src/wps/wps_common.c

   1 /*
   2  * Wi-Fi Protected Setup - common functionality
   3  * Copyright (c) 2008-2009, Jouni Malinen <j@w1.fi>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  */
  14
  15 #include "includes.h"
  16
  17 #include "common.h"
  18 #include "crypto/aes_wrap.h"
  19 #include "crypto/crypto.h"
  20 #include "crypto/dh_group5.h"
  21 #include "crypto/sha1.h"
  22 #include "crypto/sha256.h"
  23 #include "wps_i.h"
  24 #include "wps_dev_attr.h"
  25
  26
  27 void wps_kdf(const u8 *key, const u8 *label_prefix, size_t label_prefix_len,
  28              const char *label, u8 *res, size_t res_len)
  29 {
  30         u8 i_buf[4], key_bits[4];
  31         const u8 *addr[4];
  32         size_t len[4];
  33         int i, iter;
  34         u8 hash[SHA256_MAC_LEN], *opos;
  35         size_t left;
  36
  37         WPA_PUT_BE32(key_bits, res_len * 8);
  38
  39         addr[0] = i_buf;
  40         len[0] = sizeof(i_buf);
  41         addr[1] = label_prefix;
  42         len[1] = label_prefix_len;
  43         addr[2] = (const u8 *) label;
  44         len[2] = os_strlen(label);
  45         addr[3] = key_bits;
  46         len[3] = sizeof(key_bits);
  47
  48         iter = (res_len + SHA256_MAC_LEN - 1) / SHA256_MAC_LEN;
  49         opos = res;
  50         left = res_len;
  51
  52         for (i = 1; i <= iter; i++) {
  53                 WPA_PUT_BE32(i_buf, i);
  54                 hmac_sha256_vector(key, SHA256_MAC_LEN, 4, addr, len, hash);
  55                 if (i < iter) {
  56                         os_memcpy(opos, hash, SHA256_MAC_LEN);
  57                         opos += SHA256_MAC_LEN;
  58                         left -= SHA256_MAC_LEN;
  59                 } else
  60                         os_memcpy(opos, hash, left);
  61         }
  62 }
  63
  64
  65 int wps_derive_keys(struct wps_data *wps)
  66 {
  67         struct wpabuf *pubkey, *dh_shared;
  68         u8 dhkey[SHA256_MAC_LEN], kdk[SHA256_MAC_LEN];
  69         const u8 *addr[3];
  70         size_t len[3];
  71         u8 keys[WPS_AUTHKEY_LEN + WPS_KEYWRAPKEY_LEN + WPS_EMSK_LEN];
  72
  73         if (wps->dh_privkey == NULL) {
  74                 wpa_printf(MSG_DEBUG, "WPS: Own DH private key not available");
  75                 return -1;
  76         }
  77
  78         pubkey = wps->registrar ? wps->dh_pubkey_e : wps->dh_pubkey_r;
  79         if (pubkey == NULL) {
  80                 wpa_printf(MSG_DEBUG, "WPS: Peer DH public key not available");
  81                 return -1;
  82         }
  83
  84         wpa_hexdump_buf_key(MSG_DEBUG, "WPS: DH Private Key", wps->dh_privkey);
  85         wpa_hexdump_buf(MSG_DEBUG, "WPS: DH peer Public Key", pubkey);
  86         dh_shared = dh5_derive_shared(wps->dh_ctx, pubkey, wps->dh_privkey);
  87         dh5_free(wps->dh_ctx);
  88         wps->dh_ctx = NULL;
  89         dh_shared = wpabuf_zeropad(dh_shared, 192);
  90         if (dh_shared == NULL) {
  91                 wpa_printf(MSG_DEBUG, "WPS: Failed to derive DH shared key");
  92                 return -1;
  93         }
  94
  95         /* Own DH private key is not needed anymore */
  96         wpabuf_free(wps->dh_privkey);
  97         wps->dh_privkey = NULL;
  98
  99         wpa_hexdump_buf_key(MSG_DEBUG, "WPS: DH shared key", dh_shared);
 100
 101         /* DHKey = SHA-256(g^AB mod p) */
 102         addr[0] = wpabuf_head(dh_shared);
 103         len[0] = wpabuf_len(dh_shared);
 104         sha256_vector(1, addr, len, dhkey);
 105         wpa_hexdump_key(MSG_DEBUG, "WPS: DHKey", dhkey, sizeof(dhkey));
 106         wpabuf_free(dh_shared);
 107
 108         /* KDK = HMAC-SHA-256_DHKey(N1 || EnrolleeMAC || N2) */
 109         addr[0] = wps->nonce_e;
 110         len[0] = WPS_NONCE_LEN;
 111         addr[1] = wps->mac_addr_e;
 112         len[1] = ETH_ALEN;
 113         addr[2] = wps->nonce_r;
 114         len[2] = WPS_NONCE_LEN;
 115         hmac_sha256_vector(dhkey, sizeof(dhkey), 3, addr, len, kdk);
 116         wpa_hexdump_key(MSG_DEBUG, "WPS: KDK", kdk, sizeof(kdk));
 117
 118         wps_kdf(kdk, NULL, 0, "Wi-Fi Easy and Secure Key Derivation",
 119                 keys, sizeof(keys));
 120         os_memcpy(wps->authkey, keys, WPS_AUTHKEY_LEN);
 121         os_memcpy(wps->keywrapkey, keys + WPS_AUTHKEY_LEN, WPS_KEYWRAPKEY_LEN);
 122         os_memcpy(wps->emsk, keys + WPS_AUTHKEY_LEN + WPS_KEYWRAPKEY_LEN,
 123                   WPS_EMSK_LEN);
 124
 125         wpa_hexdump_key(MSG_DEBUG, "WPS: AuthKey",
 126                         wps->authkey, WPS_AUTHKEY_LEN);
 127         wpa_hexdump_key(MSG_DEBUG, "WPS: KeyWrapKey",
 128                         wps->keywrapkey, WPS_KEYWRAPKEY_LEN);
 129         wpa_hexdump_key(MSG_DEBUG, "WPS: EMSK", wps->emsk, WPS_EMSK_LEN);
 130
 131         return 0;
 132 }
 133
 134
 135 void wps_derive_psk(struct wps_data *wps, const u8 *dev_passwd,
 136                     size_t dev_passwd_len)
 137 {
 138         u8 hash[SHA256_MAC_LEN];
 139
 140         hmac_sha256(wps->authkey, WPS_AUTHKEY_LEN, dev_passwd,
 141                     (dev_passwd_len + 1) / 2, hash);
 142         os_memcpy(wps->psk1, hash, WPS_PSK_LEN);
 143         hmac_sha256(wps->authkey, WPS_AUTHKEY_LEN,
 144                     dev_passwd + (dev_passwd_len + 1) / 2,
 145                     dev_passwd_len / 2, hash);
 146         os_memcpy(wps->psk2, hash, WPS_PSK_LEN);
 147
 148         wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: Device Password",
 149                               dev_passwd, dev_passwd_len);
 150         wpa_hexdump_key(MSG_DEBUG, "WPS: PSK1", wps->psk1, WPS_PSK_LEN);
 151         wpa_hexdump_key(MSG_DEBUG, "WPS: PSK2", wps->psk2, WPS_PSK_LEN);
 152 }
 153
 154
 155 struct wpabuf * wps_decrypt_encr_settings(struct wps_data *wps, const u8 *encr,
 156                                           size_t encr_len)
 157 {
 158         struct wpabuf *decrypted;
 159         const size_t block_size = 16;
 160         size_t i;
 161         u8 pad;
 162         const u8 *pos;
 163
 164         /* AES-128-CBC */
 165         if (encr == NULL || encr_len < 2 * block_size || encr_len % block_size)
 166         {
 167                 wpa_printf(MSG_DEBUG, "WPS: No Encrypted Settings received");
 168                 return NULL;
 169         }
 170
 171         decrypted = wpabuf_alloc(encr_len - block_size);
 172         if (decrypted == NULL)
 173                 return NULL;
 174
 175         wpa_hexdump(MSG_MSGDUMP, "WPS: Encrypted Settings", encr, encr_len);
 176         wpabuf_put_data(decrypted, encr + block_size, encr_len - block_size);
 177         if (aes_128_cbc_decrypt(wps->keywrapkey, encr, wpabuf_mhead(decrypted),
 178                                 wpabuf_len(decrypted))) {
 179                 wpabuf_free(decrypted);
 180                 return NULL;
 181         }
 182
 183         wpa_hexdump_buf_key(MSG_MSGDUMP, "WPS: Decrypted Encrypted Settings",
 184                             decrypted);
 185
 186         pos = wpabuf_head_u8(decrypted) + wpabuf_len(decrypted) - 1;
 187         pad = *pos;
 188         if (pad > wpabuf_len(decrypted)) {
 189                 wpa_printf(MSG_DEBUG, "WPS: Invalid PKCS#5 v2.0 pad value");
 190                 wpabuf_free(decrypted);
 191                 return NULL;
 192         }
 193         for (i = 0; i < pad; i++) {
 194                 if (*pos-- != pad) {
 195                         wpa_printf(MSG_DEBUG, "WPS: Invalid PKCS#5 v2.0 pad "
 196                                    "string");
 197                         wpabuf_free(decrypted);
 198                         return NULL;
 199                 }
 200         }
 201         decrypted->used -= pad;
 202
 203         return decrypted;
 204 }
 205
 206
 207 /**
 208  * wps_pin_checksum - Compute PIN checksum
 209  * @pin: Seven digit PIN (i.e., eight digit PIN without the checksum digit)
 210  * Returns: Checksum digit
 211  */
 212 unsigned int wps_pin_checksum(unsigned int pin)
 213 {
 214         unsigned int accum = 0;
 215         while (pin) {
 216                 accum += 3 * (pin % 10);
 217                 pin /= 10;
 218                 accum += pin % 10;
 219                 pin /= 10;
 220         }
 221
 222         return (10 - accum % 10) % 10;
 223 }
 224
 225
 226 /**
 227  * wps_pin_valid - Check whether a PIN has a valid checksum
 228  * @pin: Eight digit PIN (i.e., including the checksum digit)
 229  * Returns: 1 if checksum digit is valid, or 0 if not
 230  */
 231 unsigned int wps_pin_valid(unsigned int pin)
 232 {
 233         return wps_pin_checksum(pin / 10) == (pin % 10);
 234 }
 235
 236
 237 /**
 238  * wps_generate_pin - Generate a random PIN
 239  * Returns: Eight digit PIN (i.e., including the checksum digit)
 240  */
 241 unsigned int wps_generate_pin(void)
 242 {
 243         unsigned int val;
 244
 245         /* Generate seven random digits for the PIN */
 246         if (os_get_random((unsigned char *) &val, sizeof(val)) < 0) {
 247                 struct os_time now;
 248                 os_get_time(&now);
 249                 val = os_random() ^ now.sec ^ now.usec;
 250         }
 251         val %= 10000000;
 252
 253         /* Append checksum digit */
 254         return val * 10 + wps_pin_checksum(val);
 255 }
 256
 257
 258 void wps_fail_event(struct wps_context *wps, enum wps_msg_type msg)
 259 {
 260         union wps_event_data data;
 261
 262         if (wps->event_cb == NULL)
 263                 return;
 264
 265         os_memset(&data, 0, sizeof(data));
 266         data.fail.msg = msg;
 267         wps->event_cb(wps->cb_ctx, WPS_EV_FAIL, &data);
 268 }
 269
 270
 271 void wps_success_event(struct wps_context *wps)
 272 {
 273         if (wps->event_cb == NULL)
 274                 return;
 275
 276         wps->event_cb(wps->cb_ctx, WPS_EV_SUCCESS, NULL);
 277 }
 278
 279
 280 void wps_pwd_auth_fail_event(struct wps_context *wps, int enrollee, int part)
 281 {
 282         union wps_event_data data;
 283
 284         if (wps->event_cb == NULL)
 285                 return;
 286
 287         os_memset(&data, 0, sizeof(data));
 288         data.pwd_auth_fail.enrollee = enrollee;
 289         data.pwd_auth_fail.part = part;
 290         wps->event_cb(wps->cb_ctx, WPS_EV_PWD_AUTH_FAIL, &data);
 291 }
 292
 293
 294 void wps_pbc_overlap_event(struct wps_context *wps)
 295 {
 296         if (wps->event_cb == NULL)
 297                 return;
 298
 299         wps->event_cb(wps->cb_ctx, WPS_EV_PBC_OVERLAP, NULL);
 300 }
 301
 302
 303 void wps_pbc_timeout_event(struct wps_context *wps)
 304 {
 305         if (wps->event_cb == NULL)
 306                 return;
 307
 308         wps->event_cb(wps->cb_ctx, WPS_EV_PBC_TIMEOUT, NULL);
 309 }
 310
 311
 312 #ifdef CONFIG_WPS_OOB
 313
 314 static struct wpabuf * wps_get_oob_cred(struct wps_context *wps)
 315 {
 316         struct wps_data data;
 317         struct wpabuf *plain;
 318
 319         plain = wpabuf_alloc(500);
 320         if (plain == NULL) {
 321                 wpa_printf(MSG_ERROR, "WPS: Failed to allocate memory for OOB "
 322                            "credential");
 323                 return NULL;
 324         }
 325
 326         os_memset(&data, 0, sizeof(data));
 327         data.wps = wps;
 328         data.auth_type = wps->auth_types;
 329         data.encr_type = wps->encr_types;
 330         if (wps_build_version(plain) ||
 331             wps_build_cred(&data, plain) ||
 332             wps_build_wfa_ext(plain, 0, NULL, 0)) {
 333                 wpabuf_free(plain);
 334                 return NULL;
 335         }
 336
 337         return plain;
 338 }
 339
 340
 341 static struct wpabuf * wps_get_oob_dev_pwd(struct wps_context *wps)
 342 {
 343         struct wpabuf *data;
 344
 345         data = wpabuf_alloc(9 + WPS_OOB_DEVICE_PASSWORD_ATTR_LEN);
 346         if (data == NULL) {
 347                 wpa_printf(MSG_ERROR, "WPS: Failed to allocate memory for OOB "
 348                            "device password attribute");
 349                 return NULL;
 350         }
 351
 352         wpabuf_free(wps->oob_conf.dev_password);
 353         wps->oob_conf.dev_password =
 354                 wpabuf_alloc(WPS_OOB_DEVICE_PASSWORD_LEN * 2 + 1);
 355         if (wps->oob_conf.dev_password == NULL) {
 356                 wpa_printf(MSG_ERROR, "WPS: Failed to allocate memory for OOB "
 357                            "device password");
 358                 wpabuf_free(data);
 359                 return NULL;
 360         }
 361
 362         if (wps_build_version(data) ||
 363             wps_build_oob_dev_password(data, wps) ||
 364             wps_build_wfa_ext(data, 0, NULL, 0)) {
 365                 wpa_printf(MSG_ERROR, "WPS: Build OOB device password "
 366                            "attribute error");
 367                 wpabuf_free(data);
 368                 return NULL;
 369         }
 370
 371         return data;
 372 }
 373
 374
 375 static int wps_parse_oob_dev_pwd(struct wps_context *wps,
 376                                  struct wpabuf *data)
 377 {
 378         struct oob_conf_data *oob_conf = &wps->oob_conf;
 379         struct wps_parse_attr attr;
 380         const u8 *pos;
 381
 382         if (wps_parse_msg(data, &attr) < 0 ||
 383             attr.oob_dev_password == NULL) {
 384                 wpa_printf(MSG_ERROR, "WPS: OOB device password not found");
 385                 return -1;
 386         }
 387
 388         pos = attr.oob_dev_password;
 389
 390         oob_conf->pubkey_hash =
 391                 wpabuf_alloc_copy(pos, WPS_OOB_PUBKEY_HASH_LEN);
 392         if (oob_conf->pubkey_hash == NULL) {
 393                 wpa_printf(MSG_ERROR, "WPS: Failed to allocate memory for OOB "
 394                            "public key hash");
 395                 return -1;
 396         }
 397         pos += WPS_OOB_PUBKEY_HASH_LEN;
 398
 399         wps->oob_dev_pw_id = WPA_GET_BE16(pos);
 400         pos += sizeof(wps->oob_dev_pw_id);
 401
 402         oob_conf->dev_password =
 403                 wpabuf_alloc(WPS_OOB_DEVICE_PASSWORD_LEN * 2 + 1);
 404         if (oob_conf->dev_password == NULL) {
 405                 wpa_printf(MSG_ERROR, "WPS: Failed to allocate memory for OOB "
 406                            "device password");
 407                 return -1;
 408         }
 409         wpa_snprintf_hex_uppercase(wpabuf_put(oob_conf->dev_password,
 410                                    wpabuf_size(oob_conf->dev_password)),
 411                                    wpabuf_size(oob_conf->dev_password), pos,
 412                                    WPS_OOB_DEVICE_PASSWORD_LEN);
 413
 414         return 0;
 415 }
 416
 417
 418 static int wps_parse_oob_cred(struct wps_context *wps, struct wpabuf *data)
 419 {
 420         struct wpabuf msg;
 421         struct wps_parse_attr attr;
 422         size_t i;
 423
 424         if (wps_parse_msg(data, &attr) < 0 || attr.num_cred <= 0) {
 425                 wpa_printf(MSG_ERROR, "WPS: OOB credential not found");
 426                 return -1;
 427         }
 428
 429         for (i = 0; i < attr.num_cred; i++) {
 430                 struct wps_credential local_cred;
 431                 struct wps_parse_attr cattr;
 432
 433                 os_memset(&local_cred, 0, sizeof(local_cred));
 434                 wpabuf_set(&msg, attr.cred[i], attr.cred_len[i]);
 435                 if (wps_parse_msg(&msg, &cattr) < 0 ||
 436                     wps_process_cred(&cattr, &local_cred)) {
 437                         wpa_printf(MSG_ERROR, "WPS: Failed to parse OOB "
 438                                    "credential");
 439                         return -1;
 440                 }
 441                 wps->cred_cb(wps->cb_ctx, &local_cred);
 442         }
 443
 444         return 0;
 445 }
 446
 447
 448 int wps_process_oob(struct wps_context *wps, struct oob_device_data *oob_dev,
 449                     int registrar)
 450 {
 451         struct wpabuf *data;
 452         int ret, write_f, oob_method = wps->oob_conf.oob_method;
 453         void *oob_priv;
 454
 455         write_f = oob_method == OOB_METHOD_DEV_PWD_E ? !registrar : registrar;
 456
 457         oob_priv = oob_dev->init_func(wps, oob_dev, registrar);
 458         if (oob_priv == NULL) {
 459                 wpa_printf(MSG_ERROR, "WPS: Failed to initialize OOB device");
 460                 return -1;
 461         }
 462
 463         if (write_f) {
 464                 if (oob_method == OOB_METHOD_CRED)
 465                         data = wps_get_oob_cred(wps);
 466                 else
 467                         data = wps_get_oob_dev_pwd(wps);
 468
 469                 ret = 0;
 470                 if (data == NULL || oob_dev->write_func(oob_priv, data) < 0)
 471                         ret = -1;
 472         } else {
 473                 data = oob_dev->read_func(oob_priv);
 474                 if (data == NULL)
 475                         ret = -1;
 476                 else {
 477                         if (oob_method == OOB_METHOD_CRED)
 478                                 ret = wps_parse_oob_cred(wps, data);
 479                         else
 480                                 ret = wps_parse_oob_dev_pwd(wps, data);
 481                 }
 482         }
 483         wpabuf_free(data);
 484         oob_dev->deinit_func(oob_priv);
 485
 486         if (ret < 0) {
 487                 wpa_printf(MSG_ERROR, "WPS: Failed to process OOB data");
 488                 return -1;
 489         }
 490
 491         return 0;
 492 }
 493
 494
 495 struct oob_device_data * wps_get_oob_device(char *device_type)
 496 {
 497 #ifdef CONFIG_WPS_UFD
 498         if (os_strstr(device_type, "ufd") != NULL)
 499                 return &oob_ufd_device_data;
 500 #endif /* CONFIG_WPS_UFD */
 501 #ifdef CONFIG_WPS_NFC
 502         if (os_strstr(device_type, "nfc") != NULL)
 503                 return &oob_nfc_device_data;
 504 #endif /* CONFIG_WPS_NFC */
 505
 506         return NULL;
 507 }
 508
 509
 510 #ifdef CONFIG_WPS_NFC
 511 struct oob_nfc_device_data * wps_get_oob_nfc_device(char *device_name)
 512 {
 513         if (device_name == NULL)
 514                 return NULL;
 515 #ifdef CONFIG_WPS_NFC_PN531
 516         if (os_strstr(device_name, "pn531") != NULL)
 517                 return &oob_nfc_pn531_device_data;
 518 #endif /* CONFIG_WPS_NFC_PN531 */
 519
 520         return NULL;
 521 }
 522 #endif /* CONFIG_WPS_NFC */
 523
 524
 525 int wps_get_oob_method(char *method)
 526 {
 527         if (os_strstr(method, "pin-e") != NULL)
 528                 return OOB_METHOD_DEV_PWD_E;
 529         if (os_strstr(method, "pin-r") != NULL)
 530                 return OOB_METHOD_DEV_PWD_R;
 531         if (os_strstr(method, "cred") != NULL)
 532                 return OOB_METHOD_CRED;
 533         return OOB_METHOD_UNKNOWN;
 534 }
 535
 536 #endif /* CONFIG_WPS_OOB */
 537
 538
 539 int wps_dev_type_str2bin(const char *str, u8 dev_type[WPS_DEV_TYPE_LEN])
 540 {
 541         const char *pos;
 542
 543         /* <categ>-<OUI>-<subcateg> */
 544         WPA_PUT_BE16(dev_type, atoi(str));
 545         pos = os_strchr(str, '-');
 546         if (pos == NULL)
 547                 return -1;
 548         pos++;
 549         if (hexstr2bin(pos, &dev_type[2], 4))
 550                 return -1;
 551         pos = os_strchr(pos, '-');
 552         if (pos == NULL)
 553                 return -1;
 554         pos++;
 555         WPA_PUT_BE16(&dev_type[6], atoi(pos));
 556
 557
 558         return 0;
 559 }
 560
 561
 562 char * wps_dev_type_bin2str(const u8 dev_type[WPS_DEV_TYPE_LEN], char *buf,
 563                             size_t buf_len)
 564 {
 565         int ret;
 566
 567         ret = os_snprintf(buf, buf_len, "%u-%08X-%u",
 568                           WPA_GET_BE16(dev_type), WPA_GET_BE32(&dev_type[2]),
 569                           WPA_GET_BE16(&dev_type[6]));
 570         if (ret < 0 || (unsigned int) ret >= buf_len)
 571                 return NULL;
 572
 573         return buf;
 574 }
 575
 576
 577 void uuid_gen_mac_addr(const u8 *mac_addr, u8 *uuid)
 578 {
 579         const u8 *addr[2];
 580         size_t len[2];
 581         u8 hash[SHA1_MAC_LEN];
 582         u8 nsid[16] = {
 583                 0x52, 0x64, 0x80, 0xf8,
 584                 0xc9, 0x9b,
 585                 0x4b, 0xe5,
 586                 0xa6, 0x55,
 587                 0x58, 0xed, 0x5f, 0x5d, 0x60, 0x84
 588         };
 589
 590         addr[0] = nsid;
 591         len[0] = sizeof(nsid);
 592         addr[1] = mac_addr;
 593         len[1] = 6;
 594         sha1_vector(2, addr, len, hash);
 595         os_memcpy(uuid, hash, 16);
 596
 597         /* Version: 5 = named-based version using SHA-1 */
 598         uuid[6] = (5 << 4) | (uuid[6] & 0x0f);
 599
 600         /* Variant specified in RFC 4122 */
 601         uuid[8] = 0x80 | (uuid[8] & 0x3f);
 602 }
 603
 604
 605 u16 wps_config_methods_str2bin(const char *str)
 606 {
 607         u16 methods = 0;
 608
 609         if (str == NULL) {
 610                 /* Default to enabling methods based on build configuration */
 611                 methods |= WPS_CONFIG_DISPLAY | WPS_CONFIG_KEYPAD;
 612 #ifdef CONFIG_WPS2
 613                 methods |= WPS_CONFIG_VIRT_DISPLAY;
 614 #endif /* CONFIG_WPS2 */
 615 #ifdef CONFIG_WPS_UFD
 616                 methods |= WPS_CONFIG_USBA;
 617 #endif /* CONFIG_WPS_UFD */
 618 #ifdef CONFIG_WPS_NFC
 619                 methods |= WPS_CONFIG_NFC_INTERFACE;
 620 #endif /* CONFIG_WPS_NFC */
 621         } else {
 622                 if (os_strstr(str, "usba"))
 623                         methods |= WPS_CONFIG_USBA;
 624                 if (os_strstr(str, "ethernet"))
 625                         methods |= WPS_CONFIG_ETHERNET;
 626                 if (os_strstr(str, "label"))
 627                         methods |= WPS_CONFIG_LABEL;
 628                 if (os_strstr(str, "display"))
 629                         methods |= WPS_CONFIG_DISPLAY;
 630                 if (os_strstr(str, "ext_nfc_token"))
 631                         methods |= WPS_CONFIG_EXT_NFC_TOKEN;
 632                 if (os_strstr(str, "int_nfc_token"))
 633                         methods |= WPS_CONFIG_INT_NFC_TOKEN;
 634                 if (os_strstr(str, "nfc_interface"))
 635                         methods |= WPS_CONFIG_NFC_INTERFACE;
 636                 if (os_strstr(str, "push_button"))
 637                         methods |= WPS_CONFIG_PUSHBUTTON;
 638                 if (os_strstr(str, "keypad"))
 639                         methods |= WPS_CONFIG_KEYPAD;
 640 #ifdef CONFIG_WPS2
 641                 if (os_strstr(str, "virtual_display"))
 642                         methods |= WPS_CONFIG_VIRT_DISPLAY;
 643                 if (os_strstr(str, "physical_display"))
 644                         methods |= WPS_CONFIG_PHY_DISPLAY;
 645                 if (os_strstr(str, "virtual_push_button"))
 646                         methods |= WPS_CONFIG_VIRT_PUSHBUTTON;
 647                 if (os_strstr(str, "physical_push_button"))
 648                         methods |= WPS_CONFIG_PHY_PUSHBUTTON;
 649 #endif /* CONFIG_WPS2 */
 650         }
 651
 652         return methods;
 653 }