wps_registrar.c revision 346981
1/* 2 * Wi-Fi Protected Setup - Registrar 3 * Copyright (c) 2008-2016, Jouni Malinen <j@w1.fi> 4 * 5 * This software may be distributed under the terms of the BSD license. 6 * See README for more details. 7 */ 8 9#include "utils/includes.h" 10 11#include "utils/common.h" 12#include "utils/base64.h" 13#include "utils/eloop.h" 14#include "utils/uuid.h" 15#include "utils/list.h" 16#include "crypto/crypto.h" 17#include "crypto/sha256.h" 18#include "crypto/random.h" 19#include "common/ieee802_11_defs.h" 20#include "wps_i.h" 21#include "wps_dev_attr.h" 22#include "wps_upnp.h" 23#include "wps_upnp_i.h" 24 25#ifndef CONFIG_WPS_STRICT 26#define WPS_WORKAROUNDS 27#endif /* CONFIG_WPS_STRICT */ 28 29#ifdef CONFIG_WPS_NFC 30 31struct wps_nfc_pw_token { 32 struct dl_list list; 33 u8 pubkey_hash[WPS_OOB_PUBKEY_HASH_LEN]; 34 unsigned int peer_pk_hash_known:1; 35 u16 pw_id; 36 u8 dev_pw[WPS_OOB_DEVICE_PASSWORD_LEN * 2 + 1]; 37 size_t dev_pw_len; 38 int pk_hash_provided_oob; /* whether own PK hash was provided OOB */ 39}; 40 41 42static void wps_remove_nfc_pw_token(struct wps_nfc_pw_token *token) 43{ 44 dl_list_del(&token->list); 45 bin_clear_free(token, sizeof(*token)); 46} 47 48 49static void wps_free_nfc_pw_tokens(struct dl_list *tokens, u16 pw_id) 50{ 51 struct wps_nfc_pw_token *token, *prev; 52 dl_list_for_each_safe(token, prev, tokens, struct wps_nfc_pw_token, 53 list) { 54 if (pw_id == 0 || pw_id == token->pw_id) 55 wps_remove_nfc_pw_token(token); 56 } 57} 58 59 60static struct wps_nfc_pw_token * wps_get_nfc_pw_token(struct dl_list *tokens, 61 u16 pw_id) 62{ 63 struct wps_nfc_pw_token *token; 64 dl_list_for_each(token, tokens, struct wps_nfc_pw_token, list) { 65 if (pw_id == token->pw_id) 66 return token; 67 } 68 return NULL; 69} 70 71#else /* CONFIG_WPS_NFC */ 72 73#define wps_free_nfc_pw_tokens(t, p) do { } while (0) 74 75#endif /* CONFIG_WPS_NFC */ 76 77 78struct wps_uuid_pin { 79 struct dl_list list; 80 u8 uuid[WPS_UUID_LEN]; 81 int wildcard_uuid; 82 u8 *pin; 83 size_t pin_len; 84#define PIN_LOCKED BIT(0) 85#define PIN_EXPIRES BIT(1) 86 int flags; 87 struct os_reltime expiration; 88 u8 enrollee_addr[ETH_ALEN]; 89}; 90 91 92static void wps_free_pin(struct wps_uuid_pin *pin) 93{ 94 bin_clear_free(pin->pin, pin->pin_len); 95 os_free(pin); 96} 97 98 99static void wps_remove_pin(struct wps_uuid_pin *pin) 100{ 101 dl_list_del(&pin->list); 102 wps_free_pin(pin); 103} 104 105 106static void wps_free_pins(struct dl_list *pins) 107{ 108 struct wps_uuid_pin *pin, *prev; 109 dl_list_for_each_safe(pin, prev, pins, struct wps_uuid_pin, list) 110 wps_remove_pin(pin); 111} 112 113 114struct wps_pbc_session { 115 struct wps_pbc_session *next; 116 u8 addr[ETH_ALEN]; 117 u8 uuid_e[WPS_UUID_LEN]; 118 struct os_reltime timestamp; 119}; 120 121 122static void wps_free_pbc_sessions(struct wps_pbc_session *pbc) 123{ 124 struct wps_pbc_session *prev; 125 126 while (pbc) { 127 prev = pbc; 128 pbc = pbc->next; 129 os_free(prev); 130 } 131} 132 133 134struct wps_registrar_device { 135 struct wps_registrar_device *next; 136 struct wps_device_data dev; 137 u8 uuid[WPS_UUID_LEN]; 138}; 139 140 141struct wps_registrar { 142 struct wps_context *wps; 143 144 int pbc; 145 int selected_registrar; 146 147 int (*new_psk_cb)(void *ctx, const u8 *mac_addr, const u8 *p2p_dev_addr, 148 const u8 *psk, size_t psk_len); 149 int (*set_ie_cb)(void *ctx, struct wpabuf *beacon_ie, 150 struct wpabuf *probe_resp_ie); 151 void (*pin_needed_cb)(void *ctx, const u8 *uuid_e, 152 const struct wps_device_data *dev); 153 void (*reg_success_cb)(void *ctx, const u8 *mac_addr, 154 const u8 *uuid_e, const u8 *dev_pw, 155 size_t dev_pw_len); 156 void (*set_sel_reg_cb)(void *ctx, int sel_reg, u16 dev_passwd_id, 157 u16 sel_reg_config_methods); 158 void (*enrollee_seen_cb)(void *ctx, const u8 *addr, const u8 *uuid_e, 159 const u8 *pri_dev_type, u16 config_methods, 160 u16 dev_password_id, u8 request_type, 161 const char *dev_name); 162 void *cb_ctx; 163 164 struct dl_list pins; 165 struct dl_list nfc_pw_tokens; 166 struct wps_pbc_session *pbc_sessions; 167 168 int skip_cred_build; 169 struct wpabuf *extra_cred; 170 int disable_auto_conf; 171 int sel_reg_union; 172 int sel_reg_dev_password_id_override; 173 int sel_reg_config_methods_override; 174 int static_wep_only; 175 int dualband; 176 int force_per_enrollee_psk; 177 178 struct wps_registrar_device *devices; 179 180 int force_pbc_overlap; 181 182 u8 authorized_macs[WPS_MAX_AUTHORIZED_MACS][ETH_ALEN]; 183 u8 authorized_macs_union[WPS_MAX_AUTHORIZED_MACS][ETH_ALEN]; 184 185 u8 p2p_dev_addr[ETH_ALEN]; 186 187 u8 pbc_ignore_uuid[WPS_UUID_LEN]; 188#ifdef WPS_WORKAROUNDS 189 struct os_reltime pbc_ignore_start; 190#endif /* WPS_WORKAROUNDS */ 191 192 /** 193 * multi_ap_backhaul_ssid - SSID to supply to a Multi-AP backhaul 194 * enrollee 195 * 196 * This SSID is used by the Registrar to fill in information for 197 * Credentials when the enrollee advertises it is a Multi-AP backhaul 198 * STA. 199 */ 200 u8 multi_ap_backhaul_ssid[SSID_MAX_LEN]; 201 202 /** 203 * multi_ap_backhaul_ssid_len - Length of multi_ap_backhaul_ssid in 204 * octets 205 */ 206 size_t multi_ap_backhaul_ssid_len; 207 208 /** 209 * multi_ap_backhaul_network_key - The Network Key (PSK) for the 210 * Multi-AP backhaul enrollee. 211 * 212 * This key can be either the ASCII passphrase (8..63 characters) or the 213 * 32-octet PSK (64 hex characters). 214 */ 215 u8 *multi_ap_backhaul_network_key; 216 217 /** 218 * multi_ap_backhaul_network_key_len - Length of 219 * multi_ap_backhaul_network_key in octets 220 */ 221 size_t multi_ap_backhaul_network_key_len; 222}; 223 224 225static int wps_set_ie(struct wps_registrar *reg); 226static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx); 227static void wps_registrar_set_selected_timeout(void *eloop_ctx, 228 void *timeout_ctx); 229static void wps_registrar_remove_pin(struct wps_registrar *reg, 230 struct wps_uuid_pin *pin); 231 232 233static void wps_registrar_add_authorized_mac(struct wps_registrar *reg, 234 const u8 *addr) 235{ 236 int i; 237 wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC " MACSTR, 238 MAC2STR(addr)); 239 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++) 240 if (os_memcmp(reg->authorized_macs[i], addr, ETH_ALEN) == 0) { 241 wpa_printf(MSG_DEBUG, "WPS: Authorized MAC was " 242 "already in the list"); 243 return; /* already in list */ 244 } 245 for (i = WPS_MAX_AUTHORIZED_MACS - 1; i > 0; i--) 246 os_memcpy(reg->authorized_macs[i], reg->authorized_macs[i - 1], 247 ETH_ALEN); 248 os_memcpy(reg->authorized_macs[0], addr, ETH_ALEN); 249 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs", 250 (u8 *) reg->authorized_macs, sizeof(reg->authorized_macs)); 251} 252 253 254static void wps_registrar_remove_authorized_mac(struct wps_registrar *reg, 255 const u8 *addr) 256{ 257 int i; 258 wpa_printf(MSG_DEBUG, "WPS: Remove authorized MAC " MACSTR, 259 MAC2STR(addr)); 260 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++) { 261 if (os_memcmp(reg->authorized_macs, addr, ETH_ALEN) == 0) 262 break; 263 } 264 if (i == WPS_MAX_AUTHORIZED_MACS) { 265 wpa_printf(MSG_DEBUG, "WPS: Authorized MAC was not in the " 266 "list"); 267 return; /* not in the list */ 268 } 269 for (; i + 1 < WPS_MAX_AUTHORIZED_MACS; i++) 270 os_memcpy(reg->authorized_macs[i], reg->authorized_macs[i + 1], 271 ETH_ALEN); 272 os_memset(reg->authorized_macs[WPS_MAX_AUTHORIZED_MACS - 1], 0, 273 ETH_ALEN); 274 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs", 275 (u8 *) reg->authorized_macs, sizeof(reg->authorized_macs)); 276} 277 278 279static void wps_free_devices(struct wps_registrar_device *dev) 280{ 281 struct wps_registrar_device *prev; 282 283 while (dev) { 284 prev = dev; 285 dev = dev->next; 286 wps_device_data_free(&prev->dev); 287 os_free(prev); 288 } 289} 290 291 292static struct wps_registrar_device * wps_device_get(struct wps_registrar *reg, 293 const u8 *addr) 294{ 295 struct wps_registrar_device *dev; 296 297 for (dev = reg->devices; dev; dev = dev->next) { 298 if (os_memcmp(dev->dev.mac_addr, addr, ETH_ALEN) == 0) 299 return dev; 300 } 301 return NULL; 302} 303 304 305static void wps_device_clone_data(struct wps_device_data *dst, 306 struct wps_device_data *src) 307{ 308 os_memcpy(dst->mac_addr, src->mac_addr, ETH_ALEN); 309 os_memcpy(dst->pri_dev_type, src->pri_dev_type, WPS_DEV_TYPE_LEN); 310 311#define WPS_STRDUP(n) \ 312 os_free(dst->n); \ 313 dst->n = src->n ? os_strdup(src->n) : NULL 314 315 WPS_STRDUP(device_name); 316 WPS_STRDUP(manufacturer); 317 WPS_STRDUP(model_name); 318 WPS_STRDUP(model_number); 319 WPS_STRDUP(serial_number); 320#undef WPS_STRDUP 321} 322 323 324int wps_device_store(struct wps_registrar *reg, 325 struct wps_device_data *dev, const u8 *uuid) 326{ 327 struct wps_registrar_device *d; 328 329 d = wps_device_get(reg, dev->mac_addr); 330 if (d == NULL) { 331 d = os_zalloc(sizeof(*d)); 332 if (d == NULL) 333 return -1; 334 d->next = reg->devices; 335 reg->devices = d; 336 } 337 338 wps_device_clone_data(&d->dev, dev); 339 os_memcpy(d->uuid, uuid, WPS_UUID_LEN); 340 341 return 0; 342} 343 344 345static void wps_registrar_add_pbc_session(struct wps_registrar *reg, 346 const u8 *addr, const u8 *uuid_e) 347{ 348 struct wps_pbc_session *pbc, *prev = NULL; 349 struct os_reltime now; 350 351 os_get_reltime(&now); 352 353 pbc = reg->pbc_sessions; 354 while (pbc) { 355 if (os_memcmp(pbc->addr, addr, ETH_ALEN) == 0 && 356 os_memcmp(pbc->uuid_e, uuid_e, WPS_UUID_LEN) == 0) { 357 if (prev) 358 prev->next = pbc->next; 359 else 360 reg->pbc_sessions = pbc->next; 361 break; 362 } 363 prev = pbc; 364 pbc = pbc->next; 365 } 366 367 if (!pbc) { 368 pbc = os_zalloc(sizeof(*pbc)); 369 if (pbc == NULL) 370 return; 371 os_memcpy(pbc->addr, addr, ETH_ALEN); 372 if (uuid_e) 373 os_memcpy(pbc->uuid_e, uuid_e, WPS_UUID_LEN); 374 } 375 376 pbc->next = reg->pbc_sessions; 377 reg->pbc_sessions = pbc; 378 pbc->timestamp = now; 379 380 /* remove entries that have timed out */ 381 prev = pbc; 382 pbc = pbc->next; 383 384 while (pbc) { 385 if (os_reltime_expired(&now, &pbc->timestamp, 386 WPS_PBC_WALK_TIME)) { 387 prev->next = NULL; 388 wps_free_pbc_sessions(pbc); 389 break; 390 } 391 prev = pbc; 392 pbc = pbc->next; 393 } 394} 395 396 397static void wps_registrar_remove_pbc_session(struct wps_registrar *reg, 398 const u8 *uuid_e, 399 const u8 *p2p_dev_addr) 400{ 401 struct wps_pbc_session *pbc, *prev = NULL, *tmp; 402 403 pbc = reg->pbc_sessions; 404 while (pbc) { 405 if (os_memcmp(pbc->uuid_e, uuid_e, WPS_UUID_LEN) == 0 || 406 (p2p_dev_addr && !is_zero_ether_addr(reg->p2p_dev_addr) && 407 os_memcmp(reg->p2p_dev_addr, p2p_dev_addr, ETH_ALEN) == 408 0)) { 409 if (prev) 410 prev->next = pbc->next; 411 else 412 reg->pbc_sessions = pbc->next; 413 tmp = pbc; 414 pbc = pbc->next; 415 wpa_printf(MSG_DEBUG, "WPS: Removing PBC session for " 416 "addr=" MACSTR, MAC2STR(tmp->addr)); 417 wpa_hexdump(MSG_DEBUG, "WPS: Removed UUID-E", 418 tmp->uuid_e, WPS_UUID_LEN); 419 os_free(tmp); 420 continue; 421 } 422 prev = pbc; 423 pbc = pbc->next; 424 } 425} 426 427 428int wps_registrar_pbc_overlap(struct wps_registrar *reg, 429 const u8 *addr, const u8 *uuid_e) 430{ 431 int count = 0; 432 struct wps_pbc_session *pbc; 433 struct wps_pbc_session *first = NULL; 434 struct os_reltime now; 435 436 os_get_reltime(&now); 437 438 wpa_printf(MSG_DEBUG, "WPS: Checking active PBC sessions for overlap"); 439 440 if (uuid_e) { 441 wpa_printf(MSG_DEBUG, "WPS: Add one for the requested UUID"); 442 wpa_hexdump(MSG_DEBUG, "WPS: Requested UUID", 443 uuid_e, WPS_UUID_LEN); 444 count++; 445 } 446 447 for (pbc = reg->pbc_sessions; pbc; pbc = pbc->next) { 448 wpa_printf(MSG_DEBUG, "WPS: Consider PBC session with " MACSTR, 449 MAC2STR(pbc->addr)); 450 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E", 451 pbc->uuid_e, WPS_UUID_LEN); 452 if (os_reltime_expired(&now, &pbc->timestamp, 453 WPS_PBC_WALK_TIME)) { 454 wpa_printf(MSG_DEBUG, "WPS: PBC walk time has expired"); 455 break; 456 } 457 if (first && 458 os_memcmp(pbc->uuid_e, first->uuid_e, WPS_UUID_LEN) == 0) { 459 wpa_printf(MSG_DEBUG, "WPS: Same Enrollee"); 460 continue; /* same Enrollee */ 461 } 462 if (uuid_e == NULL || 463 os_memcmp(uuid_e, pbc->uuid_e, WPS_UUID_LEN)) { 464 wpa_printf(MSG_DEBUG, "WPS: New Enrollee"); 465 count++; 466 } 467 if (first == NULL) 468 first = pbc; 469 } 470 471 wpa_printf(MSG_DEBUG, "WPS: %u active PBC session(s) found", count); 472 473 return count > 1 ? 1 : 0; 474} 475 476 477static int wps_build_wps_state(struct wps_context *wps, struct wpabuf *msg) 478{ 479 wpa_printf(MSG_DEBUG, "WPS: * Wi-Fi Protected Setup State (%d)", 480 wps->wps_state); 481 wpabuf_put_be16(msg, ATTR_WPS_STATE); 482 wpabuf_put_be16(msg, 1); 483 wpabuf_put_u8(msg, wps->wps_state); 484 return 0; 485} 486 487 488#ifdef CONFIG_WPS_UPNP 489static void wps_registrar_free_pending_m2(struct wps_context *wps) 490{ 491 struct upnp_pending_message *p, *p2, *prev = NULL; 492 p = wps->upnp_msgs; 493 while (p) { 494 if (p->type == WPS_M2 || p->type == WPS_M2D) { 495 if (prev == NULL) 496 wps->upnp_msgs = p->next; 497 else 498 prev->next = p->next; 499 wpa_printf(MSG_DEBUG, "WPS UPnP: Drop pending M2/M2D"); 500 p2 = p; 501 p = p->next; 502 wpabuf_free(p2->msg); 503 os_free(p2); 504 continue; 505 } 506 prev = p; 507 p = p->next; 508 } 509} 510#endif /* CONFIG_WPS_UPNP */ 511 512 513static int wps_build_ap_setup_locked(struct wps_context *wps, 514 struct wpabuf *msg) 515{ 516 if (wps->ap_setup_locked && wps->ap_setup_locked != 2) { 517 wpa_printf(MSG_DEBUG, "WPS: * AP Setup Locked"); 518 wpabuf_put_be16(msg, ATTR_AP_SETUP_LOCKED); 519 wpabuf_put_be16(msg, 1); 520 wpabuf_put_u8(msg, 1); 521 } 522 return 0; 523} 524 525 526static int wps_build_selected_registrar(struct wps_registrar *reg, 527 struct wpabuf *msg) 528{ 529 if (!reg->sel_reg_union) 530 return 0; 531 wpa_printf(MSG_DEBUG, "WPS: * Selected Registrar"); 532 wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR); 533 wpabuf_put_be16(msg, 1); 534 wpabuf_put_u8(msg, 1); 535 return 0; 536} 537 538 539static int wps_build_sel_reg_dev_password_id(struct wps_registrar *reg, 540 struct wpabuf *msg) 541{ 542 u16 id = reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT; 543 if (!reg->sel_reg_union) 544 return 0; 545 if (reg->sel_reg_dev_password_id_override >= 0) 546 id = reg->sel_reg_dev_password_id_override; 547 wpa_printf(MSG_DEBUG, "WPS: * Device Password ID (%d)", id); 548 wpabuf_put_be16(msg, ATTR_DEV_PASSWORD_ID); 549 wpabuf_put_be16(msg, 2); 550 wpabuf_put_be16(msg, id); 551 return 0; 552} 553 554 555static int wps_build_sel_pbc_reg_uuid_e(struct wps_registrar *reg, 556 struct wpabuf *msg) 557{ 558 u16 id = reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT; 559 if (!reg->sel_reg_union) 560 return 0; 561 if (reg->sel_reg_dev_password_id_override >= 0) 562 id = reg->sel_reg_dev_password_id_override; 563 if (id != DEV_PW_PUSHBUTTON || !reg->dualband) 564 return 0; 565 return wps_build_uuid_e(msg, reg->wps->uuid); 566} 567 568 569static void wps_set_pushbutton(u16 *methods, u16 conf_methods) 570{ 571 *methods |= WPS_CONFIG_PUSHBUTTON; 572 if ((conf_methods & WPS_CONFIG_VIRT_PUSHBUTTON) == 573 WPS_CONFIG_VIRT_PUSHBUTTON) 574 *methods |= WPS_CONFIG_VIRT_PUSHBUTTON; 575 if ((conf_methods & WPS_CONFIG_PHY_PUSHBUTTON) == 576 WPS_CONFIG_PHY_PUSHBUTTON) 577 *methods |= WPS_CONFIG_PHY_PUSHBUTTON; 578 if ((*methods & WPS_CONFIG_VIRT_PUSHBUTTON) != 579 WPS_CONFIG_VIRT_PUSHBUTTON && 580 (*methods & WPS_CONFIG_PHY_PUSHBUTTON) != 581 WPS_CONFIG_PHY_PUSHBUTTON) { 582 /* 583 * Required to include virtual/physical flag, but we were not 584 * configured with push button type, so have to default to one 585 * of them. 586 */ 587 *methods |= WPS_CONFIG_PHY_PUSHBUTTON; 588 } 589} 590 591 592static int wps_build_sel_reg_config_methods(struct wps_registrar *reg, 593 struct wpabuf *msg) 594{ 595 u16 methods; 596 if (!reg->sel_reg_union) 597 return 0; 598 methods = reg->wps->config_methods; 599 methods &= ~WPS_CONFIG_PUSHBUTTON; 600 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 601 WPS_CONFIG_PHY_PUSHBUTTON); 602 if (reg->pbc) 603 wps_set_pushbutton(&methods, reg->wps->config_methods); 604 if (reg->sel_reg_config_methods_override >= 0) 605 methods = reg->sel_reg_config_methods_override; 606 wpa_printf(MSG_DEBUG, "WPS: * Selected Registrar Config Methods (%x)", 607 methods); 608 wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR_CONFIG_METHODS); 609 wpabuf_put_be16(msg, 2); 610 wpabuf_put_be16(msg, methods); 611 return 0; 612} 613 614 615static int wps_build_probe_config_methods(struct wps_registrar *reg, 616 struct wpabuf *msg) 617{ 618 u16 methods; 619 /* 620 * These are the methods that the AP supports as an Enrollee for adding 621 * external Registrars. 622 */ 623 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON; 624 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 625 WPS_CONFIG_PHY_PUSHBUTTON); 626 wpa_printf(MSG_DEBUG, "WPS: * Config Methods (%x)", methods); 627 wpabuf_put_be16(msg, ATTR_CONFIG_METHODS); 628 wpabuf_put_be16(msg, 2); 629 wpabuf_put_be16(msg, methods); 630 return 0; 631} 632 633 634static int wps_build_config_methods_r(struct wps_registrar *reg, 635 struct wpabuf *msg) 636{ 637 return wps_build_config_methods(msg, reg->wps->config_methods); 638} 639 640 641const u8 * wps_authorized_macs(struct wps_registrar *reg, size_t *count) 642{ 643 *count = 0; 644 645 while (*count < WPS_MAX_AUTHORIZED_MACS) { 646 if (is_zero_ether_addr(reg->authorized_macs_union[*count])) 647 break; 648 (*count)++; 649 } 650 651 return (const u8 *) reg->authorized_macs_union; 652} 653 654 655/** 656 * wps_registrar_init - Initialize WPS Registrar data 657 * @wps: Pointer to longterm WPS context 658 * @cfg: Registrar configuration 659 * Returns: Pointer to allocated Registrar data or %NULL on failure 660 * 661 * This function is used to initialize WPS Registrar functionality. It can be 662 * used for a single Registrar run (e.g., when run in a supplicant) or multiple 663 * runs (e.g., when run as an internal Registrar in an AP). Caller is 664 * responsible for freeing the returned data with wps_registrar_deinit() when 665 * Registrar functionality is not needed anymore. 666 */ 667struct wps_registrar * 668wps_registrar_init(struct wps_context *wps, 669 const struct wps_registrar_config *cfg) 670{ 671 struct wps_registrar *reg = os_zalloc(sizeof(*reg)); 672 if (reg == NULL) 673 return NULL; 674 675 dl_list_init(®->pins); 676 dl_list_init(®->nfc_pw_tokens); 677 reg->wps = wps; 678 reg->new_psk_cb = cfg->new_psk_cb; 679 reg->set_ie_cb = cfg->set_ie_cb; 680 reg->pin_needed_cb = cfg->pin_needed_cb; 681 reg->reg_success_cb = cfg->reg_success_cb; 682 reg->set_sel_reg_cb = cfg->set_sel_reg_cb; 683 reg->enrollee_seen_cb = cfg->enrollee_seen_cb; 684 reg->cb_ctx = cfg->cb_ctx; 685 reg->skip_cred_build = cfg->skip_cred_build; 686 if (cfg->extra_cred) { 687 reg->extra_cred = wpabuf_alloc_copy(cfg->extra_cred, 688 cfg->extra_cred_len); 689 if (reg->extra_cred == NULL) { 690 os_free(reg); 691 return NULL; 692 } 693 } 694 reg->disable_auto_conf = cfg->disable_auto_conf; 695 reg->sel_reg_dev_password_id_override = -1; 696 reg->sel_reg_config_methods_override = -1; 697 reg->static_wep_only = cfg->static_wep_only; 698 reg->dualband = cfg->dualband; 699 reg->force_per_enrollee_psk = cfg->force_per_enrollee_psk; 700 701 if (cfg->multi_ap_backhaul_ssid) { 702 os_memcpy(reg->multi_ap_backhaul_ssid, 703 cfg->multi_ap_backhaul_ssid, 704 cfg->multi_ap_backhaul_ssid_len); 705 reg->multi_ap_backhaul_ssid_len = 706 cfg->multi_ap_backhaul_ssid_len; 707 } 708 if (cfg->multi_ap_backhaul_network_key) { 709 reg->multi_ap_backhaul_network_key = 710 os_memdup(cfg->multi_ap_backhaul_network_key, 711 cfg->multi_ap_backhaul_network_key_len); 712 if (reg->multi_ap_backhaul_network_key) 713 reg->multi_ap_backhaul_network_key_len = 714 cfg->multi_ap_backhaul_network_key_len; 715 } 716 717 if (wps_set_ie(reg)) { 718 wps_registrar_deinit(reg); 719 return NULL; 720 } 721 722 return reg; 723} 724 725 726void wps_registrar_flush(struct wps_registrar *reg) 727{ 728 if (reg == NULL) 729 return; 730 wps_free_pins(®->pins); 731 wps_free_nfc_pw_tokens(®->nfc_pw_tokens, 0); 732 wps_free_pbc_sessions(reg->pbc_sessions); 733 reg->pbc_sessions = NULL; 734 wps_free_devices(reg->devices); 735 reg->devices = NULL; 736#ifdef WPS_WORKAROUNDS 737 reg->pbc_ignore_start.sec = 0; 738#endif /* WPS_WORKAROUNDS */ 739} 740 741 742/** 743 * wps_registrar_deinit - Deinitialize WPS Registrar data 744 * @reg: Registrar data from wps_registrar_init() 745 */ 746void wps_registrar_deinit(struct wps_registrar *reg) 747{ 748 if (reg == NULL) 749 return; 750 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 751 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 752 wps_registrar_flush(reg); 753 wpabuf_clear_free(reg->extra_cred); 754 bin_clear_free(reg->multi_ap_backhaul_network_key, 755 reg->multi_ap_backhaul_network_key_len); 756 os_free(reg); 757} 758 759 760static void wps_registrar_invalidate_unused(struct wps_registrar *reg) 761{ 762 struct wps_uuid_pin *pin; 763 764 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 765 if (pin->wildcard_uuid == 1 && !(pin->flags & PIN_LOCKED)) { 766 wpa_printf(MSG_DEBUG, "WPS: Invalidate previously " 767 "configured wildcard PIN"); 768 wps_registrar_remove_pin(reg, pin); 769 break; 770 } 771 } 772} 773 774 775/** 776 * wps_registrar_add_pin - Configure a new PIN for Registrar 777 * @reg: Registrar data from wps_registrar_init() 778 * @addr: Enrollee MAC address or %NULL if not known 779 * @uuid: UUID-E or %NULL for wildcard (any UUID) 780 * @pin: PIN (Device Password) 781 * @pin_len: Length of pin in octets 782 * @timeout: Time (in seconds) when the PIN will be invalidated; 0 = no timeout 783 * Returns: 0 on success, -1 on failure 784 */ 785int wps_registrar_add_pin(struct wps_registrar *reg, const u8 *addr, 786 const u8 *uuid, const u8 *pin, size_t pin_len, 787 int timeout) 788{ 789 struct wps_uuid_pin *p; 790 791 p = os_zalloc(sizeof(*p)); 792 if (p == NULL) 793 return -1; 794 if (addr) 795 os_memcpy(p->enrollee_addr, addr, ETH_ALEN); 796 if (uuid == NULL) 797 p->wildcard_uuid = 1; 798 else 799 os_memcpy(p->uuid, uuid, WPS_UUID_LEN); 800 p->pin = os_memdup(pin, pin_len); 801 if (p->pin == NULL) { 802 os_free(p); 803 return -1; 804 } 805 p->pin_len = pin_len; 806 807 if (timeout) { 808 p->flags |= PIN_EXPIRES; 809 os_get_reltime(&p->expiration); 810 p->expiration.sec += timeout; 811 } 812 813 if (p->wildcard_uuid) 814 wps_registrar_invalidate_unused(reg); 815 816 dl_list_add(®->pins, &p->list); 817 818 wpa_printf(MSG_DEBUG, "WPS: A new PIN configured (timeout=%d)", 819 timeout); 820 wpa_hexdump(MSG_DEBUG, "WPS: UUID", uuid, WPS_UUID_LEN); 821 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: PIN", pin, pin_len); 822 reg->selected_registrar = 1; 823 reg->pbc = 0; 824 if (addr) 825 wps_registrar_add_authorized_mac(reg, addr); 826 else 827 wps_registrar_add_authorized_mac( 828 reg, (u8 *) "\xff\xff\xff\xff\xff\xff"); 829 wps_registrar_selected_registrar_changed(reg, 0); 830 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 831 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, 832 wps_registrar_set_selected_timeout, 833 reg, NULL); 834 835 return 0; 836} 837 838 839static void wps_registrar_remove_pin(struct wps_registrar *reg, 840 struct wps_uuid_pin *pin) 841{ 842 u8 *addr; 843 u8 bcast[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 844 845 if (is_zero_ether_addr(pin->enrollee_addr)) 846 addr = bcast; 847 else 848 addr = pin->enrollee_addr; 849 wps_registrar_remove_authorized_mac(reg, addr); 850 wps_remove_pin(pin); 851 wps_registrar_selected_registrar_changed(reg, 0); 852} 853 854 855static void wps_registrar_expire_pins(struct wps_registrar *reg) 856{ 857 struct wps_uuid_pin *pin, *prev; 858 struct os_reltime now; 859 860 os_get_reltime(&now); 861 dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list) 862 { 863 if ((pin->flags & PIN_EXPIRES) && 864 os_reltime_before(&pin->expiration, &now)) { 865 wpa_hexdump(MSG_DEBUG, "WPS: Expired PIN for UUID", 866 pin->uuid, WPS_UUID_LEN); 867 wps_registrar_remove_pin(reg, pin); 868 } 869 } 870} 871 872 873/** 874 * wps_registrar_invalidate_wildcard_pin - Invalidate a wildcard PIN 875 * @reg: Registrar data from wps_registrar_init() 876 * @dev_pw: PIN to search for or %NULL to match any 877 * @dev_pw_len: Length of dev_pw in octets 878 * Returns: 0 on success, -1 if not wildcard PIN is enabled 879 */ 880static int wps_registrar_invalidate_wildcard_pin(struct wps_registrar *reg, 881 const u8 *dev_pw, 882 size_t dev_pw_len) 883{ 884 struct wps_uuid_pin *pin, *prev; 885 886 dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list) 887 { 888 if (dev_pw && pin->pin && 889 (dev_pw_len != pin->pin_len || 890 os_memcmp_const(dev_pw, pin->pin, dev_pw_len) != 0)) 891 continue; /* different PIN */ 892 if (pin->wildcard_uuid) { 893 wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID", 894 pin->uuid, WPS_UUID_LEN); 895 wps_registrar_remove_pin(reg, pin); 896 return 0; 897 } 898 } 899 900 return -1; 901} 902 903 904/** 905 * wps_registrar_invalidate_pin - Invalidate a PIN for a specific UUID-E 906 * @reg: Registrar data from wps_registrar_init() 907 * @uuid: UUID-E 908 * Returns: 0 on success, -1 on failure (e.g., PIN not found) 909 */ 910int wps_registrar_invalidate_pin(struct wps_registrar *reg, const u8 *uuid) 911{ 912 struct wps_uuid_pin *pin, *prev; 913 914 dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list) 915 { 916 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) { 917 wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID", 918 pin->uuid, WPS_UUID_LEN); 919 wps_registrar_remove_pin(reg, pin); 920 return 0; 921 } 922 } 923 924 return -1; 925} 926 927 928static const u8 * wps_registrar_get_pin(struct wps_registrar *reg, 929 const u8 *uuid, size_t *pin_len) 930{ 931 struct wps_uuid_pin *pin, *found = NULL; 932 int wildcard = 0; 933 934 wps_registrar_expire_pins(reg); 935 936 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 937 if (!pin->wildcard_uuid && 938 os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) { 939 found = pin; 940 break; 941 } 942 } 943 944 if (!found) { 945 /* Check for wildcard UUIDs since none of the UUID-specific 946 * PINs matched */ 947 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 948 if (pin->wildcard_uuid == 1 || 949 pin->wildcard_uuid == 2) { 950 wpa_printf(MSG_DEBUG, "WPS: Found a wildcard " 951 "PIN. Assigned it for this UUID-E"); 952 wildcard = 1; 953 os_memcpy(pin->uuid, uuid, WPS_UUID_LEN); 954 found = pin; 955 break; 956 } 957 } 958 } 959 960 if (!found) 961 return NULL; 962 963 /* 964 * Lock the PIN to avoid attacks based on concurrent re-use of the PIN 965 * that could otherwise avoid PIN invalidations. 966 */ 967 if (found->flags & PIN_LOCKED) { 968 wpa_printf(MSG_DEBUG, "WPS: Selected PIN locked - do not " 969 "allow concurrent re-use"); 970 return NULL; 971 } 972 *pin_len = found->pin_len; 973 found->flags |= PIN_LOCKED; 974 if (wildcard) 975 found->wildcard_uuid++; 976 return found->pin; 977} 978 979 980/** 981 * wps_registrar_unlock_pin - Unlock a PIN for a specific UUID-E 982 * @reg: Registrar data from wps_registrar_init() 983 * @uuid: UUID-E 984 * Returns: 0 on success, -1 on failure 985 * 986 * PINs are locked to enforce only one concurrent use. This function unlocks a 987 * PIN to allow it to be used again. If the specified PIN was configured using 988 * a wildcard UUID, it will be removed instead of allowing multiple uses. 989 */ 990int wps_registrar_unlock_pin(struct wps_registrar *reg, const u8 *uuid) 991{ 992 struct wps_uuid_pin *pin; 993 994 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 995 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) { 996 if (pin->wildcard_uuid == 3) { 997 wpa_printf(MSG_DEBUG, "WPS: Invalidating used " 998 "wildcard PIN"); 999 return wps_registrar_invalidate_pin(reg, uuid); 1000 } 1001 pin->flags &= ~PIN_LOCKED; 1002 return 0; 1003 } 1004 } 1005 1006 return -1; 1007} 1008 1009 1010static void wps_registrar_stop_pbc(struct wps_registrar *reg) 1011{ 1012 reg->selected_registrar = 0; 1013 reg->pbc = 0; 1014 os_memset(reg->p2p_dev_addr, 0, ETH_ALEN); 1015 wps_registrar_remove_authorized_mac(reg, 1016 (u8 *) "\xff\xff\xff\xff\xff\xff"); 1017 wps_registrar_selected_registrar_changed(reg, 0); 1018} 1019 1020 1021static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx) 1022{ 1023 struct wps_registrar *reg = eloop_ctx; 1024 1025 wpa_printf(MSG_DEBUG, "WPS: PBC timed out - disable PBC mode"); 1026 wps_pbc_timeout_event(reg->wps); 1027 wps_registrar_stop_pbc(reg); 1028} 1029 1030 1031/** 1032 * wps_registrar_button_pushed - Notify Registrar that AP button was pushed 1033 * @reg: Registrar data from wps_registrar_init() 1034 * @p2p_dev_addr: Limit allowed PBC devices to the specified P2P device, %NULL 1035 * indicates no such filtering 1036 * Returns: 0 on success, -1 on failure, -2 on session overlap 1037 * 1038 * This function is called on an AP when a push button is pushed to activate 1039 * PBC mode. The PBC mode will be stopped after walk time (2 minutes) timeout 1040 * or when a PBC registration is completed. If more than one Enrollee in active 1041 * PBC mode has been detected during the monitor time (previous 2 minutes), the 1042 * PBC mode is not activated and -2 is returned to indicate session overlap. 1043 * This is skipped if a specific Enrollee is selected. 1044 */ 1045int wps_registrar_button_pushed(struct wps_registrar *reg, 1046 const u8 *p2p_dev_addr) 1047{ 1048 if (p2p_dev_addr == NULL && 1049 wps_registrar_pbc_overlap(reg, NULL, NULL)) { 1050 wpa_printf(MSG_DEBUG, "WPS: PBC overlap - do not start PBC " 1051 "mode"); 1052 wps_pbc_overlap_event(reg->wps); 1053 return -2; 1054 } 1055 wpa_printf(MSG_DEBUG, "WPS: Button pushed - PBC mode started"); 1056 reg->force_pbc_overlap = 0; 1057 reg->selected_registrar = 1; 1058 reg->pbc = 1; 1059 if (p2p_dev_addr) 1060 os_memcpy(reg->p2p_dev_addr, p2p_dev_addr, ETH_ALEN); 1061 else 1062 os_memset(reg->p2p_dev_addr, 0, ETH_ALEN); 1063 wps_registrar_add_authorized_mac(reg, 1064 (u8 *) "\xff\xff\xff\xff\xff\xff"); 1065 wps_registrar_selected_registrar_changed(reg, 0); 1066 1067 wps_pbc_active_event(reg->wps); 1068 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 1069 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 1070 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wps_registrar_pbc_timeout, 1071 reg, NULL); 1072 return 0; 1073} 1074 1075 1076static void wps_registrar_pbc_completed(struct wps_registrar *reg) 1077{ 1078 wpa_printf(MSG_DEBUG, "WPS: PBC completed - stopping PBC mode"); 1079 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 1080 wps_registrar_stop_pbc(reg); 1081 wps_pbc_disable_event(reg->wps); 1082} 1083 1084 1085static void wps_registrar_pin_completed(struct wps_registrar *reg) 1086{ 1087 wpa_printf(MSG_DEBUG, "WPS: PIN completed using internal Registrar"); 1088 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 1089 reg->selected_registrar = 0; 1090 wps_registrar_selected_registrar_changed(reg, 0); 1091} 1092 1093 1094void wps_registrar_complete(struct wps_registrar *registrar, const u8 *uuid_e, 1095 const u8 *dev_pw, size_t dev_pw_len) 1096{ 1097 if (registrar->pbc) { 1098 wps_registrar_remove_pbc_session(registrar, 1099 uuid_e, NULL); 1100 wps_registrar_pbc_completed(registrar); 1101#ifdef WPS_WORKAROUNDS 1102 os_get_reltime(®istrar->pbc_ignore_start); 1103#endif /* WPS_WORKAROUNDS */ 1104 os_memcpy(registrar->pbc_ignore_uuid, uuid_e, WPS_UUID_LEN); 1105 } else { 1106 wps_registrar_pin_completed(registrar); 1107 } 1108 1109 if (dev_pw && 1110 wps_registrar_invalidate_wildcard_pin(registrar, dev_pw, 1111 dev_pw_len) == 0) { 1112 wpa_hexdump_key(MSG_DEBUG, "WPS: Invalidated wildcard PIN", 1113 dev_pw, dev_pw_len); 1114 } 1115} 1116 1117 1118int wps_registrar_wps_cancel(struct wps_registrar *reg) 1119{ 1120 if (reg->pbc) { 1121 wpa_printf(MSG_DEBUG, "WPS: PBC is set - cancelling it"); 1122 wps_registrar_pbc_timeout(reg, NULL); 1123 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 1124 return 1; 1125 } else if (reg->selected_registrar) { 1126 /* PIN Method */ 1127 wpa_printf(MSG_DEBUG, "WPS: PIN is set - cancelling it"); 1128 wps_registrar_pin_completed(reg); 1129 wps_registrar_invalidate_wildcard_pin(reg, NULL, 0); 1130 return 1; 1131 } 1132 return 0; 1133} 1134 1135 1136/** 1137 * wps_registrar_probe_req_rx - Notify Registrar of Probe Request 1138 * @reg: Registrar data from wps_registrar_init() 1139 * @addr: MAC address of the Probe Request sender 1140 * @wps_data: WPS IE contents 1141 * 1142 * This function is called on an AP when a Probe Request with WPS IE is 1143 * received. This is used to track PBC mode use and to detect possible overlap 1144 * situation with other WPS APs. 1145 */ 1146void wps_registrar_probe_req_rx(struct wps_registrar *reg, const u8 *addr, 1147 const struct wpabuf *wps_data, 1148 int p2p_wildcard) 1149{ 1150 struct wps_parse_attr attr; 1151 int skip_add = 0; 1152 1153 wpa_hexdump_buf(MSG_MSGDUMP, 1154 "WPS: Probe Request with WPS data received", 1155 wps_data); 1156 1157 if (wps_parse_msg(wps_data, &attr) < 0) 1158 return; 1159 1160 if (attr.config_methods == NULL) { 1161 wpa_printf(MSG_DEBUG, "WPS: No Config Methods attribute in " 1162 "Probe Request"); 1163 return; 1164 } 1165 1166 if (attr.dev_password_id == NULL) { 1167 wpa_printf(MSG_DEBUG, "WPS: No Device Password Id attribute " 1168 "in Probe Request"); 1169 return; 1170 } 1171 1172 if (reg->enrollee_seen_cb && attr.uuid_e && 1173 attr.primary_dev_type && attr.request_type && !p2p_wildcard) { 1174 char *dev_name = NULL; 1175 if (attr.dev_name) { 1176 dev_name = os_zalloc(attr.dev_name_len + 1); 1177 if (dev_name) { 1178 os_memcpy(dev_name, attr.dev_name, 1179 attr.dev_name_len); 1180 } 1181 } 1182 reg->enrollee_seen_cb(reg->cb_ctx, addr, attr.uuid_e, 1183 attr.primary_dev_type, 1184 WPA_GET_BE16(attr.config_methods), 1185 WPA_GET_BE16(attr.dev_password_id), 1186 *attr.request_type, dev_name); 1187 os_free(dev_name); 1188 } 1189 1190 if (WPA_GET_BE16(attr.dev_password_id) != DEV_PW_PUSHBUTTON) 1191 return; /* Not PBC */ 1192 1193 wpa_printf(MSG_DEBUG, "WPS: Probe Request for PBC received from " 1194 MACSTR, MAC2STR(addr)); 1195 if (attr.uuid_e == NULL) { 1196 wpa_printf(MSG_DEBUG, "WPS: Invalid Probe Request WPS IE: No " 1197 "UUID-E included"); 1198 return; 1199 } 1200 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E from Probe Request", attr.uuid_e, 1201 WPS_UUID_LEN); 1202 1203#ifdef WPS_WORKAROUNDS 1204 if (reg->pbc_ignore_start.sec && 1205 os_memcmp(attr.uuid_e, reg->pbc_ignore_uuid, WPS_UUID_LEN) == 0) { 1206 struct os_reltime now, dur; 1207 os_get_reltime(&now); 1208 os_reltime_sub(&now, ®->pbc_ignore_start, &dur); 1209 if (dur.sec >= 0 && dur.sec < 5) { 1210 wpa_printf(MSG_DEBUG, "WPS: Ignore PBC activation " 1211 "based on Probe Request from the Enrollee " 1212 "that just completed PBC provisioning"); 1213 skip_add = 1; 1214 } else 1215 reg->pbc_ignore_start.sec = 0; 1216 } 1217#endif /* WPS_WORKAROUNDS */ 1218 1219 if (!skip_add) 1220 wps_registrar_add_pbc_session(reg, addr, attr.uuid_e); 1221 if (wps_registrar_pbc_overlap(reg, addr, attr.uuid_e)) { 1222 wpa_printf(MSG_DEBUG, "WPS: PBC session overlap detected"); 1223 reg->force_pbc_overlap = 1; 1224 wps_pbc_overlap_event(reg->wps); 1225 } 1226} 1227 1228 1229int wps_cb_new_psk(struct wps_registrar *reg, const u8 *mac_addr, 1230 const u8 *p2p_dev_addr, const u8 *psk, size_t psk_len) 1231{ 1232 if (reg->new_psk_cb == NULL) 1233 return 0; 1234 1235 return reg->new_psk_cb(reg->cb_ctx, mac_addr, p2p_dev_addr, psk, 1236 psk_len); 1237} 1238 1239 1240static void wps_cb_pin_needed(struct wps_registrar *reg, const u8 *uuid_e, 1241 const struct wps_device_data *dev) 1242{ 1243 if (reg->pin_needed_cb == NULL) 1244 return; 1245 1246 reg->pin_needed_cb(reg->cb_ctx, uuid_e, dev); 1247} 1248 1249 1250static void wps_cb_reg_success(struct wps_registrar *reg, const u8 *mac_addr, 1251 const u8 *uuid_e, const u8 *dev_pw, 1252 size_t dev_pw_len) 1253{ 1254 if (reg->reg_success_cb == NULL) 1255 return; 1256 1257 reg->reg_success_cb(reg->cb_ctx, mac_addr, uuid_e, dev_pw, dev_pw_len); 1258} 1259 1260 1261static int wps_cb_set_ie(struct wps_registrar *reg, struct wpabuf *beacon_ie, 1262 struct wpabuf *probe_resp_ie) 1263{ 1264 return reg->set_ie_cb(reg->cb_ctx, beacon_ie, probe_resp_ie); 1265} 1266 1267 1268static void wps_cb_set_sel_reg(struct wps_registrar *reg) 1269{ 1270 u16 methods = 0; 1271 if (reg->set_sel_reg_cb == NULL) 1272 return; 1273 1274 if (reg->selected_registrar) { 1275 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON; 1276 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 1277 WPS_CONFIG_PHY_PUSHBUTTON); 1278 if (reg->pbc) 1279 wps_set_pushbutton(&methods, reg->wps->config_methods); 1280 } 1281 1282 wpa_printf(MSG_DEBUG, "WPS: wps_cb_set_sel_reg: sel_reg=%d " 1283 "config_methods=0x%x pbc=%d methods=0x%x", 1284 reg->selected_registrar, reg->wps->config_methods, 1285 reg->pbc, methods); 1286 1287 reg->set_sel_reg_cb(reg->cb_ctx, reg->selected_registrar, 1288 reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT, 1289 methods); 1290} 1291 1292 1293static int wps_set_ie(struct wps_registrar *reg) 1294{ 1295 struct wpabuf *beacon; 1296 struct wpabuf *probe; 1297 const u8 *auth_macs; 1298 size_t count; 1299 size_t vendor_len = 0; 1300 int i; 1301 1302 if (reg->set_ie_cb == NULL) 1303 return 0; 1304 1305 for (i = 0; i < MAX_WPS_VENDOR_EXTENSIONS; i++) { 1306 if (reg->wps->dev.vendor_ext[i]) { 1307 vendor_len += 2 + 2; 1308 vendor_len += wpabuf_len(reg->wps->dev.vendor_ext[i]); 1309 } 1310 } 1311 1312 beacon = wpabuf_alloc(400 + vendor_len); 1313 if (beacon == NULL) 1314 return -1; 1315 probe = wpabuf_alloc(500 + vendor_len); 1316 if (probe == NULL) { 1317 wpabuf_free(beacon); 1318 return -1; 1319 } 1320 1321 auth_macs = wps_authorized_macs(reg, &count); 1322 1323 wpa_printf(MSG_DEBUG, "WPS: Build Beacon IEs"); 1324 1325 if (wps_build_version(beacon) || 1326 wps_build_wps_state(reg->wps, beacon) || 1327 wps_build_ap_setup_locked(reg->wps, beacon) || 1328 wps_build_selected_registrar(reg, beacon) || 1329 wps_build_sel_reg_dev_password_id(reg, beacon) || 1330 wps_build_sel_reg_config_methods(reg, beacon) || 1331 wps_build_sel_pbc_reg_uuid_e(reg, beacon) || 1332 (reg->dualband && wps_build_rf_bands(®->wps->dev, beacon, 0)) || 1333 wps_build_wfa_ext(beacon, 0, auth_macs, count, 0) || 1334 wps_build_vendor_ext(®->wps->dev, beacon)) { 1335 wpabuf_free(beacon); 1336 wpabuf_free(probe); 1337 return -1; 1338 } 1339 1340#ifdef CONFIG_P2P 1341 if (wps_build_dev_name(®->wps->dev, beacon) || 1342 wps_build_primary_dev_type(®->wps->dev, beacon)) { 1343 wpabuf_free(beacon); 1344 wpabuf_free(probe); 1345 return -1; 1346 } 1347#endif /* CONFIG_P2P */ 1348 1349 wpa_printf(MSG_DEBUG, "WPS: Build Probe Response IEs"); 1350 1351 if (wps_build_version(probe) || 1352 wps_build_wps_state(reg->wps, probe) || 1353 wps_build_ap_setup_locked(reg->wps, probe) || 1354 wps_build_selected_registrar(reg, probe) || 1355 wps_build_sel_reg_dev_password_id(reg, probe) || 1356 wps_build_sel_reg_config_methods(reg, probe) || 1357 wps_build_resp_type(probe, reg->wps->ap ? WPS_RESP_AP : 1358 WPS_RESP_REGISTRAR) || 1359 wps_build_uuid_e(probe, reg->wps->uuid) || 1360 wps_build_device_attrs(®->wps->dev, probe) || 1361 wps_build_probe_config_methods(reg, probe) || 1362 (reg->dualband && wps_build_rf_bands(®->wps->dev, probe, 0)) || 1363 wps_build_wfa_ext(probe, 0, auth_macs, count, 0) || 1364 wps_build_vendor_ext(®->wps->dev, probe)) { 1365 wpabuf_free(beacon); 1366 wpabuf_free(probe); 1367 return -1; 1368 } 1369 1370 beacon = wps_ie_encapsulate(beacon); 1371 probe = wps_ie_encapsulate(probe); 1372 1373 if (!beacon || !probe) { 1374 wpabuf_free(beacon); 1375 wpabuf_free(probe); 1376 return -1; 1377 } 1378 1379 if (reg->static_wep_only) { 1380 /* 1381 * Windows XP and Vista clients can get confused about 1382 * EAP-Identity/Request when they probe the network with 1383 * EAPOL-Start. In such a case, they may assume the network is 1384 * using IEEE 802.1X and prompt user for a certificate while 1385 * the correct (non-WPS) behavior would be to ask for the 1386 * static WEP key. As a workaround, use Microsoft Provisioning 1387 * IE to advertise that legacy 802.1X is not supported. 1388 */ 1389 const u8 ms_wps[7] = { 1390 WLAN_EID_VENDOR_SPECIFIC, 5, 1391 /* Microsoft Provisioning IE (00:50:f2:5) */ 1392 0x00, 0x50, 0xf2, 5, 1393 0x00 /* no legacy 802.1X or MS WPS */ 1394 }; 1395 wpa_printf(MSG_DEBUG, "WPS: Add Microsoft Provisioning IE " 1396 "into Beacon/Probe Response frames"); 1397 wpabuf_put_data(beacon, ms_wps, sizeof(ms_wps)); 1398 wpabuf_put_data(probe, ms_wps, sizeof(ms_wps)); 1399 } 1400 1401 return wps_cb_set_ie(reg, beacon, probe); 1402} 1403 1404 1405static int wps_get_dev_password(struct wps_data *wps) 1406{ 1407 const u8 *pin; 1408 size_t pin_len = 0; 1409 1410 bin_clear_free(wps->dev_password, wps->dev_password_len); 1411 wps->dev_password = NULL; 1412 1413 if (wps->pbc) { 1414 wpa_printf(MSG_DEBUG, "WPS: Use default PIN for PBC"); 1415 pin = (const u8 *) "00000000"; 1416 pin_len = 8; 1417#ifdef CONFIG_WPS_NFC 1418 } else if (wps->nfc_pw_token) { 1419 if (wps->nfc_pw_token->pw_id == DEV_PW_NFC_CONNECTION_HANDOVER) 1420 { 1421 wpa_printf(MSG_DEBUG, "WPS: Using NFC connection " 1422 "handover and abbreviated WPS handshake " 1423 "without Device Password"); 1424 return 0; 1425 } 1426 wpa_printf(MSG_DEBUG, "WPS: Use OOB Device Password from NFC " 1427 "Password Token"); 1428 pin = wps->nfc_pw_token->dev_pw; 1429 pin_len = wps->nfc_pw_token->dev_pw_len; 1430 } else if (wps->dev_pw_id >= 0x10 && 1431 wps->wps->ap_nfc_dev_pw_id == wps->dev_pw_id && 1432 wps->wps->ap_nfc_dev_pw) { 1433 wpa_printf(MSG_DEBUG, "WPS: Use OOB Device Password from own NFC Password Token"); 1434 pin = wpabuf_head(wps->wps->ap_nfc_dev_pw); 1435 pin_len = wpabuf_len(wps->wps->ap_nfc_dev_pw); 1436#endif /* CONFIG_WPS_NFC */ 1437 } else { 1438 pin = wps_registrar_get_pin(wps->wps->registrar, wps->uuid_e, 1439 &pin_len); 1440 if (pin && wps->dev_pw_id >= 0x10) { 1441 wpa_printf(MSG_DEBUG, "WPS: No match for OOB Device " 1442 "Password ID, but PIN found"); 1443 /* 1444 * See whether Enrollee is willing to use PIN instead. 1445 */ 1446 wps->dev_pw_id = DEV_PW_DEFAULT; 1447 } 1448 } 1449 if (pin == NULL) { 1450 wpa_printf(MSG_DEBUG, "WPS: No Device Password available for " 1451 "the Enrollee (context %p registrar %p)", 1452 wps->wps, wps->wps->registrar); 1453 wps_cb_pin_needed(wps->wps->registrar, wps->uuid_e, 1454 &wps->peer_dev); 1455 return -1; 1456 } 1457 1458 wps->dev_password = os_memdup(pin, pin_len); 1459 if (wps->dev_password == NULL) 1460 return -1; 1461 wps->dev_password_len = pin_len; 1462 1463 return 0; 1464} 1465 1466 1467static int wps_build_uuid_r(struct wps_data *wps, struct wpabuf *msg) 1468{ 1469 wpa_printf(MSG_DEBUG, "WPS: * UUID-R"); 1470 wpabuf_put_be16(msg, ATTR_UUID_R); 1471 wpabuf_put_be16(msg, WPS_UUID_LEN); 1472 wpabuf_put_data(msg, wps->uuid_r, WPS_UUID_LEN); 1473 return 0; 1474} 1475 1476 1477static int wps_build_r_hash(struct wps_data *wps, struct wpabuf *msg) 1478{ 1479 u8 *hash; 1480 const u8 *addr[4]; 1481 size_t len[4]; 1482 1483 if (random_get_bytes(wps->snonce, 2 * WPS_SECRET_NONCE_LEN) < 0) 1484 return -1; 1485 wpa_hexdump(MSG_DEBUG, "WPS: R-S1", wps->snonce, WPS_SECRET_NONCE_LEN); 1486 wpa_hexdump(MSG_DEBUG, "WPS: R-S2", 1487 wps->snonce + WPS_SECRET_NONCE_LEN, WPS_SECRET_NONCE_LEN); 1488 1489 if (wps->dh_pubkey_e == NULL || wps->dh_pubkey_r == NULL) { 1490 wpa_printf(MSG_DEBUG, "WPS: DH public keys not available for " 1491 "R-Hash derivation"); 1492 return -1; 1493 } 1494 1495 wpa_printf(MSG_DEBUG, "WPS: * R-Hash1"); 1496 wpabuf_put_be16(msg, ATTR_R_HASH1); 1497 wpabuf_put_be16(msg, SHA256_MAC_LEN); 1498 hash = wpabuf_put(msg, SHA256_MAC_LEN); 1499 /* R-Hash1 = HMAC_AuthKey(R-S1 || PSK1 || PK_E || PK_R) */ 1500 addr[0] = wps->snonce; 1501 len[0] = WPS_SECRET_NONCE_LEN; 1502 addr[1] = wps->psk1; 1503 len[1] = WPS_PSK_LEN; 1504 addr[2] = wpabuf_head(wps->dh_pubkey_e); 1505 len[2] = wpabuf_len(wps->dh_pubkey_e); 1506 addr[3] = wpabuf_head(wps->dh_pubkey_r); 1507 len[3] = wpabuf_len(wps->dh_pubkey_r); 1508 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 1509 wpa_hexdump(MSG_DEBUG, "WPS: R-Hash1", hash, SHA256_MAC_LEN); 1510 1511 wpa_printf(MSG_DEBUG, "WPS: * R-Hash2"); 1512 wpabuf_put_be16(msg, ATTR_R_HASH2); 1513 wpabuf_put_be16(msg, SHA256_MAC_LEN); 1514 hash = wpabuf_put(msg, SHA256_MAC_LEN); 1515 /* R-Hash2 = HMAC_AuthKey(R-S2 || PSK2 || PK_E || PK_R) */ 1516 addr[0] = wps->snonce + WPS_SECRET_NONCE_LEN; 1517 addr[1] = wps->psk2; 1518 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 1519 wpa_hexdump(MSG_DEBUG, "WPS: R-Hash2", hash, SHA256_MAC_LEN); 1520 1521 return 0; 1522} 1523 1524 1525static int wps_build_r_snonce1(struct wps_data *wps, struct wpabuf *msg) 1526{ 1527 wpa_printf(MSG_DEBUG, "WPS: * R-SNonce1"); 1528 wpabuf_put_be16(msg, ATTR_R_SNONCE1); 1529 wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN); 1530 wpabuf_put_data(msg, wps->snonce, WPS_SECRET_NONCE_LEN); 1531 return 0; 1532} 1533 1534 1535static int wps_build_r_snonce2(struct wps_data *wps, struct wpabuf *msg) 1536{ 1537 wpa_printf(MSG_DEBUG, "WPS: * R-SNonce2"); 1538 wpabuf_put_be16(msg, ATTR_R_SNONCE2); 1539 wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN); 1540 wpabuf_put_data(msg, wps->snonce + WPS_SECRET_NONCE_LEN, 1541 WPS_SECRET_NONCE_LEN); 1542 return 0; 1543} 1544 1545 1546static int wps_build_cred_network_idx(struct wpabuf *msg, 1547 const struct wps_credential *cred) 1548{ 1549 wpa_printf(MSG_DEBUG, "WPS: * Network Index (1)"); 1550 wpabuf_put_be16(msg, ATTR_NETWORK_INDEX); 1551 wpabuf_put_be16(msg, 1); 1552 wpabuf_put_u8(msg, 1); 1553 return 0; 1554} 1555 1556 1557static int wps_build_cred_ssid(struct wpabuf *msg, 1558 const struct wps_credential *cred) 1559{ 1560 wpa_printf(MSG_DEBUG, "WPS: * SSID"); 1561 wpa_hexdump_ascii(MSG_DEBUG, "WPS: SSID for Credential", 1562 cred->ssid, cred->ssid_len); 1563 wpabuf_put_be16(msg, ATTR_SSID); 1564 wpabuf_put_be16(msg, cred->ssid_len); 1565 wpabuf_put_data(msg, cred->ssid, cred->ssid_len); 1566 return 0; 1567} 1568 1569 1570static int wps_build_cred_auth_type(struct wpabuf *msg, 1571 const struct wps_credential *cred) 1572{ 1573 wpa_printf(MSG_DEBUG, "WPS: * Authentication Type (0x%x)", 1574 cred->auth_type); 1575 wpabuf_put_be16(msg, ATTR_AUTH_TYPE); 1576 wpabuf_put_be16(msg, 2); 1577 wpabuf_put_be16(msg, cred->auth_type); 1578 return 0; 1579} 1580 1581 1582static int wps_build_cred_encr_type(struct wpabuf *msg, 1583 const struct wps_credential *cred) 1584{ 1585 wpa_printf(MSG_DEBUG, "WPS: * Encryption Type (0x%x)", 1586 cred->encr_type); 1587 wpabuf_put_be16(msg, ATTR_ENCR_TYPE); 1588 wpabuf_put_be16(msg, 2); 1589 wpabuf_put_be16(msg, cred->encr_type); 1590 return 0; 1591} 1592 1593 1594static int wps_build_cred_network_key(struct wpabuf *msg, 1595 const struct wps_credential *cred) 1596{ 1597 wpa_printf(MSG_DEBUG, "WPS: * Network Key (len=%d)", 1598 (int) cred->key_len); 1599 wpa_hexdump_key(MSG_DEBUG, "WPS: Network Key", 1600 cred->key, cred->key_len); 1601 wpabuf_put_be16(msg, ATTR_NETWORK_KEY); 1602 wpabuf_put_be16(msg, cred->key_len); 1603 wpabuf_put_data(msg, cred->key, cred->key_len); 1604 return 0; 1605} 1606 1607 1608static int wps_build_credential(struct wpabuf *msg, 1609 const struct wps_credential *cred) 1610{ 1611 if (wps_build_cred_network_idx(msg, cred) || 1612 wps_build_cred_ssid(msg, cred) || 1613 wps_build_cred_auth_type(msg, cred) || 1614 wps_build_cred_encr_type(msg, cred) || 1615 wps_build_cred_network_key(msg, cred) || 1616 wps_build_mac_addr(msg, cred->mac_addr)) 1617 return -1; 1618 return 0; 1619} 1620 1621 1622int wps_build_credential_wrap(struct wpabuf *msg, 1623 const struct wps_credential *cred) 1624{ 1625 struct wpabuf *wbuf; 1626 wbuf = wpabuf_alloc(200); 1627 if (wbuf == NULL) 1628 return -1; 1629 if (wps_build_credential(wbuf, cred)) { 1630 wpabuf_clear_free(wbuf); 1631 return -1; 1632 } 1633 wpabuf_put_be16(msg, ATTR_CRED); 1634 wpabuf_put_be16(msg, wpabuf_len(wbuf)); 1635 wpabuf_put_buf(msg, wbuf); 1636 wpabuf_clear_free(wbuf); 1637 return 0; 1638} 1639 1640 1641int wps_build_cred(struct wps_data *wps, struct wpabuf *msg) 1642{ 1643 struct wpabuf *cred; 1644 struct wps_registrar *reg = wps->wps->registrar; 1645 1646 if (wps->wps->registrar->skip_cred_build) 1647 goto skip_cred_build; 1648 1649 wpa_printf(MSG_DEBUG, "WPS: * Credential"); 1650 if (wps->use_cred) { 1651 os_memcpy(&wps->cred, wps->use_cred, sizeof(wps->cred)); 1652 goto use_provided; 1653 } 1654 os_memset(&wps->cred, 0, sizeof(wps->cred)); 1655 1656 if (wps->peer_dev.multi_ap_ext == MULTI_AP_BACKHAUL_STA && 1657 reg->multi_ap_backhaul_ssid_len) { 1658 wpa_printf(MSG_DEBUG, "WPS: Use backhaul STA credentials"); 1659 os_memcpy(wps->cred.ssid, reg->multi_ap_backhaul_ssid, 1660 reg->multi_ap_backhaul_ssid_len); 1661 wps->cred.ssid_len = reg->multi_ap_backhaul_ssid_len; 1662 /* Backhaul is always WPA2PSK */ 1663 wps->cred.auth_type = WPS_AUTH_WPA2PSK; 1664 wps->cred.encr_type = WPS_ENCR_AES; 1665 /* Set MAC address in the Credential to be the Enrollee's MAC 1666 * address 1667 */ 1668 os_memcpy(wps->cred.mac_addr, wps->mac_addr_e, ETH_ALEN); 1669 if (reg->multi_ap_backhaul_network_key) { 1670 os_memcpy(wps->cred.key, 1671 reg->multi_ap_backhaul_network_key, 1672 reg->multi_ap_backhaul_network_key_len); 1673 wps->cred.key_len = 1674 reg->multi_ap_backhaul_network_key_len; 1675 } 1676 goto use_provided; 1677 } 1678 1679 os_memcpy(wps->cred.ssid, wps->wps->ssid, wps->wps->ssid_len); 1680 wps->cred.ssid_len = wps->wps->ssid_len; 1681 1682 /* Select the best authentication and encryption type */ 1683 wpa_printf(MSG_DEBUG, 1684 "WPS: Own auth types 0x%x - masked Enrollee auth types 0x%x", 1685 wps->wps->auth_types, wps->auth_type); 1686 if (wps->auth_type & WPS_AUTH_WPA2PSK) 1687 wps->auth_type = WPS_AUTH_WPA2PSK; 1688 else if (wps->auth_type & WPS_AUTH_WPAPSK) 1689 wps->auth_type = WPS_AUTH_WPAPSK; 1690 else if (wps->auth_type & WPS_AUTH_OPEN) 1691 wps->auth_type = WPS_AUTH_OPEN; 1692 else { 1693 wpa_printf(MSG_DEBUG, "WPS: Unsupported auth_type 0x%x", 1694 wps->auth_type); 1695 return -1; 1696 } 1697 wps->cred.auth_type = wps->auth_type; 1698 1699 wpa_printf(MSG_DEBUG, 1700 "WPS: Own encr types 0x%x (rsn: 0x%x, wpa: 0x%x) - masked Enrollee encr types 0x%x", 1701 wps->wps->encr_types, wps->wps->encr_types_rsn, 1702 wps->wps->encr_types_wpa, wps->encr_type); 1703 if (wps->wps->ap && wps->auth_type == WPS_AUTH_WPA2PSK) 1704 wps->encr_type &= wps->wps->encr_types_rsn; 1705 else if (wps->wps->ap && wps->auth_type == WPS_AUTH_WPAPSK) 1706 wps->encr_type &= wps->wps->encr_types_wpa; 1707 if (wps->auth_type == WPS_AUTH_WPA2PSK || 1708 wps->auth_type == WPS_AUTH_WPAPSK) { 1709 if (wps->encr_type & WPS_ENCR_AES) 1710 wps->encr_type = WPS_ENCR_AES; 1711 else if (wps->encr_type & WPS_ENCR_TKIP) 1712 wps->encr_type = WPS_ENCR_TKIP; 1713 else { 1714 wpa_printf(MSG_DEBUG, "WPS: No suitable encryption " 1715 "type for WPA/WPA2"); 1716 return -1; 1717 } 1718 } else { 1719 if (wps->encr_type & WPS_ENCR_NONE) 1720 wps->encr_type = WPS_ENCR_NONE; 1721#ifdef CONFIG_TESTING_OPTIONS 1722 else if (wps->encr_type & WPS_ENCR_WEP) 1723 wps->encr_type = WPS_ENCR_WEP; 1724#endif /* CONFIG_TESTING_OPTIONS */ 1725 else { 1726 wpa_printf(MSG_DEBUG, "WPS: No suitable encryption " 1727 "type for non-WPA/WPA2 mode"); 1728 return -1; 1729 } 1730 } 1731 wps->cred.encr_type = wps->encr_type; 1732 /* 1733 * Set MAC address in the Credential to be the Enrollee's MAC address 1734 */ 1735 os_memcpy(wps->cred.mac_addr, wps->mac_addr_e, ETH_ALEN); 1736 1737 if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->wps->ap && 1738 !wps->wps->registrar->disable_auto_conf) { 1739 u8 r[16]; 1740 /* Generate a random passphrase */ 1741 if (random_pool_ready() != 1 || 1742 random_get_bytes(r, sizeof(r)) < 0) { 1743 wpa_printf(MSG_INFO, 1744 "WPS: Could not generate random PSK"); 1745 return -1; 1746 } 1747 os_free(wps->new_psk); 1748 wps->new_psk = base64_encode(r, sizeof(r), &wps->new_psk_len); 1749 if (wps->new_psk == NULL) 1750 return -1; 1751 wps->new_psk_len--; /* remove newline */ 1752 while (wps->new_psk_len && 1753 wps->new_psk[wps->new_psk_len - 1] == '=') 1754 wps->new_psk_len--; 1755 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: Generated passphrase", 1756 wps->new_psk, wps->new_psk_len); 1757 os_memcpy(wps->cred.key, wps->new_psk, wps->new_psk_len); 1758 wps->cred.key_len = wps->new_psk_len; 1759 } else if (!wps->wps->registrar->force_per_enrollee_psk && 1760 wps->use_psk_key && wps->wps->psk_set) { 1761 char hex[65]; 1762 wpa_printf(MSG_DEBUG, "WPS: Use PSK format for Network Key"); 1763 wpa_snprintf_hex(hex, sizeof(hex), wps->wps->psk, 32); 1764 os_memcpy(wps->cred.key, hex, 32 * 2); 1765 wps->cred.key_len = 32 * 2; 1766 } else if (!wps->wps->registrar->force_per_enrollee_psk && 1767 wps->wps->network_key) { 1768 os_memcpy(wps->cred.key, wps->wps->network_key, 1769 wps->wps->network_key_len); 1770 wps->cred.key_len = wps->wps->network_key_len; 1771 } else if (wps->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) { 1772 char hex[65]; 1773 /* Generate a random per-device PSK */ 1774 os_free(wps->new_psk); 1775 wps->new_psk_len = 32; 1776 wps->new_psk = os_malloc(wps->new_psk_len); 1777 if (wps->new_psk == NULL) 1778 return -1; 1779 if (random_pool_ready() != 1 || 1780 random_get_bytes(wps->new_psk, wps->new_psk_len) < 0) { 1781 wpa_printf(MSG_INFO, 1782 "WPS: Could not generate random PSK"); 1783 os_free(wps->new_psk); 1784 wps->new_psk = NULL; 1785 return -1; 1786 } 1787 wpa_hexdump_key(MSG_DEBUG, "WPS: Generated per-device PSK", 1788 wps->new_psk, wps->new_psk_len); 1789 wpa_snprintf_hex(hex, sizeof(hex), wps->new_psk, 1790 wps->new_psk_len); 1791 os_memcpy(wps->cred.key, hex, wps->new_psk_len * 2); 1792 wps->cred.key_len = wps->new_psk_len * 2; 1793 } 1794 1795use_provided: 1796#ifdef CONFIG_WPS_TESTING 1797 if (wps_testing_dummy_cred) 1798 cred = wpabuf_alloc(200); 1799 else 1800 cred = NULL; 1801 if (cred) { 1802 struct wps_credential dummy; 1803 wpa_printf(MSG_DEBUG, "WPS: Add dummy credential"); 1804 os_memset(&dummy, 0, sizeof(dummy)); 1805 os_memcpy(dummy.ssid, "dummy", 5); 1806 dummy.ssid_len = 5; 1807 dummy.auth_type = WPS_AUTH_WPA2PSK; 1808 dummy.encr_type = WPS_ENCR_AES; 1809 os_memcpy(dummy.key, "dummy psk", 9); 1810 dummy.key_len = 9; 1811 os_memcpy(dummy.mac_addr, wps->mac_addr_e, ETH_ALEN); 1812 wps_build_credential(cred, &dummy); 1813 wpa_hexdump_buf(MSG_DEBUG, "WPS: Dummy Credential", cred); 1814 1815 wpabuf_put_be16(msg, ATTR_CRED); 1816 wpabuf_put_be16(msg, wpabuf_len(cred)); 1817 wpabuf_put_buf(msg, cred); 1818 1819 wpabuf_free(cred); 1820 } 1821#endif /* CONFIG_WPS_TESTING */ 1822 1823 cred = wpabuf_alloc(200); 1824 if (cred == NULL) 1825 return -1; 1826 1827 if (wps_build_credential(cred, &wps->cred)) { 1828 wpabuf_clear_free(cred); 1829 return -1; 1830 } 1831 1832 wpabuf_put_be16(msg, ATTR_CRED); 1833 wpabuf_put_be16(msg, wpabuf_len(cred)); 1834 wpabuf_put_buf(msg, cred); 1835 wpabuf_clear_free(cred); 1836 1837skip_cred_build: 1838 if (wps->wps->registrar->extra_cred) { 1839 wpa_printf(MSG_DEBUG, "WPS: * Credential (pre-configured)"); 1840 wpabuf_put_buf(msg, wps->wps->registrar->extra_cred); 1841 } 1842 1843 return 0; 1844} 1845 1846 1847static int wps_build_ap_settings(struct wps_data *wps, struct wpabuf *msg) 1848{ 1849 wpa_printf(MSG_DEBUG, "WPS: * AP Settings"); 1850 1851 if (wps_build_credential(msg, &wps->cred)) 1852 return -1; 1853 1854 return 0; 1855} 1856 1857 1858static struct wpabuf * wps_build_ap_cred(struct wps_data *wps) 1859{ 1860 struct wpabuf *msg, *plain; 1861 1862 msg = wpabuf_alloc(1000); 1863 if (msg == NULL) 1864 return NULL; 1865 1866 plain = wpabuf_alloc(200); 1867 if (plain == NULL) { 1868 wpabuf_free(msg); 1869 return NULL; 1870 } 1871 1872 if (wps_build_ap_settings(wps, plain)) { 1873 wpabuf_clear_free(plain); 1874 wpabuf_free(msg); 1875 return NULL; 1876 } 1877 1878 wpabuf_put_be16(msg, ATTR_CRED); 1879 wpabuf_put_be16(msg, wpabuf_len(plain)); 1880 wpabuf_put_buf(msg, plain); 1881 wpabuf_clear_free(plain); 1882 1883 return msg; 1884} 1885 1886 1887static struct wpabuf * wps_build_m2(struct wps_data *wps) 1888{ 1889 struct wpabuf *msg; 1890 int config_in_m2 = 0; 1891 1892 if (random_get_bytes(wps->nonce_r, WPS_NONCE_LEN) < 0) 1893 return NULL; 1894 wpa_hexdump(MSG_DEBUG, "WPS: Registrar Nonce", 1895 wps->nonce_r, WPS_NONCE_LEN); 1896 wpa_hexdump(MSG_DEBUG, "WPS: UUID-R", wps->uuid_r, WPS_UUID_LEN); 1897 1898 wpa_printf(MSG_DEBUG, "WPS: Building Message M2"); 1899 msg = wpabuf_alloc(1000); 1900 if (msg == NULL) 1901 return NULL; 1902 1903 if (wps_build_version(msg) || 1904 wps_build_msg_type(msg, WPS_M2) || 1905 wps_build_enrollee_nonce(wps, msg) || 1906 wps_build_registrar_nonce(wps, msg) || 1907 wps_build_uuid_r(wps, msg) || 1908 wps_build_public_key(wps, msg) || 1909 wps_derive_keys(wps) || 1910 wps_build_auth_type_flags(wps, msg) || 1911 wps_build_encr_type_flags(wps, msg) || 1912 wps_build_conn_type_flags(wps, msg) || 1913 wps_build_config_methods_r(wps->wps->registrar, msg) || 1914 wps_build_device_attrs(&wps->wps->dev, msg) || 1915 wps_build_rf_bands(&wps->wps->dev, msg, 1916 wps->wps->rf_band_cb(wps->wps->cb_ctx)) || 1917 wps_build_assoc_state(wps, msg) || 1918 wps_build_config_error(msg, WPS_CFG_NO_ERROR) || 1919 wps_build_dev_password_id(msg, wps->dev_pw_id) || 1920 wps_build_os_version(&wps->wps->dev, msg) || 1921 wps_build_wfa_ext(msg, 0, NULL, 0, 0)) { 1922 wpabuf_free(msg); 1923 return NULL; 1924 } 1925 1926#ifdef CONFIG_WPS_NFC 1927 if (wps->nfc_pw_token && wps->nfc_pw_token->pk_hash_provided_oob && 1928 wps->nfc_pw_token->pw_id == DEV_PW_NFC_CONNECTION_HANDOVER) { 1929 /* 1930 * Use abbreviated handshake since public key hash allowed 1931 * Enrollee to validate our public key similarly to how Enrollee 1932 * public key was validated. There is no need to validate Device 1933 * Password in this case. 1934 */ 1935 struct wpabuf *plain = wpabuf_alloc(500); 1936 if (plain == NULL || 1937 wps_build_cred(wps, plain) || 1938 wps_build_key_wrap_auth(wps, plain) || 1939 wps_build_encr_settings(wps, msg, plain)) { 1940 wpabuf_free(msg); 1941 wpabuf_clear_free(plain); 1942 return NULL; 1943 } 1944 wpabuf_clear_free(plain); 1945 config_in_m2 = 1; 1946 } 1947#endif /* CONFIG_WPS_NFC */ 1948 1949 if (wps_build_authenticator(wps, msg)) { 1950 wpabuf_free(msg); 1951 return NULL; 1952 } 1953 1954 wps->int_reg = 1; 1955 wps->state = config_in_m2 ? RECV_DONE : RECV_M3; 1956 return msg; 1957} 1958 1959 1960static struct wpabuf * wps_build_m2d(struct wps_data *wps) 1961{ 1962 struct wpabuf *msg; 1963 u16 err = wps->config_error; 1964 1965 wpa_printf(MSG_DEBUG, "WPS: Building Message M2D"); 1966 msg = wpabuf_alloc(1000); 1967 if (msg == NULL) 1968 return NULL; 1969 1970 if (wps->wps->ap && wps->wps->ap_setup_locked && 1971 err == WPS_CFG_NO_ERROR) 1972 err = WPS_CFG_SETUP_LOCKED; 1973 1974 if (wps_build_version(msg) || 1975 wps_build_msg_type(msg, WPS_M2D) || 1976 wps_build_enrollee_nonce(wps, msg) || 1977 wps_build_registrar_nonce(wps, msg) || 1978 wps_build_uuid_r(wps, msg) || 1979 wps_build_auth_type_flags(wps, msg) || 1980 wps_build_encr_type_flags(wps, msg) || 1981 wps_build_conn_type_flags(wps, msg) || 1982 wps_build_config_methods_r(wps->wps->registrar, msg) || 1983 wps_build_device_attrs(&wps->wps->dev, msg) || 1984 wps_build_rf_bands(&wps->wps->dev, msg, 1985 wps->wps->rf_band_cb(wps->wps->cb_ctx)) || 1986 wps_build_assoc_state(wps, msg) || 1987 wps_build_config_error(msg, err) || 1988 wps_build_os_version(&wps->wps->dev, msg) || 1989 wps_build_wfa_ext(msg, 0, NULL, 0, 0)) { 1990 wpabuf_free(msg); 1991 return NULL; 1992 } 1993 1994 wps->state = RECV_M2D_ACK; 1995 return msg; 1996} 1997 1998 1999static struct wpabuf * wps_build_m4(struct wps_data *wps) 2000{ 2001 struct wpabuf *msg, *plain; 2002 2003 wpa_printf(MSG_DEBUG, "WPS: Building Message M4"); 2004 2005 if (wps_derive_psk(wps, wps->dev_password, wps->dev_password_len) < 0) 2006 return NULL; 2007 2008 plain = wpabuf_alloc(200); 2009 if (plain == NULL) 2010 return NULL; 2011 2012 msg = wpabuf_alloc(1000); 2013 if (msg == NULL) { 2014 wpabuf_free(plain); 2015 return NULL; 2016 } 2017 2018 if (wps_build_version(msg) || 2019 wps_build_msg_type(msg, WPS_M4) || 2020 wps_build_enrollee_nonce(wps, msg) || 2021 wps_build_r_hash(wps, msg) || 2022 wps_build_r_snonce1(wps, plain) || 2023 wps_build_key_wrap_auth(wps, plain) || 2024 wps_build_encr_settings(wps, msg, plain) || 2025 wps_build_wfa_ext(msg, 0, NULL, 0, 0) || 2026 wps_build_authenticator(wps, msg)) { 2027 wpabuf_clear_free(plain); 2028 wpabuf_free(msg); 2029 return NULL; 2030 } 2031 wpabuf_clear_free(plain); 2032 2033 wps->state = RECV_M5; 2034 return msg; 2035} 2036 2037 2038static struct wpabuf * wps_build_m6(struct wps_data *wps) 2039{ 2040 struct wpabuf *msg, *plain; 2041 2042 wpa_printf(MSG_DEBUG, "WPS: Building Message M6"); 2043 2044 plain = wpabuf_alloc(200); 2045 if (plain == NULL) 2046 return NULL; 2047 2048 msg = wpabuf_alloc(1000); 2049 if (msg == NULL) { 2050 wpabuf_free(plain); 2051 return NULL; 2052 } 2053 2054 if (wps_build_version(msg) || 2055 wps_build_msg_type(msg, WPS_M6) || 2056 wps_build_enrollee_nonce(wps, msg) || 2057 wps_build_r_snonce2(wps, plain) || 2058 wps_build_key_wrap_auth(wps, plain) || 2059 wps_build_encr_settings(wps, msg, plain) || 2060 wps_build_wfa_ext(msg, 0, NULL, 0, 0) || 2061 wps_build_authenticator(wps, msg)) { 2062 wpabuf_clear_free(plain); 2063 wpabuf_free(msg); 2064 return NULL; 2065 } 2066 wpabuf_clear_free(plain); 2067 2068 wps->wps_pin_revealed = 1; 2069 wps->state = RECV_M7; 2070 return msg; 2071} 2072 2073 2074static struct wpabuf * wps_build_m8(struct wps_data *wps) 2075{ 2076 struct wpabuf *msg, *plain; 2077 2078 wpa_printf(MSG_DEBUG, "WPS: Building Message M8"); 2079 2080 plain = wpabuf_alloc(500); 2081 if (plain == NULL) 2082 return NULL; 2083 2084 msg = wpabuf_alloc(1000); 2085 if (msg == NULL) { 2086 wpabuf_free(plain); 2087 return NULL; 2088 } 2089 2090 if (wps_build_version(msg) || 2091 wps_build_msg_type(msg, WPS_M8) || 2092 wps_build_enrollee_nonce(wps, msg) || 2093 ((wps->wps->ap || wps->er) && wps_build_cred(wps, plain)) || 2094 (!wps->wps->ap && !wps->er && wps_build_ap_settings(wps, plain)) || 2095 wps_build_key_wrap_auth(wps, plain) || 2096 wps_build_encr_settings(wps, msg, plain) || 2097 wps_build_wfa_ext(msg, 0, NULL, 0, 0) || 2098 wps_build_authenticator(wps, msg)) { 2099 wpabuf_clear_free(plain); 2100 wpabuf_clear_free(msg); 2101 return NULL; 2102 } 2103 wpabuf_clear_free(plain); 2104 2105 wps->state = RECV_DONE; 2106 return msg; 2107} 2108 2109 2110struct wpabuf * wps_registrar_get_msg(struct wps_data *wps, 2111 enum wsc_op_code *op_code) 2112{ 2113 struct wpabuf *msg; 2114 2115#ifdef CONFIG_WPS_UPNP 2116 if (!wps->int_reg && wps->wps->wps_upnp) { 2117 struct upnp_pending_message *p, *prev = NULL; 2118 if (wps->ext_reg > 1) 2119 wps_registrar_free_pending_m2(wps->wps); 2120 p = wps->wps->upnp_msgs; 2121 /* TODO: check pending message MAC address */ 2122 while (p && p->next) { 2123 prev = p; 2124 p = p->next; 2125 } 2126 if (p) { 2127 wpa_printf(MSG_DEBUG, "WPS: Use pending message from " 2128 "UPnP"); 2129 if (prev) 2130 prev->next = NULL; 2131 else 2132 wps->wps->upnp_msgs = NULL; 2133 msg = p->msg; 2134 switch (p->type) { 2135 case WPS_WSC_ACK: 2136 *op_code = WSC_ACK; 2137 break; 2138 case WPS_WSC_NACK: 2139 *op_code = WSC_NACK; 2140 break; 2141 default: 2142 *op_code = WSC_MSG; 2143 break; 2144 } 2145 os_free(p); 2146 if (wps->ext_reg == 0) 2147 wps->ext_reg = 1; 2148 return msg; 2149 } 2150 } 2151 if (wps->ext_reg) { 2152 wpa_printf(MSG_DEBUG, "WPS: Using external Registrar, but no " 2153 "pending message available"); 2154 return NULL; 2155 } 2156#endif /* CONFIG_WPS_UPNP */ 2157 2158 switch (wps->state) { 2159 case SEND_M2: 2160 if (wps_get_dev_password(wps) < 0) 2161 msg = wps_build_m2d(wps); 2162 else 2163 msg = wps_build_m2(wps); 2164 *op_code = WSC_MSG; 2165 break; 2166 case SEND_M2D: 2167 msg = wps_build_m2d(wps); 2168 *op_code = WSC_MSG; 2169 break; 2170 case SEND_M4: 2171 msg = wps_build_m4(wps); 2172 *op_code = WSC_MSG; 2173 break; 2174 case SEND_M6: 2175 msg = wps_build_m6(wps); 2176 *op_code = WSC_MSG; 2177 break; 2178 case SEND_M8: 2179 msg = wps_build_m8(wps); 2180 *op_code = WSC_MSG; 2181 break; 2182 case RECV_DONE: 2183 msg = wps_build_wsc_ack(wps); 2184 *op_code = WSC_ACK; 2185 break; 2186 case SEND_WSC_NACK: 2187 msg = wps_build_wsc_nack(wps); 2188 *op_code = WSC_NACK; 2189 break; 2190 default: 2191 wpa_printf(MSG_DEBUG, "WPS: Unsupported state %d for building " 2192 "a message", wps->state); 2193 msg = NULL; 2194 break; 2195 } 2196 2197 if (*op_code == WSC_MSG && msg) { 2198 /* Save a copy of the last message for Authenticator derivation 2199 */ 2200 wpabuf_free(wps->last_msg); 2201 wps->last_msg = wpabuf_dup(msg); 2202 } 2203 2204 return msg; 2205} 2206 2207 2208static int wps_process_enrollee_nonce(struct wps_data *wps, const u8 *e_nonce) 2209{ 2210 if (e_nonce == NULL) { 2211 wpa_printf(MSG_DEBUG, "WPS: No Enrollee Nonce received"); 2212 return -1; 2213 } 2214 2215 os_memcpy(wps->nonce_e, e_nonce, WPS_NONCE_LEN); 2216 wpa_hexdump(MSG_DEBUG, "WPS: Enrollee Nonce", 2217 wps->nonce_e, WPS_NONCE_LEN); 2218 2219 return 0; 2220} 2221 2222 2223static int wps_process_registrar_nonce(struct wps_data *wps, const u8 *r_nonce) 2224{ 2225 if (r_nonce == NULL) { 2226 wpa_printf(MSG_DEBUG, "WPS: No Registrar Nonce received"); 2227 return -1; 2228 } 2229 2230 if (os_memcmp(wps->nonce_r, r_nonce, WPS_NONCE_LEN) != 0) { 2231 wpa_printf(MSG_DEBUG, "WPS: Invalid Registrar Nonce received"); 2232 return -1; 2233 } 2234 2235 return 0; 2236} 2237 2238 2239static int wps_process_uuid_e(struct wps_data *wps, const u8 *uuid_e) 2240{ 2241 if (uuid_e == NULL) { 2242 wpa_printf(MSG_DEBUG, "WPS: No UUID-E received"); 2243 return -1; 2244 } 2245 2246 os_memcpy(wps->uuid_e, uuid_e, WPS_UUID_LEN); 2247 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E", wps->uuid_e, WPS_UUID_LEN); 2248 2249 return 0; 2250} 2251 2252 2253static int wps_process_dev_password_id(struct wps_data *wps, const u8 *pw_id) 2254{ 2255 if (pw_id == NULL) { 2256 wpa_printf(MSG_DEBUG, "WPS: No Device Password ID received"); 2257 return -1; 2258 } 2259 2260 wps->dev_pw_id = WPA_GET_BE16(pw_id); 2261 wpa_printf(MSG_DEBUG, "WPS: Device Password ID %d", wps->dev_pw_id); 2262 2263 return 0; 2264} 2265 2266 2267static int wps_process_e_hash1(struct wps_data *wps, const u8 *e_hash1) 2268{ 2269 if (e_hash1 == NULL) { 2270 wpa_printf(MSG_DEBUG, "WPS: No E-Hash1 received"); 2271 return -1; 2272 } 2273 2274 os_memcpy(wps->peer_hash1, e_hash1, WPS_HASH_LEN); 2275 wpa_hexdump(MSG_DEBUG, "WPS: E-Hash1", wps->peer_hash1, WPS_HASH_LEN); 2276 2277 return 0; 2278} 2279 2280 2281static int wps_process_e_hash2(struct wps_data *wps, const u8 *e_hash2) 2282{ 2283 if (e_hash2 == NULL) { 2284 wpa_printf(MSG_DEBUG, "WPS: No E-Hash2 received"); 2285 return -1; 2286 } 2287 2288 os_memcpy(wps->peer_hash2, e_hash2, WPS_HASH_LEN); 2289 wpa_hexdump(MSG_DEBUG, "WPS: E-Hash2", wps->peer_hash2, WPS_HASH_LEN); 2290 2291 return 0; 2292} 2293 2294 2295static int wps_process_e_snonce1(struct wps_data *wps, const u8 *e_snonce1) 2296{ 2297 u8 hash[SHA256_MAC_LEN]; 2298 const u8 *addr[4]; 2299 size_t len[4]; 2300 2301 if (e_snonce1 == NULL) { 2302 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce1 received"); 2303 return -1; 2304 } 2305 2306 wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce1", e_snonce1, 2307 WPS_SECRET_NONCE_LEN); 2308 2309 /* E-Hash1 = HMAC_AuthKey(E-S1 || PSK1 || PK_E || PK_R) */ 2310 addr[0] = e_snonce1; 2311 len[0] = WPS_SECRET_NONCE_LEN; 2312 addr[1] = wps->psk1; 2313 len[1] = WPS_PSK_LEN; 2314 addr[2] = wpabuf_head(wps->dh_pubkey_e); 2315 len[2] = wpabuf_len(wps->dh_pubkey_e); 2316 addr[3] = wpabuf_head(wps->dh_pubkey_r); 2317 len[3] = wpabuf_len(wps->dh_pubkey_r); 2318 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 2319 2320 if (os_memcmp_const(wps->peer_hash1, hash, WPS_HASH_LEN) != 0) { 2321 wpa_printf(MSG_DEBUG, "WPS: E-Hash1 derived from E-S1 does " 2322 "not match with the pre-committed value"); 2323 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE; 2324 wps_pwd_auth_fail_event(wps->wps, 0, 1, wps->mac_addr_e); 2325 return -1; 2326 } 2327 2328 wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the first " 2329 "half of the device password"); 2330 2331 return 0; 2332} 2333 2334 2335static int wps_process_e_snonce2(struct wps_data *wps, const u8 *e_snonce2) 2336{ 2337 u8 hash[SHA256_MAC_LEN]; 2338 const u8 *addr[4]; 2339 size_t len[4]; 2340 2341 if (e_snonce2 == NULL) { 2342 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce2 received"); 2343 return -1; 2344 } 2345 2346 wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce2", e_snonce2, 2347 WPS_SECRET_NONCE_LEN); 2348 2349 /* E-Hash2 = HMAC_AuthKey(E-S2 || PSK2 || PK_E || PK_R) */ 2350 addr[0] = e_snonce2; 2351 len[0] = WPS_SECRET_NONCE_LEN; 2352 addr[1] = wps->psk2; 2353 len[1] = WPS_PSK_LEN; 2354 addr[2] = wpabuf_head(wps->dh_pubkey_e); 2355 len[2] = wpabuf_len(wps->dh_pubkey_e); 2356 addr[3] = wpabuf_head(wps->dh_pubkey_r); 2357 len[3] = wpabuf_len(wps->dh_pubkey_r); 2358 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 2359 2360 if (os_memcmp_const(wps->peer_hash2, hash, WPS_HASH_LEN) != 0) { 2361 wpa_printf(MSG_DEBUG, "WPS: E-Hash2 derived from E-S2 does " 2362 "not match with the pre-committed value"); 2363 wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e); 2364 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE; 2365 wps_pwd_auth_fail_event(wps->wps, 0, 2, wps->mac_addr_e); 2366 return -1; 2367 } 2368 2369 wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the second " 2370 "half of the device password"); 2371 wps->wps_pin_revealed = 0; 2372 wps_registrar_unlock_pin(wps->wps->registrar, wps->uuid_e); 2373 2374 /* 2375 * In case wildcard PIN is used and WPS handshake succeeds in the first 2376 * attempt, wps_registrar_unlock_pin() would not free the PIN, so make 2377 * sure the PIN gets invalidated here. 2378 */ 2379 wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e); 2380 2381 return 0; 2382} 2383 2384 2385static int wps_process_mac_addr(struct wps_data *wps, const u8 *mac_addr) 2386{ 2387 if (mac_addr == NULL) { 2388 wpa_printf(MSG_DEBUG, "WPS: No MAC Address received"); 2389 return -1; 2390 } 2391 2392 wpa_printf(MSG_DEBUG, "WPS: Enrollee MAC Address " MACSTR, 2393 MAC2STR(mac_addr)); 2394 os_memcpy(wps->mac_addr_e, mac_addr, ETH_ALEN); 2395 os_memcpy(wps->peer_dev.mac_addr, mac_addr, ETH_ALEN); 2396 2397 return 0; 2398} 2399 2400 2401static int wps_process_pubkey(struct wps_data *wps, const u8 *pk, 2402 size_t pk_len) 2403{ 2404 if (pk == NULL || pk_len == 0) { 2405 wpa_printf(MSG_DEBUG, "WPS: No Public Key received"); 2406 return -1; 2407 } 2408 2409 wpabuf_free(wps->dh_pubkey_e); 2410 wps->dh_pubkey_e = wpabuf_alloc_copy(pk, pk_len); 2411 if (wps->dh_pubkey_e == NULL) 2412 return -1; 2413 2414 return 0; 2415} 2416 2417 2418static int wps_process_auth_type_flags(struct wps_data *wps, const u8 *auth) 2419{ 2420 u16 auth_types; 2421 2422 if (auth == NULL) { 2423 wpa_printf(MSG_DEBUG, "WPS: No Authentication Type flags " 2424 "received"); 2425 return -1; 2426 } 2427 2428 auth_types = WPA_GET_BE16(auth); 2429 2430 wpa_printf(MSG_DEBUG, "WPS: Enrollee Authentication Type flags 0x%x", 2431 auth_types); 2432#ifdef WPS_WORKAROUNDS 2433 /* 2434 * Some deployed implementations seem to advertise incorrect information 2435 * in this attribute. A value of 0x1b (WPA2 + WPA + WPAPSK + OPEN, but 2436 * no WPA2PSK) has been reported to be used. Add WPA2PSK to the list to 2437 * avoid issues with building Credentials that do not use the strongest 2438 * actually supported authentication option (that device does support 2439 * WPA2PSK even when it does not claim it here). 2440 */ 2441 if ((auth_types & 2442 (WPS_AUTH_WPA2 | WPS_AUTH_WPA2PSK | WPS_AUTH_WPAPSK)) == 2443 (WPS_AUTH_WPA2 | WPS_AUTH_WPAPSK)) { 2444 wpa_printf(MSG_DEBUG, 2445 "WPS: Workaround - assume Enrollee supports WPA2PSK based on claimed WPA2 support"); 2446 auth_types |= WPS_AUTH_WPA2PSK; 2447 } 2448#endif /* WPS_WORKAROUNDS */ 2449 wps->auth_type = wps->wps->auth_types & auth_types; 2450 if (wps->auth_type == 0) { 2451 wpa_printf(MSG_DEBUG, "WPS: No match in supported " 2452 "authentication types (own 0x%x Enrollee 0x%x)", 2453 wps->wps->auth_types, auth_types); 2454#ifdef WPS_WORKAROUNDS 2455 /* 2456 * Some deployed implementations seem to advertise incorrect 2457 * information in this attribute. For example, Linksys WRT350N 2458 * seems to have a byteorder bug that breaks this negotiation. 2459 * In order to interoperate with existing implementations, 2460 * assume that the Enrollee supports everything we do. 2461 */ 2462 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee " 2463 "does not advertise supported authentication types " 2464 "correctly"); 2465 wps->auth_type = wps->wps->auth_types; 2466#else /* WPS_WORKAROUNDS */ 2467 return -1; 2468#endif /* WPS_WORKAROUNDS */ 2469 } 2470 2471 return 0; 2472} 2473 2474 2475static int wps_process_encr_type_flags(struct wps_data *wps, const u8 *encr) 2476{ 2477 u16 encr_types; 2478 2479 if (encr == NULL) { 2480 wpa_printf(MSG_DEBUG, "WPS: No Encryption Type flags " 2481 "received"); 2482 return -1; 2483 } 2484 2485 encr_types = WPA_GET_BE16(encr); 2486 2487 wpa_printf(MSG_DEBUG, "WPS: Enrollee Encryption Type flags 0x%x", 2488 encr_types); 2489 wps->encr_type = wps->wps->encr_types & encr_types; 2490 if (wps->encr_type == 0) { 2491 wpa_printf(MSG_DEBUG, "WPS: No match in supported " 2492 "encryption types (own 0x%x Enrollee 0x%x)", 2493 wps->wps->encr_types, encr_types); 2494#ifdef WPS_WORKAROUNDS 2495 /* 2496 * Some deployed implementations seem to advertise incorrect 2497 * information in this attribute. For example, Linksys WRT350N 2498 * seems to have a byteorder bug that breaks this negotiation. 2499 * In order to interoperate with existing implementations, 2500 * assume that the Enrollee supports everything we do. 2501 */ 2502 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee " 2503 "does not advertise supported encryption types " 2504 "correctly"); 2505 wps->encr_type = wps->wps->encr_types; 2506#else /* WPS_WORKAROUNDS */ 2507 return -1; 2508#endif /* WPS_WORKAROUNDS */ 2509 } 2510 2511 return 0; 2512} 2513 2514 2515static int wps_process_conn_type_flags(struct wps_data *wps, const u8 *conn) 2516{ 2517 if (conn == NULL) { 2518 wpa_printf(MSG_DEBUG, "WPS: No Connection Type flags " 2519 "received"); 2520 return -1; 2521 } 2522 2523 wpa_printf(MSG_DEBUG, "WPS: Enrollee Connection Type flags 0x%x", 2524 *conn); 2525 2526 return 0; 2527} 2528 2529 2530static int wps_process_config_methods(struct wps_data *wps, const u8 *methods) 2531{ 2532 u16 m; 2533 2534 if (methods == NULL) { 2535 wpa_printf(MSG_DEBUG, "WPS: No Config Methods received"); 2536 return -1; 2537 } 2538 2539 m = WPA_GET_BE16(methods); 2540 2541 wpa_printf(MSG_DEBUG, "WPS: Enrollee Config Methods 0x%x" 2542 "%s%s%s%s%s%s%s%s%s", m, 2543 m & WPS_CONFIG_USBA ? " [USBA]" : "", 2544 m & WPS_CONFIG_ETHERNET ? " [Ethernet]" : "", 2545 m & WPS_CONFIG_LABEL ? " [Label]" : "", 2546 m & WPS_CONFIG_DISPLAY ? " [Display]" : "", 2547 m & WPS_CONFIG_EXT_NFC_TOKEN ? " [Ext NFC Token]" : "", 2548 m & WPS_CONFIG_INT_NFC_TOKEN ? " [Int NFC Token]" : "", 2549 m & WPS_CONFIG_NFC_INTERFACE ? " [NFC]" : "", 2550 m & WPS_CONFIG_PUSHBUTTON ? " [PBC]" : "", 2551 m & WPS_CONFIG_KEYPAD ? " [Keypad]" : ""); 2552 2553 if (!(m & WPS_CONFIG_DISPLAY) && !wps->use_psk_key) { 2554 /* 2555 * The Enrollee does not have a display so it is unlikely to be 2556 * able to show the passphrase to a user and as such, could 2557 * benefit from receiving PSK to reduce key derivation time. 2558 */ 2559 wpa_printf(MSG_DEBUG, "WPS: Prefer PSK format key due to " 2560 "Enrollee not supporting display"); 2561 wps->use_psk_key = 1; 2562 } 2563 2564 return 0; 2565} 2566 2567 2568static int wps_process_wps_state(struct wps_data *wps, const u8 *state) 2569{ 2570 if (state == NULL) { 2571 wpa_printf(MSG_DEBUG, "WPS: No Wi-Fi Protected Setup State " 2572 "received"); 2573 return -1; 2574 } 2575 2576 wpa_printf(MSG_DEBUG, "WPS: Enrollee Wi-Fi Protected Setup State %d", 2577 *state); 2578 2579 return 0; 2580} 2581 2582 2583static int wps_process_assoc_state(struct wps_data *wps, const u8 *assoc) 2584{ 2585 u16 a; 2586 2587 if (assoc == NULL) { 2588 wpa_printf(MSG_DEBUG, "WPS: No Association State received"); 2589 return -1; 2590 } 2591 2592 a = WPA_GET_BE16(assoc); 2593 wpa_printf(MSG_DEBUG, "WPS: Enrollee Association State %d", a); 2594 2595 return 0; 2596} 2597 2598 2599static int wps_process_config_error(struct wps_data *wps, const u8 *err) 2600{ 2601 u16 e; 2602 2603 if (err == NULL) { 2604 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error received"); 2605 return -1; 2606 } 2607 2608 e = WPA_GET_BE16(err); 2609 wpa_printf(MSG_DEBUG, "WPS: Enrollee Configuration Error %d", e); 2610 2611 return 0; 2612} 2613 2614 2615static int wps_registrar_p2p_dev_addr_match(struct wps_data *wps) 2616{ 2617#ifdef CONFIG_P2P 2618 struct wps_registrar *reg = wps->wps->registrar; 2619 2620 if (is_zero_ether_addr(reg->p2p_dev_addr)) 2621 return 1; /* no filtering in use */ 2622 2623 if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) != 0) { 2624 wpa_printf(MSG_DEBUG, "WPS: No match on P2P Device Address " 2625 "filtering for PBC: expected " MACSTR " was " 2626 MACSTR " - indicate PBC session overlap", 2627 MAC2STR(reg->p2p_dev_addr), 2628 MAC2STR(wps->p2p_dev_addr)); 2629 return 0; 2630 } 2631#endif /* CONFIG_P2P */ 2632 return 1; 2633} 2634 2635 2636static int wps_registrar_skip_overlap(struct wps_data *wps) 2637{ 2638#ifdef CONFIG_P2P 2639 struct wps_registrar *reg = wps->wps->registrar; 2640 2641 if (is_zero_ether_addr(reg->p2p_dev_addr)) 2642 return 0; /* no specific Enrollee selected */ 2643 2644 if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) == 0) { 2645 wpa_printf(MSG_DEBUG, "WPS: Skip PBC overlap due to selected " 2646 "Enrollee match"); 2647 return 1; 2648 } 2649#endif /* CONFIG_P2P */ 2650 return 0; 2651} 2652 2653 2654static enum wps_process_res wps_process_m1(struct wps_data *wps, 2655 struct wps_parse_attr *attr) 2656{ 2657 wpa_printf(MSG_DEBUG, "WPS: Received M1"); 2658 2659 if (wps->state != RECV_M1) { 2660 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2661 "receiving M1", wps->state); 2662 return WPS_FAILURE; 2663 } 2664 2665 if (wps_process_uuid_e(wps, attr->uuid_e) || 2666 wps_process_mac_addr(wps, attr->mac_addr) || 2667 wps_process_enrollee_nonce(wps, attr->enrollee_nonce) || 2668 wps_process_pubkey(wps, attr->public_key, attr->public_key_len) || 2669 wps_process_auth_type_flags(wps, attr->auth_type_flags) || 2670 wps_process_encr_type_flags(wps, attr->encr_type_flags) || 2671 wps_process_conn_type_flags(wps, attr->conn_type_flags) || 2672 wps_process_config_methods(wps, attr->config_methods) || 2673 wps_process_wps_state(wps, attr->wps_state) || 2674 wps_process_device_attrs(&wps->peer_dev, attr) || 2675 wps_process_rf_bands(&wps->peer_dev, attr->rf_bands) || 2676 wps_process_assoc_state(wps, attr->assoc_state) || 2677 wps_process_dev_password_id(wps, attr->dev_password_id) || 2678 wps_process_config_error(wps, attr->config_error) || 2679 wps_process_os_version(&wps->peer_dev, attr->os_version)) 2680 return WPS_FAILURE; 2681 2682 if (wps->dev_pw_id < 0x10 && 2683 wps->dev_pw_id != DEV_PW_DEFAULT && 2684 wps->dev_pw_id != DEV_PW_P2PS_DEFAULT && 2685 wps->dev_pw_id != DEV_PW_USER_SPECIFIED && 2686 wps->dev_pw_id != DEV_PW_MACHINE_SPECIFIED && 2687 wps->dev_pw_id != DEV_PW_REGISTRAR_SPECIFIED && 2688#ifdef CONFIG_WPS_NFC 2689 wps->dev_pw_id != DEV_PW_NFC_CONNECTION_HANDOVER && 2690#endif /* CONFIG_WPS_NFC */ 2691 (wps->dev_pw_id != DEV_PW_PUSHBUTTON || 2692 !wps->wps->registrar->pbc)) { 2693 wpa_printf(MSG_DEBUG, "WPS: Unsupported Device Password ID %d", 2694 wps->dev_pw_id); 2695 wps->state = SEND_M2D; 2696 return WPS_CONTINUE; 2697 } 2698 2699#ifdef CONFIG_WPS_NFC 2700 if (wps->dev_pw_id >= 0x10 || 2701 wps->dev_pw_id == DEV_PW_NFC_CONNECTION_HANDOVER) { 2702 struct wps_nfc_pw_token *token; 2703 const u8 *addr[1]; 2704 u8 hash[WPS_HASH_LEN]; 2705 2706 wpa_printf(MSG_DEBUG, "WPS: Searching for NFC token match for id=%d (ctx %p registrar %p)", 2707 wps->dev_pw_id, wps->wps, wps->wps->registrar); 2708 token = wps_get_nfc_pw_token( 2709 &wps->wps->registrar->nfc_pw_tokens, wps->dev_pw_id); 2710 if (token && token->peer_pk_hash_known) { 2711 size_t len; 2712 2713 wpa_printf(MSG_DEBUG, "WPS: Found matching NFC " 2714 "Password Token"); 2715 dl_list_del(&token->list); 2716 wps->nfc_pw_token = token; 2717 2718 addr[0] = attr->public_key; 2719 len = attr->public_key_len; 2720 sha256_vector(1, addr, &len, hash); 2721 if (os_memcmp_const(hash, 2722 wps->nfc_pw_token->pubkey_hash, 2723 WPS_OOB_PUBKEY_HASH_LEN) != 0) { 2724 wpa_printf(MSG_ERROR, "WPS: Public Key hash " 2725 "mismatch"); 2726 wps->state = SEND_M2D; 2727 wps->config_error = 2728 WPS_CFG_PUBLIC_KEY_HASH_MISMATCH; 2729 return WPS_CONTINUE; 2730 } 2731 } else if (token) { 2732 wpa_printf(MSG_DEBUG, "WPS: Found matching NFC " 2733 "Password Token (no peer PK hash)"); 2734 wps->nfc_pw_token = token; 2735 } else if (wps->dev_pw_id >= 0x10 && 2736 wps->wps->ap_nfc_dev_pw_id == wps->dev_pw_id && 2737 wps->wps->ap_nfc_dev_pw) { 2738 wpa_printf(MSG_DEBUG, "WPS: Found match with own NFC Password Token"); 2739 } 2740 } 2741#endif /* CONFIG_WPS_NFC */ 2742 2743 if (wps->dev_pw_id == DEV_PW_PUSHBUTTON) { 2744 if ((wps->wps->registrar->force_pbc_overlap || 2745 wps_registrar_pbc_overlap(wps->wps->registrar, 2746 wps->mac_addr_e, wps->uuid_e) || 2747 !wps_registrar_p2p_dev_addr_match(wps)) && 2748 !wps_registrar_skip_overlap(wps)) { 2749 wpa_printf(MSG_DEBUG, "WPS: PBC overlap - deny PBC " 2750 "negotiation"); 2751 wps->state = SEND_M2D; 2752 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2753 wps_pbc_overlap_event(wps->wps); 2754 wps_fail_event(wps->wps, WPS_M1, 2755 WPS_CFG_MULTIPLE_PBC_DETECTED, 2756 WPS_EI_NO_ERROR, wps->mac_addr_e); 2757 wps->wps->registrar->force_pbc_overlap = 1; 2758 return WPS_CONTINUE; 2759 } 2760 wps_registrar_add_pbc_session(wps->wps->registrar, 2761 wps->mac_addr_e, wps->uuid_e); 2762 wps->pbc = 1; 2763 } 2764 2765#ifdef WPS_WORKAROUNDS 2766 /* 2767 * It looks like Mac OS X 10.6.3 and 10.6.4 do not like Network Key in 2768 * passphrase format. To avoid interop issues, force PSK format to be 2769 * used. 2770 */ 2771 if (!wps->use_psk_key && 2772 wps->peer_dev.manufacturer && 2773 os_strncmp(wps->peer_dev.manufacturer, "Apple ", 6) == 0 && 2774 wps->peer_dev.model_name && 2775 os_strcmp(wps->peer_dev.model_name, "AirPort") == 0) { 2776 wpa_printf(MSG_DEBUG, "WPS: Workaround - Force Network Key in " 2777 "PSK format"); 2778 wps->use_psk_key = 1; 2779 } 2780#endif /* WPS_WORKAROUNDS */ 2781 wps_process_vendor_ext_m1(&wps->peer_dev, attr->multi_ap_ext); 2782 2783 wps->state = SEND_M2; 2784 return WPS_CONTINUE; 2785} 2786 2787 2788static enum wps_process_res wps_process_m3(struct wps_data *wps, 2789 const struct wpabuf *msg, 2790 struct wps_parse_attr *attr) 2791{ 2792 wpa_printf(MSG_DEBUG, "WPS: Received M3"); 2793 2794 if (wps->state != RECV_M3) { 2795 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2796 "receiving M3", wps->state); 2797 wps->state = SEND_WSC_NACK; 2798 return WPS_CONTINUE; 2799 } 2800 2801 if (wps->pbc && wps->wps->registrar->force_pbc_overlap && 2802 !wps_registrar_skip_overlap(wps)) { 2803 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC " 2804 "session overlap"); 2805 wps->state = SEND_WSC_NACK; 2806 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2807 return WPS_CONTINUE; 2808 } 2809 2810 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) || 2811 wps_process_authenticator(wps, attr->authenticator, msg) || 2812 wps_process_e_hash1(wps, attr->e_hash1) || 2813 wps_process_e_hash2(wps, attr->e_hash2)) { 2814 wps->state = SEND_WSC_NACK; 2815 return WPS_CONTINUE; 2816 } 2817 2818 wps->state = SEND_M4; 2819 return WPS_CONTINUE; 2820} 2821 2822 2823static enum wps_process_res wps_process_m5(struct wps_data *wps, 2824 const struct wpabuf *msg, 2825 struct wps_parse_attr *attr) 2826{ 2827 struct wpabuf *decrypted; 2828 struct wps_parse_attr eattr; 2829 2830 wpa_printf(MSG_DEBUG, "WPS: Received M5"); 2831 2832 if (wps->state != RECV_M5) { 2833 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2834 "receiving M5", wps->state); 2835 wps->state = SEND_WSC_NACK; 2836 return WPS_CONTINUE; 2837 } 2838 2839 if (wps->pbc && wps->wps->registrar->force_pbc_overlap && 2840 !wps_registrar_skip_overlap(wps)) { 2841 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC " 2842 "session overlap"); 2843 wps->state = SEND_WSC_NACK; 2844 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2845 return WPS_CONTINUE; 2846 } 2847 2848 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) || 2849 wps_process_authenticator(wps, attr->authenticator, msg)) { 2850 wps->state = SEND_WSC_NACK; 2851 return WPS_CONTINUE; 2852 } 2853 2854 decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings, 2855 attr->encr_settings_len); 2856 if (decrypted == NULL) { 2857 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypted Encrypted " 2858 "Settings attribute"); 2859 wps->state = SEND_WSC_NACK; 2860 return WPS_CONTINUE; 2861 } 2862 2863 if (wps_validate_m5_encr(decrypted, attr->version2 != NULL) < 0) { 2864 wpabuf_clear_free(decrypted); 2865 wps->state = SEND_WSC_NACK; 2866 return WPS_CONTINUE; 2867 } 2868 2869 wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings " 2870 "attribute"); 2871 if (wps_parse_msg(decrypted, &eattr) < 0 || 2872 wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) || 2873 wps_process_e_snonce1(wps, eattr.e_snonce1)) { 2874 wpabuf_clear_free(decrypted); 2875 wps->state = SEND_WSC_NACK; 2876 return WPS_CONTINUE; 2877 } 2878 wpabuf_clear_free(decrypted); 2879 2880 wps->state = SEND_M6; 2881 return WPS_CONTINUE; 2882} 2883 2884 2885static void wps_sta_cred_cb(struct wps_data *wps) 2886{ 2887 /* 2888 * Update credential to only include a single authentication and 2889 * encryption type in case the AP configuration includes more than one 2890 * option. 2891 */ 2892 if (wps->cred.auth_type & WPS_AUTH_WPA2PSK) 2893 wps->cred.auth_type = WPS_AUTH_WPA2PSK; 2894 else if (wps->cred.auth_type & WPS_AUTH_WPAPSK) 2895 wps->cred.auth_type = WPS_AUTH_WPAPSK; 2896 if (wps->cred.encr_type & WPS_ENCR_AES) 2897 wps->cred.encr_type = WPS_ENCR_AES; 2898 else if (wps->cred.encr_type & WPS_ENCR_TKIP) 2899 wps->cred.encr_type = WPS_ENCR_TKIP; 2900 wpa_printf(MSG_DEBUG, "WPS: Update local configuration based on the " 2901 "AP configuration"); 2902 if (wps->wps->cred_cb) 2903 wps->wps->cred_cb(wps->wps->cb_ctx, &wps->cred); 2904} 2905 2906 2907static void wps_cred_update(struct wps_credential *dst, 2908 struct wps_credential *src) 2909{ 2910 os_memcpy(dst->ssid, src->ssid, sizeof(dst->ssid)); 2911 dst->ssid_len = src->ssid_len; 2912 dst->auth_type = src->auth_type; 2913 dst->encr_type = src->encr_type; 2914 dst->key_idx = src->key_idx; 2915 os_memcpy(dst->key, src->key, sizeof(dst->key)); 2916 dst->key_len = src->key_len; 2917} 2918 2919 2920static int wps_process_ap_settings_r(struct wps_data *wps, 2921 struct wps_parse_attr *attr) 2922{ 2923 struct wpabuf *msg; 2924 2925 if (wps->wps->ap || wps->er) 2926 return 0; 2927 2928 /* AP Settings Attributes in M7 when Enrollee is an AP */ 2929 if (wps_process_ap_settings(attr, &wps->cred) < 0) 2930 return -1; 2931 2932 wpa_printf(MSG_INFO, "WPS: Received old AP configuration from AP"); 2933 2934 if (wps->new_ap_settings) { 2935 wpa_printf(MSG_INFO, "WPS: Update AP configuration based on " 2936 "new settings"); 2937 wps_cred_update(&wps->cred, wps->new_ap_settings); 2938 return 0; 2939 } else { 2940 /* 2941 * Use the AP PIN only to receive the current AP settings, not 2942 * to reconfigure the AP. 2943 */ 2944 2945 /* 2946 * Clear selected registrar here since we do not get to 2947 * WSC_Done in this protocol run. 2948 */ 2949 wps_registrar_pin_completed(wps->wps->registrar); 2950 2951 msg = wps_build_ap_cred(wps); 2952 if (msg == NULL) 2953 return -1; 2954 wps->cred.cred_attr = wpabuf_head(msg); 2955 wps->cred.cred_attr_len = wpabuf_len(msg); 2956 2957 if (wps->ap_settings_cb) { 2958 wps->ap_settings_cb(wps->ap_settings_cb_ctx, 2959 &wps->cred); 2960 wpabuf_free(msg); 2961 return 1; 2962 } 2963 wps_sta_cred_cb(wps); 2964 2965 wps->cred.cred_attr = NULL; 2966 wps->cred.cred_attr_len = 0; 2967 wpabuf_free(msg); 2968 2969 return 1; 2970 } 2971} 2972 2973 2974static enum wps_process_res wps_process_m7(struct wps_data *wps, 2975 const struct wpabuf *msg, 2976 struct wps_parse_attr *attr) 2977{ 2978 struct wpabuf *decrypted; 2979 struct wps_parse_attr eattr; 2980 2981 wpa_printf(MSG_DEBUG, "WPS: Received M7"); 2982 2983 if (wps->state != RECV_M7) { 2984 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2985 "receiving M7", wps->state); 2986 wps->state = SEND_WSC_NACK; 2987 return WPS_CONTINUE; 2988 } 2989 2990 if (wps->pbc && wps->wps->registrar->force_pbc_overlap && 2991 !wps_registrar_skip_overlap(wps)) { 2992 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC " 2993 "session overlap"); 2994 wps->state = SEND_WSC_NACK; 2995 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2996 return WPS_CONTINUE; 2997 } 2998 2999 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) || 3000 wps_process_authenticator(wps, attr->authenticator, msg)) { 3001 wps->state = SEND_WSC_NACK; 3002 return WPS_CONTINUE; 3003 } 3004 3005 decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings, 3006 attr->encr_settings_len); 3007 if (decrypted == NULL) { 3008 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypt Encrypted " 3009 "Settings attribute"); 3010 wps->state = SEND_WSC_NACK; 3011 return WPS_CONTINUE; 3012 } 3013 3014 if (wps_validate_m7_encr(decrypted, wps->wps->ap || wps->er, 3015 attr->version2 != NULL) < 0) { 3016 wpabuf_clear_free(decrypted); 3017 wps->state = SEND_WSC_NACK; 3018 return WPS_CONTINUE; 3019 } 3020 3021 wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings " 3022 "attribute"); 3023 if (wps_parse_msg(decrypted, &eattr) < 0 || 3024 wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) || 3025 wps_process_e_snonce2(wps, eattr.e_snonce2) || 3026 wps_process_ap_settings_r(wps, &eattr)) { 3027 wpabuf_clear_free(decrypted); 3028 wps->state = SEND_WSC_NACK; 3029 return WPS_CONTINUE; 3030 } 3031 3032 wpabuf_clear_free(decrypted); 3033 3034 wps->state = SEND_M8; 3035 return WPS_CONTINUE; 3036} 3037 3038 3039static enum wps_process_res wps_process_wsc_msg(struct wps_data *wps, 3040 const struct wpabuf *msg) 3041{ 3042 struct wps_parse_attr attr; 3043 enum wps_process_res ret = WPS_CONTINUE; 3044 3045 wpa_printf(MSG_DEBUG, "WPS: Received WSC_MSG"); 3046 3047 if (wps_parse_msg(msg, &attr) < 0) 3048 return WPS_FAILURE; 3049 3050 if (attr.msg_type == NULL) { 3051 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 3052 wps->state = SEND_WSC_NACK; 3053 return WPS_CONTINUE; 3054 } 3055 3056 if (*attr.msg_type != WPS_M1 && 3057 (attr.registrar_nonce == NULL || 3058 os_memcmp(wps->nonce_r, attr.registrar_nonce, 3059 WPS_NONCE_LEN) != 0)) { 3060 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 3061 return WPS_FAILURE; 3062 } 3063 3064 switch (*attr.msg_type) { 3065 case WPS_M1: 3066 if (wps_validate_m1(msg) < 0) 3067 return WPS_FAILURE; 3068#ifdef CONFIG_WPS_UPNP 3069 if (wps->wps->wps_upnp && attr.mac_addr) { 3070 /* Remove old pending messages when starting new run */ 3071 wps_free_pending_msgs(wps->wps->upnp_msgs); 3072 wps->wps->upnp_msgs = NULL; 3073 3074 upnp_wps_device_send_wlan_event( 3075 wps->wps->wps_upnp, attr.mac_addr, 3076 UPNP_WPS_WLANEVENT_TYPE_EAP, msg); 3077 } 3078#endif /* CONFIG_WPS_UPNP */ 3079 ret = wps_process_m1(wps, &attr); 3080 break; 3081 case WPS_M3: 3082 if (wps_validate_m3(msg) < 0) 3083 return WPS_FAILURE; 3084 ret = wps_process_m3(wps, msg, &attr); 3085 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK) 3086 wps_fail_event(wps->wps, WPS_M3, wps->config_error, 3087 wps->error_indication, wps->mac_addr_e); 3088 break; 3089 case WPS_M5: 3090 if (wps_validate_m5(msg) < 0) 3091 return WPS_FAILURE; 3092 ret = wps_process_m5(wps, msg, &attr); 3093 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK) 3094 wps_fail_event(wps->wps, WPS_M5, wps->config_error, 3095 wps->error_indication, wps->mac_addr_e); 3096 break; 3097 case WPS_M7: 3098 if (wps_validate_m7(msg) < 0) 3099 return WPS_FAILURE; 3100 ret = wps_process_m7(wps, msg, &attr); 3101 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK) 3102 wps_fail_event(wps->wps, WPS_M7, wps->config_error, 3103 wps->error_indication, wps->mac_addr_e); 3104 break; 3105 default: 3106 wpa_printf(MSG_DEBUG, "WPS: Unsupported Message Type %d", 3107 *attr.msg_type); 3108 return WPS_FAILURE; 3109 } 3110 3111 if (ret == WPS_CONTINUE) { 3112 /* Save a copy of the last message for Authenticator derivation 3113 */ 3114 wpabuf_free(wps->last_msg); 3115 wps->last_msg = wpabuf_dup(msg); 3116 } 3117 3118 return ret; 3119} 3120 3121 3122static enum wps_process_res wps_process_wsc_ack(struct wps_data *wps, 3123 const struct wpabuf *msg) 3124{ 3125 struct wps_parse_attr attr; 3126 3127 wpa_printf(MSG_DEBUG, "WPS: Received WSC_ACK"); 3128 3129 if (wps_parse_msg(msg, &attr) < 0) 3130 return WPS_FAILURE; 3131 3132 if (attr.msg_type == NULL) { 3133 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 3134 return WPS_FAILURE; 3135 } 3136 3137 if (*attr.msg_type != WPS_WSC_ACK) { 3138 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d", 3139 *attr.msg_type); 3140 return WPS_FAILURE; 3141 } 3142 3143#ifdef CONFIG_WPS_UPNP 3144 if (wps->wps->wps_upnp && wps->ext_reg && wps->state == RECV_M2D_ACK && 3145 upnp_wps_subscribers(wps->wps->wps_upnp)) { 3146 if (wps->wps->upnp_msgs) 3147 return WPS_CONTINUE; 3148 wpa_printf(MSG_DEBUG, "WPS: Wait for response from an " 3149 "external Registrar"); 3150 return WPS_PENDING; 3151 } 3152#endif /* CONFIG_WPS_UPNP */ 3153 3154 if (attr.registrar_nonce == NULL || 3155 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0) 3156 { 3157 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 3158 return WPS_FAILURE; 3159 } 3160 3161 if (attr.enrollee_nonce == NULL || 3162 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) { 3163 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce"); 3164 return WPS_FAILURE; 3165 } 3166 3167 if (wps->state == RECV_M2D_ACK) { 3168#ifdef CONFIG_WPS_UPNP 3169 if (wps->wps->wps_upnp && 3170 upnp_wps_subscribers(wps->wps->wps_upnp)) { 3171 if (wps->wps->upnp_msgs) 3172 return WPS_CONTINUE; 3173 if (wps->ext_reg == 0) 3174 wps->ext_reg = 1; 3175 wpa_printf(MSG_DEBUG, "WPS: Wait for response from an " 3176 "external Registrar"); 3177 return WPS_PENDING; 3178 } 3179#endif /* CONFIG_WPS_UPNP */ 3180 3181 wpa_printf(MSG_DEBUG, "WPS: No more registrars available - " 3182 "terminate negotiation"); 3183 } 3184 3185 return WPS_FAILURE; 3186} 3187 3188 3189static enum wps_process_res wps_process_wsc_nack(struct wps_data *wps, 3190 const struct wpabuf *msg) 3191{ 3192 struct wps_parse_attr attr; 3193 int old_state; 3194 u16 config_error; 3195 3196 wpa_printf(MSG_DEBUG, "WPS: Received WSC_NACK"); 3197 3198 old_state = wps->state; 3199 wps->state = SEND_WSC_NACK; 3200 3201 if (wps_parse_msg(msg, &attr) < 0) 3202 return WPS_FAILURE; 3203 3204 if (attr.msg_type == NULL) { 3205 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 3206 return WPS_FAILURE; 3207 } 3208 3209 if (*attr.msg_type != WPS_WSC_NACK) { 3210 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d", 3211 *attr.msg_type); 3212 return WPS_FAILURE; 3213 } 3214 3215#ifdef CONFIG_WPS_UPNP 3216 if (wps->wps->wps_upnp && wps->ext_reg) { 3217 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external " 3218 "Registrar terminated by the Enrollee"); 3219 return WPS_FAILURE; 3220 } 3221#endif /* CONFIG_WPS_UPNP */ 3222 3223 if (attr.registrar_nonce == NULL || 3224 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0) 3225 { 3226 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 3227 return WPS_FAILURE; 3228 } 3229 3230 if (attr.enrollee_nonce == NULL || 3231 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) { 3232 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce"); 3233 return WPS_FAILURE; 3234 } 3235 3236 if (attr.config_error == NULL) { 3237 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error attribute " 3238 "in WSC_NACK"); 3239 return WPS_FAILURE; 3240 } 3241 3242 config_error = WPA_GET_BE16(attr.config_error); 3243 wpa_printf(MSG_DEBUG, "WPS: Enrollee terminated negotiation with " 3244 "Configuration Error %d", config_error); 3245 3246 switch (old_state) { 3247 case RECV_M3: 3248 wps_fail_event(wps->wps, WPS_M2, config_error, 3249 wps->error_indication, wps->mac_addr_e); 3250 break; 3251 case RECV_M5: 3252 wps_fail_event(wps->wps, WPS_M4, config_error, 3253 wps->error_indication, wps->mac_addr_e); 3254 break; 3255 case RECV_M7: 3256 wps_fail_event(wps->wps, WPS_M6, config_error, 3257 wps->error_indication, wps->mac_addr_e); 3258 break; 3259 case RECV_DONE: 3260 wps_fail_event(wps->wps, WPS_M8, config_error, 3261 wps->error_indication, wps->mac_addr_e); 3262 break; 3263 default: 3264 break; 3265 } 3266 3267 return WPS_FAILURE; 3268} 3269 3270 3271static enum wps_process_res wps_process_wsc_done(struct wps_data *wps, 3272 const struct wpabuf *msg) 3273{ 3274 struct wps_parse_attr attr; 3275 3276 wpa_printf(MSG_DEBUG, "WPS: Received WSC_Done"); 3277 3278 if (wps->state != RECV_DONE && 3279 (!wps->wps->wps_upnp || !wps->ext_reg)) { 3280 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 3281 "receiving WSC_Done", wps->state); 3282 return WPS_FAILURE; 3283 } 3284 3285 if (wps_parse_msg(msg, &attr) < 0) 3286 return WPS_FAILURE; 3287 3288 if (attr.msg_type == NULL) { 3289 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 3290 return WPS_FAILURE; 3291 } 3292 3293 if (*attr.msg_type != WPS_WSC_DONE) { 3294 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d", 3295 *attr.msg_type); 3296 return WPS_FAILURE; 3297 } 3298 3299#ifdef CONFIG_WPS_UPNP 3300 if (wps->wps->wps_upnp && wps->ext_reg) { 3301 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external " 3302 "Registrar completed successfully"); 3303 wps_device_store(wps->wps->registrar, &wps->peer_dev, 3304 wps->uuid_e); 3305 return WPS_DONE; 3306 } 3307#endif /* CONFIG_WPS_UPNP */ 3308 3309 if (attr.registrar_nonce == NULL || 3310 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0) 3311 { 3312 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 3313 return WPS_FAILURE; 3314 } 3315 3316 if (attr.enrollee_nonce == NULL || 3317 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) { 3318 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce"); 3319 return WPS_FAILURE; 3320 } 3321 3322 wpa_printf(MSG_DEBUG, "WPS: Negotiation completed successfully"); 3323 wps_device_store(wps->wps->registrar, &wps->peer_dev, 3324 wps->uuid_e); 3325 3326 if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->new_psk && 3327 wps->wps->ap && !wps->wps->registrar->disable_auto_conf) { 3328 struct wps_credential cred; 3329 3330 wpa_printf(MSG_DEBUG, "WPS: Moving to Configured state based " 3331 "on first Enrollee connection"); 3332 3333 os_memset(&cred, 0, sizeof(cred)); 3334 os_memcpy(cred.ssid, wps->wps->ssid, wps->wps->ssid_len); 3335 cred.ssid_len = wps->wps->ssid_len; 3336 if (wps->wps->rf_band_cb(wps->wps->cb_ctx) == WPS_RF_60GHZ) { 3337 cred.auth_type = WPS_AUTH_WPA2PSK; 3338 cred.encr_type = WPS_ENCR_AES; 3339 } else { 3340 cred.auth_type = WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK; 3341 cred.encr_type = WPS_ENCR_TKIP | WPS_ENCR_AES; 3342 } 3343 os_memcpy(cred.key, wps->new_psk, wps->new_psk_len); 3344 cred.key_len = wps->new_psk_len; 3345 3346 wps->wps->wps_state = WPS_STATE_CONFIGURED; 3347 wpa_hexdump_ascii_key(MSG_DEBUG, 3348 "WPS: Generated random passphrase", 3349 wps->new_psk, wps->new_psk_len); 3350 if (wps->wps->cred_cb) 3351 wps->wps->cred_cb(wps->wps->cb_ctx, &cred); 3352 3353 os_free(wps->new_psk); 3354 wps->new_psk = NULL; 3355 } 3356 3357 if (!wps->wps->ap && !wps->er) 3358 wps_sta_cred_cb(wps); 3359 3360 if (wps->new_psk) { 3361 if (wps_cb_new_psk(wps->wps->registrar, wps->mac_addr_e, 3362 wps->p2p_dev_addr, wps->new_psk, 3363 wps->new_psk_len)) { 3364 wpa_printf(MSG_DEBUG, "WPS: Failed to configure the " 3365 "new PSK"); 3366 } 3367 os_free(wps->new_psk); 3368 wps->new_psk = NULL; 3369 } 3370 3371 wps_cb_reg_success(wps->wps->registrar, wps->mac_addr_e, wps->uuid_e, 3372 wps->dev_password, wps->dev_password_len); 3373 3374 if (wps->pbc) { 3375 wps_registrar_remove_pbc_session(wps->wps->registrar, 3376 wps->uuid_e, 3377 wps->p2p_dev_addr); 3378 wps_registrar_pbc_completed(wps->wps->registrar); 3379#ifdef WPS_WORKAROUNDS 3380 os_get_reltime(&wps->wps->registrar->pbc_ignore_start); 3381#endif /* WPS_WORKAROUNDS */ 3382 os_memcpy(wps->wps->registrar->pbc_ignore_uuid, wps->uuid_e, 3383 WPS_UUID_LEN); 3384 } else { 3385 wps_registrar_pin_completed(wps->wps->registrar); 3386 } 3387 /* TODO: maintain AuthorizedMACs somewhere separately for each ER and 3388 * merge them into APs own list.. */ 3389 3390 wps_success_event(wps->wps, wps->mac_addr_e); 3391 3392 return WPS_DONE; 3393} 3394 3395 3396enum wps_process_res wps_registrar_process_msg(struct wps_data *wps, 3397 enum wsc_op_code op_code, 3398 const struct wpabuf *msg) 3399{ 3400 enum wps_process_res ret; 3401 3402 wpa_printf(MSG_DEBUG, "WPS: Processing received message (len=%lu " 3403 "op_code=%d)", 3404 (unsigned long) wpabuf_len(msg), op_code); 3405 3406#ifdef CONFIG_WPS_UPNP 3407 if (wps->wps->wps_upnp && op_code == WSC_MSG && wps->ext_reg == 1) { 3408 struct wps_parse_attr attr; 3409 if (wps_parse_msg(msg, &attr) == 0 && attr.msg_type && 3410 *attr.msg_type == WPS_M3) 3411 wps->ext_reg = 2; /* past M2/M2D phase */ 3412 } 3413 if (wps->ext_reg > 1) 3414 wps_registrar_free_pending_m2(wps->wps); 3415 if (wps->wps->wps_upnp && wps->ext_reg && 3416 wps->wps->upnp_msgs == NULL && 3417 (op_code == WSC_MSG || op_code == WSC_Done || op_code == WSC_NACK)) 3418 { 3419 struct wps_parse_attr attr; 3420 int type; 3421 if (wps_parse_msg(msg, &attr) < 0 || attr.msg_type == NULL) 3422 type = -1; 3423 else 3424 type = *attr.msg_type; 3425 wpa_printf(MSG_DEBUG, "WPS: Sending received message (type %d)" 3426 " to external Registrar for processing", type); 3427 upnp_wps_device_send_wlan_event(wps->wps->wps_upnp, 3428 wps->mac_addr_e, 3429 UPNP_WPS_WLANEVENT_TYPE_EAP, 3430 msg); 3431 if (op_code == WSC_MSG) 3432 return WPS_PENDING; 3433 } else if (wps->wps->wps_upnp && wps->ext_reg && op_code == WSC_MSG) { 3434 wpa_printf(MSG_DEBUG, "WPS: Skip internal processing - using " 3435 "external Registrar"); 3436 return WPS_CONTINUE; 3437 } 3438#endif /* CONFIG_WPS_UPNP */ 3439 3440 switch (op_code) { 3441 case WSC_MSG: 3442 return wps_process_wsc_msg(wps, msg); 3443 case WSC_ACK: 3444 if (wps_validate_wsc_ack(msg) < 0) 3445 return WPS_FAILURE; 3446 return wps_process_wsc_ack(wps, msg); 3447 case WSC_NACK: 3448 if (wps_validate_wsc_nack(msg) < 0) 3449 return WPS_FAILURE; 3450 return wps_process_wsc_nack(wps, msg); 3451 case WSC_Done: 3452 if (wps_validate_wsc_done(msg) < 0) 3453 return WPS_FAILURE; 3454 ret = wps_process_wsc_done(wps, msg); 3455 if (ret == WPS_FAILURE) { 3456 wps->state = SEND_WSC_NACK; 3457 wps_fail_event(wps->wps, WPS_WSC_DONE, 3458 wps->config_error, 3459 wps->error_indication, wps->mac_addr_e); 3460 } 3461 return ret; 3462 default: 3463 wpa_printf(MSG_DEBUG, "WPS: Unsupported op_code %d", op_code); 3464 return WPS_FAILURE; 3465 } 3466} 3467 3468 3469int wps_registrar_update_ie(struct wps_registrar *reg) 3470{ 3471 return wps_set_ie(reg); 3472} 3473 3474 3475static void wps_registrar_set_selected_timeout(void *eloop_ctx, 3476 void *timeout_ctx) 3477{ 3478 struct wps_registrar *reg = eloop_ctx; 3479 3480 wpa_printf(MSG_DEBUG, "WPS: Selected Registrar timeout - " 3481 "unselect internal Registrar"); 3482 reg->selected_registrar = 0; 3483 reg->pbc = 0; 3484 wps_registrar_selected_registrar_changed(reg, 0); 3485} 3486 3487 3488#ifdef CONFIG_WPS_UPNP 3489static void wps_registrar_sel_reg_add(struct wps_registrar *reg, 3490 struct subscription *s) 3491{ 3492 int i, j; 3493 wpa_printf(MSG_DEBUG, "WPS: External Registrar selected (dev_pw_id=%d " 3494 "config_methods=0x%x)", 3495 s->dev_password_id, s->config_methods); 3496 reg->sel_reg_union = 1; 3497 if (reg->sel_reg_dev_password_id_override != DEV_PW_PUSHBUTTON) 3498 reg->sel_reg_dev_password_id_override = s->dev_password_id; 3499 if (reg->sel_reg_config_methods_override == -1) 3500 reg->sel_reg_config_methods_override = 0; 3501 reg->sel_reg_config_methods_override |= s->config_methods; 3502 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++) 3503 if (is_zero_ether_addr(reg->authorized_macs_union[i])) 3504 break; 3505 for (j = 0; i < WPS_MAX_AUTHORIZED_MACS && j < WPS_MAX_AUTHORIZED_MACS; 3506 j++) { 3507 if (is_zero_ether_addr(s->authorized_macs[j])) 3508 break; 3509 wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC into union: " 3510 MACSTR, MAC2STR(s->authorized_macs[j])); 3511 os_memcpy(reg->authorized_macs_union[i], 3512 s->authorized_macs[j], ETH_ALEN); 3513 i++; 3514 } 3515 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union", 3516 (u8 *) reg->authorized_macs_union, 3517 sizeof(reg->authorized_macs_union)); 3518} 3519#endif /* CONFIG_WPS_UPNP */ 3520 3521 3522static void wps_registrar_sel_reg_union(struct wps_registrar *reg) 3523{ 3524#ifdef CONFIG_WPS_UPNP 3525 struct subscription *s; 3526 3527 if (reg->wps->wps_upnp == NULL) 3528 return; 3529 3530 dl_list_for_each(s, ®->wps->wps_upnp->subscriptions, 3531 struct subscription, list) { 3532 struct subscr_addr *sa; 3533 sa = dl_list_first(&s->addr_list, struct subscr_addr, list); 3534 if (sa) { 3535 wpa_printf(MSG_DEBUG, "WPS: External Registrar %s:%d", 3536 inet_ntoa(sa->saddr.sin_addr), 3537 ntohs(sa->saddr.sin_port)); 3538 } 3539 if (s->selected_registrar) 3540 wps_registrar_sel_reg_add(reg, s); 3541 else 3542 wpa_printf(MSG_DEBUG, "WPS: External Registrar not " 3543 "selected"); 3544 } 3545#endif /* CONFIG_WPS_UPNP */ 3546} 3547 3548 3549/** 3550 * wps_registrar_selected_registrar_changed - SetSelectedRegistrar change 3551 * @reg: Registrar data from wps_registrar_init() 3552 * 3553 * This function is called when selected registrar state changes, e.g., when an 3554 * AP receives a SetSelectedRegistrar UPnP message. 3555 */ 3556void wps_registrar_selected_registrar_changed(struct wps_registrar *reg, 3557 u16 dev_pw_id) 3558{ 3559 wpa_printf(MSG_DEBUG, "WPS: Selected registrar information changed"); 3560 3561 reg->sel_reg_union = reg->selected_registrar; 3562 reg->sel_reg_dev_password_id_override = -1; 3563 reg->sel_reg_config_methods_override = -1; 3564 os_memcpy(reg->authorized_macs_union, reg->authorized_macs, 3565 WPS_MAX_AUTHORIZED_MACS * ETH_ALEN); 3566 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union (start with own)", 3567 (u8 *) reg->authorized_macs_union, 3568 sizeof(reg->authorized_macs_union)); 3569 if (reg->selected_registrar) { 3570 u16 methods; 3571 3572 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON; 3573 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 3574 WPS_CONFIG_PHY_PUSHBUTTON); 3575 if (reg->pbc) { 3576 reg->sel_reg_dev_password_id_override = 3577 DEV_PW_PUSHBUTTON; 3578 wps_set_pushbutton(&methods, reg->wps->config_methods); 3579 } else if (dev_pw_id) 3580 reg->sel_reg_dev_password_id_override = dev_pw_id; 3581 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar selected " 3582 "(pbc=%d)", reg->pbc); 3583 reg->sel_reg_config_methods_override = methods; 3584 } else 3585 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar not selected"); 3586 3587 wps_registrar_sel_reg_union(reg); 3588 3589 wps_set_ie(reg); 3590 wps_cb_set_sel_reg(reg); 3591} 3592 3593 3594int wps_registrar_get_info(struct wps_registrar *reg, const u8 *addr, 3595 char *buf, size_t buflen) 3596{ 3597 struct wps_registrar_device *d; 3598 int len = 0, ret; 3599 char uuid[40]; 3600 char devtype[WPS_DEV_TYPE_BUFSIZE]; 3601 3602 d = wps_device_get(reg, addr); 3603 if (d == NULL) 3604 return 0; 3605 if (uuid_bin2str(d->uuid, uuid, sizeof(uuid))) 3606 return 0; 3607 3608 ret = os_snprintf(buf + len, buflen - len, 3609 "wpsUuid=%s\n" 3610 "wpsPrimaryDeviceType=%s\n" 3611 "wpsDeviceName=%s\n" 3612 "wpsManufacturer=%s\n" 3613 "wpsModelName=%s\n" 3614 "wpsModelNumber=%s\n" 3615 "wpsSerialNumber=%s\n", 3616 uuid, 3617 wps_dev_type_bin2str(d->dev.pri_dev_type, devtype, 3618 sizeof(devtype)), 3619 d->dev.device_name ? d->dev.device_name : "", 3620 d->dev.manufacturer ? d->dev.manufacturer : "", 3621 d->dev.model_name ? d->dev.model_name : "", 3622 d->dev.model_number ? d->dev.model_number : "", 3623 d->dev.serial_number ? d->dev.serial_number : ""); 3624 if (os_snprintf_error(buflen - len, ret)) 3625 return len; 3626 len += ret; 3627 3628 return len; 3629} 3630 3631 3632int wps_registrar_config_ap(struct wps_registrar *reg, 3633 struct wps_credential *cred) 3634{ 3635 wpa_printf(MSG_DEBUG, "WPS: encr_type=0x%x", cred->encr_type); 3636 if (!(cred->encr_type & (WPS_ENCR_NONE | WPS_ENCR_TKIP | 3637 WPS_ENCR_AES))) { 3638 if (cred->encr_type & WPS_ENCR_WEP) { 3639 wpa_printf(MSG_INFO, "WPS: Reject new AP settings " 3640 "due to WEP configuration"); 3641 return -1; 3642 } 3643 3644 wpa_printf(MSG_INFO, "WPS: Reject new AP settings due to " 3645 "invalid encr_type 0x%x", cred->encr_type); 3646 return -1; 3647 } 3648 3649 if ((cred->encr_type & (WPS_ENCR_TKIP | WPS_ENCR_AES)) == 3650 WPS_ENCR_TKIP) { 3651 wpa_printf(MSG_DEBUG, "WPS: Upgrade encr_type TKIP -> " 3652 "TKIP+AES"); 3653 cred->encr_type |= WPS_ENCR_AES; 3654 } 3655 3656 if ((cred->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) == 3657 WPS_AUTH_WPAPSK) { 3658 wpa_printf(MSG_DEBUG, "WPS: Upgrade auth_type WPAPSK -> " 3659 "WPAPSK+WPA2PSK"); 3660 cred->auth_type |= WPS_AUTH_WPA2PSK; 3661 } 3662 3663 if (reg->wps->cred_cb) 3664 return reg->wps->cred_cb(reg->wps->cb_ctx, cred); 3665 3666 return -1; 3667} 3668 3669 3670#ifdef CONFIG_WPS_NFC 3671 3672int wps_registrar_add_nfc_pw_token(struct wps_registrar *reg, 3673 const u8 *pubkey_hash, u16 pw_id, 3674 const u8 *dev_pw, size_t dev_pw_len, 3675 int pk_hash_provided_oob) 3676{ 3677 struct wps_nfc_pw_token *token; 3678 3679 if (dev_pw_len > WPS_OOB_DEVICE_PASSWORD_LEN) 3680 return -1; 3681 3682 if (pw_id == DEV_PW_NFC_CONNECTION_HANDOVER && 3683 (pubkey_hash == NULL || !pk_hash_provided_oob)) { 3684 wpa_printf(MSG_DEBUG, "WPS: Unexpected NFC Password Token " 3685 "addition - missing public key hash"); 3686 return -1; 3687 } 3688 3689 wps_free_nfc_pw_tokens(®->nfc_pw_tokens, pw_id); 3690 3691 token = os_zalloc(sizeof(*token)); 3692 if (token == NULL) 3693 return -1; 3694 3695 token->peer_pk_hash_known = pubkey_hash != NULL; 3696 if (pubkey_hash) 3697 os_memcpy(token->pubkey_hash, pubkey_hash, 3698 WPS_OOB_PUBKEY_HASH_LEN); 3699 token->pw_id = pw_id; 3700 token->pk_hash_provided_oob = pk_hash_provided_oob; 3701 if (dev_pw) { 3702 wpa_snprintf_hex_uppercase((char *) token->dev_pw, 3703 sizeof(token->dev_pw), 3704 dev_pw, dev_pw_len); 3705 token->dev_pw_len = dev_pw_len * 2; 3706 } 3707 3708 dl_list_add(®->nfc_pw_tokens, &token->list); 3709 3710 reg->selected_registrar = 1; 3711 reg->pbc = 0; 3712 wps_registrar_add_authorized_mac(reg, 3713 (u8 *) "\xff\xff\xff\xff\xff\xff"); 3714 wps_registrar_selected_registrar_changed(reg, pw_id); 3715 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 3716 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, 3717 wps_registrar_set_selected_timeout, 3718 reg, NULL); 3719 3720 wpa_printf(MSG_DEBUG, "WPS: Added NFC Device Password %u to Registrar", 3721 pw_id); 3722 3723 return 0; 3724} 3725 3726 3727int wps_registrar_add_nfc_password_token(struct wps_registrar *reg, 3728 const u8 *oob_dev_pw, 3729 size_t oob_dev_pw_len) 3730{ 3731 const u8 *pos, *hash, *dev_pw; 3732 u16 id; 3733 size_t dev_pw_len; 3734 3735 if (oob_dev_pw_len < WPS_OOB_PUBKEY_HASH_LEN + 2 || 3736 oob_dev_pw_len > WPS_OOB_PUBKEY_HASH_LEN + 2 + 3737 WPS_OOB_DEVICE_PASSWORD_LEN) 3738 return -1; 3739 3740 hash = oob_dev_pw; 3741 pos = oob_dev_pw + WPS_OOB_PUBKEY_HASH_LEN; 3742 id = WPA_GET_BE16(pos); 3743 dev_pw = pos + 2; 3744 dev_pw_len = oob_dev_pw + oob_dev_pw_len - dev_pw; 3745 3746 wpa_printf(MSG_DEBUG, "WPS: Add NFC Password Token for Password ID %u", 3747 id); 3748 3749 wpa_hexdump(MSG_DEBUG, "WPS: Public Key Hash", 3750 hash, WPS_OOB_PUBKEY_HASH_LEN); 3751 wpa_hexdump_key(MSG_DEBUG, "WPS: Device Password", dev_pw, dev_pw_len); 3752 3753 return wps_registrar_add_nfc_pw_token(reg, hash, id, dev_pw, 3754 dev_pw_len, 0); 3755} 3756 3757 3758void wps_registrar_remove_nfc_pw_token(struct wps_registrar *reg, 3759 struct wps_nfc_pw_token *token) 3760{ 3761 wps_registrar_remove_authorized_mac(reg, 3762 (u8 *) "\xff\xff\xff\xff\xff\xff"); 3763 wps_registrar_selected_registrar_changed(reg, 0); 3764 3765 /* 3766 * Free the NFC password token if it was used only for a single protocol 3767 * run. The static handover case uses the same password token multiple 3768 * times, so do not free that case here. 3769 */ 3770 if (token->peer_pk_hash_known) 3771 os_free(token); 3772} 3773 3774#endif /* CONFIG_WPS_NFC */ 3775