x" 2385 "%s%s%s%s%s%s%s%s%s", m, 2386 m & WPS_CONFIG_USBA ? " [USBA]" : "", 2387 m & WPS_CONFIG_ETHERNET ? " [Ethernet]" : "", 2388 m & WPS_CONFIG_LABEL ? " [Label]" : "", 2389 m & WPS_CONFIG_DISPLAY ? " [Display]" : "", 2390 m & WPS_CONFIG_EXT_NFC_TOKEN ? " [Ext NFC Token]" : "", 2391 m & WPS_CONFIG_INT_NFC_TOKEN ? " [Int NFC Token]" : "", 2392 m & WPS_CONFIG_NFC_INTERFACE ? " [NFC]" : "", 2393 m & WPS_CONFIG_PUSHBUTTON ? " [PBC]" : "", 2394 m & WPS_CONFIG_KEYPAD ? " [Keypad]" : ""); 2395 2396 if (!(m & WPS_CONFIG_DISPLAY) && !wps->use_psk_key) { 2397 /* 2398 * The Enrollee does not have a display so it is unlikely to be 2399 * able to show the passphrase to a user and as such, could 2400 * benefit from receiving PSK to reduce key derivation time. 2401 */ 2402 wpa_printf(MSG_DEBUG, "WPS: Prefer PSK format key due to " 2403 "Enrollee not supporting display"); 2404 wps->use_psk_key = 1; 2405 } 2406 2407 return 0; 2408} 2409 2410 2411static int wps_process_wps_state(struct wps_data *wps, const u8 *state) 2412{ 2413 if (state == NULL) { 2414 wpa_printf(MSG_DEBUG, "WPS: No Wi-Fi Protected Setup State " 2415 "received"); 2416 return -1; 2417 } 2418 2419 wpa_printf(MSG_DEBUG, "WPS: Enrollee Wi-Fi Protected Setup State %d", 2420 *state); 2421 2422 return 0; 2423} 2424 2425 2426static int wps_process_assoc_state(struct wps_data *wps, const u8 *assoc) 2427{ 2428 u16 a; 2429 2430 if (assoc == NULL) { 2431 wpa_printf(MSG_DEBUG, "WPS: No Association State received"); 2432 return -1; 2433 } 2434 2435 a = WPA_GET_BE16(assoc); 2436 wpa_printf(MSG_DEBUG, "WPS: Enrollee Association State %d", a); 2437 2438 return 0; 2439} 2440 2441 2442static int wps_process_config_error(struct wps_data *wps, const u8 *err) 2443{ 2444 u16 e; 2445 2446 if (err == NULL) { 2447 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error received"); 2448 return -1; 2449 } 2450 2451 e = WPA_GET_BE16(err); 2452 wpa_printf(MSG_DEBUG, "WPS: Enrollee Configuration Error %d", e); 2453 2454 return 0; 2455} 2456 2457 2458static int wps_registrar_p2p_dev_addr_match(struct wps_data *wps) 2459{ 2460#ifdef CONFIG_P2P 2461 struct wps_registrar *reg = wps->wps->registrar; 2462 2463 if (is_zero_ether_addr(reg->p2p_dev_addr)) 2464 return 1; /* no filtering in use */ 2465 2466 if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) != 0) { 2467 wpa_printf(MSG_DEBUG, "WPS: No match on P2P Device Address " 2468 "filtering for PBC: expected " MACSTR " was " 2469 MACSTR " - indicate PBC session overlap", 2470 MAC2STR(reg->p2p_dev_addr), 2471 MAC2STR(wps->p2p_dev_addr)); 2472 return 0; 2473 } 2474#endif /* CONFIG_P2P */ 2475 return 1; 2476} 2477 2478 2479static int wps_registrar_skip_overlap(struct wps_data *wps) 2480{ 2481#ifdef CONFIG_P2P 2482 struct wps_registrar *reg = wps->wps->registrar; 2483 2484 if (is_zero_ether_addr(reg->p2p_dev_addr)) 2485 return 0; /* no specific Enrollee selected */ 2486 2487 if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) == 0) { 2488 wpa_printf(MSG_DEBUG, "WPS: Skip PBC overlap due to selected " 2489 "Enrollee match"); 2490 return 1; 2491 } 2492#endif /* CONFIG_P2P */ 2493 return 0; 2494} 2495 2496 2497static enum wps_process_res wps_process_m1(struct wps_data *wps, 2498 struct wps_parse_attr *attr) 2499{ 2500 wpa_printf(MSG_DEBUG, "WPS: Received M1"); 2501 2502 if (wps->state != RECV_M1) { 2503 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2504 "receiving M1", wps->state); 2505 return WPS_FAILURE; 2506 } 2507 2508 if (wps_process_uuid_e(wps, attr->uuid_e) || 2509 wps_process_mac_addr(wps, attr->mac_addr) || 2510 wps_process_enrollee_nonce(wps, attr->enrollee_nonce) || 2511 wps_process_pubkey(wps, attr->public_key, attr->public_key_len) || 2512 wps_process_auth_type_flags(wps, attr->auth_type_flags) || 2513 wps_process_encr_type_flags(wps, attr->encr_type_flags) || 2514 wps_process_conn_type_flags(wps, attr->conn_type_flags) || 2515 wps_process_config_methods(wps, attr->config_methods) || 2516 wps_process_wps_state(wps, attr->wps_state) || 2517 wps_process_device_attrs(&wps->peer_dev, attr) || 2518 wps_process_rf_bands(&wps->peer_dev, attr->rf_bands) || 2519 wps_process_assoc_state(wps, attr->assoc_state) || 2520 wps_process_dev_password_id(wps, attr->dev_password_id) || 2521 wps_process_config_error(wps, attr->config_error) || 2522 wps_process_os_version(&wps->peer_dev, attr->os_version)) 2523 return WPS_FAILURE; 2524 2525 if (wps->dev_pw_id < 0x10 && 2526 wps->dev_pw_id != DEV_PW_DEFAULT && 2527 wps->dev_pw_id != DEV_PW_USER_SPECIFIED && 2528 wps->dev_pw_id != DEV_PW_MACHINE_SPECIFIED && 2529 wps->dev_pw_id != DEV_PW_REGISTRAR_SPECIFIED && 2530 (wps->dev_pw_id != DEV_PW_PUSHBUTTON || 2531 !wps->wps->registrar->pbc)) { 2532 wpa_printf(MSG_DEBUG, "WPS: Unsupported Device Password ID %d", 2533 wps->dev_pw_id); 2534 wps->state = SEND_M2D; 2535 return WPS_CONTINUE; 2536 } 2537 2538#ifdef CONFIG_WPS_NFC 2539 if (wps->dev_pw_id >= 0x10) { 2540 struct wps_nfc_pw_token *token; 2541 const u8 *addr[1]; 2542 u8 hash[WPS_HASH_LEN]; 2543 2544 token = wps_get_nfc_pw_token( 2545 &wps->wps->registrar->nfc_pw_tokens, wps->dev_pw_id); 2546 if (token) { 2547 wpa_printf(MSG_DEBUG, "WPS: Found matching NFC " 2548 "Password Token"); 2549 dl_list_del(&token->list); 2550 wps->nfc_pw_token = token; 2551 2552 addr[0] = attr->public_key; 2553 sha256_vector(1, addr, &attr->public_key_len, hash); 2554 if (os_memcmp(hash, wps->nfc_pw_token->pubkey_hash, 2555 WPS_OOB_PUBKEY_HASH_LEN) != 0) { 2556 wpa_printf(MSG_ERROR, "WPS: Public Key hash " 2557 "mismatch"); 2558 return WPS_FAILURE; 2559 } 2560 } 2561 } 2562#endif /* CONFIG_WPS_NFC */ 2563 2564 if (wps->dev_pw_id == DEV_PW_PUSHBUTTON) { 2565 if ((wps->wps->registrar->force_pbc_overlap || 2566 wps_registrar_pbc_overlap(wps->wps->registrar, 2567 wps->mac_addr_e, wps->uuid_e) || 2568 !wps_registrar_p2p_dev_addr_match(wps)) && 2569 !wps_registrar_skip_overlap(wps)) { 2570 wpa_printf(MSG_DEBUG, "WPS: PBC overlap - deny PBC " 2571 "negotiation"); 2572 wps->state = SEND_M2D; 2573 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2574 wps_pbc_overlap_event(wps->wps); 2575 wps_fail_event(wps->wps, WPS_M1, 2576 WPS_CFG_MULTIPLE_PBC_DETECTED, 2577 WPS_EI_NO_ERROR, wps->mac_addr_e); 2578 wps->wps->registrar->force_pbc_overlap = 1; 2579 return WPS_CONTINUE; 2580 } 2581 wps_registrar_add_pbc_session(wps->wps->registrar, 2582 wps->mac_addr_e, wps->uuid_e); 2583 wps->pbc = 1; 2584 } 2585 2586#ifdef WPS_WORKAROUNDS 2587 /* 2588 * It looks like Mac OS X 10.6.3 and 10.6.4 do not like Network Key in 2589 * passphrase format. To avoid interop issues, force PSK format to be 2590 * used. 2591 */ 2592 if (!wps->use_psk_key && 2593 wps->peer_dev.manufacturer && 2594 os_strncmp(wps->peer_dev.manufacturer, "Apple ", 6) == 0 && 2595 wps->peer_dev.model_name && 2596 os_strcmp(wps->peer_dev.model_name, "AirPort") == 0) { 2597 wpa_printf(MSG_DEBUG, "WPS: Workaround - Force Network Key in " 2598 "PSK format"); 2599 wps->use_psk_key = 1; 2600 } 2601#endif /* WPS_WORKAROUNDS */ 2602 2603 wps->state = SEND_M2; 2604 return WPS_CONTINUE; 2605} 2606 2607 2608static enum wps_process_res wps_process_m3(struct wps_data *wps, 2609 const struct wpabuf *msg, 2610 struct wps_parse_attr *attr) 2611{ 2612 wpa_printf(MSG_DEBUG, "WPS: Received M3"); 2613 2614 if (wps->state != RECV_M3) { 2615 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2616 "receiving M3", wps->state); 2617 wps->state = SEND_WSC_NACK; 2618 return WPS_CONTINUE; 2619 } 2620 2621 if (wps->pbc && wps->wps->registrar->force_pbc_overlap && 2622 !wps_registrar_skip_overlap(wps)) { 2623 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC " 2624 "session overlap"); 2625 wps->state = SEND_WSC_NACK; 2626 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2627 return WPS_CONTINUE; 2628 } 2629 2630 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) || 2631 wps_process_authenticator(wps, attr->authenticator, msg) || 2632 wps_process_e_hash1(wps, attr->e_hash1) || 2633 wps_process_e_hash2(wps, attr->e_hash2)) { 2634 wps->state = SEND_WSC_NACK; 2635 return WPS_CONTINUE; 2636 } 2637 2638 wps->state = SEND_M4; 2639 return WPS_CONTINUE; 2640} 2641 2642 2643static enum wps_process_res wps_process_m5(struct wps_data *wps, 2644 const struct wpabuf *msg, 2645 struct wps_parse_attr *attr) 2646{ 2647 struct wpabuf *decrypted; 2648 struct wps_parse_attr eattr; 2649 2650 wpa_printf(MSG_DEBUG, "WPS: Received M5"); 2651 2652 if (wps->state != RECV_M5) { 2653 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2654 "receiving M5", wps->state); 2655 wps->state = SEND_WSC_NACK; 2656 return WPS_CONTINUE; 2657 } 2658 2659 if (wps->pbc && wps->wps->registrar->force_pbc_overlap && 2660 !wps_registrar_skip_overlap(wps)) { 2661 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC " 2662 "session overlap"); 2663 wps->state = SEND_WSC_NACK; 2664 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2665 return WPS_CONTINUE; 2666 } 2667 2668 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) || 2669 wps_process_authenticator(wps, attr->authenticator, msg)) { 2670 wps->state = SEND_WSC_NACK; 2671 return WPS_CONTINUE; 2672 } 2673 2674 decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings, 2675 attr->encr_settings_len); 2676 if (decrypted == NULL) { 2677 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypted Encrypted " 2678 "Settings attribute"); 2679 wps->state = SEND_WSC_NACK; 2680 return WPS_CONTINUE; 2681 } 2682 2683 if (wps_validate_m5_encr(decrypted, attr->version2 != NULL) < 0) { 2684 wpabuf_free(decrypted); 2685 wps->state = SEND_WSC_NACK; 2686 return WPS_CONTINUE; 2687 } 2688 2689 wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings " 2690 "attribute"); 2691 if (wps_parse_msg(decrypted, &eattr) < 0 || 2692 wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) || 2693 wps_process_e_snonce1(wps, eattr.e_snonce1)) { 2694 wpabuf_free(decrypted); 2695 wps->state = SEND_WSC_NACK; 2696 return WPS_CONTINUE; 2697 } 2698 wpabuf_free(decrypted); 2699 2700 wps->state = SEND_M6; 2701 return WPS_CONTINUE; 2702} 2703 2704 2705static void wps_sta_cred_cb(struct wps_data *wps) 2706{ 2707 /* 2708 * Update credential to only include a single authentication and 2709 * encryption type in case the AP configuration includes more than one 2710 * option. 2711 */ 2712 if (wps->cred.auth_type & WPS_AUTH_WPA2PSK) 2713 wps->cred.auth_type = WPS_AUTH_WPA2PSK; 2714 else if (wps->cred.auth_type & WPS_AUTH_WPAPSK) 2715 wps->cred.auth_type = WPS_AUTH_WPAPSK; 2716 if (wps->cred.encr_type & WPS_ENCR_AES) 2717 wps->cred.encr_type = WPS_ENCR_AES; 2718 else if (wps->cred.encr_type & WPS_ENCR_TKIP) 2719 wps->cred.encr_type = WPS_ENCR_TKIP; 2720 wpa_printf(MSG_DEBUG, "WPS: Update local configuration based on the " 2721 "AP configuration"); 2722 if (wps->wps->cred_cb) 2723 wps->wps->cred_cb(wps->wps->cb_ctx, &wps->cred); 2724} 2725 2726 2727static void wps_cred_update(struct wps_credential *dst, 2728 struct wps_credential *src) 2729{ 2730 os_memcpy(dst->ssid, src->ssid, sizeof(dst->ssid)); 2731 dst->ssid_len = src->ssid_len; 2732 dst->auth_type = src->auth_type; 2733 dst->encr_type = src->encr_type; 2734 dst->key_idx = src->key_idx; 2735 os_memcpy(dst->key, src->key, sizeof(dst->key)); 2736 dst->key_len = src->key_len; 2737} 2738 2739 2740static int wps_process_ap_settings_r(struct wps_data *wps, 2741 struct wps_parse_attr *attr) 2742{ 2743 struct wpabuf *msg; 2744 2745 if (wps->wps->ap || wps->er) 2746 return 0; 2747 2748 /* AP Settings Attributes in M7 when Enrollee is an AP */ 2749 if (wps_process_ap_settings(attr, &wps->cred) < 0) 2750 return -1; 2751 2752 wpa_printf(MSG_INFO, "WPS: Received old AP configuration from AP"); 2753 2754 if (wps->new_ap_settings) { 2755 wpa_printf(MSG_INFO, "WPS: Update AP configuration based on " 2756 "new settings"); 2757 wps_cred_update(&wps->cred, wps->new_ap_settings); 2758 return 0; 2759 } else { 2760 /* 2761 * Use the AP PIN only to receive the current AP settings, not 2762 * to reconfigure the AP. 2763 */ 2764 2765 /* 2766 * Clear selected registrar here since we do not get to 2767 * WSC_Done in this protocol run. 2768 */ 2769 wps_registrar_pin_completed(wps->wps->registrar); 2770 2771 msg = wps_build_ap_cred(wps); 2772 if (msg == NULL) 2773 return -1; 2774 wps->cred.cred_attr = wpabuf_head(msg); 2775 wps->cred.cred_attr_len = wpabuf_len(msg); 2776 2777 if (wps->ap_settings_cb) { 2778 wps->ap_settings_cb(wps->ap_settings_cb_ctx, 2779 &wps->cred); 2780 wpabuf_free(msg); 2781 return 1; 2782 } 2783 wps_sta_cred_cb(wps); 2784 2785 wps->cred.cred_attr = NULL; 2786 wps->cred.cred_attr_len = 0; 2787 wpabuf_free(msg); 2788 2789 return 1; 2790 } 2791} 2792 2793 2794static enum wps_process_res wps_process_m7(struct wps_data *wps, 2795 const struct wpabuf *msg, 2796 struct wps_parse_attr *attr) 2797{ 2798 struct wpabuf *decrypted; 2799 struct wps_parse_attr eattr; 2800 2801 wpa_printf(MSG_DEBUG, "WPS: Received M7"); 2802 2803 if (wps->state != RECV_M7) { 2804 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2805 "receiving M7", wps->state); 2806 wps->state = SEND_WSC_NACK; 2807 return WPS_CONTINUE; 2808 } 2809 2810 if (wps->pbc && wps->wps->registrar->force_pbc_overlap && 2811 !wps_registrar_skip_overlap(wps)) { 2812 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC " 2813 "session overlap"); 2814 wps->state = SEND_WSC_NACK; 2815 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2816 return WPS_CONTINUE; 2817 } 2818 2819 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) || 2820 wps_process_authenticator(wps, attr->authenticator, msg)) { 2821 wps->state = SEND_WSC_NACK; 2822 return WPS_CONTINUE; 2823 } 2824 2825 decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings, 2826 attr->encr_settings_len); 2827 if (decrypted == NULL) { 2828 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypt Encrypted " 2829 "Settings attribute"); 2830 wps->state = SEND_WSC_NACK; 2831 return WPS_CONTINUE; 2832 } 2833 2834 if (wps_validate_m7_encr(decrypted, wps->wps->ap || wps->er, 2835 attr->version2 != NULL) < 0) { 2836 wpabuf_free(decrypted); 2837 wps->state = SEND_WSC_NACK; 2838 return WPS_CONTINUE; 2839 } 2840 2841 wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings " 2842 "attribute"); 2843 if (wps_parse_msg(decrypted, &eattr) < 0 || 2844 wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) || 2845 wps_process_e_snonce2(wps, eattr.e_snonce2) || 2846 wps_process_ap_settings_r(wps, &eattr)) { 2847 wpabuf_free(decrypted); 2848 wps->state = SEND_WSC_NACK; 2849 return WPS_CONTINUE; 2850 } 2851 2852 wpabuf_free(decrypted); 2853 2854 wps->state = SEND_M8; 2855 return WPS_CONTINUE; 2856} 2857 2858 2859static enum wps_process_res wps_process_wsc_msg(struct wps_data *wps, 2860 const struct wpabuf *msg) 2861{ 2862 struct wps_parse_attr attr; 2863 enum wps_process_res ret = WPS_CONTINUE; 2864 2865 wpa_printf(MSG_DEBUG, "WPS: Received WSC_MSG"); 2866 2867 if (wps_parse_msg(msg, &attr) < 0) 2868 return WPS_FAILURE; 2869 2870 if (attr.msg_type == NULL) { 2871 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 2872 wps->state = SEND_WSC_NACK; 2873 return WPS_CONTINUE; 2874 } 2875 2876 if (*attr.msg_type != WPS_M1 && 2877 (attr.registrar_nonce == NULL || 2878 os_memcmp(wps->nonce_r, attr.registrar_nonce, 2879 WPS_NONCE_LEN) != 0)) { 2880 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 2881 return WPS_FAILURE; 2882 } 2883 2884 switch (*attr.msg_type) { 2885 case WPS_M1: 2886 if (wps_validate_m1(msg) < 0) 2887 return WPS_FAILURE; 2888#ifdef CONFIG_WPS_UPNP 2889 if (wps->wps->wps_upnp && attr.mac_addr) { 2890 /* Remove old pending messages when starting new run */ 2891 wps_free_pending_msgs(wps->wps->upnp_msgs); 2892 wps->wps->upnp_msgs = NULL; 2893 2894 upnp_wps_device_send_wlan_event( 2895 wps->wps->wps_upnp, attr.mac_addr, 2896 UPNP_WPS_WLANEVENT_TYPE_EAP, msg); 2897 } 2898#endif /* CONFIG_WPS_UPNP */ 2899 ret = wps_process_m1(wps, &attr); 2900 break; 2901 case WPS_M3: 2902 if (wps_validate_m3(msg) < 0) 2903 return WPS_FAILURE; 2904 ret = wps_process_m3(wps, msg, &attr); 2905 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK) 2906 wps_fail_event(wps->wps, WPS_M3, wps->config_error, 2907 wps->error_indication, wps->mac_addr_e); 2908 break; 2909 case WPS_M5: 2910 if (wps_validate_m5(msg) < 0) 2911 return WPS_FAILURE; 2912 ret = wps_process_m5(wps, msg, &attr); 2913 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK) 2914 wps_fail_event(wps->wps, WPS_M5, wps->config_error, 2915 wps->error_indication, wps->mac_addr_e); 2916 break; 2917 case WPS_M7: 2918 if (wps_validate_m7(msg) < 0) 2919 return WPS_FAILURE; 2920 ret = wps_process_m7(wps, msg, &attr); 2921 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK) 2922 wps_fail_event(wps->wps, WPS_M7, wps->config_error, 2923 wps->error_indication, wps->mac_addr_e); 2924 break; 2925 default: 2926 wpa_printf(MSG_DEBUG, "WPS: Unsupported Message Type %d", 2927 *attr.msg_type); 2928 return WPS_FAILURE; 2929 } 2930 2931 if (ret == WPS_CONTINUE) { 2932 /* Save a copy of the last message for Authenticator derivation 2933 */ 2934 wpabuf_free(wps->last_msg); 2935 wps->last_msg = wpabuf_dup(msg); 2936 } 2937 2938 return ret; 2939} 2940 2941 2942static enum wps_process_res wps_process_wsc_ack(struct wps_data *wps, 2943 const struct wpabuf *msg) 2944{ 2945 struct wps_parse_attr attr; 2946 2947 wpa_printf(MSG_DEBUG, "WPS: Received WSC_ACK"); 2948 2949 if (wps_parse_msg(msg, &attr) < 0) 2950 return WPS_FAILURE; 2951 2952 if (attr.msg_type == NULL) { 2953 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 2954 return WPS_FAILURE; 2955 } 2956 2957 if (*attr.msg_type != WPS_WSC_ACK) { 2958 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d", 2959 *attr.msg_type); 2960 return WPS_FAILURE; 2961 } 2962 2963#ifdef CONFIG_WPS_UPNP 2964 if (wps->wps->wps_upnp && wps->ext_reg && wps->state == RECV_M2D_ACK && 2965 upnp_wps_subscribers(wps->wps->wps_upnp)) { 2966 if (wps->wps->upnp_msgs) 2967 return WPS_CONTINUE; 2968 wpa_printf(MSG_DEBUG, "WPS: Wait for response from an " 2969 "external Registrar"); 2970 return WPS_PENDING; 2971 } 2972#endif /* CONFIG_WPS_UPNP */ 2973 2974 if (attr.registrar_nonce == NULL || 2975 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0) 2976 { 2977 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 2978 return WPS_FAILURE; 2979 } 2980 2981 if (attr.enrollee_nonce == NULL || 2982 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) { 2983 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce"); 2984 return WPS_FAILURE; 2985 } 2986 2987 if (wps->state == RECV_M2D_ACK) { 2988#ifdef CONFIG_WPS_UPNP 2989 if (wps->wps->wps_upnp && 2990 upnp_wps_subscribers(wps->wps->wps_upnp)) { 2991 if (wps->wps->upnp_msgs) 2992 return WPS_CONTINUE; 2993 if (wps->ext_reg == 0) 2994 wps->ext_reg = 1; 2995 wpa_printf(MSG_DEBUG, "WPS: Wait for response from an " 2996 "external Registrar"); 2997 return WPS_PENDING; 2998 } 2999#endif /* CONFIG_WPS_UPNP */ 3000 3001 wpa_printf(MSG_DEBUG, "WPS: No more registrars available - " 3002 "terminate negotiation"); 3003 } 3004 3005 return WPS_FAILURE; 3006} 3007 3008 3009static enum wps_process_res wps_process_wsc_nack(struct wps_data *wps, 3010 const struct wpabuf *msg) 3011{ 3012 struct wps_parse_attr attr; 3013 int old_state; 3014 u16 config_error; 3015 3016 wpa_printf(MSG_DEBUG, "WPS: Received WSC_NACK"); 3017 3018 old_state = wps->state; 3019 wps->state = SEND_WSC_NACK; 3020 3021 if (wps_parse_msg(msg, &attr) < 0) 3022 return WPS_FAILURE; 3023 3024 if (attr.msg_type == NULL) { 3025 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 3026 return WPS_FAILURE; 3027 } 3028 3029 if (*attr.msg_type != WPS_WSC_NACK) { 3030 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d", 3031 *attr.msg_type); 3032 return WPS_FAILURE; 3033 } 3034 3035#ifdef CONFIG_WPS_UPNP 3036 if (wps->wps->wps_upnp && wps->ext_reg) { 3037 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external " 3038 "Registrar terminated by the Enrollee"); 3039 return WPS_FAILURE; 3040 } 3041#endif /* CONFIG_WPS_UPNP */ 3042 3043 if (attr.registrar_nonce == NULL || 3044 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0) 3045 { 3046 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 3047 return WPS_FAILURE; 3048 } 3049 3050 if (attr.enrollee_nonce == NULL || 3051 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) { 3052 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce"); 3053 return WPS_FAILURE; 3054 } 3055 3056 if (attr.config_error == NULL) { 3057 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error attribute " 3058 "in WSC_NACK"); 3059 return WPS_FAILURE; 3060 } 3061 3062 config_error = WPA_GET_BE16(attr.config_error); 3063 wpa_printf(MSG_DEBUG, "WPS: Enrollee terminated negotiation with " 3064 "Configuration Error %d", config_error); 3065 3066 switch (old_state) { 3067 case RECV_M3: 3068 wps_fail_event(wps->wps, WPS_M2, config_error, 3069 wps->error_indication, wps->mac_addr_e); 3070 break; 3071 case RECV_M5: 3072 wps_fail_event(wps->wps, WPS_M4, config_error, 3073 wps->error_indication, wps->mac_addr_e); 3074 break; 3075 case RECV_M7: 3076 wps_fail_event(wps->wps, WPS_M6, config_error, 3077 wps->error_indication, wps->mac_addr_e); 3078 break; 3079 case RECV_DONE: 3080 wps_fail_event(wps->wps, WPS_M8, config_error, 3081 wps->error_indication, wps->mac_addr_e); 3082 break; 3083 default: 3084 break; 3085 } 3086 3087 return WPS_FAILURE; 3088} 3089 3090 3091static enum wps_process_res wps_process_wsc_done(struct wps_data *wps, 3092 const struct wpabuf *msg) 3093{ 3094 struct wps_parse_attr attr; 3095 3096 wpa_printf(MSG_DEBUG, "WPS: Received WSC_Done"); 3097 3098 if (wps->state != RECV_DONE && 3099 (!wps->wps->wps_upnp || !wps->ext_reg)) { 3100 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 3101 "receiving WSC_Done", wps->state); 3102 return WPS_FAILURE; 3103 } 3104 3105 if (wps_parse_msg(msg, &attr) < 0) 3106 return WPS_FAILURE; 3107 3108 if (attr.msg_type == NULL) { 3109 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 3110 return WPS_FAILURE; 3111 } 3112 3113 if (*attr.msg_type != WPS_WSC_DONE) { 3114 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d", 3115 *attr.msg_type); 3116 return WPS_FAILURE; 3117 } 3118 3119#ifdef CONFIG_WPS_UPNP 3120 if (wps->wps->wps_upnp && wps->ext_reg) { 3121 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external " 3122 "Registrar completed successfully"); 3123 wps_device_store(wps->wps->registrar, &wps->peer_dev, 3124 wps->uuid_e); 3125 return WPS_DONE; 3126 } 3127#endif /* CONFIG_WPS_UPNP */ 3128 3129 if (attr.registrar_nonce == NULL || 3130 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0) 3131 { 3132 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 3133 return WPS_FAILURE; 3134 } 3135 3136 if (attr.enrollee_nonce == NULL || 3137 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) { 3138 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce"); 3139 return WPS_FAILURE; 3140 } 3141 3142 wpa_printf(MSG_DEBUG, "WPS: Negotiation completed successfully"); 3143 wps_device_store(wps->wps->registrar, &wps->peer_dev, 3144 wps->uuid_e); 3145 3146 if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->new_psk && 3147 wps->wps->ap && !wps->wps->registrar->disable_auto_conf) { 3148 struct wps_credential cred; 3149 3150 wpa_printf(MSG_DEBUG, "WPS: Moving to Configured state based " 3151 "on first Enrollee connection"); 3152 3153 os_memset(&cred, 0, sizeof(cred)); 3154 os_memcpy(cred.ssid, wps->wps->ssid, wps->wps->ssid_len); 3155 cred.ssid_len = wps->wps->ssid_len; 3156 cred.auth_type = WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK; 3157 cred.encr_type = WPS_ENCR_TKIP | WPS_ENCR_AES; 3158 os_memcpy(cred.key, wps->new_psk, wps->new_psk_len); 3159 cred.key_len = wps->new_psk_len; 3160 3161 wps->wps->wps_state = WPS_STATE_CONFIGURED; 3162 wpa_hexdump_ascii_key(MSG_DEBUG, 3163 "WPS: Generated random passphrase", 3164 wps->new_psk, wps->new_psk_len); 3165 if (wps->wps->cred_cb) 3166 wps->wps->cred_cb(wps->wps->cb_ctx, &cred); 3167 3168 os_free(wps->new_psk); 3169 wps->new_psk = NULL; 3170 } 3171 3172 if (!wps->wps->ap && !wps->er) 3173 wps_sta_cred_cb(wps); 3174 3175 if (wps->new_psk) { 3176 if (wps_cb_new_psk(wps->wps->registrar, wps->mac_addr_e, 3177 wps->p2p_dev_addr, wps->new_psk, 3178 wps->new_psk_len)) { 3179 wpa_printf(MSG_DEBUG, "WPS: Failed to configure the " 3180 "new PSK"); 3181 } 3182 os_free(wps->new_psk); 3183 wps->new_psk = NULL; 3184 } 3185 3186 wps_cb_reg_success(wps->wps->registrar, wps->mac_addr_e, wps->uuid_e, 3187 wps->dev_password, wps->dev_password_len); 3188 3189 if (wps->pbc) { 3190 wps_registrar_remove_pbc_session(wps->wps->registrar, 3191 wps->uuid_e, 3192 wps->p2p_dev_addr); 3193 wps_registrar_pbc_completed(wps->wps->registrar); 3194 os_get_time(&wps->wps->registrar->pbc_ignore_start); 3195 os_memcpy(wps->wps->registrar->pbc_ignore_uuid, wps->uuid_e, 3196 WPS_UUID_LEN); 3197 } else { 3198 wps_registrar_pin_completed(wps->wps->registrar); 3199 } 3200 /* TODO: maintain AuthorizedMACs somewhere separately for each ER and 3201 * merge them into APs own list.. */ 3202 3203 wps_success_event(wps->wps, wps->mac_addr_e); 3204 3205 return WPS_DONE; 3206} 3207 3208 3209enum wps_process_res wps_registrar_process_msg(struct wps_data *wps, 3210 enum wsc_op_code op_code, 3211 const struct wpabuf *msg) 3212{ 3213 enum wps_process_res ret; 3214 3215 wpa_printf(MSG_DEBUG, "WPS: Processing received message (len=%lu " 3216 "op_code=%d)", 3217 (unsigned long) wpabuf_len(msg), op_code); 3218 3219#ifdef CONFIG_WPS_UPNP 3220 if (wps->wps->wps_upnp && op_code == WSC_MSG && wps->ext_reg == 1) { 3221 struct wps_parse_attr attr; 3222 if (wps_parse_msg(msg, &attr) == 0 && attr.msg_type && 3223 *attr.msg_type == WPS_M3) 3224 wps->ext_reg = 2; /* past M2/M2D phase */ 3225 } 3226 if (wps->ext_reg > 1) 3227 wps_registrar_free_pending_m2(wps->wps); 3228 if (wps->wps->wps_upnp && wps->ext_reg && 3229 wps->wps->upnp_msgs == NULL && 3230 (op_code == WSC_MSG || op_code == WSC_Done || op_code == WSC_NACK)) 3231 { 3232 struct wps_parse_attr attr; 3233 int type; 3234 if (wps_parse_msg(msg, &attr) < 0 || attr.msg_type == NULL) 3235 type = -1; 3236 else 3237 type = *attr.msg_type; 3238 wpa_printf(MSG_DEBUG, "WPS: Sending received message (type %d)" 3239 " to external Registrar for processing", type); 3240 upnp_wps_device_send_wlan_event(wps->wps->wps_upnp, 3241 wps->mac_addr_e, 3242 UPNP_WPS_WLANEVENT_TYPE_EAP, 3243 msg); 3244 if (op_code == WSC_MSG) 3245 return WPS_PENDING; 3246 } else if (wps->wps->wps_upnp && wps->ext_reg && op_code == WSC_MSG) { 3247 wpa_printf(MSG_DEBUG, "WPS: Skip internal processing - using " 3248 "external Registrar"); 3249 return WPS_CONTINUE; 3250 } 3251#endif /* CONFIG_WPS_UPNP */ 3252 3253 switch (op_code) { 3254 case WSC_MSG: 3255 return wps_process_wsc_msg(wps, msg); 3256 case WSC_ACK: 3257 if (wps_validate_wsc_ack(msg) < 0) 3258 return WPS_FAILURE; 3259 return wps_process_wsc_ack(wps, msg); 3260 case WSC_NACK: 3261 if (wps_validate_wsc_nack(msg) < 0) 3262 return WPS_FAILURE; 3263 return wps_process_wsc_nack(wps, msg); 3264 case WSC_Done: 3265 if (wps_validate_wsc_done(msg) < 0) 3266 return WPS_FAILURE; 3267 ret = wps_process_wsc_done(wps, msg); 3268 if (ret == WPS_FAILURE) { 3269 wps->state = SEND_WSC_NACK; 3270 wps_fail_event(wps->wps, WPS_WSC_DONE, 3271 wps->config_error, 3272 wps->error_indication, wps->mac_addr_e); 3273 } 3274 return ret; 3275 default: 3276 wpa_printf(MSG_DEBUG, "WPS: Unsupported op_code %d", op_code); 3277 return WPS_FAILURE; 3278 } 3279} 3280 3281 3282int wps_registrar_update_ie(struct wps_registrar *reg) 3283{ 3284 return wps_set_ie(reg); 3285} 3286 3287 3288static void wps_registrar_set_selected_timeout(void *eloop_ctx, 3289 void *timeout_ctx) 3290{ 3291 struct wps_registrar *reg = eloop_ctx; 3292 3293 wpa_printf(MSG_DEBUG, "WPS: Selected Registrar timeout - " 3294 "unselect internal Registrar"); 3295 reg->selected_registrar = 0; 3296 reg->pbc = 0; 3297 wps_registrar_selected_registrar_changed(reg, 0); 3298} 3299 3300 3301#ifdef CONFIG_WPS_UPNP 3302static void wps_registrar_sel_reg_add(struct wps_registrar *reg, 3303 struct subscription *s) 3304{ 3305 int i, j; 3306 wpa_printf(MSG_DEBUG, "WPS: External Registrar selected (dev_pw_id=%d " 3307 "config_methods=0x%x)", 3308 s->dev_password_id, s->config_methods); 3309 reg->sel_reg_union = 1; 3310 if (reg->sel_reg_dev_password_id_override != DEV_PW_PUSHBUTTON) 3311 reg->sel_reg_dev_password_id_override = s->dev_password_id; 3312 if (reg->sel_reg_config_methods_override == -1) 3313 reg->sel_reg_config_methods_override = 0; 3314 reg->sel_reg_config_methods_override |= s->config_methods; 3315 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++) 3316 if (is_zero_ether_addr(reg->authorized_macs_union[i])) 3317 break; 3318 for (j = 0; i < WPS_MAX_AUTHORIZED_MACS && j < WPS_MAX_AUTHORIZED_MACS; 3319 j++) { 3320 if (is_zero_ether_addr(s->authorized_macs[j])) 3321 break; 3322 wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC into union: " 3323 MACSTR, MAC2STR(s->authorized_macs[j])); 3324 os_memcpy(reg->authorized_macs_union[i], 3325 s->authorized_macs[j], ETH_ALEN); 3326 i++; 3327 } 3328 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union", 3329 (u8 *) reg->authorized_macs_union, 3330 sizeof(reg->authorized_macs_union)); 3331} 3332#endif /* CONFIG_WPS_UPNP */ 3333 3334 3335static void wps_registrar_sel_reg_union(struct wps_registrar *reg) 3336{ 3337#ifdef CONFIG_WPS_UPNP 3338 struct subscription *s; 3339 3340 if (reg->wps->wps_upnp == NULL) 3341 return; 3342 3343 dl_list_for_each(s, ®->wps->wps_upnp->subscriptions, 3344 struct subscription, list) { 3345 struct subscr_addr *sa; 3346 sa = dl_list_first(&s->addr_list, struct subscr_addr, list); 3347 if (sa) { 3348 wpa_printf(MSG_DEBUG, "WPS: External Registrar %s:%d", 3349 inet_ntoa(sa->saddr.sin_addr), 3350 ntohs(sa->saddr.sin_port)); 3351 } 3352 if (s->selected_registrar) 3353 wps_registrar_sel_reg_add(reg, s); 3354 else 3355 wpa_printf(MSG_DEBUG, "WPS: External Registrar not " 3356 "selected"); 3357 } 3358#endif /* CONFIG_WPS_UPNP */ 3359} 3360 3361 3362/** 3363 * wps_registrar_selected_registrar_changed - SetSelectedRegistrar change 3364 * @reg: Registrar data from wps_registrar_init() 3365 * 3366 * This function is called when selected registrar state changes, e.g., when an 3367 * AP receives a SetSelectedRegistrar UPnP message. 3368 */ 3369void wps_registrar_selected_registrar_changed(struct wps_registrar *reg, 3370 u16 dev_pw_id) 3371{ 3372 wpa_printf(MSG_DEBUG, "WPS: Selected registrar information changed"); 3373 3374 reg->sel_reg_union = reg->selected_registrar; 3375 reg->sel_reg_dev_password_id_override = -1; 3376 reg->sel_reg_config_methods_override = -1; 3377 os_memcpy(reg->authorized_macs_union, reg->authorized_macs, 3378 WPS_MAX_AUTHORIZED_MACS * ETH_ALEN); 3379 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union (start with own)", 3380 (u8 *) reg->authorized_macs_union, 3381 sizeof(reg->authorized_macs_union)); 3382 if (reg->selected_registrar) { 3383 u16 methods; 3384 3385 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON; 3386#ifdef CONFIG_WPS2 3387 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 3388 WPS_CONFIG_PHY_PUSHBUTTON); 3389#endif /* CONFIG_WPS2 */ 3390 if (reg->pbc) { 3391 reg->sel_reg_dev_password_id_override = 3392 DEV_PW_PUSHBUTTON; 3393 wps_set_pushbutton(&methods, reg->wps->config_methods); 3394 } else if (dev_pw_id) 3395 reg->sel_reg_dev_password_id_override = dev_pw_id; 3396 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar selected " 3397 "(pbc=%d)", reg->pbc); 3398 reg->sel_reg_config_methods_override = methods; 3399 } else 3400 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar not selected"); 3401 3402 wps_registrar_sel_reg_union(reg); 3403 3404 wps_set_ie(reg); 3405 wps_cb_set_sel_reg(reg); 3406} 3407 3408 3409int wps_registrar_get_info(struct wps_registrar *reg, const u8 *addr, 3410 char *buf, size_t buflen) 3411{ 3412 struct wps_registrar_device *d; 3413 int len = 0, ret; 3414 char uuid[40]; 3415 char devtype[WPS_DEV_TYPE_BUFSIZE]; 3416 3417 d = wps_device_get(reg, addr); 3418 if (d == NULL) 3419 return 0; 3420 if (uuid_bin2str(d->uuid, uuid, sizeof(uuid))) 3421 return 0; 3422 3423 ret = os_snprintf(buf + len, buflen - len, 3424 "wpsUuid=%s\n" 3425 "wpsPrimaryDeviceType=%s\n" 3426 "wpsDeviceName=%s\n" 3427 "wpsManufacturer=%s\n" 3428 "wpsModelName=%s\n" 3429 "wpsModelNumber=%s\n" 3430 "wpsSerialNumber=%s\n", 3431 uuid, 3432 wps_dev_type_bin2str(d->dev.pri_dev_type, devtype, 3433 sizeof(devtype)), 3434 d->dev.device_name ? d->dev.device_name : "", 3435 d->dev.manufacturer ? d->dev.manufacturer : "", 3436 d->dev.model_name ? d->dev.model_name : "", 3437 d->dev.model_number ? d->dev.model_number : "", 3438 d->dev.serial_number ? d->dev.serial_number : ""); 3439 if (ret < 0 || (size_t) ret >= buflen - len) 3440 return len; 3441 len += ret; 3442 3443 return len; 3444} 3445 3446 3447int wps_registrar_config_ap(struct wps_registrar *reg, 3448 struct wps_credential *cred) 3449{ 3450#ifdef CONFIG_WPS2 3451 printf("encr_type=0x%x\n", cred->encr_type); 3452 if (!(cred->encr_type & (WPS_ENCR_NONE | WPS_ENCR_TKIP | 3453 WPS_ENCR_AES))) { 3454 if (cred->encr_type & WPS_ENCR_WEP) { 3455 wpa_printf(MSG_INFO, "WPS: Reject new AP settings " 3456 "due to WEP configuration"); 3457 return -1; 3458 } 3459 3460 wpa_printf(MSG_INFO, "WPS: Reject new AP settings due to " 3461 "invalid encr_type 0x%x", cred->encr_type); 3462 return -1; 3463 } 3464 3465 if ((cred->encr_type & (WPS_ENCR_TKIP | WPS_ENCR_AES)) == 3466 WPS_ENCR_TKIP) { 3467 wpa_printf(MSG_DEBUG, "WPS: Upgrade encr_type TKIP -> " 3468 "TKIP+AES"); 3469 cred->encr_type |= WPS_ENCR_AES; 3470 } 3471 3472 if ((cred->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) == 3473 WPS_AUTH_WPAPSK) { 3474 wpa_printf(MSG_DEBUG, "WPS: Upgrade auth_type WPAPSK -> " 3475 "WPAPSK+WPA2PSK"); 3476 cred->auth_type |= WPS_AUTH_WPA2PSK; 3477 } 3478#endif /* CONFIG_WPS2 */ 3479 3480 if (reg->wps->cred_cb) 3481 return reg->wps->cred_cb(reg->wps->cb_ctx, cred); 3482 3483 return -1; 3484} 3485 3486 3487#ifdef CONFIG_WPS_NFC 3488 3489int wps_registrar_add_nfc_pw_token(struct wps_registrar *reg, 3490 const u8 *pubkey_hash, u16 pw_id, 3491 const u8 *dev_pw, size_t dev_pw_len) 3492{ 3493 struct wps_nfc_pw_token *token; 3494 3495 if (dev_pw_len > WPS_OOB_DEVICE_PASSWORD_LEN) 3496 return -1; 3497 3498 wps_free_nfc_pw_tokens(®->nfc_pw_tokens, pw_id); 3499 3500 token = os_zalloc(sizeof(*token)); 3501 if (token == NULL) 3502 return -1; 3503 3504 os_memcpy(token->pubkey_hash, pubkey_hash, WPS_OOB_PUBKEY_HASH_LEN); 3505 token->pw_id = pw_id; 3506 wpa_snprintf_hex_uppercase((char *) token->dev_pw, 3507 sizeof(token->dev_pw), 3508 dev_pw, dev_pw_len); 3509 token->dev_pw_len = dev_pw_len * 2; 3510 3511 dl_list_add(®->nfc_pw_tokens, &token->list); 3512 3513 reg->selected_registrar = 1; 3514 reg->pbc = 0; 3515 wps_registrar_add_authorized_mac(reg, 3516 (u8 *) "\xff\xff\xff\xff\xff\xff"); 3517 wps_registrar_selected_registrar_changed(reg, pw_id); 3518 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 3519 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, 3520 wps_registrar_set_selected_timeout, 3521 reg, NULL); 3522 3523 wpa_printf(MSG_DEBUG, "WPS: Added NFC Device Password %u to Registrar", 3524 pw_id); 3525 3526 return 0; 3527} 3528 3529 3530int wps_registrar_add_nfc_password_token(struct wps_registrar *reg, 3531 const u8 *oob_dev_pw, 3532 size_t oob_dev_pw_len) 3533{ 3534 const u8 *pos, *hash, *dev_pw; 3535 u16 id; 3536 size_t dev_pw_len; 3537 3538 if (oob_dev_pw_len < WPS_OOB_PUBKEY_HASH_LEN + 2 + 3539 WPS_OOB_DEVICE_PASSWORD_MIN_LEN || 3540 oob_dev_pw_len > WPS_OOB_PUBKEY_HASH_LEN + 2 + 3541 WPS_OOB_DEVICE_PASSWORD_LEN) 3542 return -1; 3543 3544 hash = oob_dev_pw; 3545 pos = oob_dev_pw + WPS_OOB_PUBKEY_HASH_LEN; 3546 id = WPA_GET_BE16(pos); 3547 dev_pw = pos + 2; 3548 dev_pw_len = oob_dev_pw + oob_dev_pw_len - dev_pw; 3549 3550 wpa_printf(MSG_DEBUG, "WPS: Add NFC Password Token for Password ID %u", 3551 id); 3552 3553 wpa_hexdump(MSG_DEBUG, "WPS: Public Key Hash", 3554 hash, WPS_OOB_PUBKEY_HASH_LEN); 3555 wpa_hexdump_key(MSG_DEBUG, "WPS: Device Password", dev_pw, dev_pw_len); 3556 3557 return wps_registrar_add_nfc_pw_token(reg, hash, id, dev_pw, 3558 dev_pw_len); 3559} 3560 3561 3562void wps_registrar_remove_nfc_pw_token(struct wps_registrar *reg, 3563 struct wps_nfc_pw_token *token) 3564{ 3565 wps_registrar_remove_authorized_mac(reg, 3566 (u8 *) "\xff\xff\xff\xff\xff\xff"); 3567 wps_registrar_selected_registrar_changed(reg, 0); 3568} 3569 3570#endif /* CONFIG_WPS_NFC */ 3571