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