wpa_supplicant/config_file.c

   1 /*
   2  * WPA Supplicant / Configuration backend: text file
   3  * Copyright (c) 2003-2012, 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  * This file implements a configuration backend for text files. All the
   9  * configuration information is stored in a text file that uses a format
  10  * described in the sample configuration file, wpa_supplicant.conf.
  11  */
  12
  13 #include "includes.h"
  14
  15 #include "common.h"
  16 #include "config.h"
  17 #include "base64.h"
  18 #include "uuid.h"
  19 #include "p2p/p2p.h"
  20
  21
  22 static int newline_terminated(const char *buf, size_t buflen)
  23 {
  24         size_t len = os_strlen(buf);
  25         if (len == 0)
  26                 return 0;
  27         if (len == buflen - 1 && buf[buflen - 1] != '\r' &&
  28             buf[len - 1] != '\n')
  29                 return 0;
  30         return 1;
  31 }
  32
  33
  34 static void skip_line_end(FILE *stream)
  35 {
  36         char buf[100];
  37         while (fgets(buf, sizeof(buf), stream)) {
  38                 buf[sizeof(buf) - 1] = '\0';
  39                 if (newline_terminated(buf, sizeof(buf)))
  40                         return;
  41         }
  42 }
  43
  44
  45 /**
  46  * wpa_config_get_line - Read the next configuration file line
  47  * @s: Buffer for the line
  48  * @size: The buffer length
  49  * @stream: File stream to read from
  50  * @line: Pointer to a variable storing the file line number
  51  * @_pos: Buffer for the pointer to the beginning of data on the text line or
  52  * %NULL if not needed (returned value used instead)
  53  * Returns: Pointer to the beginning of data on the text line or %NULL if no
  54  * more text lines are available.
  55  *
  56  * This function reads the next non-empty line from the configuration file and
  57  * removes comments. The returned string is guaranteed to be null-terminated.
  58  */
  59 static char * wpa_config_get_line(char *s, int size, FILE *stream, int *line,
  60                                   char **_pos)
  61 {
  62         char *pos, *end, *sstart;
  63
  64         while (fgets(s, size, stream)) {
  65                 (*line)++;
  66                 s[size - 1] = '\0';
  67                 if (!newline_terminated(s, size)) {
  68                         /*
  69                          * The line was truncated - skip rest of it to avoid
  70                          * confusing error messages.
  71                          */
  72                         wpa_printf(MSG_INFO, "Long line in configuration file "
  73                                    "truncated");
  74                         skip_line_end(stream);
  75                 }
  76                 pos = s;
  77
  78                 /* Skip white space from the beginning of line. */
  79                 while (*pos == ' ' || *pos == '\t' || *pos == '\r')
  80                         pos++;
  81
  82                 /* Skip comment lines and empty lines */
  83                 if (*pos == '#' || *pos == '\n' || *pos == '\0')
  84                         continue;
  85
  86                 /*
  87                  * Remove # comments unless they are within a double quoted
  88                  * string.
  89                  */
  90                 sstart = os_strchr(pos, '"');
  91                 if (sstart)
  92                         sstart = os_strrchr(sstart + 1, '"');
  93                 if (!sstart)
  94                         sstart = pos;
  95                 end = os_strchr(sstart, '#');
  96                 if (end)
  97                         *end-- = '\0';
  98                 else
  99                         end = pos + os_strlen(pos) - 1;
 100
 101                 /* Remove trailing white space. */
 102                 while (end > pos &&
 103                        (*end == '\n' || *end == ' ' || *end == '\t' ||
 104                         *end == '\r'))
 105                         *end-- = '\0';
 106
 107                 if (*pos == '\0')
 108                         continue;
 109
 110                 if (_pos)
 111                         *_pos = pos;
 112                 return pos;
 113         }
 114
 115         if (_pos)
 116                 *_pos = NULL;
 117         return NULL;
 118 }
 119
 120
 121 static int wpa_config_validate_network(struct wpa_ssid *ssid, int line)
 122 {
 123         int errors = 0;
 124
 125         if (ssid->passphrase) {
 126                 if (ssid->psk_set) {
 127                         wpa_printf(MSG_ERROR, "Line %d: both PSK and "
 128                                    "passphrase configured.", line);
 129                         errors++;
 130                 }
 131                 wpa_config_update_psk(ssid);
 132         }
 133
 134         if ((ssid->group_cipher & WPA_CIPHER_CCMP) &&
 135             !(ssid->pairwise_cipher & WPA_CIPHER_CCMP) &&
 136             !(ssid->pairwise_cipher & WPA_CIPHER_NONE)) {
 137                 /* Group cipher cannot be stronger than the pairwise cipher. */
 138                 wpa_printf(MSG_DEBUG, "Line %d: removed CCMP from group cipher"
 139                            " list since it was not allowed for pairwise "
 140                            "cipher", line);
 141                 ssid->group_cipher &= ~WPA_CIPHER_CCMP;
 142         }
 143
 144         return errors;
 145 }
 146
 147
 148 static struct wpa_ssid * wpa_config_read_network(FILE *f, int *line, int id)
 149 {
 150         struct wpa_ssid *ssid;
 151         int errors = 0, end = 0;
 152         char buf[2000], *pos, *pos2;
 153
 154         wpa_printf(MSG_MSGDUMP, "Line: %d - start of a new network block",
 155                    *line);
 156         ssid = os_zalloc(sizeof(*ssid));
 157         if (ssid == NULL)
 158                 return NULL;
 159         ssid->id = id;
 160
 161         wpa_config_set_network_defaults(ssid);
 162
 163         while (wpa_config_get_line(buf, sizeof(buf), f, line, &pos)) {
 164                 if (os_strcmp(pos, "}") == 0) {
 165                         end = 1;
 166                         break;
 167                 }
 168
 169                 pos2 = os_strchr(pos, '=');
 170                 if (pos2 == NULL) {
 171                         wpa_printf(MSG_ERROR, "Line %d: Invalid SSID line "
 172                                    "'%s'.", *line, pos);
 173                         errors++;
 174                         continue;
 175                 }
 176
 177                 *pos2++ = '\0';
 178                 if (*pos2 == '"') {
 179                         if (os_strchr(pos2 + 1, '"') == NULL) {
 180                                 wpa_printf(MSG_ERROR, "Line %d: invalid "
 181                                            "quotation '%s'.", *line, pos2);
 182                                 errors++;
 183                                 continue;
 184                         }
 185                 }
 186
 187                 if (wpa_config_set(ssid, pos, pos2, *line) < 0)
 188                         errors++;
 189         }
 190
 191         if (!end) {
 192                 wpa_printf(MSG_ERROR, "Line %d: network block was not "
 193                            "terminated properly.", *line);
 194                 errors++;
 195         }
 196
 197         errors += wpa_config_validate_network(ssid, *line);
 198
 199         if (errors) {
 200                 wpa_config_free_ssid(ssid);
 201                 ssid = NULL;
 202         }
 203
 204         return ssid;
 205 }
 206
 207
 208 static struct wpa_cred * wpa_config_read_cred(FILE *f, int *line, int id)
 209 {
 210         struct wpa_cred *cred;
 211         int errors = 0, end = 0;
 212         char buf[256], *pos, *pos2;
 213
 214         wpa_printf(MSG_MSGDUMP, "Line: %d - start of a new cred block", *line);
 215         cred = os_zalloc(sizeof(*cred));
 216         if (cred == NULL)
 217                 return NULL;
 218         cred->id = id;
 219
 220         while (wpa_config_get_line(buf, sizeof(buf), f, line, &pos)) {
 221                 if (os_strcmp(pos, "}") == 0) {
 222                         end = 1;
 223                         break;
 224                 }
 225
 226                 pos2 = os_strchr(pos, '=');
 227                 if (pos2 == NULL) {
 228                         wpa_printf(MSG_ERROR, "Line %d: Invalid cred line "
 229                                    "'%s'.", *line, pos);
 230                         errors++;
 231                         continue;
 232                 }
 233
 234                 *pos2++ = '\0';
 235                 if (*pos2 == '"') {
 236                         if (os_strchr(pos2 + 1, '"') == NULL) {
 237                                 wpa_printf(MSG_ERROR, "Line %d: invalid "
 238                                            "quotation '%s'.", *line, pos2);
 239                                 errors++;
 240                                 continue;
 241                         }
 242                 }
 243
 244                 if (wpa_config_set_cred(cred, pos, pos2, *line) < 0)
 245                         errors++;
 246         }
 247
 248         if (!end) {
 249                 wpa_printf(MSG_ERROR, "Line %d: cred block was not "
 250                            "terminated properly.", *line);
 251                 errors++;
 252         }
 253
 254         if (errors) {
 255                 wpa_config_free_cred(cred);
 256                 cred = NULL;
 257         }
 258
 259         return cred;
 260 }
 261
 262
 263 #ifndef CONFIG_NO_CONFIG_BLOBS
 264 static struct wpa_config_blob * wpa_config_read_blob(FILE *f, int *line,
 265                                                      const char *name)
 266 {
 267         struct wpa_config_blob *blob;
 268         char buf[256], *pos;
 269         unsigned char *encoded = NULL, *nencoded;
 270         int end = 0;
 271         size_t encoded_len = 0, len;
 272
 273         wpa_printf(MSG_MSGDUMP, "Line: %d - start of a new named blob '%s'",
 274                    *line, name);
 275
 276         while (wpa_config_get_line(buf, sizeof(buf), f, line, &pos)) {
 277                 if (os_strcmp(pos, "}") == 0) {
 278                         end = 1;
 279                         break;
 280                 }
 281
 282                 len = os_strlen(pos);
 283                 nencoded = os_realloc(encoded, encoded_len + len);
 284                 if (nencoded == NULL) {
 285                         wpa_printf(MSG_ERROR, "Line %d: not enough memory for "
 286                                    "blob", *line);
 287                         os_free(encoded);
 288                         return NULL;
 289                 }
 290                 encoded = nencoded;
 291                 os_memcpy(encoded + encoded_len, pos, len);
 292                 encoded_len += len;
 293         }
 294
 295         if (!end) {
 296                 wpa_printf(MSG_ERROR, "Line %d: blob was not terminated "
 297                            "properly", *line);
 298                 os_free(encoded);
 299                 return NULL;
 300         }
 301
 302         blob = os_zalloc(sizeof(*blob));
 303         if (blob == NULL) {
 304                 os_free(encoded);
 305                 return NULL;
 306         }
 307         blob->name = os_strdup(name);
 308         blob->data = base64_decode(encoded, encoded_len, &blob->len);
 309         os_free(encoded);
 310
 311         if (blob->name == NULL || blob->data == NULL) {
 312                 wpa_config_free_blob(blob);
 313                 return NULL;
 314         }
 315
 316         return blob;
 317 }
 318
 319
 320 static int wpa_config_process_blob(struct wpa_config *config, FILE *f,
 321                                    int *line, char *bname)
 322 {
 323         char *name_end;
 324         struct wpa_config_blob *blob;
 325
 326         name_end = os_strchr(bname, '=');
 327         if (name_end == NULL) {
 328                 wpa_printf(MSG_ERROR, "Line %d: no blob name terminator",
 329                            *line);
 330                 return -1;
 331         }
 332         *name_end = '\0';
 333
 334         blob = wpa_config_read_blob(f, line, bname);
 335         if (blob == NULL) {
 336                 wpa_printf(MSG_ERROR, "Line %d: failed to read blob %s",
 337                            *line, bname);
 338                 return -1;
 339         }
 340         wpa_config_set_blob(config, blob);
 341         return 0;
 342 }
 343 #endif /* CONFIG_NO_CONFIG_BLOBS */
 344
 345
 346 struct wpa_config * wpa_config_read(const char *name)
 347 {
 348         FILE *f;
 349         char buf[512], *pos;
 350         int errors = 0, line = 0;
 351         struct wpa_ssid *ssid, *tail = NULL, *head = NULL;
 352         struct wpa_cred *cred, *cred_tail = NULL, *cred_head = NULL;
 353         struct wpa_config *config;
 354         int id = 0;
 355         int cred_id = 0;
 356
 357         config = wpa_config_alloc_empty(NULL, NULL);
 358         if (config == NULL) {
 359                 wpa_printf(MSG_ERROR, "Failed to allocate config file "
 360                            "structure");
 361                 return NULL;
 362         }
 363
 364         wpa_printf(MSG_DEBUG, "Reading configuration file '%s'", name);
 365         f = fopen(name, "r");
 366         if (f == NULL) {
 367                 wpa_printf(MSG_ERROR, "Failed to open config file '%s', "
 368                            "error: %s", name, strerror(errno));
 369                 os_free(config);
 370                 return NULL;
 371         }
 372
 373         while (wpa_config_get_line(buf, sizeof(buf), f, &line, &pos)) {
 374                 if (os_strcmp(pos, "network={") == 0) {
 375                         ssid = wpa_config_read_network(f, &line, id++);
 376                         if (ssid == NULL) {
 377                                 wpa_printf(MSG_ERROR, "Line %d: failed to "
 378                                            "parse network block.", line);
 379                                 errors++;
 380                                 continue;
 381                         }
 382                         if (head == NULL) {
 383                                 head = tail = ssid;
 384                         } else {
 385                                 tail->next = ssid;
 386                                 tail = ssid;
 387                         }
 388                         if (wpa_config_add_prio_network(config, ssid)) {
 389                                 wpa_printf(MSG_ERROR, "Line %d: failed to add "
 390                                            "network block to priority list.",
 391                                            line);
 392                                 errors++;
 393                                 continue;
 394                         }
 395                 } else if (os_strcmp(pos, "cred={") == 0) {
 396                         cred = wpa_config_read_cred(f, &line, cred_id++);
 397                         if (cred == NULL) {
 398                                 wpa_printf(MSG_ERROR, "Line %d: failed to "
 399                                            "parse cred block.", line);
 400                                 errors++;
 401                                 continue;
 402                         }
 403                         if (cred_head == NULL) {
 404                                 cred_head = cred_tail = cred;
 405                         } else {
 406                                 cred_tail->next = cred;
 407                                 cred_tail = cred;
 408                         }
 409 #ifndef CONFIG_NO_CONFIG_BLOBS
 410                 } else if (os_strncmp(pos, "blob-base64-", 12) == 0) {
 411                         if (wpa_config_process_blob(config, f, &line, pos + 12)
 412                             < 0) {
 413                                 wpa_printf(MSG_ERROR, "Line %d: failed to "
 414                                            "process blob.", line);
 415                                 errors++;
 416                                 continue;
 417                         }
 418 #endif /* CONFIG_NO_CONFIG_BLOBS */
 419                 } else if (wpa_config_process_global(config, pos, line) < 0) {
 420                         wpa_printf(MSG_ERROR, "Line %d: Invalid configuration "
 421                                    "line '%s'.", line, pos);
 422                         errors++;
 423                         continue;
 424                 }
 425         }
 426
 427         fclose(f);
 428
 429         config->ssid = head;
 430         wpa_config_debug_dump_networks(config);
 431         config->cred = cred_head;
 432
 433 #ifndef WPA_IGNORE_CONFIG_ERRORS
 434         if (errors) {
 435                 wpa_config_free(config);
 436                 config = NULL;
 437                 head = NULL;
 438         }
 439 #endif /* WPA_IGNORE_CONFIG_ERRORS */
 440
 441         return config;
 442 }
 443
 444
 445 #ifndef CONFIG_NO_CONFIG_WRITE
 446
 447 static void write_str(FILE *f, const char *field, struct wpa_ssid *ssid)
 448 {
 449         char *value = wpa_config_get(ssid, field);
 450         if (value == NULL)
 451                 return;
 452         fprintf(f, "\t%s=%s\n", field, value);
 453         os_free(value);
 454 }
 455
 456
 457 static void write_int(FILE *f, const char *field, int value, int def)
 458 {
 459         if (value == def)
 460                 return;
 461         fprintf(f, "\t%s=%d\n", field, value);
 462 }
 463
 464
 465 static void write_bssid(FILE *f, struct wpa_ssid *ssid)
 466 {
 467         char *value = wpa_config_get(ssid, "bssid");
 468         if (value == NULL)
 469                 return;
 470         fprintf(f, "\tbssid=%s\n", value);
 471         os_free(value);
 472 }
 473
 474
 475 static void write_psk(FILE *f, struct wpa_ssid *ssid)
 476 {
 477         char *value = wpa_config_get(ssid, "psk");
 478         if (value == NULL)
 479                 return;
 480         fprintf(f, "\tpsk=%s\n", value);
 481         os_free(value);
 482 }
 483
 484
 485 static void write_proto(FILE *f, struct wpa_ssid *ssid)
 486 {
 487         char *value;
 488
 489         if (ssid->proto == DEFAULT_PROTO)
 490                 return;
 491
 492         value = wpa_config_get(ssid, "proto");
 493         if (value == NULL)
 494                 return;
 495         if (value[0])
 496                 fprintf(f, "\tproto=%s\n", value);
 497         os_free(value);
 498 }
 499
 500
 501 static void write_key_mgmt(FILE *f, struct wpa_ssid *ssid)
 502 {
 503         char *value;
 504
 505         if (ssid->key_mgmt == DEFAULT_KEY_MGMT)
 506                 return;
 507
 508         value = wpa_config_get(ssid, "key_mgmt");
 509         if (value == NULL)
 510                 return;
 511         if (value[0])
 512                 fprintf(f, "\tkey_mgmt=%s\n", value);
 513         os_free(value);
 514 }
 515
 516
 517 static void write_pairwise(FILE *f, struct wpa_ssid *ssid)
 518 {
 519         char *value;
 520
 521         if (ssid->pairwise_cipher == DEFAULT_PAIRWISE)
 522                 return;
 523
 524         value = wpa_config_get(ssid, "pairwise");
 525         if (value == NULL)
 526                 return;
 527         if (value[0])
 528                 fprintf(f, "\tpairwise=%s\n", value);
 529         os_free(value);
 530 }
 531
 532
 533 static void write_group(FILE *f, struct wpa_ssid *ssid)
 534 {
 535         char *value;
 536
 537         if (ssid->group_cipher == DEFAULT_GROUP)
 538                 return;
 539
 540         value = wpa_config_get(ssid, "group");
 541         if (value == NULL)
 542                 return;
 543         if (value[0])
 544                 fprintf(f, "\tgroup=%s\n", value);
 545         os_free(value);
 546 }
 547
 548
 549 static void write_auth_alg(FILE *f, struct wpa_ssid *ssid)
 550 {
 551         char *value;
 552
 553         if (ssid->auth_alg == 0)
 554                 return;
 555
 556         value = wpa_config_get(ssid, "auth_alg");
 557         if (value == NULL)
 558                 return;
 559         if (value[0])
 560                 fprintf(f, "\tauth_alg=%s\n", value);
 561         os_free(value);
 562 }
 563
 564
 565 #ifdef IEEE8021X_EAPOL
 566 static void write_eap(FILE *f, struct wpa_ssid *ssid)
 567 {
 568         char *value;
 569
 570         value = wpa_config_get(ssid, "eap");
 571         if (value == NULL)
 572                 return;
 573
 574         if (value[0])
 575                 fprintf(f, "\teap=%s\n", value);
 576         os_free(value);
 577 }
 578 #endif /* IEEE8021X_EAPOL */
 579
 580
 581 static void write_wep_key(FILE *f, int idx, struct wpa_ssid *ssid)
 582 {
 583         char field[20], *value;
 584         int res;
 585
 586         res = os_snprintf(field, sizeof(field), "wep_key%d", idx);
 587         if (res < 0 || (size_t) res >= sizeof(field))
 588                 return;
 589         value = wpa_config_get(ssid, field);
 590         if (value) {
 591                 fprintf(f, "\t%s=%s\n", field, value);
 592                 os_free(value);
 593         }
 594 }
 595
 596
 597 #ifdef CONFIG_P2P
 598 static void write_p2p_client_list(FILE *f, struct wpa_ssid *ssid)
 599 {
 600         char *value = wpa_config_get(ssid, "p2p_client_list");
 601         if (value == NULL)
 602                 return;
 603         fprintf(f, "\tp2p_client_list=%s\n", value);
 604         os_free(value);
 605 }
 606 #endif /* CONFIG_P2P */
 607
 608
 609 static void wpa_config_write_network(FILE *f, struct wpa_ssid *ssid)
 610 {
 611         int i;
 612
 613 #define STR(t) write_str(f, #t, ssid)
 614 #define INT(t) write_int(f, #t, ssid->t, 0)
 615 #define INTe(t) write_int(f, #t, ssid->eap.t, 0)
 616 #define INT_DEF(t, def) write_int(f, #t, ssid->t, def)
 617 #define INT_DEFe(t, def) write_int(f, #t, ssid->eap.t, def)
 618
 619         STR(ssid);
 620         INT(scan_ssid);
 621         write_bssid(f, ssid);
 622         write_psk(f, ssid);
 623         write_proto(f, ssid);
 624         write_key_mgmt(f, ssid);
 625         INT_DEF(bg_scan_period, DEFAULT_BG_SCAN_PERIOD);
 626         write_pairwise(f, ssid);
 627         write_group(f, ssid);
 628         write_auth_alg(f, ssid);
 629         STR(bgscan);
 630         STR(autoscan);
 631 #ifdef IEEE8021X_EAPOL
 632         write_eap(f, ssid);
 633         STR(identity);
 634         STR(anonymous_identity);
 635         STR(password);
 636         STR(ca_cert);
 637         STR(ca_path);
 638         STR(client_cert);
 639         STR(private_key);
 640         STR(private_key_passwd);
 641         STR(dh_file);
 642         STR(subject_match);
 643         STR(altsubject_match);
 644         STR(ca_cert2);
 645         STR(ca_path2);
 646         STR(client_cert2);
 647         STR(private_key2);
 648         STR(private_key2_passwd);
 649         STR(dh_file2);
 650         STR(subject_match2);
 651         STR(altsubject_match2);
 652         STR(phase1);
 653         STR(phase2);
 654         STR(pcsc);
 655         STR(pin);
 656         STR(engine_id);
 657         STR(key_id);
 658         STR(cert_id);
 659         STR(ca_cert_id);
 660         STR(key2_id);
 661         STR(pin2);
 662         STR(engine2_id);
 663         STR(cert2_id);
 664         STR(ca_cert2_id);
 665         INTe(engine);
 666         INTe(engine2);
 667         INT_DEF(eapol_flags, DEFAULT_EAPOL_FLAGS);
 668 #endif /* IEEE8021X_EAPOL */
 669         for (i = 0; i < 4; i++)
 670                 write_wep_key(f, i, ssid);
 671         INT(wep_tx_keyidx);
 672         INT(priority);
 673 #ifdef IEEE8021X_EAPOL
 674         INT_DEF(eap_workaround, DEFAULT_EAP_WORKAROUND);
 675         STR(pac_file);
 676         INT_DEFe(fragment_size, DEFAULT_FRAGMENT_SIZE);
 677 #endif /* IEEE8021X_EAPOL */
 678         INT(mode);
 679         write_int(f, "proactive_key_caching", ssid->proactive_key_caching, -1);
 680         INT(disabled);
 681         INT(peerkey);
 682 #ifdef CONFIG_IEEE80211W
 683         write_int(f, "ieee80211w", ssid->ieee80211w,
 684                   MGMT_FRAME_PROTECTION_DEFAULT);
 685 #endif /* CONFIG_IEEE80211W */
 686         STR(id_str);
 687 #ifdef CONFIG_P2P
 688         write_p2p_client_list(f, ssid);
 689 #endif /* CONFIG_P2P */
 690
 691 #undef STR
 692 #undef INT
 693 #undef INT_DEF
 694 }
 695
 696
 697 static void wpa_config_write_cred(FILE *f, struct wpa_cred *cred)
 698 {
 699         if (cred->priority)
 700                 fprintf(f, "\tpriority=%d\n", cred->priority);
 701         if (cred->pcsc)
 702                 fprintf(f, "\tpcsc=%d\n", cred->pcsc);
 703         if (cred->realm)
 704                 fprintf(f, "\trealm=\"%s\"\n", cred->realm);
 705         if (cred->username)
 706                 fprintf(f, "\tusername=\"%s\"\n", cred->username);
 707         if (cred->password)
 708                 fprintf(f, "\tpassword=\"%s\"\n", cred->password);
 709         if (cred->ca_cert)
 710                 fprintf(f, "\tca_cert=\"%s\"\n", cred->ca_cert);
 711         if (cred->imsi)
 712                 fprintf(f, "\timsi=\"%s\"\n", cred->imsi);
 713         if (cred->milenage)
 714                 fprintf(f, "\tmilenage=\"%s\"\n", cred->milenage);
 715         if (cred->domain)
 716                 fprintf(f, "\tdomain=\"%s\"\n", cred->domain);
 717 }
 718
 719
 720 #ifndef CONFIG_NO_CONFIG_BLOBS
 721 static int wpa_config_write_blob(FILE *f, struct wpa_config_blob *blob)
 722 {
 723         unsigned char *encoded;
 724
 725         encoded = base64_encode(blob->data, blob->len, NULL);
 726         if (encoded == NULL)
 727                 return -1;
 728
 729         fprintf(f, "\nblob-base64-%s={\n%s}\n", blob->name, encoded);
 730         os_free(encoded);
 731         return 0;
 732 }
 733 #endif /* CONFIG_NO_CONFIG_BLOBS */
 734
 735
 736 static void write_global_bin(FILE *f, const char *field,
 737                              const struct wpabuf *val)
 738 {
 739         size_t i;
 740         const u8 *pos;
 741
 742         if (val == NULL)
 743                 return;
 744
 745         fprintf(f, "%s=", field);
 746         pos = wpabuf_head(val);
 747         for (i = 0; i < wpabuf_len(val); i++)
 748                 fprintf(f, "%02X", *pos++);
 749         fprintf(f, "\n");
 750 }
 751
 752
 753 static void wpa_config_write_global(FILE *f, struct wpa_config *config)
 754 {
 755 #ifdef CONFIG_CTRL_IFACE
 756         if (config->ctrl_interface)
 757                 fprintf(f, "ctrl_interface=%s\n", config->ctrl_interface);
 758         if (config->ctrl_interface_group)
 759                 fprintf(f, "ctrl_interface_group=%s\n",
 760                         config->ctrl_interface_group);
 761 #endif /* CONFIG_CTRL_IFACE */
 762         if (config->eapol_version != DEFAULT_EAPOL_VERSION)
 763                 fprintf(f, "eapol_version=%d\n", config->eapol_version);
 764         if (config->ap_scan != DEFAULT_AP_SCAN)
 765                 fprintf(f, "ap_scan=%d\n", config->ap_scan);
 766         if (config->disable_scan_offload)
 767                 fprintf(f, "disable_scan_offload=%d\n",
 768                         config->disable_scan_offload);
 769         if (config->fast_reauth != DEFAULT_FAST_REAUTH)
 770                 fprintf(f, "fast_reauth=%d\n", config->fast_reauth);
 771         if (config->opensc_engine_path)
 772                 fprintf(f, "opensc_engine_path=%s\n",
 773                         config->opensc_engine_path);
 774         if (config->pkcs11_engine_path)
 775                 fprintf(f, "pkcs11_engine_path=%s\n",
 776                         config->pkcs11_engine_path);
 777         if (config->pkcs11_module_path)
 778                 fprintf(f, "pkcs11_module_path=%s\n",
 779                         config->pkcs11_module_path);
 780         if (config->pcsc_reader)
 781                 fprintf(f, "pcsc_reader=%s\n", config->pcsc_reader);
 782         if (config->pcsc_pin)
 783                 fprintf(f, "pcsc_pin=%s\n", config->pcsc_pin);
 784         if (config->driver_param)
 785                 fprintf(f, "driver_param=%s\n", config->driver_param);
 786         if (config->dot11RSNAConfigPMKLifetime)
 787                 fprintf(f, "dot11RSNAConfigPMKLifetime=%d\n",
 788                         config->dot11RSNAConfigPMKLifetime);
 789         if (config->dot11RSNAConfigPMKReauthThreshold)
 790                 fprintf(f, "dot11RSNAConfigPMKReauthThreshold=%d\n",
 791                         config->dot11RSNAConfigPMKReauthThreshold);
 792         if (config->dot11RSNAConfigSATimeout)
 793                 fprintf(f, "dot11RSNAConfigSATimeout=%d\n",
 794                         config->dot11RSNAConfigSATimeout);
 795         if (config->update_config)
 796                 fprintf(f, "update_config=%d\n", config->update_config);
 797 #ifdef CONFIG_WPS
 798         if (!is_nil_uuid(config->uuid)) {
 799                 char buf[40];
 800                 uuid_bin2str(config->uuid, buf, sizeof(buf));
 801                 fprintf(f, "uuid=%s\n", buf);
 802         }
 803         if (config->device_name)
 804                 fprintf(f, "device_name=%s\n", config->device_name);
 805         if (config->manufacturer)
 806                 fprintf(f, "manufacturer=%s\n", config->manufacturer);
 807         if (config->model_name)
 808                 fprintf(f, "model_name=%s\n", config->model_name);
 809         if (config->model_number)
 810                 fprintf(f, "model_number=%s\n", config->model_number);
 811         if (config->serial_number)
 812                 fprintf(f, "serial_number=%s\n", config->serial_number);
 813         {
 814                 char _buf[WPS_DEV_TYPE_BUFSIZE], *buf;
 815                 buf = wps_dev_type_bin2str(config->device_type,
 816                                            _buf, sizeof(_buf));
 817                 if (os_strcmp(buf, "0-00000000-0") != 0)
 818                         fprintf(f, "device_type=%s\n", buf);
 819         }
 820         if (WPA_GET_BE32(config->os_version))
 821                 fprintf(f, "os_version=%08x\n",
 822                         WPA_GET_BE32(config->os_version));
 823         if (config->config_methods)
 824                 fprintf(f, "config_methods=%s\n", config->config_methods);
 825         if (config->wps_cred_processing)
 826                 fprintf(f, "wps_cred_processing=%d\n",
 827                         config->wps_cred_processing);
 828         if (config->wps_vendor_ext_m1) {
 829                 int i, len = wpabuf_len(config->wps_vendor_ext_m1);
 830                 const u8 *p = wpabuf_head_u8(config->wps_vendor_ext_m1);
 831                 if (len > 0) {
 832                         fprintf(f, "wps_vendor_ext_m1=");
 833                         for (i = 0; i < len; i++)
 834                                 fprintf(f, "%02x", *p++);
 835                         fprintf(f, "\n");
 836                 }
 837         }
 838 #endif /* CONFIG_WPS */
 839 #ifdef CONFIG_P2P
 840         if (config->p2p_listen_reg_class)
 841                 fprintf(f, "p2p_listen_reg_class=%u\n",
 842                         config->p2p_listen_reg_class);
 843         if (config->p2p_listen_channel)
 844                 fprintf(f, "p2p_listen_channel=%u\n",
 845                         config->p2p_listen_channel);
 846         if (config->p2p_oper_reg_class)
 847                 fprintf(f, "p2p_oper_reg_class=%u\n",
 848                         config->p2p_oper_reg_class);
 849         if (config->p2p_oper_channel)
 850                 fprintf(f, "p2p_oper_channel=%u\n", config->p2p_oper_channel);
 851         if (config->p2p_go_intent != DEFAULT_P2P_GO_INTENT)
 852                 fprintf(f, "p2p_go_intent=%u\n", config->p2p_go_intent);
 853         if (config->p2p_ssid_postfix)
 854                 fprintf(f, "p2p_ssid_postfix=%s\n", config->p2p_ssid_postfix);
 855         if (config->persistent_reconnect)
 856                 fprintf(f, "persistent_reconnect=%u\n",
 857                         config->persistent_reconnect);
 858         if (config->p2p_intra_bss != DEFAULT_P2P_INTRA_BSS)
 859                 fprintf(f, "p2p_intra_bss=%u\n", config->p2p_intra_bss);
 860         if (config->p2p_group_idle)
 861                 fprintf(f, "p2p_group_idle=%u\n", config->p2p_group_idle);
 862         if (config->p2p_pref_chan) {
 863                 unsigned int i;
 864                 fprintf(f, "p2p_pref_chan=");
 865                 for (i = 0; i < config->num_p2p_pref_chan; i++) {
 866                         fprintf(f, "%s%u:%u", i > 0 ? "," : "",
 867                                 config->p2p_pref_chan[i].op_class,
 868                                 config->p2p_pref_chan[i].chan);
 869                 }
 870                 fprintf(f, "\n");
 871         }
 872         if (config->p2p_go_ht40)
 873                 fprintf(f, "p2p_go_ht40=%u\n", config->p2p_go_ht40);
 874         if (config->p2p_disabled)
 875                 fprintf(f, "p2p_disabled=%u\n", config->p2p_disabled);
 876         if (config->p2p_no_group_iface)
 877                 fprintf(f, "p2p_no_group_iface=%u\n",
 878                         config->p2p_no_group_iface);
 879 #endif /* CONFIG_P2P */
 880         if (config->country[0] && config->country[1]) {
 881                 fprintf(f, "country=%c%c\n",
 882                         config->country[0], config->country[1]);
 883         }
 884         if (config->bss_max_count != DEFAULT_BSS_MAX_COUNT)
 885                 fprintf(f, "bss_max_count=%u\n", config->bss_max_count);
 886         if (config->bss_expiration_age != DEFAULT_BSS_EXPIRATION_AGE)
 887                 fprintf(f, "bss_expiration_age=%u\n",
 888                         config->bss_expiration_age);
 889         if (config->bss_expiration_scan_count !=
 890             DEFAULT_BSS_EXPIRATION_SCAN_COUNT)
 891                 fprintf(f, "bss_expiration_scan_count=%u\n",
 892                         config->bss_expiration_scan_count);
 893         if (config->filter_ssids)
 894                 fprintf(f, "filter_ssids=%d\n", config->filter_ssids);
 895         if (config->max_num_sta != DEFAULT_MAX_NUM_STA)
 896                 fprintf(f, "max_num_sta=%u\n", config->max_num_sta);
 897         if (config->disassoc_low_ack)
 898                 fprintf(f, "disassoc_low_ack=%u\n", config->disassoc_low_ack);
 899 #ifdef CONFIG_HS20
 900         if (config->hs20)
 901                 fprintf(f, "hs20=1\n");
 902 #endif /* CONFIG_HS20 */
 903 #ifdef CONFIG_INTERWORKING
 904         if (config->interworking)
 905                 fprintf(f, "interworking=%u\n", config->interworking);
 906         if (!is_zero_ether_addr(config->hessid))
 907                 fprintf(f, "hessid=" MACSTR "\n", MAC2STR(config->hessid));
 908         if (config->access_network_type != DEFAULT_ACCESS_NETWORK_TYPE)
 909                 fprintf(f, "access_network_type=%d\n",
 910                         config->access_network_type);
 911 #endif /* CONFIG_INTERWORKING */
 912         if (config->pbc_in_m1)
 913                 fprintf(f, "pbc_in_m1=%u\n", config->pbc_in_m1);
 914         if (config->wps_nfc_dev_pw_id)
 915                 fprintf(f, "wps_nfc_dev_pw_id=%d\n",
 916                         config->wps_nfc_dev_pw_id);
 917         write_global_bin(f, "wps_nfc_dh_pubkey", config->wps_nfc_dh_pubkey);
 918         write_global_bin(f, "wps_nfc_dh_privkey", config->wps_nfc_dh_privkey);
 919         write_global_bin(f, "wps_nfc_dev_pw", config->wps_nfc_dev_pw);
 920
 921         if (config->ext_password_backend)
 922                 fprintf(f, "ext_password_backend=%s\n",
 923                         config->ext_password_backend);
 924         if (config->p2p_go_max_inactivity != DEFAULT_P2P_GO_MAX_INACTIVITY)
 925                 fprintf(f, "p2p_go_max_inactivity=%d\n",
 926                         config->p2p_go_max_inactivity);
 927         if (config->auto_interworking)
 928                 fprintf(f, "auto_interworking=%d\n",
 929                         config->auto_interworking);
 930         if (config->okc)
 931                 fprintf(f, "okc=%d\n", config->okc);
 932         if (config->pmf)
 933                 fprintf(f, "pmf=%d\n", config->pmf);
 934 }
 935
 936 #endif /* CONFIG_NO_CONFIG_WRITE */
 937
 938
 939 int wpa_config_write(const char *name, struct wpa_config *config)
 940 {
 941 #ifndef CONFIG_NO_CONFIG_WRITE
 942         FILE *f;
 943         struct wpa_ssid *ssid;
 944         struct wpa_cred *cred;
 945 #ifndef CONFIG_NO_CONFIG_BLOBS
 946         struct wpa_config_blob *blob;
 947 #endif /* CONFIG_NO_CONFIG_BLOBS */
 948         int ret = 0;
 949
 950         wpa_printf(MSG_DEBUG, "Writing configuration file '%s'", name);
 951
 952         f = fopen(name, "w");
 953         if (f == NULL) {
 954                 wpa_printf(MSG_DEBUG, "Failed to open '%s' for writing", name);
 955                 return -1;
 956         }
 957
 958         wpa_config_write_global(f, config);
 959
 960         for (cred = config->cred; cred; cred = cred->next) {
 961                 fprintf(f, "\ncred={\n");
 962                 wpa_config_write_cred(f, cred);
 963                 fprintf(f, "}\n");
 964         }
 965
 966         for (ssid = config->ssid; ssid; ssid = ssid->next) {
 967                 if (ssid->key_mgmt == WPA_KEY_MGMT_WPS || ssid->temporary)
 968                         continue; /* do not save temporary networks */
 969                 if (wpa_key_mgmt_wpa_psk(ssid->key_mgmt) && !ssid->psk_set &&
 970                     !ssid->passphrase)
 971                         continue; /* do not save invalid network */
 972                 fprintf(f, "\nnetwork={\n");
 973                 wpa_config_write_network(f, ssid);
 974                 fprintf(f, "}\n");
 975         }
 976
 977 #ifndef CONFIG_NO_CONFIG_BLOBS
 978         for (blob = config->blobs; blob; blob = blob->next) {
 979                 ret = wpa_config_write_blob(f, blob);
 980                 if (ret)
 981                         break;
 982         }
 983 #endif /* CONFIG_NO_CONFIG_BLOBS */
 984
 985         fclose(f);
 986
 987         wpa_printf(MSG_DEBUG, "Configuration file '%s' written %ssuccessfully",
 988                    name, ret ? "un" : "");
 989         return ret;
 990 #else /* CONFIG_NO_CONFIG_WRITE */
 991         return -1;
 992 #endif /* CONFIG_NO_CONFIG_WRITE */
 993 }