contrib/hostapd/src/wps/wps.c

   1 /*
   2  * Wi-Fi Protected Setup
   3  * Copyright (c) 2007-2009, 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 "includes.h"
  10
  11 #include "common.h"
  12 #include "crypto/dh_group5.h"
  13 #include "common/ieee802_11_defs.h"
  14 #include "wps_i.h"
  15 #include "wps_dev_attr.h"
  16
  17
  18 #ifdef CONFIG_WPS_TESTING
  19 int wps_version_number = 0x20;
  20 int wps_testing_dummy_cred = 0;
  21 int wps_corrupt_pkhash = 0;
  22 #endif /* CONFIG_WPS_TESTING */
  23
  24
  25 /**
  26  * wps_init - Initialize WPS Registration protocol data
  27  * @cfg: WPS configuration
  28  * Returns: Pointer to allocated data or %NULL on failure
  29  *
  30  * This function is used to initialize WPS data for a registration protocol
  31  * instance (i.e., each run of registration protocol as a Registrar of
  32  * Enrollee. The caller is responsible for freeing this data after the
  33  * registration run has been completed by calling wps_deinit().
  34  */
  35 struct wps_data * wps_init(const struct wps_config *cfg)
  36 {
  37         struct wps_data *data = os_zalloc(sizeof(*data));
  38         if (data == NULL)
  39                 return NULL;
  40         data->wps = cfg->wps;
  41         data->registrar = cfg->registrar;
  42         if (cfg->registrar) {
  43                 os_memcpy(data->uuid_r, cfg->wps->uuid, WPS_UUID_LEN);
  44         } else {
  45                 os_memcpy(data->mac_addr_e, cfg->wps->dev.mac_addr, ETH_ALEN);
  46                 os_memcpy(data->uuid_e, cfg->wps->uuid, WPS_UUID_LEN);
  47         }
  48         if (cfg->pin) {
  49                 data->dev_pw_id = cfg->dev_pw_id;
  50                 data->dev_password = os_malloc(cfg->pin_len);
  51                 if (data->dev_password == NULL) {
  52                         os_free(data);
  53                         return NULL;
  54                 }
  55                 os_memcpy(data->dev_password, cfg->pin, cfg->pin_len);
  56                 data->dev_password_len = cfg->pin_len;
  57                 wpa_hexdump_key(MSG_DEBUG, "WPS: AP PIN dev_password",
  58                                 data->dev_password, data->dev_password_len);
  59         }
  60
  61 #ifdef CONFIG_WPS_NFC
  62         if (cfg->pin == NULL &&
  63             cfg->dev_pw_id == DEV_PW_NFC_CONNECTION_HANDOVER)
  64                 data->dev_pw_id = cfg->dev_pw_id;
  65
  66         if (cfg->wps->ap && !cfg->registrar && cfg->wps->ap_nfc_dev_pw_id) {
  67                 /* Keep AP PIN as alternative Device Password */
  68                 data->alt_dev_pw_id = data->dev_pw_id;
  69                 data->alt_dev_password = data->dev_password;
  70                 data->alt_dev_password_len = data->dev_password_len;
  71
  72                 data->dev_pw_id = cfg->wps->ap_nfc_dev_pw_id;
  73                 data->dev_password =
  74                         os_malloc(wpabuf_len(cfg->wps->ap_nfc_dev_pw));
  75                 if (data->dev_password == NULL) {
  76                         os_free(data);
  77                         return NULL;
  78                 }
  79                 os_memcpy(data->dev_password,
  80                           wpabuf_head(cfg->wps->ap_nfc_dev_pw),
  81                           wpabuf_len(cfg->wps->ap_nfc_dev_pw));
  82                 data->dev_password_len = wpabuf_len(cfg->wps->ap_nfc_dev_pw);
  83                 wpa_hexdump_key(MSG_DEBUG, "WPS: NFC dev_password",
  84                             data->dev_password, data->dev_password_len);
  85         }
  86 #endif /* CONFIG_WPS_NFC */
  87
  88         data->pbc = cfg->pbc;
  89         if (cfg->pbc) {
  90                 /* Use special PIN '00000000' for PBC */
  91                 data->dev_pw_id = DEV_PW_PUSHBUTTON;
  92                 os_free(data->dev_password);
  93                 data->dev_password = (u8 *) os_strdup("00000000");
  94                 if (data->dev_password == NULL) {
  95                         os_free(data);
  96                         return NULL;
  97                 }
  98                 data->dev_password_len = 8;
  99         }
 100
 101         data->state = data->registrar ? RECV_M1 : SEND_M1;
 102
 103         if (cfg->assoc_wps_ie) {
 104                 struct wps_parse_attr attr;
 105                 wpa_hexdump_buf(MSG_DEBUG, "WPS: WPS IE from (Re)AssocReq",
 106                                 cfg->assoc_wps_ie);
 107                 if (wps_parse_msg(cfg->assoc_wps_ie, &attr) < 0) {
 108                         wpa_printf(MSG_DEBUG, "WPS: Failed to parse WPS IE "
 109                                    "from (Re)AssocReq");
 110                 } else if (attr.request_type == NULL) {
 111                         wpa_printf(MSG_DEBUG, "WPS: No Request Type attribute "
 112                                    "in (Re)AssocReq WPS IE");
 113                 } else {
 114                         wpa_printf(MSG_DEBUG, "WPS: Request Type (from WPS IE "
 115                                    "in (Re)AssocReq WPS IE): %d",
 116                                    *attr.request_type);
 117                         data->request_type = *attr.request_type;
 118                 }
 119         }
 120
 121         if (cfg->new_ap_settings) {
 122                 data->new_ap_settings =
 123                         os_malloc(sizeof(*data->new_ap_settings));
 124                 if (data->new_ap_settings == NULL) {
 125                         os_free(data->dev_password);
 126                         os_free(data);
 127                         return NULL;
 128                 }
 129                 os_memcpy(data->new_ap_settings, cfg->new_ap_settings,
 130                           sizeof(*data->new_ap_settings));
 131         }
 132
 133         if (cfg->peer_addr)
 134                 os_memcpy(data->peer_dev.mac_addr, cfg->peer_addr, ETH_ALEN);
 135         if (cfg->p2p_dev_addr)
 136                 os_memcpy(data->p2p_dev_addr, cfg->p2p_dev_addr, ETH_ALEN);
 137
 138         data->use_psk_key = cfg->use_psk_key;
 139         data->pbc_in_m1 = cfg->pbc_in_m1;
 140
 141         if (cfg->peer_pubkey_hash) {
 142                 os_memcpy(data->peer_pubkey_hash, cfg->peer_pubkey_hash,
 143                           WPS_OOB_PUBKEY_HASH_LEN);
 144                 data->peer_pubkey_hash_set = 1;
 145         }
 146
 147         return data;
 148 }
 149
 150
 151 /**
 152  * wps_deinit - Deinitialize WPS Registration protocol data
 153  * @data: WPS Registration protocol data from wps_init()
 154  */
 155 void wps_deinit(struct wps_data *data)
 156 {
 157 #ifdef CONFIG_WPS_NFC
 158         if (data->registrar && data->nfc_pw_token)
 159                 wps_registrar_remove_nfc_pw_token(data->wps->registrar,
 160                                                   data->nfc_pw_token);
 161 #endif /* CONFIG_WPS_NFC */
 162
 163         if (data->wps_pin_revealed) {
 164                 wpa_printf(MSG_DEBUG, "WPS: Full PIN information revealed and "
 165                            "negotiation failed");
 166                 if (data->registrar)
 167                         wps_registrar_invalidate_pin(data->wps->registrar,
 168                                                      data->uuid_e);
 169         } else if (data->registrar)
 170                 wps_registrar_unlock_pin(data->wps->registrar, data->uuid_e);
 171
 172         wpabuf_free(data->dh_privkey);
 173         wpabuf_free(data->dh_pubkey_e);
 174         wpabuf_free(data->dh_pubkey_r);
 175         wpabuf_free(data->last_msg);
 176         os_free(data->dev_password);
 177         os_free(data->alt_dev_password);
 178         os_free(data->new_psk);
 179         wps_device_data_free(&data->peer_dev);
 180         os_free(data->new_ap_settings);
 181         dh5_free(data->dh_ctx);
 182         os_free(data);
 183 }
 184
 185
 186 /**
 187  * wps_process_msg - Process a WPS message
 188  * @wps: WPS Registration protocol data from wps_init()
 189  * @op_code: Message OP Code
 190  * @msg: Message data
 191  * Returns: Processing result
 192  *
 193  * This function is used to process WPS messages with OP Codes WSC_ACK,
 194  * WSC_NACK, WSC_MSG, and WSC_Done. The caller (e.g., EAP server/peer) is
 195  * responsible for reassembling the messages before calling this function.
 196  * Response to this message is built by calling wps_get_msg().
 197  */
 198 enum wps_process_res wps_process_msg(struct wps_data *wps,
 199                                      enum wsc_op_code op_code,
 200                                      const struct wpabuf *msg)
 201 {
 202         if (wps->registrar)
 203                 return wps_registrar_process_msg(wps, op_code, msg);
 204         else
 205                 return wps_enrollee_process_msg(wps, op_code, msg);
 206 }
 207
 208
 209 /**
 210  * wps_get_msg - Build a WPS message
 211  * @wps: WPS Registration protocol data from wps_init()
 212  * @op_code: Buffer for returning message OP Code
 213  * Returns: The generated WPS message or %NULL on failure
 214  *
 215  * This function is used to build a response to a message processed by calling
 216  * wps_process_msg(). The caller is responsible for freeing the buffer.
 217  */
 218 struct wpabuf * wps_get_msg(struct wps_data *wps, enum wsc_op_code *op_code)
 219 {
 220         if (wps->registrar)
 221                 return wps_registrar_get_msg(wps, op_code);
 222         else
 223                 return wps_enrollee_get_msg(wps, op_code);
 224 }
 225
 226
 227 /**
 228  * wps_is_selected_pbc_registrar - Check whether WPS IE indicates active PBC
 229  * @msg: WPS IE contents from Beacon or Probe Response frame
 230  * Returns: 1 if PBC Registrar is active, 0 if not
 231  */
 232 int wps_is_selected_pbc_registrar(const struct wpabuf *msg)
 233 {
 234         struct wps_parse_attr attr;
 235
 236         /*
 237          * In theory, this could also verify that attr.sel_reg_config_methods
 238          * includes WPS_CONFIG_PUSHBUTTON, but some deployed AP implementations
 239          * do not set Selected Registrar Config Methods attribute properly, so
 240          * it is safer to just use Device Password ID here.
 241          */
 242
 243         if (wps_parse_msg(msg, &attr) < 0 ||
 244             !attr.selected_registrar || *attr.selected_registrar == 0 ||
 245             !attr.dev_password_id ||
 246             WPA_GET_BE16(attr.dev_password_id) != DEV_PW_PUSHBUTTON)
 247                 return 0;
 248
 249 #ifdef CONFIG_WPS_STRICT
 250         if (!attr.sel_reg_config_methods ||
 251             !(WPA_GET_BE16(attr.sel_reg_config_methods) &
 252               WPS_CONFIG_PUSHBUTTON))
 253                 return 0;
 254 #endif /* CONFIG_WPS_STRICT */
 255
 256         return 1;
 257 }
 258
 259
 260 static int is_selected_pin_registrar(struct wps_parse_attr *attr)
 261 {
 262         /*
 263          * In theory, this could also verify that attr.sel_reg_config_methods
 264          * includes WPS_CONFIG_LABEL, WPS_CONFIG_DISPLAY, or WPS_CONFIG_KEYPAD,
 265          * but some deployed AP implementations do not set Selected Registrar
 266          * Config Methods attribute properly, so it is safer to just use
 267          * Device Password ID here.
 268          */
 269
 270         if (!attr->selected_registrar || *attr->selected_registrar == 0)
 271                 return 0;
 272
 273         if (attr->dev_password_id != NULL &&
 274             WPA_GET_BE16(attr->dev_password_id) == DEV_PW_PUSHBUTTON)
 275                 return 0;
 276
 277 #ifdef CONFIG_WPS_STRICT
 278         if (!attr->sel_reg_config_methods ||
 279             !(WPA_GET_BE16(attr->sel_reg_config_methods) &
 280               (WPS_CONFIG_LABEL | WPS_CONFIG_DISPLAY | WPS_CONFIG_KEYPAD)))
 281                 return 0;
 282 #endif /* CONFIG_WPS_STRICT */
 283
 284         return 1;
 285 }
 286
 287
 288 /**
 289  * wps_is_selected_pin_registrar - Check whether WPS IE indicates active PIN
 290  * @msg: WPS IE contents from Beacon or Probe Response frame
 291  * Returns: 1 if PIN Registrar is active, 0 if not
 292  */
 293 int wps_is_selected_pin_registrar(const struct wpabuf *msg)
 294 {
 295         struct wps_parse_attr attr;
 296
 297         if (wps_parse_msg(msg, &attr) < 0)
 298                 return 0;
 299
 300         return is_selected_pin_registrar(&attr);
 301 }
 302
 303
 304 /**
 305  * wps_is_addr_authorized - Check whether WPS IE authorizes MAC address
 306  * @msg: WPS IE contents from Beacon or Probe Response frame
 307  * @addr: MAC address to search for
 308  * @ver1_compat: Whether to use version 1 compatibility mode
 309  * Returns: 2 if the specified address is explicit authorized, 1 if address is
 310  * authorized (broadcast), 0 if not
 311  */
 312 int wps_is_addr_authorized(const struct wpabuf *msg, const u8 *addr,
 313                            int ver1_compat)
 314 {
 315         struct wps_parse_attr attr;
 316         unsigned int i;
 317         const u8 *pos;
 318         const u8 bcast[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 319
 320         if (wps_parse_msg(msg, &attr) < 0)
 321                 return 0;
 322
 323         if (!attr.version2 && ver1_compat) {
 324                 /*
 325                  * Version 1.0 AP - AuthorizedMACs not used, so revert back to
 326                  * old mechanism of using SelectedRegistrar.
 327                  */
 328                 return is_selected_pin_registrar(&attr);
 329         }
 330
 331         if (!attr.authorized_macs)
 332                 return 0;
 333
 334         pos = attr.authorized_macs;
 335         for (i = 0; i < attr.authorized_macs_len / ETH_ALEN; i++) {
 336                 if (os_memcmp(pos, addr, ETH_ALEN) == 0)
 337                         return 2;
 338                 if (os_memcmp(pos, bcast, ETH_ALEN) == 0)
 339                         return 1;
 340                 pos += ETH_ALEN;
 341         }
 342
 343         return 0;
 344 }
 345
 346
 347 /**
 348  * wps_ap_priority_compar - Prioritize WPS IE from two APs
 349  * @wps_a: WPS IE contents from Beacon or Probe Response frame
 350  * @wps_b: WPS IE contents from Beacon or Probe Response frame
 351  * Returns: 1 if wps_b is considered more likely selection for WPS
 352  * provisioning, -1 if wps_a is considered more like, or 0 if no preference
 353  */
 354 int wps_ap_priority_compar(const struct wpabuf *wps_a,
 355                            const struct wpabuf *wps_b)
 356 {
 357         struct wps_parse_attr attr_a, attr_b;
 358         int sel_a, sel_b;
 359
 360         if (wps_a == NULL || wps_parse_msg(wps_a, &attr_a) < 0)
 361                 return 1;
 362         if (wps_b == NULL || wps_parse_msg(wps_b, &attr_b) < 0)
 363                 return -1;
 364
 365         sel_a = attr_a.selected_registrar && *attr_a.selected_registrar != 0;
 366         sel_b = attr_b.selected_registrar && *attr_b.selected_registrar != 0;
 367
 368         if (sel_a && !sel_b)
 369                 return -1;
 370         if (!sel_a && sel_b)
 371                 return 1;
 372
 373         return 0;
 374 }
 375
 376
 377 /**
 378  * wps_get_uuid_e - Get UUID-E from WPS IE
 379  * @msg: WPS IE contents from Beacon or Probe Response frame
 380  * Returns: Pointer to UUID-E or %NULL if not included
 381  *
 382  * The returned pointer is to the msg contents and it remains valid only as
 383  * long as the msg buffer is valid.
 384  */
 385 const u8 * wps_get_uuid_e(const struct wpabuf *msg)
 386 {
 387         struct wps_parse_attr attr;
 388
 389         if (wps_parse_msg(msg, &attr) < 0)
 390                 return NULL;
 391         return attr.uuid_e;
 392 }
 393
 394
 395 /**
 396  * wps_is_20 - Check whether WPS attributes claim support for WPS 2.0
 397  */
 398 int wps_is_20(const struct wpabuf *msg)
 399 {
 400         struct wps_parse_attr attr;
 401
 402         if (msg == NULL || wps_parse_msg(msg, &attr) < 0)
 403                 return 0;
 404         return attr.version2 != NULL;
 405 }
 406
 407
 408 /**
 409  * wps_build_assoc_req_ie - Build WPS IE for (Re)Association Request
 410  * @req_type: Value for Request Type attribute
 411  * Returns: WPS IE or %NULL on failure
 412  *
 413  * The caller is responsible for freeing the buffer.
 414  */
 415 struct wpabuf * wps_build_assoc_req_ie(enum wps_request_type req_type)
 416 {
 417         struct wpabuf *ie;
 418         u8 *len;
 419
 420         wpa_printf(MSG_DEBUG, "WPS: Building WPS IE for (Re)Association "
 421                    "Request");
 422         ie = wpabuf_alloc(100);
 423         if (ie == NULL)
 424                 return NULL;
 425
 426         wpabuf_put_u8(ie, WLAN_EID_VENDOR_SPECIFIC);
 427         len = wpabuf_put(ie, 1);
 428         wpabuf_put_be32(ie, WPS_DEV_OUI_WFA);
 429
 430         if (wps_build_version(ie) ||
 431             wps_build_req_type(ie, req_type) ||
 432             wps_build_wfa_ext(ie, 0, NULL, 0)) {
 433                 wpabuf_free(ie);
 434                 return NULL;
 435         }
 436
 437         *len = wpabuf_len(ie) - 2;
 438
 439         return ie;
 440 }
 441
 442
 443 /**
 444  * wps_build_assoc_resp_ie - Build WPS IE for (Re)Association Response
 445  * Returns: WPS IE or %NULL on failure
 446  *
 447  * The caller is responsible for freeing the buffer.
 448  */
 449 struct wpabuf * wps_build_assoc_resp_ie(void)
 450 {
 451         struct wpabuf *ie;
 452         u8 *len;
 453
 454         wpa_printf(MSG_DEBUG, "WPS: Building WPS IE for (Re)Association "
 455                    "Response");
 456         ie = wpabuf_alloc(100);
 457         if (ie == NULL)
 458                 return NULL;
 459
 460         wpabuf_put_u8(ie, WLAN_EID_VENDOR_SPECIFIC);
 461         len = wpabuf_put(ie, 1);
 462         wpabuf_put_be32(ie, WPS_DEV_OUI_WFA);
 463
 464         if (wps_build_version(ie) ||
 465             wps_build_resp_type(ie, WPS_RESP_AP) ||
 466             wps_build_wfa_ext(ie, 0, NULL, 0)) {
 467                 wpabuf_free(ie);
 468                 return NULL;
 469         }
 470
 471         *len = wpabuf_len(ie) - 2;
 472
 473         return ie;
 474 }
 475
 476
 477 /**
 478  * wps_build_probe_req_ie - Build WPS IE for Probe Request
 479  * @pw_id: Password ID (DEV_PW_PUSHBUTTON for active PBC and DEV_PW_DEFAULT for
 480  * most other use cases)
 481  * @dev: Device attributes
 482  * @uuid: Own UUID
 483  * @req_type: Value for Request Type attribute
 484  * @num_req_dev_types: Number of requested device types
 485  * @req_dev_types: Requested device types (8 * num_req_dev_types octets) or
 486  *      %NULL if none
 487  * Returns: WPS IE or %NULL on failure
 488  *
 489  * The caller is responsible for freeing the buffer.
 490  */
 491 struct wpabuf * wps_build_probe_req_ie(u16 pw_id, struct wps_device_data *dev,
 492                                        const u8 *uuid,
 493                                        enum wps_request_type req_type,
 494                                        unsigned int num_req_dev_types,
 495                                        const u8 *req_dev_types)
 496 {
 497         struct wpabuf *ie;
 498
 499         wpa_printf(MSG_DEBUG, "WPS: Building WPS IE for Probe Request");
 500
 501         ie = wpabuf_alloc(500);
 502         if (ie == NULL)
 503                 return NULL;
 504
 505         if (wps_build_version(ie) ||
 506             wps_build_req_type(ie, req_type) ||
 507             wps_build_config_methods(ie, dev->config_methods) ||
 508             wps_build_uuid_e(ie, uuid) ||
 509             wps_build_primary_dev_type(dev, ie) ||
 510             wps_build_rf_bands(dev, ie, 0) ||
 511             wps_build_assoc_state(NULL, ie) ||
 512             wps_build_config_error(ie, WPS_CFG_NO_ERROR) ||
 513             wps_build_dev_password_id(ie, pw_id) ||
 514 #ifdef CONFIG_WPS2
 515             wps_build_manufacturer(dev, ie) ||
 516             wps_build_model_name(dev, ie) ||
 517             wps_build_model_number(dev, ie) ||
 518             wps_build_dev_name(dev, ie) ||
 519             wps_build_wfa_ext(ie, req_type == WPS_REQ_ENROLLEE, NULL, 0) ||
 520 #endif /* CONFIG_WPS2 */
 521             wps_build_req_dev_type(dev, ie, num_req_dev_types, req_dev_types)
 522             ||
 523             wps_build_secondary_dev_type(dev, ie)
 524                 ) {
 525                 wpabuf_free(ie);
 526                 return NULL;
 527         }
 528
 529 #ifndef CONFIG_WPS2
 530         if (dev->p2p && wps_build_dev_name(dev, ie)) {
 531                 wpabuf_free(ie);
 532                 return NULL;
 533         }
 534 #endif /* CONFIG_WPS2 */
 535
 536         return wps_ie_encapsulate(ie);
 537 }
 538
 539
 540 void wps_free_pending_msgs(struct upnp_pending_message *msgs)
 541 {
 542         struct upnp_pending_message *p, *prev;
 543         p = msgs;
 544         while (p) {
 545                 prev = p;
 546                 p = p->next;
 547                 wpabuf_free(prev->msg);
 548                 os_free(prev);
 549         }
 550 }
 551
 552
 553 int wps_attr_text(struct wpabuf *data, char *buf, char *end)
 554 {
 555         struct wps_parse_attr attr;
 556         char *pos = buf;
 557         int ret;
 558
 559         if (wps_parse_msg(data, &attr) < 0)
 560                 return -1;
 561
 562         if (attr.wps_state) {
 563                 if (*attr.wps_state == WPS_STATE_NOT_CONFIGURED)
 564                         ret = os_snprintf(pos, end - pos,
 565                                           "wps_state=unconfigured\n");
 566                 else if (*attr.wps_state == WPS_STATE_CONFIGURED)
 567                         ret = os_snprintf(pos, end - pos,
 568                                           "wps_state=configured\n");
 569                 else
 570                         ret = 0;
 571                 if (ret < 0 || ret >= end - pos)
 572                         return pos - buf;
 573                 pos += ret;
 574         }
 575
 576         if (attr.ap_setup_locked && *attr.ap_setup_locked) {
 577                 ret = os_snprintf(pos, end - pos,
 578                                   "wps_ap_setup_locked=1\n");
 579                 if (ret < 0 || ret >= end - pos)
 580                         return pos - buf;
 581                 pos += ret;
 582         }
 583
 584         if (attr.selected_registrar && *attr.selected_registrar) {
 585                 ret = os_snprintf(pos, end - pos,
 586                                   "wps_selected_registrar=1\n");
 587                 if (ret < 0 || ret >= end - pos)
 588                         return pos - buf;
 589                 pos += ret;
 590         }
 591
 592         if (attr.dev_password_id) {
 593                 ret = os_snprintf(pos, end - pos,
 594                                   "wps_device_password_id=%u\n",
 595                                   WPA_GET_BE16(attr.dev_password_id));
 596                 if (ret < 0 || ret >= end - pos)
 597                         return pos - buf;
 598                 pos += ret;
 599         }
 600
 601         if (attr.sel_reg_config_methods) {
 602                 ret = os_snprintf(pos, end - pos,
 603                                   "wps_selected_registrar_config_methods="
 604                                   "0x%04x\n",
 605                                   WPA_GET_BE16(attr.sel_reg_config_methods));
 606                 if (ret < 0 || ret >= end - pos)
 607                         return pos - buf;
 608                 pos += ret;
 609         }
 610
 611         if (attr.primary_dev_type) {
 612                 char devtype[WPS_DEV_TYPE_BUFSIZE];
 613                 ret = os_snprintf(pos, end - pos,
 614                                   "wps_primary_device_type=%s\n",
 615                                   wps_dev_type_bin2str(attr.primary_dev_type,
 616                                                        devtype,
 617                                                        sizeof(devtype)));
 618                 if (ret < 0 || ret >= end - pos)
 619                         return pos - buf;
 620                 pos += ret;
 621         }
 622
 623         if (attr.dev_name) {
 624                 char *str = os_malloc(attr.dev_name_len + 1);
 625                 size_t i;
 626                 if (str == NULL)
 627                         return pos - buf;
 628                 for (i = 0; i < attr.dev_name_len; i++) {
 629                         if (attr.dev_name[i] < 32)
 630                                 str[i] = '_';
 631                         else
 632                                 str[i] = attr.dev_name[i];
 633                 }
 634                 str[i] = '\0';
 635                 ret = os_snprintf(pos, end - pos, "wps_device_name=%s\n", str);
 636                 os_free(str);
 637                 if (ret < 0 || ret >= end - pos)
 638                         return pos - buf;
 639                 pos += ret;
 640         }
 641
 642         if (attr.config_methods) {
 643                 ret = os_snprintf(pos, end - pos,
 644                                   "wps_config_methods=0x%04x\n",
 645                                   WPA_GET_BE16(attr.config_methods));
 646                 if (ret < 0 || ret >= end - pos)
 647                         return pos - buf;
 648                 pos += ret;
 649         }
 650
 651         return pos - buf;
 652 }
 653
 654
 655 const char * wps_ei_str(enum wps_error_indication ei)
 656 {
 657         switch (ei) {
 658         case WPS_EI_NO_ERROR:
 659                 return "No Error";
 660         case WPS_EI_SECURITY_TKIP_ONLY_PROHIBITED:
 661                 return "TKIP Only Prohibited";
 662         case WPS_EI_SECURITY_WEP_PROHIBITED:
 663                 return "WEP Prohibited";
 664         case WPS_EI_AUTH_FAILURE:
 665                 return "Authentication Failure";
 666         default:
 667                 return "Unknown";
 668         }
 669 }