src/wps/wps_enrollee.c

   1 /*
   2  * Wi-Fi Protected Setup - Enrollee
   3  * Copyright (c) 2008, 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 "sha256.h"
  19 #include "wps_i.h"
  20 #include "wps_dev_attr.h"
  21 #include "crypto.h"
  22
  23
  24 static int wps_build_mac_addr(struct wps_data *wps, struct wpabuf *msg)
  25 {
  26         wpa_printf(MSG_DEBUG, "WPS:  * MAC Address");
  27         wpabuf_put_be16(msg, ATTR_MAC_ADDR);
  28         wpabuf_put_be16(msg, ETH_ALEN);
  29         wpabuf_put_data(msg, wps->mac_addr_e, ETH_ALEN);
  30         return 0;
  31 }
  32
  33
  34 static int wps_build_wps_state(struct wps_data *wps, struct wpabuf *msg)
  35 {
  36         u8 state;
  37         if (wps->wps->ap)
  38                 state = wps->wps->wps_state;
  39         else
  40                 state = WPS_STATE_NOT_CONFIGURED;
  41         wpa_printf(MSG_DEBUG, "WPS:  * Wi-Fi Protected Setup State (%d)",
  42                    state);
  43         wpabuf_put_be16(msg, ATTR_WPS_STATE);
  44         wpabuf_put_be16(msg, 1);
  45         wpabuf_put_u8(msg, state);
  46         return 0;
  47 }
  48
  49
  50 static int wps_build_e_hash(struct wps_data *wps, struct wpabuf *msg)
  51 {
  52         u8 *hash;
  53         const u8 *addr[4];
  54         size_t len[4];
  55
  56         if (os_get_random(wps->snonce, 2 * WPS_SECRET_NONCE_LEN) < 0)
  57                 return -1;
  58         wpa_hexdump(MSG_DEBUG, "WPS: E-S1", wps->snonce, WPS_SECRET_NONCE_LEN);
  59         wpa_hexdump(MSG_DEBUG, "WPS: E-S2",
  60                     wps->snonce + WPS_SECRET_NONCE_LEN, WPS_SECRET_NONCE_LEN);
  61
  62         if (wps->dh_pubkey_e == NULL || wps->dh_pubkey_r == NULL) {
  63                 wpa_printf(MSG_DEBUG, "WPS: DH public keys not available for "
  64                            "E-Hash derivation");
  65                 return -1;
  66         }
  67
  68         wpa_printf(MSG_DEBUG, "WPS:  * E-Hash1");
  69         wpabuf_put_be16(msg, ATTR_E_HASH1);
  70         wpabuf_put_be16(msg, SHA256_MAC_LEN);
  71         hash = wpabuf_put(msg, SHA256_MAC_LEN);
  72         /* E-Hash1 = HMAC_AuthKey(E-S1 || PSK1 || PK_E || PK_R) */
  73         addr[0] = wps->snonce;
  74         len[0] = WPS_SECRET_NONCE_LEN;
  75         addr[1] = wps->psk1;
  76         len[1] = WPS_PSK_LEN;
  77         addr[2] = wpabuf_head(wps->dh_pubkey_e);
  78         len[2] = wpabuf_len(wps->dh_pubkey_e);
  79         addr[3] = wpabuf_head(wps->dh_pubkey_r);
  80         len[3] = wpabuf_len(wps->dh_pubkey_r);
  81         hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
  82         wpa_hexdump(MSG_DEBUG, "WPS: E-Hash1", hash, SHA256_MAC_LEN);
  83
  84         wpa_printf(MSG_DEBUG, "WPS:  * E-Hash2");
  85         wpabuf_put_be16(msg, ATTR_E_HASH2);
  86         wpabuf_put_be16(msg, SHA256_MAC_LEN);
  87         hash = wpabuf_put(msg, SHA256_MAC_LEN);
  88         /* E-Hash2 = HMAC_AuthKey(E-S2 || PSK2 || PK_E || PK_R) */
  89         addr[0] = wps->snonce + WPS_SECRET_NONCE_LEN;
  90         addr[1] = wps->psk2;
  91         hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
  92         wpa_hexdump(MSG_DEBUG, "WPS: E-Hash2", hash, SHA256_MAC_LEN);
  93
  94         return 0;
  95 }
  96
  97
  98 static int wps_build_e_snonce1(struct wps_data *wps, struct wpabuf *msg)
  99 {
 100         wpa_printf(MSG_DEBUG, "WPS:  * E-SNonce1");
 101         wpabuf_put_be16(msg, ATTR_E_SNONCE1);
 102         wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN);
 103         wpabuf_put_data(msg, wps->snonce, WPS_SECRET_NONCE_LEN);
 104         return 0;
 105 }
 106
 107
 108 static int wps_build_e_snonce2(struct wps_data *wps, struct wpabuf *msg)
 109 {
 110         wpa_printf(MSG_DEBUG, "WPS:  * E-SNonce2");
 111         wpabuf_put_be16(msg, ATTR_E_SNONCE2);
 112         wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN);
 113         wpabuf_put_data(msg, wps->snonce + WPS_SECRET_NONCE_LEN,
 114                         WPS_SECRET_NONCE_LEN);
 115         return 0;
 116 }
 117
 118
 119 static struct wpabuf * wps_build_m1(struct wps_data *wps)
 120 {
 121         struct wpabuf *msg;
 122         u16 methods;
 123
 124         if (os_get_random(wps->nonce_e, WPS_NONCE_LEN) < 0)
 125                 return NULL;
 126         wpa_hexdump(MSG_DEBUG, "WPS: Enrollee Nonce",
 127                     wps->nonce_e, WPS_NONCE_LEN);
 128
 129         wpa_printf(MSG_DEBUG, "WPS: Building Message M1");
 130         msg = wpabuf_alloc(1000);
 131         if (msg == NULL)
 132                 return NULL;
 133
 134         methods = WPS_CONFIG_LABEL | WPS_CONFIG_DISPLAY | WPS_CONFIG_KEYPAD;
 135 #ifdef CONFIG_WPS_UFD
 136         methods |= WPS_CONFIG_USBA;
 137 #endif /* CONFIG_WPS_UFD */
 138 #ifdef CONFIG_WPS_NFC
 139         methods |= WPS_CONFIG_NFC_INTERFACE;
 140 #endif /* CONFIG_WPS_NFC */
 141         if (wps->pbc)
 142                 methods |= WPS_CONFIG_PUSHBUTTON;
 143
 144         if (wps_build_version(msg) ||
 145             wps_build_msg_type(msg, WPS_M1) ||
 146             wps_build_uuid_e(msg, wps->uuid_e) ||
 147             wps_build_mac_addr(wps, msg) ||
 148             wps_build_enrollee_nonce(wps, msg) ||
 149             wps_build_public_key(wps, msg) ||
 150             wps_build_auth_type_flags(wps, msg) ||
 151             wps_build_encr_type_flags(wps, msg) ||
 152             wps_build_conn_type_flags(wps, msg) ||
 153             wps_build_config_methods(msg, methods) ||
 154             wps_build_wps_state(wps, msg) ||
 155             wps_build_device_attrs(&wps->wps->dev, msg) ||
 156             wps_build_rf_bands(&wps->wps->dev, msg) ||
 157             wps_build_assoc_state(wps, msg) ||
 158             wps_build_dev_password_id(msg, wps->dev_pw_id) ||
 159             wps_build_config_error(msg, WPS_CFG_NO_ERROR) ||
 160             wps_build_os_version(&wps->wps->dev, msg)) {
 161                 wpabuf_free(msg);
 162                 return NULL;
 163         }
 164
 165         wps->state = RECV_M2;
 166         return msg;
 167 }
 168
 169
 170 static struct wpabuf * wps_build_m3(struct wps_data *wps)
 171 {
 172         struct wpabuf *msg;
 173
 174         wpa_printf(MSG_DEBUG, "WPS: Building Message M3");
 175
 176         if (wps->dev_password == NULL) {
 177                 wpa_printf(MSG_DEBUG, "WPS: No Device Password available");
 178                 return NULL;
 179         }
 180         wps_derive_psk(wps, wps->dev_password, wps->dev_password_len);
 181
 182         msg = wpabuf_alloc(1000);
 183         if (msg == NULL)
 184                 return NULL;
 185
 186         if (wps_build_version(msg) ||
 187             wps_build_msg_type(msg, WPS_M3) ||
 188             wps_build_registrar_nonce(wps, msg) ||
 189             wps_build_e_hash(wps, msg) ||
 190             wps_build_authenticator(wps, msg)) {
 191                 wpabuf_free(msg);
 192                 return NULL;
 193         }
 194
 195         wps->state = RECV_M4;
 196         return msg;
 197 }
 198
 199
 200 static struct wpabuf * wps_build_m5(struct wps_data *wps)
 201 {
 202         struct wpabuf *msg, *plain;
 203
 204         wpa_printf(MSG_DEBUG, "WPS: Building Message M5");
 205
 206         plain = wpabuf_alloc(200);
 207         if (plain == NULL)
 208                 return NULL;
 209
 210         msg = wpabuf_alloc(1000);
 211         if (msg == NULL) {
 212                 wpabuf_free(plain);
 213                 return NULL;
 214         }
 215
 216         if (wps_build_version(msg) ||
 217             wps_build_msg_type(msg, WPS_M5) ||
 218             wps_build_registrar_nonce(wps, msg) ||
 219             wps_build_e_snonce1(wps, plain) ||
 220             wps_build_key_wrap_auth(wps, plain) ||
 221             wps_build_encr_settings(wps, msg, plain) ||
 222             wps_build_authenticator(wps, msg)) {
 223                 wpabuf_free(plain);
 224                 wpabuf_free(msg);
 225                 return NULL;
 226         }
 227         wpabuf_free(plain);
 228
 229         wps->state = RECV_M6;
 230         return msg;
 231 }
 232
 233
 234 static int wps_build_cred_ssid(struct wps_data *wps, struct wpabuf *msg)
 235 {
 236         wpa_printf(MSG_DEBUG, "WPS:  * SSID");
 237         wpabuf_put_be16(msg, ATTR_SSID);
 238         wpabuf_put_be16(msg, wps->wps->ssid_len);
 239         wpabuf_put_data(msg, wps->wps->ssid, wps->wps->ssid_len);
 240         return 0;
 241 }
 242
 243
 244 static int wps_build_cred_auth_type(struct wps_data *wps, struct wpabuf *msg)
 245 {
 246         wpa_printf(MSG_DEBUG, "WPS:  * Authentication Type");
 247         wpabuf_put_be16(msg, ATTR_AUTH_TYPE);
 248         wpabuf_put_be16(msg, 2);
 249         wpabuf_put_be16(msg, wps->wps->auth_types);
 250         return 0;
 251 }
 252
 253
 254 static int wps_build_cred_encr_type(struct wps_data *wps, struct wpabuf *msg)
 255 {
 256         wpa_printf(MSG_DEBUG, "WPS:  * Encryption Type");
 257         wpabuf_put_be16(msg, ATTR_ENCR_TYPE);
 258         wpabuf_put_be16(msg, 2);
 259         wpabuf_put_be16(msg, wps->wps->encr_types);
 260         return 0;
 261 }
 262
 263
 264 static int wps_build_cred_network_key(struct wps_data *wps, struct wpabuf *msg)
 265 {
 266         wpa_printf(MSG_DEBUG, "WPS:  * Network Key");
 267         wpabuf_put_be16(msg, ATTR_NETWORK_KEY);
 268         wpabuf_put_be16(msg, wps->wps->network_key_len);
 269         wpabuf_put_data(msg, wps->wps->network_key, wps->wps->network_key_len);
 270         return 0;
 271 }
 272
 273
 274 static int wps_build_cred_mac_addr(struct wps_data *wps, struct wpabuf *msg)
 275 {
 276         wpa_printf(MSG_DEBUG, "WPS:  * MAC Address (AP BSSID)");
 277         wpabuf_put_be16(msg, ATTR_MAC_ADDR);
 278         wpabuf_put_be16(msg, ETH_ALEN);
 279         wpabuf_put_data(msg, wps->wps->dev.mac_addr, ETH_ALEN);
 280         return 0;
 281 }
 282
 283
 284 static int wps_build_ap_settings(struct wps_data *wps, struct wpabuf *plain)
 285 {
 286         if (wps->wps->ap_settings) {
 287                 wpa_printf(MSG_DEBUG, "WPS:  * AP Settings (pre-configured)");
 288                 wpabuf_put_data(plain, wps->wps->ap_settings,
 289                                 wps->wps->ap_settings_len);
 290                 return 0;
 291         }
 292
 293         return wps_build_cred_ssid(wps, plain) ||
 294                 wps_build_cred_mac_addr(wps, plain) ||
 295                 wps_build_cred_auth_type(wps, plain) ||
 296                 wps_build_cred_encr_type(wps, plain) ||
 297                 wps_build_cred_network_key(wps, plain);
 298 }
 299
 300
 301 static struct wpabuf * wps_build_m7(struct wps_data *wps)
 302 {
 303         struct wpabuf *msg, *plain;
 304
 305         wpa_printf(MSG_DEBUG, "WPS: Building Message M7");
 306
 307         plain = wpabuf_alloc(500 + wps->wps->ap_settings_len);
 308         if (plain == NULL)
 309                 return NULL;
 310
 311         msg = wpabuf_alloc(1000 + wps->wps->ap_settings_len);
 312         if (msg == NULL) {
 313                 wpabuf_free(plain);
 314                 return NULL;
 315         }
 316
 317         if (wps_build_version(msg) ||
 318             wps_build_msg_type(msg, WPS_M7) ||
 319             wps_build_registrar_nonce(wps, msg) ||
 320             wps_build_e_snonce2(wps, plain) ||
 321             (wps->wps->ap && wps_build_ap_settings(wps, plain)) ||
 322             wps_build_key_wrap_auth(wps, plain) ||
 323             wps_build_encr_settings(wps, msg, plain) ||
 324             wps_build_authenticator(wps, msg)) {
 325                 wpabuf_free(plain);
 326                 wpabuf_free(msg);
 327                 return NULL;
 328         }
 329         wpabuf_free(plain);
 330
 331         wps->state = RECV_M8;
 332         return msg;
 333 }
 334
 335
 336 static struct wpabuf * wps_build_wsc_done(struct wps_data *wps)
 337 {
 338         struct wpabuf *msg;
 339
 340         wpa_printf(MSG_DEBUG, "WPS: Building Message WSC_Done");
 341
 342         msg = wpabuf_alloc(1000);
 343         if (msg == NULL)
 344                 return NULL;
 345
 346         if (wps_build_version(msg) ||
 347             wps_build_msg_type(msg, WPS_WSC_DONE) ||
 348             wps_build_enrollee_nonce(wps, msg) ||
 349             wps_build_registrar_nonce(wps, msg)) {
 350                 wpabuf_free(msg);
 351                 return NULL;
 352         }
 353
 354         if (wps->wps->ap)
 355                 wps->state = RECV_ACK;
 356         else {
 357                 wps_success_event(wps->wps);
 358                 wps->state = WPS_FINISHED;
 359         }
 360         return msg;
 361 }
 362
 363
 364 static struct wpabuf * wps_build_wsc_ack(struct wps_data *wps)
 365 {
 366         struct wpabuf *msg;
 367
 368         wpa_printf(MSG_DEBUG, "WPS: Building Message WSC_ACK");
 369
 370         msg = wpabuf_alloc(1000);
 371         if (msg == NULL)
 372                 return NULL;
 373
 374         if (wps_build_version(msg) ||
 375             wps_build_msg_type(msg, WPS_WSC_ACK) ||
 376             wps_build_enrollee_nonce(wps, msg) ||
 377             wps_build_registrar_nonce(wps, msg)) {
 378                 wpabuf_free(msg);
 379                 return NULL;
 380         }
 381
 382         return msg;
 383 }
 384
 385
 386 static struct wpabuf * wps_build_wsc_nack(struct wps_data *wps)
 387 {
 388         struct wpabuf *msg;
 389
 390         wpa_printf(MSG_DEBUG, "WPS: Building Message WSC_NACK");
 391
 392         msg = wpabuf_alloc(1000);
 393         if (msg == NULL)
 394                 return NULL;
 395
 396         if (wps_build_version(msg) ||
 397             wps_build_msg_type(msg, WPS_WSC_NACK) ||
 398             wps_build_enrollee_nonce(wps, msg) ||
 399             wps_build_registrar_nonce(wps, msg) ||
 400             wps_build_config_error(msg, wps->config_error)) {
 401                 wpabuf_free(msg);
 402                 return NULL;
 403         }
 404
 405         return msg;
 406 }
 407
 408
 409 struct wpabuf * wps_enrollee_get_msg(struct wps_data *wps,
 410                                      enum wsc_op_code *op_code)
 411 {
 412         struct wpabuf *msg;
 413
 414         switch (wps->state) {
 415         case SEND_M1:
 416                 msg = wps_build_m1(wps);
 417                 *op_code = WSC_MSG;
 418                 break;
 419         case SEND_M3:
 420                 msg = wps_build_m3(wps);
 421                 *op_code = WSC_MSG;
 422                 break;
 423         case SEND_M5:
 424                 msg = wps_build_m5(wps);
 425                 *op_code = WSC_MSG;
 426                 break;
 427         case SEND_M7:
 428                 msg = wps_build_m7(wps);
 429                 *op_code = WSC_MSG;
 430                 break;
 431         case RECEIVED_M2D:
 432                 if (wps->wps->ap) {
 433                         msg = wps_build_wsc_nack(wps);
 434                         *op_code = WSC_NACK;
 435                         break;
 436                 }
 437                 msg = wps_build_wsc_ack(wps);
 438                 *op_code = WSC_ACK;
 439                 if (msg) {
 440                         /* Another M2/M2D may be received */
 441                         wps->state = RECV_M2;
 442                 }
 443                 break;
 444         case SEND_WSC_NACK:
 445                 msg = wps_build_wsc_nack(wps);
 446                 *op_code = WSC_NACK;
 447                 break;
 448         case WPS_MSG_DONE:
 449                 msg = wps_build_wsc_done(wps);
 450                 *op_code = WSC_Done;
 451                 break;
 452         default:
 453                 wpa_printf(MSG_DEBUG, "WPS: Unsupported state %d for building "
 454                            "a message", wps->state);
 455                 msg = NULL;
 456                 break;
 457         }
 458
 459         if (*op_code == WSC_MSG && msg) {
 460                 /* Save a copy of the last message for Authenticator derivation
 461                  */
 462                 wpabuf_free(wps->last_msg);
 463                 wps->last_msg = wpabuf_dup(msg);
 464         }
 465
 466         return msg;
 467 }
 468
 469
 470 static int wps_process_registrar_nonce(struct wps_data *wps, const u8 *r_nonce)
 471 {
 472         if (r_nonce == NULL) {
 473                 wpa_printf(MSG_DEBUG, "WPS: No Registrar Nonce received");
 474                 return -1;
 475         }
 476
 477         os_memcpy(wps->nonce_r, r_nonce, WPS_NONCE_LEN);
 478         wpa_hexdump(MSG_DEBUG, "WPS: Registrar Nonce",
 479                     wps->nonce_r, WPS_NONCE_LEN);
 480
 481         return 0;
 482 }
 483
 484
 485 static int wps_process_enrollee_nonce(struct wps_data *wps, const u8 *e_nonce)
 486 {
 487         if (e_nonce == NULL) {
 488                 wpa_printf(MSG_DEBUG, "WPS: No Enrollee Nonce received");
 489                 return -1;
 490         }
 491
 492         if (os_memcmp(wps->nonce_e, e_nonce, WPS_NONCE_LEN) != 0) {
 493                 wpa_printf(MSG_DEBUG, "WPS: Invalid Enrollee Nonce received");
 494                 return -1;
 495         }
 496
 497         return 0;
 498 }
 499
 500
 501 static int wps_process_uuid_r(struct wps_data *wps, const u8 *uuid_r)
 502 {
 503         if (uuid_r == NULL) {
 504                 wpa_printf(MSG_DEBUG, "WPS: No UUID-R received");
 505                 return -1;
 506         }
 507
 508         os_memcpy(wps->uuid_r, uuid_r, WPS_UUID_LEN);
 509         wpa_hexdump(MSG_DEBUG, "WPS: UUID-R", wps->uuid_r, WPS_UUID_LEN);
 510
 511         return 0;
 512 }
 513
 514
 515 static int wps_process_pubkey(struct wps_data *wps, const u8 *pk,
 516                               size_t pk_len)
 517 {
 518         if (pk == NULL || pk_len == 0) {
 519                 wpa_printf(MSG_DEBUG, "WPS: No Public Key received");
 520                 return -1;
 521         }
 522
 523 #ifdef CONFIG_WPS_OOB
 524         if (wps->dev_pw_id != DEV_PW_DEFAULT &&
 525             wps->wps->oob_conf.pubkey_hash) {
 526                 const u8 *addr[1];
 527                 u8 hash[WPS_HASH_LEN];
 528
 529                 addr[0] = pk;
 530                 sha256_vector(1, addr, &pk_len, hash);
 531                 if (os_memcmp(hash,
 532                               wpabuf_head(wps->wps->oob_conf.pubkey_hash),
 533                               WPS_OOB_PUBKEY_HASH_LEN) != 0) {
 534                         wpa_printf(MSG_ERROR, "WPS: Public Key hash error");
 535                         return -1;
 536                 }
 537         }
 538 #endif /* CONFIG_WPS_OOB */
 539
 540         wpabuf_free(wps->dh_pubkey_r);
 541         wps->dh_pubkey_r = wpabuf_alloc_copy(pk, pk_len);
 542         if (wps->dh_pubkey_r == NULL)
 543                 return -1;
 544
 545         if (wps_derive_keys(wps) < 0)
 546                 return -1;
 547
 548         if (wps->request_type == WPS_REQ_WLAN_MANAGER_REGISTRAR &&
 549             wps_derive_mgmt_keys(wps) < 0)
 550                 return -1;
 551
 552         return 0;
 553 }
 554
 555
 556 static int wps_process_r_hash1(struct wps_data *wps, const u8 *r_hash1)
 557 {
 558         if (r_hash1 == NULL) {
 559                 wpa_printf(MSG_DEBUG, "WPS: No R-Hash1 received");
 560                 return -1;
 561         }
 562
 563         os_memcpy(wps->peer_hash1, r_hash1, WPS_HASH_LEN);
 564         wpa_hexdump(MSG_DEBUG, "WPS: R-Hash1", wps->peer_hash1, WPS_HASH_LEN);
 565
 566         return 0;
 567 }
 568
 569
 570 static int wps_process_r_hash2(struct wps_data *wps, const u8 *r_hash2)
 571 {
 572         if (r_hash2 == NULL) {
 573                 wpa_printf(MSG_DEBUG, "WPS: No R-Hash2 received");
 574                 return -1;
 575         }
 576
 577         os_memcpy(wps->peer_hash2, r_hash2, WPS_HASH_LEN);
 578         wpa_hexdump(MSG_DEBUG, "WPS: R-Hash2", wps->peer_hash2, WPS_HASH_LEN);
 579
 580         return 0;
 581 }
 582
 583
 584 static int wps_process_r_snonce1(struct wps_data *wps, const u8 *r_snonce1)
 585 {
 586         u8 hash[SHA256_MAC_LEN];
 587         const u8 *addr[4];
 588         size_t len[4];
 589
 590         if (r_snonce1 == NULL) {
 591                 wpa_printf(MSG_DEBUG, "WPS: No R-SNonce1 received");
 592                 return -1;
 593         }
 594
 595         wpa_hexdump_key(MSG_DEBUG, "WPS: R-SNonce1", r_snonce1,
 596                         WPS_SECRET_NONCE_LEN);
 597
 598         /* R-Hash1 = HMAC_AuthKey(R-S1 || PSK1 || PK_E || PK_R) */
 599         addr[0] = r_snonce1;
 600         len[0] = WPS_SECRET_NONCE_LEN;
 601         addr[1] = wps->psk1;
 602         len[1] = WPS_PSK_LEN;
 603         addr[2] = wpabuf_head(wps->dh_pubkey_e);
 604         len[2] = wpabuf_len(wps->dh_pubkey_e);
 605         addr[3] = wpabuf_head(wps->dh_pubkey_r);
 606         len[3] = wpabuf_len(wps->dh_pubkey_r);
 607         hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
 608
 609         if (os_memcmp(wps->peer_hash1, hash, WPS_HASH_LEN) != 0) {
 610                 wpa_printf(MSG_DEBUG, "WPS: R-Hash1 derived from R-S1 does "
 611                            "not match with the pre-committed value");
 612                 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE;
 613                 wps_pwd_auth_fail_event(wps->wps, 1, 1);
 614                 return -1;
 615         }
 616
 617         wpa_printf(MSG_DEBUG, "WPS: Registrar proved knowledge of the first "
 618                    "half of the device password");
 619
 620         return 0;
 621 }
 622
 623
 624 static int wps_process_r_snonce2(struct wps_data *wps, const u8 *r_snonce2)
 625 {
 626         u8 hash[SHA256_MAC_LEN];
 627         const u8 *addr[4];
 628         size_t len[4];
 629
 630         if (r_snonce2 == NULL) {
 631                 wpa_printf(MSG_DEBUG, "WPS: No R-SNonce2 received");
 632                 return -1;
 633         }
 634
 635         wpa_hexdump_key(MSG_DEBUG, "WPS: R-SNonce2", r_snonce2,
 636                         WPS_SECRET_NONCE_LEN);
 637
 638         /* R-Hash2 = HMAC_AuthKey(R-S2 || PSK2 || PK_E || PK_R) */
 639         addr[0] = r_snonce2;
 640         len[0] = WPS_SECRET_NONCE_LEN;
 641         addr[1] = wps->psk2;
 642         len[1] = WPS_PSK_LEN;
 643         addr[2] = wpabuf_head(wps->dh_pubkey_e);
 644         len[2] = wpabuf_len(wps->dh_pubkey_e);
 645         addr[3] = wpabuf_head(wps->dh_pubkey_r);
 646         len[3] = wpabuf_len(wps->dh_pubkey_r);
 647         hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
 648
 649         if (os_memcmp(wps->peer_hash2, hash, WPS_HASH_LEN) != 0) {
 650                 wpa_printf(MSG_DEBUG, "WPS: R-Hash2 derived from R-S2 does "
 651                            "not match with the pre-committed value");
 652                 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE;
 653                 wps_pwd_auth_fail_event(wps->wps, 1, 2);
 654                 return -1;
 655         }
 656
 657         wpa_printf(MSG_DEBUG, "WPS: Registrar proved knowledge of the second "
 658                    "half of the device password");
 659
 660         return 0;
 661 }
 662
 663
 664 static int wps_process_cred_e(struct wps_data *wps, const u8 *cred,
 665                               size_t cred_len)
 666 {
 667         struct wps_parse_attr attr;
 668         struct wpabuf msg;
 669
 670         wpa_printf(MSG_DEBUG, "WPS: Received Credential");
 671         os_memset(&wps->cred, 0, sizeof(wps->cred));
 672         wpabuf_set(&msg, cred, cred_len);
 673         if (wps_parse_msg(&msg, &attr) < 0 ||
 674             wps_process_cred(&attr, &wps->cred))
 675                 return -1;
 676
 677         if (wps->wps->cred_cb) {
 678                 wps->cred.cred_attr = cred - 4;
 679                 wps->cred.cred_attr_len = cred_len + 4;
 680                 wps->wps->cred_cb(wps->wps->cb_ctx, &wps->cred);
 681                 wps->cred.cred_attr = NULL;
 682                 wps->cred.cred_attr_len = 0;
 683         }
 684
 685         return 0;
 686 }
 687
 688
 689 static int wps_process_creds(struct wps_data *wps, const u8 *cred[],
 690                              size_t cred_len[], size_t num_cred)
 691 {
 692         size_t i;
 693
 694         if (wps->wps->ap)
 695                 return 0;
 696
 697         if (num_cred == 0) {
 698                 wpa_printf(MSG_DEBUG, "WPS: No Credential attributes "
 699                            "received");
 700                 return -1;
 701         }
 702
 703         for (i = 0; i < num_cred; i++) {
 704                 if (wps_process_cred_e(wps, cred[i], cred_len[i]))
 705                         return -1;
 706         }
 707
 708         return 0;
 709 }
 710
 711
 712 static int wps_process_ap_settings_e(struct wps_data *wps,
 713                                      struct wps_parse_attr *attr,
 714                                      struct wpabuf *attrs)
 715 {
 716         struct wps_credential cred;
 717
 718         if (!wps->wps->ap)
 719                 return 0;
 720
 721         if (wps_process_ap_settings(attr, &cred) < 0)
 722                 return -1;
 723
 724         wpa_printf(MSG_INFO, "WPS: Received new AP configuration from "
 725                    "Registrar");
 726
 727         if (wps->wps->cred_cb) {
 728                 cred.cred_attr = wpabuf_head(attrs);
 729                 cred.cred_attr_len = wpabuf_len(attrs);
 730                 wps->wps->cred_cb(wps->wps->cb_ctx, &cred);
 731         }
 732
 733         return 0;
 734 }
 735
 736
 737 static enum wps_process_res wps_process_m2(struct wps_data *wps,
 738                                            const struct wpabuf *msg,
 739                                            struct wps_parse_attr *attr)
 740 {
 741         wpa_printf(MSG_DEBUG, "WPS: Received M2");
 742
 743         if (wps->state != RECV_M2) {
 744                 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
 745                            "receiving M2", wps->state);
 746                 wps->state = SEND_WSC_NACK;
 747                 return WPS_CONTINUE;
 748         }
 749
 750         if (wps_process_registrar_nonce(wps, attr->registrar_nonce) ||
 751             wps_process_enrollee_nonce(wps, attr->enrollee_nonce) ||
 752             wps_process_uuid_r(wps, attr->uuid_r) ||
 753             wps_process_pubkey(wps, attr->public_key, attr->public_key_len) ||
 754             wps_process_authenticator(wps, attr->authenticator, msg)) {
 755                 wps->state = SEND_WSC_NACK;
 756                 return WPS_CONTINUE;
 757         }
 758
 759         if (wps->wps->ap && wps->wps->ap_setup_locked) {
 760                 wpa_printf(MSG_DEBUG, "WPS: AP Setup is locked - refuse "
 761                            "registration of a new Registrar");
 762                 wps->config_error = WPS_CFG_SETUP_LOCKED;
 763                 wps->state = SEND_WSC_NACK;
 764                 return WPS_CONTINUE;
 765         }
 766
 767         wps->state = SEND_M3;
 768         return WPS_CONTINUE;
 769 }
 770
 771
 772 static enum wps_process_res wps_process_m2d(struct wps_data *wps,
 773                                             struct wps_parse_attr *attr)
 774 {
 775         wpa_printf(MSG_DEBUG, "WPS: Received M2D");
 776
 777         if (wps->state != RECV_M2) {
 778                 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
 779                            "receiving M2D", wps->state);
 780                 wps->state = SEND_WSC_NACK;
 781                 return WPS_CONTINUE;
 782         }
 783
 784         wpa_hexdump_ascii(MSG_DEBUG, "WPS: Manufacturer",
 785                           attr->manufacturer, attr->manufacturer_len);
 786         wpa_hexdump_ascii(MSG_DEBUG, "WPS: Model Name",
 787                           attr->model_name, attr->model_name_len);
 788         wpa_hexdump_ascii(MSG_DEBUG, "WPS: Model Number",
 789                           attr->model_number, attr->model_number_len);
 790         wpa_hexdump_ascii(MSG_DEBUG, "WPS: Serial Number",
 791                           attr->serial_number, attr->serial_number_len);
 792         wpa_hexdump_ascii(MSG_DEBUG, "WPS: Device Name",
 793                           attr->dev_name, attr->dev_name_len);
 794
 795         if (wps->wps->event_cb) {
 796                 union wps_event_data data;
 797                 struct wps_event_m2d *m2d = &data.m2d;
 798                 os_memset(&data, 0, sizeof(data));
 799                 if (attr->config_methods)
 800                         m2d->config_methods =
 801                                 WPA_GET_BE16(attr->config_methods);
 802                 m2d->manufacturer = attr->manufacturer;
 803                 m2d->manufacturer_len = attr->manufacturer_len;
 804                 m2d->model_name = attr->model_name;
 805                 m2d->model_name_len = attr->model_name_len;
 806                 m2d->model_number = attr->model_number;
 807                 m2d->model_number_len = attr->model_number_len;
 808                 m2d->serial_number = attr->serial_number;
 809                 m2d->serial_number_len = attr->serial_number_len;
 810                 m2d->dev_name = attr->dev_name;
 811                 m2d->dev_name_len = attr->dev_name_len;
 812                 m2d->primary_dev_type = attr->primary_dev_type;
 813                 if (attr->config_error)
 814                         m2d->config_error =
 815                                 WPA_GET_BE16(attr->config_error);
 816                 if (attr->dev_password_id)
 817                         m2d->dev_password_id =
 818                                 WPA_GET_BE16(attr->dev_password_id);
 819                 wps->wps->event_cb(wps->wps->cb_ctx, WPS_EV_M2D, &data);
 820         }
 821
 822         wps->state = RECEIVED_M2D;
 823         return WPS_CONTINUE;
 824 }
 825
 826
 827 static enum wps_process_res wps_process_m4(struct wps_data *wps,
 828                                            const struct wpabuf *msg,
 829                                            struct wps_parse_attr *attr)
 830 {
 831         struct wpabuf *decrypted;
 832         struct wps_parse_attr eattr;
 833
 834         wpa_printf(MSG_DEBUG, "WPS: Received M4");
 835
 836         if (wps->state != RECV_M4) {
 837                 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
 838                            "receiving M4", wps->state);
 839                 wps->state = SEND_WSC_NACK;
 840                 return WPS_CONTINUE;
 841         }
 842
 843         if (wps_process_enrollee_nonce(wps, attr->enrollee_nonce) ||
 844             wps_process_authenticator(wps, attr->authenticator, msg) ||
 845             wps_process_r_hash1(wps, attr->r_hash1) ||
 846             wps_process_r_hash2(wps, attr->r_hash2)) {
 847                 wps->state = SEND_WSC_NACK;
 848                 return WPS_CONTINUE;
 849         }
 850
 851         decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings,
 852                                               attr->encr_settings_len);
 853         if (decrypted == NULL) {
 854                 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypted Encrypted "
 855                            "Settings attribute");
 856                 wps->state = SEND_WSC_NACK;
 857                 return WPS_CONTINUE;
 858         }
 859
 860         wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings "
 861                    "attribute");
 862         if (wps_parse_msg(decrypted, &eattr) < 0 ||
 863             wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) ||
 864             wps_process_r_snonce1(wps, eattr.r_snonce1)) {
 865                 wpabuf_free(decrypted);
 866                 wps->state = SEND_WSC_NACK;
 867                 return WPS_CONTINUE;
 868         }
 869         wpabuf_free(decrypted);
 870
 871         wps->state = SEND_M5;
 872         return WPS_CONTINUE;
 873 }
 874
 875
 876 static enum wps_process_res wps_process_m6(struct wps_data *wps,
 877                                            const struct wpabuf *msg,
 878                                            struct wps_parse_attr *attr)
 879 {
 880         struct wpabuf *decrypted;
 881         struct wps_parse_attr eattr;
 882
 883         wpa_printf(MSG_DEBUG, "WPS: Received M6");
 884
 885         if (wps->state != RECV_M6) {
 886                 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
 887                            "receiving M6", wps->state);
 888                 wps->state = SEND_WSC_NACK;
 889                 return WPS_CONTINUE;
 890         }
 891
 892         if (wps_process_enrollee_nonce(wps, attr->enrollee_nonce) ||
 893             wps_process_authenticator(wps, attr->authenticator, msg)) {
 894                 wps->state = SEND_WSC_NACK;
 895                 return WPS_CONTINUE;
 896         }
 897
 898         decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings,
 899                                               attr->encr_settings_len);
 900         if (decrypted == NULL) {
 901                 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypted Encrypted "
 902                            "Settings attribute");
 903                 wps->state = SEND_WSC_NACK;
 904                 return WPS_CONTINUE;
 905         }
 906
 907         wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings "
 908                    "attribute");
 909         if (wps_parse_msg(decrypted, &eattr) < 0 ||
 910             wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) ||
 911             wps_process_r_snonce2(wps, eattr.r_snonce2)) {
 912                 wpabuf_free(decrypted);
 913                 wps->state = SEND_WSC_NACK;
 914                 return WPS_CONTINUE;
 915         }
 916         wpabuf_free(decrypted);
 917
 918         wps->state = SEND_M7;
 919         return WPS_CONTINUE;
 920 }
 921
 922
 923 static enum wps_process_res wps_process_m8(struct wps_data *wps,
 924                                            const struct wpabuf *msg,
 925                                            struct wps_parse_attr *attr)
 926 {
 927         struct wpabuf *decrypted;
 928         struct wps_parse_attr eattr;
 929
 930         wpa_printf(MSG_DEBUG, "WPS: Received M8");
 931
 932         if (wps->state != RECV_M8) {
 933                 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
 934                            "receiving M8", wps->state);
 935                 wps->state = SEND_WSC_NACK;
 936                 return WPS_CONTINUE;
 937         }
 938
 939         if (wps_process_enrollee_nonce(wps, attr->enrollee_nonce) ||
 940             wps_process_authenticator(wps, attr->authenticator, msg)) {
 941                 wps->state = SEND_WSC_NACK;
 942                 return WPS_CONTINUE;
 943         }
 944
 945         decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings,
 946                                               attr->encr_settings_len);
 947         if (decrypted == NULL) {
 948                 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypted Encrypted "
 949                            "Settings attribute");
 950                 wps->state = SEND_WSC_NACK;
 951                 return WPS_CONTINUE;
 952         }
 953
 954         wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings "
 955                    "attribute");
 956         if (wps_parse_msg(decrypted, &eattr) < 0 ||
 957             wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) ||
 958             wps_process_creds(wps, eattr.cred, eattr.cred_len,
 959                               eattr.num_cred) ||
 960             wps_process_ap_settings_e(wps, &eattr, decrypted)) {
 961                 wpabuf_free(decrypted);
 962                 wps->state = SEND_WSC_NACK;
 963                 return WPS_CONTINUE;
 964         }
 965         wpabuf_free(decrypted);
 966
 967         wps->state = WPS_MSG_DONE;
 968         return WPS_CONTINUE;
 969 }
 970
 971
 972 static enum wps_process_res wps_process_wsc_msg(struct wps_data *wps,
 973                                                 const struct wpabuf *msg)
 974 {
 975         struct wps_parse_attr attr;
 976         enum wps_process_res ret = WPS_CONTINUE;
 977
 978         wpa_printf(MSG_DEBUG, "WPS: Received WSC_MSG");
 979
 980         if (wps_parse_msg(msg, &attr) < 0)
 981                 return WPS_FAILURE;
 982
 983         if (!wps_version_supported(attr.version)) {
 984                 wpa_printf(MSG_DEBUG, "WPS: Unsupported message version 0x%x",
 985                            attr.version ? *attr.version : 0);
 986                 return WPS_FAILURE;
 987         }
 988
 989         if (attr.enrollee_nonce == NULL ||
 990             os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN != 0)) {
 991                 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
 992                 return WPS_FAILURE;
 993         }
 994
 995         if (attr.msg_type == NULL) {
 996                 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
 997                 return WPS_FAILURE;
 998         }
 999
1000         switch (*attr.msg_type) {
1001         case WPS_M2:
1002                 ret = wps_process_m2(wps, msg, &attr);
1003                 break;
1004         case WPS_M2D:
1005                 ret = wps_process_m2d(wps, &attr);
1006                 break;
1007         case WPS_M4:
1008                 ret = wps_process_m4(wps, msg, &attr);
1009                 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
1010                         wps_fail_event(wps->wps, WPS_M4);
1011                 break;
1012         case WPS_M6:
1013                 ret = wps_process_m6(wps, msg, &attr);
1014                 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
1015                         wps_fail_event(wps->wps, WPS_M6);
1016                 break;
1017         case WPS_M8:
1018                 ret = wps_process_m8(wps, msg, &attr);
1019                 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
1020                         wps_fail_event(wps->wps, WPS_M8);
1021                 break;
1022         default:
1023                 wpa_printf(MSG_DEBUG, "WPS: Unsupported Message Type %d",
1024                            *attr.msg_type);
1025                 return WPS_FAILURE;
1026         }
1027
1028         /*
1029          * Save a copy of the last message for Authenticator derivation if we
1030          * are continuing. However, skip M2D since it is not authenticated and
1031          * neither is the ACK/NACK response frame. This allows the possibly
1032          * following M2 to be processed correctly by using the previously sent
1033          * M1 in Authenticator derivation.
1034          */
1035         if (ret == WPS_CONTINUE && *attr.msg_type != WPS_M2D) {
1036                 /* Save a copy of the last message for Authenticator derivation
1037                  */
1038                 wpabuf_free(wps->last_msg);
1039                 wps->last_msg = wpabuf_dup(msg);
1040         }
1041
1042         return ret;
1043 }
1044
1045
1046 static enum wps_process_res wps_process_wsc_ack(struct wps_data *wps,
1047                                                 const struct wpabuf *msg)
1048 {
1049         struct wps_parse_attr attr;
1050
1051         wpa_printf(MSG_DEBUG, "WPS: Received WSC_ACK");
1052
1053         if (wps_parse_msg(msg, &attr) < 0)
1054                 return WPS_FAILURE;
1055
1056         if (!wps_version_supported(attr.version)) {
1057                 wpa_printf(MSG_DEBUG, "WPS: Unsupported message version 0x%x",
1058                            attr.version ? *attr.version : 0);
1059                 return WPS_FAILURE;
1060         }
1061
1062         if (attr.msg_type == NULL) {
1063                 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
1064                 return WPS_FAILURE;
1065         }
1066
1067         if (*attr.msg_type != WPS_WSC_ACK) {
1068                 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
1069                            *attr.msg_type);
1070                 return WPS_FAILURE;
1071         }
1072
1073         if (attr.registrar_nonce == NULL ||
1074             os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN != 0))
1075         {
1076                 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
1077                 return WPS_FAILURE;
1078         }
1079
1080         if (attr.enrollee_nonce == NULL ||
1081             os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN != 0)) {
1082                 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
1083                 return WPS_FAILURE;
1084         }
1085
1086         if (wps->state == RECV_ACK && wps->wps->ap) {
1087                 wpa_printf(MSG_DEBUG, "WPS: External Registrar registration "
1088                            "completed successfully");
1089                 wps_success_event(wps->wps);
1090                 wps->state = WPS_FINISHED;
1091                 return WPS_DONE;
1092         }
1093
1094         return WPS_FAILURE;
1095 }
1096
1097
1098 static enum wps_process_res wps_process_wsc_nack(struct wps_data *wps,
1099                                                  const struct wpabuf *msg)
1100 {
1101         struct wps_parse_attr attr;
1102
1103         wpa_printf(MSG_DEBUG, "WPS: Received WSC_NACK");
1104
1105         if (wps_parse_msg(msg, &attr) < 0)
1106                 return WPS_FAILURE;
1107
1108         if (!wps_version_supported(attr.version)) {
1109                 wpa_printf(MSG_DEBUG, "WPS: Unsupported message version 0x%x",
1110                            attr.version ? *attr.version : 0);
1111                 return WPS_FAILURE;
1112         }
1113
1114         if (attr.msg_type == NULL) {
1115                 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
1116                 return WPS_FAILURE;
1117         }
1118
1119         if (*attr.msg_type != WPS_WSC_NACK) {
1120                 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
1121                            *attr.msg_type);
1122                 return WPS_FAILURE;
1123         }
1124
1125         if (attr.registrar_nonce == NULL ||
1126             os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN != 0))
1127         {
1128                 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
1129                 wpa_hexdump(MSG_DEBUG, "WPS: Received Registrar Nonce",
1130                             attr.registrar_nonce, WPS_NONCE_LEN);
1131                 wpa_hexdump(MSG_DEBUG, "WPS: Expected Registrar Nonce",
1132                             wps->nonce_r, WPS_NONCE_LEN);
1133                 return WPS_FAILURE;
1134         }
1135
1136         if (attr.enrollee_nonce == NULL ||
1137             os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN != 0)) {
1138                 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
1139                 wpa_hexdump(MSG_DEBUG, "WPS: Received Enrollee Nonce",
1140                             attr.enrollee_nonce, WPS_NONCE_LEN);
1141                 wpa_hexdump(MSG_DEBUG, "WPS: Expected Enrollee Nonce",
1142                             wps->nonce_e, WPS_NONCE_LEN);
1143                 return WPS_FAILURE;
1144         }
1145
1146         if (attr.config_error == NULL) {
1147                 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error attribute "
1148                            "in WSC_NACK");
1149                 return WPS_FAILURE;
1150         }
1151
1152         wpa_printf(MSG_DEBUG, "WPS: Registrar terminated negotiation with "
1153                    "Configuration Error %d", WPA_GET_BE16(attr.config_error));
1154
1155         switch (wps->state) {
1156         case RECV_M4:
1157                 wps_fail_event(wps->wps, WPS_M3);
1158                 break;
1159         case RECV_M6:
1160                 wps_fail_event(wps->wps, WPS_M5);
1161                 break;
1162         case RECV_M8:
1163                 wps_fail_event(wps->wps, WPS_M7);
1164                 break;
1165         default:
1166                 break;
1167         }
1168
1169         /* Followed by NACK if Enrollee is Supplicant or EAP-Failure if
1170          * Enrollee is Authenticator */
1171         wps->state = SEND_WSC_NACK;
1172
1173         return WPS_FAILURE;
1174 }
1175
1176
1177 enum wps_process_res wps_enrollee_process_msg(struct wps_data *wps,
1178                                               enum wsc_op_code op_code,
1179                                               const struct wpabuf *msg)
1180 {
1181
1182         wpa_printf(MSG_DEBUG, "WPS: Processing received message (len=%lu "
1183                    "op_code=%d)",
1184                    (unsigned long) wpabuf_len(msg), op_code);
1185
1186         switch (op_code) {
1187         case WSC_MSG:
1188         case WSC_UPnP:
1189                 return wps_process_wsc_msg(wps, msg);
1190         case WSC_ACK:
1191                 return wps_process_wsc_ack(wps, msg);
1192         case WSC_NACK:
1193                 return wps_process_wsc_nack(wps, msg);
1194         default:
1195                 wpa_printf(MSG_DEBUG, "WPS: Unsupported op_code %d", op_code);
1196                 return WPS_FAILURE;
1197         }
1198 }