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