1 /* 2 * Wi-Fi Protected Setup - common functionality 3 * Copyright (c) 2008-2012, Jouni Malinen <j (at) 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/aes_wrap.h" 13 #include "crypto/crypto.h" 14 #include "crypto/dh_group5.h" 15 #include "crypto/sha1.h" 16 #include "crypto/sha256.h" 17 #include "crypto/random.h" 18 #include "wps_i.h" 19 20 21 void wps_kdf(const u8 *key, const u8 *label_prefix, size_t label_prefix_len, 22 const char *label, u8 *res, size_t res_len) 23 { 24 u8 i_buf[4], key_bits[4]; 25 const u8 *addr[4]; 26 size_t len[4]; 27 int i, iter; 28 u8 hash[SHA256_MAC_LEN], *opos; 29 size_t left; 30 31 WPA_PUT_BE32(key_bits, res_len * 8); 32 33 addr[0] = i_buf; 34 len[0] = sizeof(i_buf); 35 addr[1] = label_prefix; 36 len[1] = label_prefix_len; 37 addr[2] = (const u8 *) label; 38 len[2] = os_strlen(label); 39 addr[3] = key_bits; 40 len[3] = sizeof(key_bits); 41 42 iter = (res_len + SHA256_MAC_LEN - 1) / SHA256_MAC_LEN; 43 opos = res; 44 left = res_len; 45 46 for (i = 1; i <= iter; i++) { 47 WPA_PUT_BE32(i_buf, i); 48 hmac_sha256_vector(key, SHA256_MAC_LEN, 4, addr, len, hash); 49 if (i < iter) { 50 os_memcpy(opos, hash, SHA256_MAC_LEN); 51 opos += SHA256_MAC_LEN; 52 left -= SHA256_MAC_LEN; 53 } else 54 os_memcpy(opos, hash, left); 55 } 56 } 57 58 59 int wps_derive_keys(struct wps_data *wps) 60 { 61 struct wpabuf *pubkey, *dh_shared; 62 u8 dhkey[SHA256_MAC_LEN], kdk[SHA256_MAC_LEN]; 63 const u8 *addr[3]; 64 size_t len[3]; 65 u8 keys[WPS_AUTHKEY_LEN + WPS_KEYWRAPKEY_LEN + WPS_EMSK_LEN]; 66 67 if (wps->dh_privkey == NULL) { 68 wpa_printf(MSG_DEBUG, "WPS: Own DH private key not available"); 69 return -1; 70 } 71 72 pubkey = wps->registrar ? wps->dh_pubkey_e : wps->dh_pubkey_r; 73 if (pubkey == NULL) { 74 wpa_printf(MSG_DEBUG, "WPS: Peer DH public key not available"); 75 return -1; 76 } 77 78 wpa_hexdump_buf_key(MSG_DEBUG, "WPS: DH Private Key", wps->dh_privkey); 79 wpa_hexdump_buf(MSG_DEBUG, "WPS: DH peer Public Key", pubkey); 80 dh_shared = dh5_derive_shared(wps->dh_ctx, pubkey, wps->dh_privkey); 81 dh5_free(wps->dh_ctx); 82 wps->dh_ctx = NULL; 83 dh_shared = wpabuf_zeropad(dh_shared, 192); 84 if (dh_shared == NULL) { 85 wpa_printf(MSG_DEBUG, "WPS: Failed to derive DH shared key"); 86 return -1; 87 } 88 89 /* Own DH private key is not needed anymore */ 90 wpabuf_free(wps->dh_privkey); 91 wps->dh_privkey = NULL; 92 93 wpa_hexdump_buf_key(MSG_DEBUG, "WPS: DH shared key", dh_shared); 94 95 /* DHKey = SHA-256(g^AB mod p) */ 96 addr[0] = wpabuf_head(dh_shared); 97 len[0] = wpabuf_len(dh_shared); 98 sha256_vector(1, addr, len, dhkey); 99 wpa_hexdump_key(MSG_DEBUG, "WPS: DHKey", dhkey, sizeof(dhkey)); 100 wpabuf_free(dh_shared); 101 102 /* KDK = HMAC-SHA-256_DHKey(N1 || EnrolleeMAC || N2) */ 103 addr[0] = wps->nonce_e; 104 len[0] = WPS_NONCE_LEN; 105 addr[1] = wps->mac_addr_e; 106 len[1] = ETH_ALEN; 107 addr[2] = wps->nonce_r; 108 len[2] = WPS_NONCE_LEN; 109 hmac_sha256_vector(dhkey, sizeof(dhkey), 3, addr, len, kdk); 110 wpa_hexdump_key(MSG_DEBUG, "WPS: KDK", kdk, sizeof(kdk)); 111 112 wps_kdf(kdk, NULL, 0, "Wi-Fi Easy and Secure Key Derivation", 113 keys, sizeof(keys)); 114 os_memcpy(wps->authkey, keys, WPS_AUTHKEY_LEN); 115 os_memcpy(wps->keywrapkey, keys + WPS_AUTHKEY_LEN, WPS_KEYWRAPKEY_LEN); 116 os_memcpy(wps->emsk, keys + WPS_AUTHKEY_LEN + WPS_KEYWRAPKEY_LEN, 117 WPS_EMSK_LEN); 118 119 wpa_hexdump_key(MSG_DEBUG, "WPS: AuthKey", 120 wps->authkey, WPS_AUTHKEY_LEN); 121 wpa_hexdump_key(MSG_DEBUG, "WPS: KeyWrapKey", 122 wps->keywrapkey, WPS_KEYWRAPKEY_LEN); 123 wpa_hexdump_key(MSG_DEBUG, "WPS: EMSK", wps->emsk, WPS_EMSK_LEN); 124 125 return 0; 126 } 127 128 129 void wps_derive_psk(struct wps_data *wps, const u8 *dev_passwd, 130 size_t dev_passwd_len) 131 { 132 u8 hash[SHA256_MAC_LEN]; 133 134 hmac_sha256(wps->authkey, WPS_AUTHKEY_LEN, dev_passwd, 135 (dev_passwd_len + 1) / 2, hash); 136 os_memcpy(wps->psk1, hash, WPS_PSK_LEN); 137 hmac_sha256(wps->authkey, WPS_AUTHKEY_LEN, 138 dev_passwd + (dev_passwd_len + 1) / 2, 139 dev_passwd_len / 2, hash); 140 os_memcpy(wps->psk2, hash, WPS_PSK_LEN); 141 142 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: Device Password", 143 dev_passwd, dev_passwd_len); 144 wpa_hexdump_key(MSG_DEBUG, "WPS: PSK1", wps->psk1, WPS_PSK_LEN); 145 wpa_hexdump_key(MSG_DEBUG, "WPS: PSK2", wps->psk2, WPS_PSK_LEN); 146 } 147 148 149 struct wpabuf * wps_decrypt_encr_settings(struct wps_data *wps, const u8 *encr, 150 size_t encr_len) 151 { 152 struct wpabuf *decrypted; 153 const size_t block_size = 16; 154 size_t i; 155 u8 pad; 156 const u8 *pos; 157 158 /* AES-128-CBC */ 159 if (encr == NULL || encr_len < 2 * block_size || encr_len % block_size) 160 { 161 wpa_printf(MSG_DEBUG, "WPS: No Encrypted Settings received"); 162 return NULL; 163 } 164 165 decrypted = wpabuf_alloc(encr_len - block_size); 166 if (decrypted == NULL) 167 return NULL; 168 169 wpa_hexdump(MSG_MSGDUMP, "WPS: Encrypted Settings", encr, encr_len); 170 wpabuf_put_data(decrypted, encr + block_size, encr_len - block_size); 171 if (aes_128_cbc_decrypt(wps->keywrapkey, encr, wpabuf_mhead(decrypted), 172 wpabuf_len(decrypted))) { 173 wpabuf_free(decrypted); 174 return NULL; 175 } 176 177 wpa_hexdump_buf_key(MSG_MSGDUMP, "WPS: Decrypted Encrypted Settings", 178 decrypted); 179 180 pos = wpabuf_head_u8(decrypted) + wpabuf_len(decrypted) - 1; 181 pad = *pos; 182 if (pad > wpabuf_len(decrypted)) { 183 wpa_printf(MSG_DEBUG, "WPS: Invalid PKCS#5 v2.0 pad value"); 184 wpabuf_free(decrypted); 185 return NULL; 186 } 187 for (i = 0; i < pad; i++) { 188 if (*pos-- != pad) { 189 wpa_printf(MSG_DEBUG, "WPS: Invalid PKCS#5 v2.0 pad " 190 "string"); 191 wpabuf_free(decrypted); 192 return NULL; 193 } 194 } 195 decrypted->used -= pad; 196 197 return decrypted; 198 } 199 200 201 /** 202 * wps_pin_checksum - Compute PIN checksum 203 * @pin: Seven digit PIN (i.e., eight digit PIN without the checksum digit) 204 * Returns: Checksum digit 205 */ 206 unsigned int wps_pin_checksum(unsigned int pin) 207 { 208 unsigned int accum = 0; 209 while (pin) { 210 accum += 3 * (pin % 10); 211 pin /= 10; 212 accum += pin % 10; 213 pin /= 10; 214 } 215 216 return (10 - accum % 10) % 10; 217 } 218 219 220 /** 221 * wps_pin_valid - Check whether a PIN has a valid checksum 222 * @pin: Eight digit PIN (i.e., including the checksum digit) 223 * Returns: 1 if checksum digit is valid, or 0 if not 224 */ 225 unsigned int wps_pin_valid(unsigned int pin) 226 { 227 return wps_pin_checksum(pin / 10) == (pin % 10); 228 } 229 230 231 /** 232 * wps_generate_pin - Generate a random PIN 233 * Returns: Eight digit PIN (i.e., including the checksum digit) 234 */ 235 unsigned int wps_generate_pin(void) 236 { 237 unsigned int val; 238 239 /* Generate seven random digits for the PIN */ 240 if (random_get_bytes((unsigned char *) &val, sizeof(val)) < 0) { 241 struct os_time now; 242 os_get_time(&now); 243 val = os_random() ^ now.sec ^ now.usec; 244 } 245 val %= 10000000; 246 247 /* Append checksum digit */ 248 return val * 10 + wps_pin_checksum(val); 249 } 250 251 252 int wps_pin_str_valid(const char *pin) 253 { 254 const char *p; 255 size_t len; 256 257 p = pin; 258 while (*p >= '0' && *p <= '9') 259 p++; 260 if (*p != '\0') 261 return 0; 262 263 len = p - pin; 264 return len == 4 || len == 8; 265 } 266 267 268 void wps_fail_event(struct wps_context *wps, enum wps_msg_type msg, 269 u16 config_error, u16 error_indication, const u8 *mac_addr) 270 { 271 union wps_event_data data; 272 273 if (wps->event_cb == NULL) 274 return; 275 276 os_memset(&data, 0, sizeof(data)); 277 data.fail.msg = msg; 278 data.fail.config_error = config_error; 279 data.fail.error_indication = error_indication; 280 os_memcpy(data.fail.peer_macaddr, mac_addr, ETH_ALEN); 281 wps->event_cb(wps->cb_ctx, WPS_EV_FAIL, &data); 282 } 283 284 285 void wps_success_event(struct wps_context *wps, const u8 *mac_addr) 286 { 287 union wps_event_data data; 288 289 if (wps->event_cb == NULL) 290 return; 291 292 os_memset(&data, 0, sizeof(data)); 293 os_memcpy(data.success.peer_macaddr, mac_addr, ETH_ALEN); 294 wps->event_cb(wps->cb_ctx, WPS_EV_SUCCESS, &data); 295 } 296 297 298 void wps_pwd_auth_fail_event(struct wps_context *wps, int enrollee, int part, 299 const u8 *mac_addr) 300 { 301 union wps_event_data data; 302 303 if (wps->event_cb == NULL) 304 return; 305 306 os_memset(&data, 0, sizeof(data)); 307 data.pwd_auth_fail.enrollee = enrollee; 308 data.pwd_auth_fail.part = part; 309 os_memcpy(data.pwd_auth_fail.peer_macaddr, mac_addr, ETH_ALEN); 310 wps->event_cb(wps->cb_ctx, WPS_EV_PWD_AUTH_FAIL, &data); 311 } 312 313 314 void wps_pbc_overlap_event(struct wps_context *wps) 315 { 316 if (wps->event_cb == NULL) 317 return; 318 319 wps->event_cb(wps->cb_ctx, WPS_EV_PBC_OVERLAP, NULL); 320 } 321 322 323 void wps_pbc_timeout_event(struct wps_context *wps) 324 { 325 if (wps->event_cb == NULL) 326 return; 327 328 wps->event_cb(wps->cb_ctx, WPS_EV_PBC_TIMEOUT, NULL); 329 } 330 331 332 void wps_pbc_active_event(struct wps_context *wps) 333 { 334 if (wps->event_cb == NULL) 335 return; 336 337 wps->event_cb(wps->cb_ctx, WPS_EV_PBC_ACTIVE, NULL); 338 } 339 340 341 void wps_pbc_disable_event(struct wps_context *wps) 342 { 343 if (wps->event_cb == NULL) 344 return; 345 346 wps->event_cb(wps->cb_ctx, WPS_EV_PBC_DISABLE, NULL); 347 } 348 349 350 #ifdef CONFIG_WPS_OOB 351 352 struct wpabuf * wps_get_oob_cred(struct wps_context *wps) 353 { 354 struct wps_data data; 355 struct wpabuf *plain; 356 357 plain = wpabuf_alloc(500); 358 if (plain == NULL) { 359 wpa_printf(MSG_ERROR, "WPS: Failed to allocate memory for OOB " 360 "credential"); 361 return NULL; 362 } 363 364 os_memset(&data, 0, sizeof(data)); 365 data.wps = wps; 366 data.auth_type = wps->auth_types; 367 data.encr_type = wps->encr_types; 368 if (wps_build_version(plain) || 369 wps_build_cred(&data, plain) || 370 wps_build_wfa_ext(plain, 0, NULL, 0)) { 371 os_free(data.new_psk); 372 wpabuf_free(plain); 373 return NULL; 374 } 375 376 if (wps->wps_state == WPS_STATE_NOT_CONFIGURED && data.new_psk && 377 wps->ap) { 378 struct wps_credential cred; 379 380 wpa_printf(MSG_DEBUG, "WPS: Moving to Configured state based " 381 "on credential token generation"); 382 383 os_memset(&cred, 0, sizeof(cred)); 384 os_memcpy(cred.ssid, wps->ssid, wps->ssid_len); 385 cred.ssid_len = wps->ssid_len; 386 cred.auth_type = WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK; 387 cred.encr_type = WPS_ENCR_TKIP | WPS_ENCR_AES; 388 os_memcpy(cred.key, data.new_psk, data.new_psk_len); 389 cred.key_len = data.new_psk_len; 390 391 wps->wps_state = WPS_STATE_CONFIGURED; 392 wpa_hexdump_ascii_key(MSG_DEBUG, 393 "WPS: Generated random passphrase", 394 data.new_psk, data.new_psk_len); 395 if (wps->cred_cb) 396 wps->cred_cb(wps->cb_ctx, &cred); 397 } 398 399 os_free(data.new_psk); 400 401 return plain; 402 } 403 404 405 struct wpabuf * wps_build_nfc_pw_token(u16 dev_pw_id, 406 const struct wpabuf *pubkey, 407 const struct wpabuf *dev_pw) 408 { 409 struct wpabuf *data; 410 411 data = wpabuf_alloc(200); 412 if (data == NULL) 413 return NULL; 414 415 if (wps_build_version(data) || 416 wps_build_oob_dev_pw(data, dev_pw_id, pubkey, 417 wpabuf_head(dev_pw), wpabuf_len(dev_pw)) || 418 wps_build_wfa_ext(data, 0, NULL, 0)) { 419 wpa_printf(MSG_ERROR, "WPS: Failed to build NFC password " 420 "token"); 421 wpabuf_free(data); 422 return NULL; 423 } 424 425 return data; 426 } 427 428 429 int wps_oob_use_cred(struct wps_context *wps, struct wps_parse_attr *attr) 430 { 431 struct wpabuf msg; 432 size_t i; 433 434 for (i = 0; i < attr->num_cred; i++) { 435 struct wps_credential local_cred; 436 struct wps_parse_attr cattr; 437 438 os_memset(&local_cred, 0, sizeof(local_cred)); 439 wpabuf_set(&msg, attr->cred[i], attr->cred_len[i]); 440 if (wps_parse_msg(&msg, &cattr) < 0 || 441 wps_process_cred(&cattr, &local_cred)) { 442 wpa_printf(MSG_ERROR, "WPS: Failed to parse OOB " 443 "credential"); 444 return -1; 445 } 446 wps->cred_cb(wps->cb_ctx, &local_cred); 447 } 448 449 return 0; 450 } 451 452 453 #endif /* CONFIG_WPS_OOB */ 454 455 456 int wps_dev_type_str2bin(const char *str, u8 dev_type[WPS_DEV_TYPE_LEN]) 457 { 458 const char *pos; 459 460 /* <categ>-<OUI>-<subcateg> */ 461 WPA_PUT_BE16(dev_type, atoi(str)); 462 pos = os_strchr(str, '-'); 463 if (pos == NULL) 464 return -1; 465 pos++; 466 if (hexstr2bin(pos, &dev_type[2], 4)) 467 return -1; 468 pos = os_strchr(pos, '-'); 469 if (pos == NULL) 470 return -1; 471 pos++; 472 WPA_PUT_BE16(&dev_type[6], atoi(pos)); 473 474 475 return 0; 476 } 477 478 479 char * wps_dev_type_bin2str(const u8 dev_type[WPS_DEV_TYPE_LEN], char *buf, 480 size_t buf_len) 481 { 482 int ret; 483 484 ret = os_snprintf(buf, buf_len, "%u-%08X-%u", 485 WPA_GET_BE16(dev_type), WPA_GET_BE32(&dev_type[2]), 486 WPA_GET_BE16(&dev_type[6])); 487 if (ret < 0 || (unsigned int) ret >= buf_len) 488 return NULL; 489 490 return buf; 491 } 492 493 494 void uuid_gen_mac_addr(const u8 *mac_addr, u8 *uuid) 495 { 496 const u8 *addr[2]; 497 size_t len[2]; 498 u8 hash[SHA1_MAC_LEN]; 499 u8 nsid[16] = { 500 0x52, 0x64, 0x80, 0xf8, 501 0xc9, 0x9b, 502 0x4b, 0xe5, 503 0xa6, 0x55, 504 0x58, 0xed, 0x5f, 0x5d, 0x60, 0x84 505 }; 506 507 addr[0] = nsid; 508 len[0] = sizeof(nsid); 509 addr[1] = mac_addr; 510 len[1] = 6; 511 sha1_vector(2, addr, len, hash); 512 os_memcpy(uuid, hash, 16); 513 514 /* Version: 5 = named-based version using SHA-1 */ 515 uuid[6] = (5 << 4) | (uuid[6] & 0x0f); 516 517 /* Variant specified in RFC 4122 */ 518 uuid[8] = 0x80 | (uuid[8] & 0x3f); 519 } 520 521 522 u16 wps_config_methods_str2bin(const char *str) 523 { 524 u16 methods = 0; 525 526 if (str == NULL) { 527 /* Default to enabling methods based on build configuration */ 528 methods |= WPS_CONFIG_DISPLAY | WPS_CONFIG_KEYPAD; 529 #ifdef CONFIG_WPS2 530 methods |= WPS_CONFIG_VIRT_DISPLAY; 531 #endif /* CONFIG_WPS2 */ 532 #ifdef CONFIG_WPS_NFC 533 methods |= WPS_CONFIG_NFC_INTERFACE; 534 #endif /* CONFIG_WPS_NFC */ 535 } else { 536 if (os_strstr(str, "ethernet")) 537 methods |= WPS_CONFIG_ETHERNET; 538 if (os_strstr(str, "label")) 539 methods |= WPS_CONFIG_LABEL; 540 if (os_strstr(str, "display")) 541 methods |= WPS_CONFIG_DISPLAY; 542 if (os_strstr(str, "ext_nfc_token")) 543 methods |= WPS_CONFIG_EXT_NFC_TOKEN; 544 if (os_strstr(str, "int_nfc_token")) 545 methods |= WPS_CONFIG_INT_NFC_TOKEN; 546 if (os_strstr(str, "nfc_interface")) 547 methods |= WPS_CONFIG_NFC_INTERFACE; 548 if (os_strstr(str, "push_button")) 549 methods |= WPS_CONFIG_PUSHBUTTON; 550 if (os_strstr(str, "keypad")) 551 methods |= WPS_CONFIG_KEYPAD; 552 #ifdef CONFIG_WPS2 553 if (os_strstr(str, "virtual_display")) 554 methods |= WPS_CONFIG_VIRT_DISPLAY; 555 if (os_strstr(str, "physical_display")) 556 methods |= WPS_CONFIG_PHY_DISPLAY; 557 if (os_strstr(str, "virtual_push_button")) 558 methods |= WPS_CONFIG_VIRT_PUSHBUTTON; 559 if (os_strstr(str, "physical_push_button")) 560 methods |= WPS_CONFIG_PHY_PUSHBUTTON; 561 #endif /* CONFIG_WPS2 */ 562 } 563 564 return methods; 565 } 566 567 568 struct wpabuf * wps_build_wsc_ack(struct wps_data *wps) 569 { 570 struct wpabuf *msg; 571 572 wpa_printf(MSG_DEBUG, "WPS: Building Message WSC_ACK"); 573 574 msg = wpabuf_alloc(1000); 575 if (msg == NULL) 576 return NULL; 577 578 if (wps_build_version(msg) || 579 wps_build_msg_type(msg, WPS_WSC_ACK) || 580 wps_build_enrollee_nonce(wps, msg) || 581 wps_build_registrar_nonce(wps, msg) || 582 wps_build_wfa_ext(msg, 0, NULL, 0)) { 583 wpabuf_free(msg); 584 return NULL; 585 } 586 587 return msg; 588 } 589 590 591 struct wpabuf * wps_build_wsc_nack(struct wps_data *wps) 592 { 593 struct wpabuf *msg; 594 595 wpa_printf(MSG_DEBUG, "WPS: Building Message WSC_NACK"); 596 597 msg = wpabuf_alloc(1000); 598 if (msg == NULL) 599 return NULL; 600 601 if (wps_build_version(msg) || 602 wps_build_msg_type(msg, WPS_WSC_NACK) || 603 wps_build_enrollee_nonce(wps, msg) || 604 wps_build_registrar_nonce(wps, msg) || 605 wps_build_config_error(msg, wps->config_error) || 606 wps_build_wfa_ext(msg, 0, NULL, 0)) { 607 wpabuf_free(msg); 608 return NULL; 609 } 610 611 return msg; 612 } 613 614 615 #ifdef CONFIG_WPS_NFC 616 617 struct wpabuf * wps_nfc_token_build(int ndef, int id, struct wpabuf *pubkey, 618 struct wpabuf *dev_pw) 619 { 620 struct wpabuf *ret; 621 622 if (pubkey == NULL || dev_pw == NULL) 623 return NULL; 624 625 ret = wps_build_nfc_pw_token(id, pubkey, dev_pw); 626 if (ndef && ret) { 627 struct wpabuf *tmp; 628 tmp = ndef_build_wifi(ret); 629 wpabuf_free(ret); 630 if (tmp == NULL) 631 return NULL; 632 ret = tmp; 633 } 634 635 return ret; 636 } 637 638 639 struct wpabuf * wps_nfc_token_gen(int ndef, int *id, struct wpabuf **pubkey, 640 struct wpabuf **privkey, 641 struct wpabuf **dev_pw) 642 { 643 struct wpabuf *priv = NULL, *pub = NULL, *pw; 644 void *dh_ctx; 645 u16 val; 646 647 pw = wpabuf_alloc(WPS_OOB_DEVICE_PASSWORD_LEN); 648 if (pw == NULL) 649 return NULL; 650 651 if (random_get_bytes(wpabuf_put(pw, WPS_OOB_DEVICE_PASSWORD_LEN), 652 WPS_OOB_DEVICE_PASSWORD_LEN) || 653 random_get_bytes((u8 *) &val, sizeof(val))) { 654 wpabuf_free(pw); 655 return NULL; 656 } 657 658 dh_ctx = dh5_init(&priv, &pub); 659 if (dh_ctx == NULL) { 660 wpabuf_free(pw); 661 return NULL; 662 } 663 dh5_free(dh_ctx); 664 665 *id = 0x10 + val % 0xfff0; 666 wpabuf_free(*pubkey); 667 *pubkey = pub; 668 wpabuf_free(*privkey); 669 *privkey = priv; 670 wpabuf_free(*dev_pw); 671 *dev_pw = pw; 672 673 return wps_nfc_token_build(ndef, *id, *pubkey, *dev_pw); 674 } 675 676 #endif /* CONFIG_WPS_NFC */ 677
