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 #include "eap_peer/eap_methods.h"
  21 #include "eap_peer/eap.h"
  22
  23
  24 static int newline_terminated(const char *buf, size_t buflen)
  25 {
  26         size_t len = os_strlen(buf);
  27         if (len == 0)
  28                 return 0;
  29         if (len == buflen - 1 && buf[buflen - 1] != '\r' &&
  30             buf[len - 1] != '\n')
  31                 return 0;
  32         return 1;
  33 }
  34
  35
  36 static void skip_line_end(FILE *stream)
  37 {
  38         char buf[100];
  39         while (fgets(buf, sizeof(buf), stream)) {
  40                 buf[sizeof(buf) - 1] = '\0';
  41                 if (newline_terminated(buf, sizeof(buf)))
  42                         return;
  43         }
  44 }
  45
  46
  47 /**
  48  * wpa_config_get_line - Read the next configuration file line
  49  * @s: Buffer for the line
  50  * @size: The buffer length
  51  * @stream: File stream to read from
  52  * @line: Pointer to a variable storing the file line number
  53  * @_pos: Buffer for the pointer to the beginning of data on the text line or
  54  * %NULL if not needed (returned value used instead)
  55  * Returns: Pointer to the beginning of data on the text line or %NULL if no
  56  * more text lines are available.
  57  *
  58  * This function reads the next non-empty line from the configuration file and
  59  * removes comments. The returned string is guaranteed to be null-terminated.
  60  */
  61 static char * wpa_config_get_line(char *s, int size, FILE *stream, int *line,
  62                                   char **_pos)
  63 {
  64         char *pos, *end, *sstart;
  65
  66         while (fgets(s, size, stream)) {
  67                 (*line)++;
  68                 s[size - 1] = '\0';
  69                 if (!newline_terminated(s, size)) {
  70                         /*
  71                          * The line was truncated - skip rest of it to avoid
  72                          * confusing error messages.
  73                          */
  74                         wpa_printf(MSG_INFO, "Long line in configuration file "
  75                                    "truncated");
  76                         skip_line_end(stream);
  77                 }
  78                 pos = s;
  79
  80                 /* Skip white space from the beginning of line. */
  81                 while (*pos == ' ' || *pos == '\t' || *pos == '\r')
  82                         pos++;
  83
  84                 /* Skip comment lines and empty lines */
  85                 if (*pos == '#' || *pos == '\n' || *pos == '\0')
  86                         continue;
  87
  88                 /*
  89                  * Remove # comments unless they are within a double quoted
  90                  * string.
  91                  */
  92                 sstart = os_strchr(pos, '"');
  93                 if (sstart)
  94                         sstart = os_strrchr(sstart + 1, '"');
  95                 if (!sstart)
  96                         sstart = pos;
  97                 end = os_strchr(sstart, '#');
  98                 if (end)
  99                         *end-- = '\0';
 100                 else
 101                         end = pos + os_strlen(pos) - 1;
 102
 103                 /* Remove trailing white space. */
 104                 while (end > pos &&
 105                        (*end == '\n' || *end == ' ' || *end == '\t' ||
 106                         *end == '\r'))
 107                         *end-- = '\0';
 108
 109                 if (*pos == '\0')
 110                         continue;
 111
 112                 if (_pos)
 113                         *_pos = pos;
 114                 return pos;
 115         }
 116
 117         if (_pos)
 118                 *_pos = NULL;
 119         return NULL;
 120 }
 121
 122
 123 static int wpa_config_validate_network(struct wpa_ssid *ssid, int line)
 124 {
 125         int errors = 0;
 126
 127         if (ssid->passphrase) {
 128                 if (ssid->psk_set) {
 129                         wpa_printf(MSG_ERROR, "Line %d: both PSK and "
 130                                    "passphrase configured.", line);
 131                         errors++;
 132                 }
 133                 wpa_config_update_psk(ssid);
 134         }
 135
 136         if ((ssid->group_cipher & WPA_CIPHER_CCMP) &&
 137             !(ssid->pairwise_cipher & WPA_CIPHER_CCMP) &&
 138             !(ssid->pairwise_cipher & WPA_CIPHER_NONE)) {
 139                 /* Group cipher cannot be stronger than the pairwise cipher. */
 140                 wpa_printf(MSG_DEBUG, "Line %d: removed CCMP from group cipher"
 141                            " list since it was not allowed for pairwise "
 142                            "cipher", line);
 143                 ssid->group_cipher &= ~WPA_CIPHER_CCMP;
 144         }
 145
 146         return errors;
 147 }
 148
 149
 150 static struct wpa_ssid * wpa_config_read_network(FILE *f, int *line, int id)
 151 {
 152         struct wpa_ssid *ssid;
 153         int errors = 0, end = 0;
 154         char buf[2000], *pos, *pos2;
 155
 156         wpa_printf(MSG_MSGDUMP, "Line: %d - start of a new network block",
 157                    *line);
 158         ssid = os_zalloc(sizeof(*ssid));
 159         if (ssid == NULL)
 160                 return NULL;
 161         dl_list_init(&ssid->psk_list);
 162         ssid->id = id;
 163
 164         wpa_config_set_network_defaults(ssid);
 165
 166         while (wpa_config_get_line(buf, sizeof(buf), f, line, &pos)) {
 167                 if (os_strcmp(pos, "}") == 0) {
 168                         end = 1;
 169                         break;
 170                 }
 171
 172                 pos2 = os_strchr(pos, '=');
 173                 if (pos2 == NULL) {
 174                         wpa_printf(MSG_ERROR, "Line %d: Invalid SSID line "
 175                                    "'%s'.", *line, pos);
 176                         errors++;
 177                         continue;
 178                 }
 179
 180                 *pos2++ = '\0';
 181                 if (*pos2 == '"') {
 182                         if (os_strchr(pos2 + 1, '"') == NULL) {
 183                                 wpa_printf(MSG_ERROR, "Line %d: invalid "
 184                                            "quotation '%s'.", *line, pos2);
 185                                 errors++;
 186                                 continue;
 187                         }
 188                 }
 189
 190                 if (wpa_config_set(ssid, pos, pos2, *line) < 0)
 191                         errors++;
 192         }
 193
 194         if (!end) {
 195                 wpa_printf(MSG_ERROR, "Line %d: network block was not "
 196                            "terminated properly.", *line);
 197                 errors++;
 198         }
 199
 200         errors += wpa_config_validate_network(ssid, *line);
 201
 202         if (errors) {
 203                 wpa_config_free_ssid(ssid);
 204                 ssid = NULL;
 205         }
 206
 207         return ssid;
 208 }
 209
 210
 211 static struct wpa_cred * wpa_config_read_cred(FILE *f, int *line, int id)
 212 {
 213         struct wpa_cred *cred;
 214         int errors = 0, end = 0;
 215         char buf[256], *pos, *pos2;
 216
 217         wpa_printf(MSG_MSGDUMP, "Line: %d - start of a new cred block", *line);
 218         cred = os_zalloc(sizeof(*cred));
 219         if (cred == NULL)
 220                 return NULL;
 221         cred->id = id;
 222
 223         while (wpa_config_get_line(buf, sizeof(buf), f, line, &pos)) {
 224                 if (os_strcmp(pos, "}") == 0) {
 225                         end = 1;
 226                         break;
 227                 }
 228
 229                 pos2 = os_strchr(pos, '=');
 230                 if (pos2 == NULL) {
 231                         wpa_printf(MSG_ERROR, "Line %d: Invalid cred line "
 232                                    "'%s'.", *line, pos);
 233                         errors++;
 234                         continue;
 235                 }
 236
 237                 *pos2++ = '\0';
 238                 if (*pos2 == '"') {
 239                         if (os_strchr(pos2 + 1, '"') == NULL) {
 240                                 wpa_printf(MSG_ERROR, "Line %d: invalid "
 241                                            "quotation '%s'.", *line, pos2);
 242                                 errors++;
 243                                 continue;
 244                         }
 245                 }
 246
 247                 if (wpa_config_set_cred(cred, pos, pos2, *line) < 0)
 248                         errors++;
 249         }
 250
 251         if (!end) {
 252                 wpa_printf(MSG_ERROR, "Line %d: cred block was not "
 253                            "terminated properly.", *line);
 254                 errors++;
 255         }
 256
 257         if (errors) {
 258                 wpa_config_free_cred(cred);
 259                 cred = NULL;
 260         }
 261
 262         return cred;
 263 }
 264
 265
 266 #ifndef CONFIG_NO_CONFIG_BLOBS
 267 static struct wpa_config_blob * wpa_config_read_blob(FILE *f, int *line,
 268                                                      const char *name)
 269 {
 270         struct wpa_config_blob *blob;
 271         char buf[256], *pos;
 272         unsigned char *encoded = NULL, *nencoded;
 273         int end = 0;
 274         size_t encoded_len = 0, len;
 275
 276         wpa_printf(MSG_MSGDUMP, "Line: %d - start of a new named blob '%s'",
 277                    *line, name);
 278
 279         while (wpa_config_get_line(buf, sizeof(buf), f, line, &pos)) {
 280                 if (os_strcmp(pos, "}") == 0) {
 281                         end = 1;
 282                         break;
 283                 }
 284
 285                 len = os_strlen(pos);
 286                 nencoded = os_realloc(encoded, encoded_len + len);
 287                 if (nencoded == NULL) {
 288                         wpa_printf(MSG_ERROR, "Line %d: not enough memory for "
 289                                    "blob", *line);
 290                         os_free(encoded);
 291                         return NULL;
 292                 }
 293                 encoded = nencoded;
 294                 os_memcpy(encoded + encoded_len, pos, len);
 295                 encoded_len += len;
 296         }
 297
 298         if (!end) {
 299                 wpa_printf(MSG_ERROR, "Line %d: blob was not terminated "
 300                            "properly", *line);
 301                 os_free(encoded);
 302                 return NULL;
 303         }
 304
 305         blob = os_zalloc(sizeof(*blob));
 306         if (blob == NULL) {
 307                 os_free(encoded);
 308                 return NULL;
 309         }
 310         blob->name = os_strdup(name);
 311         blob->data = base64_decode(encoded, encoded_len, &blob->len);
 312         os_free(encoded);
 313
 314         if (blob->name == NULL || blob->data == NULL) {
 315                 wpa_config_free_blob(blob);
 316                 return NULL;
 317         }
 318
 319         return blob;
 320 }
 321
 322
 323 static int wpa_config_process_blob(struct wpa_config *config, FILE *f,
 324                                    int *line, char *bname)
 325 {
 326         char *name_end;
 327         struct wpa_config_blob *blob;
 328
 329         name_end = os_strchr(bname, '=');
 330         if (name_end == NULL) {
 331                 wpa_printf(MSG_ERROR, "Line %d: no blob name terminator",
 332                            *line);
 333                 return -1;
 334         }
 335         *name_end = '\0';
 336
 337         blob = wpa_config_read_blob(f, line, bname);
 338         if (blob == NULL) {
 339                 wpa_printf(MSG_ERROR, "Line %d: failed to read blob %s",
 340                            *line, bname);
 341                 return -1;
 342         }
 343         wpa_config_set_blob(config, blob);
 344         return 0;
 345 }
 346 #endif /* CONFIG_NO_CONFIG_BLOBS */
 347
 348
 349 struct wpa_config * wpa_config_read(const char *name, struct wpa_config *cfgp)
 350 {
 351         FILE *f;
 352         char buf[512], *pos;
 353         int errors = 0, line = 0;
 354         struct wpa_ssid *ssid, *tail = NULL, *head = NULL;
 355         struct wpa_cred *cred, *cred_tail = NULL, *cred_head = NULL;
 356         struct wpa_config *config;
 357         int id = 0;
 358         int cred_id = 0;
 359
 360         if (name == NULL)
 361                 return NULL;
 362         if (cfgp)
 363                 config = cfgp;
 364         else
 365                 config = wpa_config_alloc_empty(NULL, NULL);
 366         if (config == NULL) {
 367                 wpa_printf(MSG_ERROR, "Failed to allocate config file "
 368                            "structure");
 369                 return NULL;
 370         }
 371         head = config->ssid;
 372         cred_head = config->cred;
 373
 374         wpa_printf(MSG_DEBUG, "Reading configuration file '%s'", name);
 375         f = fopen(name, "r");
 376         if (f == NULL) {
 377                 wpa_printf(MSG_ERROR, "Failed to open config file '%s', "
 378                            "error: %s", name, strerror(errno));
 379                 os_free(config);
 380                 return NULL;
 381         }
 382
 383         while (wpa_config_get_line(buf, sizeof(buf), f, &line, &pos)) {
 384                 if (os_strcmp(pos, "network={") == 0) {
 385                         ssid = wpa_config_read_network(f, &line, id++);
 386                         if (ssid == NULL) {
 387                                 wpa_printf(MSG_ERROR, "Line %d: failed to "
 388                                            "parse network block.", line);
 389                                 errors++;
 390                                 continue;
 391                         }
 392                         if (head == NULL) {
 393                                 head = tail = ssid;
 394                         } else {
 395                                 tail->next = ssid;
 396                                 tail = ssid;
 397                         }
 398                         if (wpa_config_add_prio_network(config, ssid)) {
 399                                 wpa_printf(MSG_ERROR, "Line %d: failed to add "
 400                                            "network block to priority list.",
 401                                            line);
 402                                 errors++;
 403                                 continue;
 404                         }
 405                 } else if (os_strcmp(pos, "cred={") == 0) {
 406                         cred = wpa_config_read_cred(f, &line, cred_id++);
 407                         if (cred == NULL) {
 408                                 wpa_printf(MSG_ERROR, "Line %d: failed to "
 409                                            "parse cred block.", line);
 410                                 errors++;
 411                                 continue;
 412                         }
 413                         if (cred_head == NULL) {
 414                                 cred_head = cred_tail = cred;
 415                         } else {
 416                                 cred_tail->next = cred;
 417                                 cred_tail = cred;
 418                         }
 419 #ifndef CONFIG_NO_CONFIG_BLOBS
 420                 } else if (os_strncmp(pos, "blob-base64-", 12) == 0) {
 421                         if (wpa_config_process_blob(config, f, &line, pos + 12)
 422                             < 0) {
 423                                 wpa_printf(MSG_ERROR, "Line %d: failed to "
 424                                            "process blob.", line);
 425                                 errors++;
 426                                 continue;
 427                         }
 428 #endif /* CONFIG_NO_CONFIG_BLOBS */
 429                 } else if (wpa_config_process_global(config, pos, line) < 0) {
 430                         wpa_printf(MSG_ERROR, "Line %d: Invalid configuration "
 431                                    "line '%s'.", line, pos);
 432                         errors++;
 433                         continue;
 434                 }
 435         }
 436
 437         fclose(f);
 438
 439         config->ssid = head;
 440         wpa_config_debug_dump_networks(config);
 441         config->cred = cred_head;
 442
 443 #ifndef WPA_IGNORE_CONFIG_ERRORS
 444         if (errors) {
 445                 wpa_config_free(config);
 446                 config = NULL;
 447                 head = NULL;
 448         }
 449 #endif /* WPA_IGNORE_CONFIG_ERRORS */
 450
 451         return config;
 452 }
 453
 454
 455 #ifndef CONFIG_NO_CONFIG_WRITE
 456
 457 static void write_str(FILE *f, const char *field, struct wpa_ssid *ssid)
 458 {
 459         char *value = wpa_config_get(ssid, field);
 460         if (value == NULL)
 461                 return;
 462         fprintf(f, "\t%s=%s\n", field, value);
 463         os_free(value);
 464 }
 465
 466
 467 static void write_int(FILE *f, const char *field, int value, int def)
 468 {
 469         if (value == def)
 470                 return;
 471         fprintf(f, "\t%s=%d\n", field, value);
 472 }
 473
 474
 475 static void write_bssid(FILE *f, struct wpa_ssid *ssid)
 476 {
 477         char *value = wpa_config_get(ssid, "bssid");
 478         if (value == NULL)
 479                 return;
 480         fprintf(f, "\tbssid=%s\n", value);
 481         os_free(value);
 482 }
 483
 484
 485 static void write_psk(FILE *f, struct wpa_ssid *ssid)
 486 {
 487         char *value = wpa_config_get(ssid, "psk");
 488         if (value == NULL)
 489                 return;
 490         fprintf(f, "\tpsk=%s\n", value);
 491         os_free(value);
 492 }
 493
 494
 495 static void write_proto(FILE *f, struct wpa_ssid *ssid)
 496 {
 497         char *value;
 498
 499         if (ssid->proto == DEFAULT_PROTO)
 500                 return;
 501
 502         value = wpa_config_get(ssid, "proto");
 503         if (value == NULL)
 504                 return;
 505         if (value[0])
 506                 fprintf(f, "\tproto=%s\n", value);
 507         os_free(value);
 508 }
 509
 510
 511 static void write_key_mgmt(FILE *f, struct wpa_ssid *ssid)
 512 {
 513         char *value;
 514
 515         if (ssid->key_mgmt == DEFAULT_KEY_MGMT)
 516                 return;
 517
 518         value = wpa_config_get(ssid, "key_mgmt");
 519         if (value == NULL)
 520                 return;
 521         if (value[0])
 522                 fprintf(f, "\tkey_mgmt=%s\n", value);
 523         os_free(value);
 524 }
 525
 526
 527 static void write_pairwise(FILE *f, struct wpa_ssid *ssid)
 528 {
 529         char *value;
 530
 531         if (ssid->pairwise_cipher == DEFAULT_PAIRWISE)
 532                 return;
 533
 534         value = wpa_config_get(ssid, "pairwise");
 535         if (value == NULL)
 536                 return;
 537         if (value[0])
 538                 fprintf(f, "\tpairwise=%s\n", value);
 539         os_free(value);
 540 }
 541
 542
 543 static void write_group(FILE *f, struct wpa_ssid *ssid)
 544 {
 545         char *value;
 546
 547         if (ssid->group_cipher == DEFAULT_GROUP)
 548                 return;
 549
 550         value = wpa_config_get(ssid, "group");
 551         if (value == NULL)
 552                 return;
 553         if (value[0])
 554                 fprintf(f, "\tgroup=%s\n", value);
 555         os_free(value);
 556 }
 557
 558
 559 static void write_auth_alg(FILE *f, struct wpa_ssid *ssid)
 560 {
 561         char *value;
 562
 563         if (ssid->auth_alg == 0)
 564                 return;
 565
 566         value = wpa_config_get(ssid, "auth_alg");
 567         if (value == NULL)
 568                 return;
 569         if (value[0])
 570                 fprintf(f, "\tauth_alg=%s\n", value);
 571         os_free(value);
 572 }
 573
 574
 575 #ifdef IEEE8021X_EAPOL
 576 static void write_eap(FILE *f, struct wpa_ssid *ssid)
 577 {
 578         char *value;
 579
 580         value = wpa_config_get(ssid, "eap");
 581         if (value == NULL)
 582                 return;
 583
 584         if (value[0])
 585                 fprintf(f, "\teap=%s\n", value);
 586         os_free(value);
 587 }
 588 #endif /* IEEE8021X_EAPOL */
 589
 590
 591 static void write_wep_key(FILE *f, int idx, struct wpa_ssid *ssid)
 592 {
 593         char field[20], *value;
 594         int res;
 595
 596         res = os_snprintf(field, sizeof(field), "wep_key%d", idx);
 597         if (res < 0 || (size_t) res >= sizeof(field))
 598                 return;
 599         value = wpa_config_get(ssid, field);
 600         if (value) {
 601                 fprintf(f, "\t%s=%s\n", field, value);
 602                 os_free(value);
 603         }
 604 }
 605
 606
 607 #ifdef CONFIG_P2P
 608
 609 static void write_p2p_client_list(FILE *f, struct wpa_ssid *ssid)
 610 {
 611         char *value = wpa_config_get(ssid, "p2p_client_list");
 612         if (value == NULL)
 613                 return;
 614         fprintf(f, "\tp2p_client_list=%s\n", value);
 615         os_free(value);
 616 }
 617
 618
 619 static void write_psk_list(FILE *f, struct wpa_ssid *ssid)
 620 {
 621         struct psk_list_entry *psk;
 622         char hex[32 * 2 + 1];
 623
 624         dl_list_for_each(psk, &ssid->psk_list, struct psk_list_entry, list) {
 625                 wpa_snprintf_hex(hex, sizeof(hex), psk->psk, sizeof(psk->psk));
 626                 fprintf(f, "\tpsk_list=%s" MACSTR "-%s\n",
 627                         psk->p2p ? "P2P-" : "", MAC2STR(psk->addr), hex);
 628         }
 629 }
 630
 631 #endif /* CONFIG_P2P */
 632
 633
 634 static void wpa_config_write_network(FILE *f, struct wpa_ssid *ssid)
 635 {
 636         int i;
 637
 638 #define STR(t) write_str(f, #t, ssid)
 639 #define INT(t) write_int(f, #t, ssid->t, 0)
 640 #define INTe(t) write_int(f, #t, ssid->eap.t, 0)
 641 #define INT_DEF(t, def) write_int(f, #t, ssid->t, def)
 642 #define INT_DEFe(t, def) write_int(f, #t, ssid->eap.t, def)
 643
 644         STR(ssid);
 645         INT(scan_ssid);
 646         write_bssid(f, ssid);
 647         write_psk(f, ssid);
 648         write_proto(f, ssid);
 649         write_key_mgmt(f, ssid);
 650         INT_DEF(bg_scan_period, DEFAULT_BG_SCAN_PERIOD);
 651         write_pairwise(f, ssid);
 652         write_group(f, ssid);
 653         write_auth_alg(f, ssid);
 654         STR(bgscan);
 655         STR(autoscan);
 656 #ifdef IEEE8021X_EAPOL
 657         write_eap(f, ssid);
 658         STR(identity);
 659         STR(anonymous_identity);
 660         STR(password);
 661         STR(ca_cert);
 662         STR(ca_path);
 663         STR(client_cert);
 664         STR(private_key);
 665         STR(private_key_passwd);
 666         STR(dh_file);
 667         STR(subject_match);
 668         STR(altsubject_match);
 669         STR(ca_cert2);
 670         STR(ca_path2);
 671         STR(client_cert2);
 672         STR(private_key2);
 673         STR(private_key2_passwd);
 674         STR(dh_file2);
 675         STR(subject_match2);
 676         STR(altsubject_match2);
 677         STR(phase1);
 678         STR(phase2);
 679         STR(pcsc);
 680         STR(pin);
 681         STR(engine_id);
 682         STR(key_id);
 683         STR(cert_id);
 684         STR(ca_cert_id);
 685         STR(key2_id);
 686         STR(pin2);
 687         STR(engine2_id);
 688         STR(cert2_id);
 689         STR(ca_cert2_id);
 690         INTe(engine);
 691         INTe(engine2);
 692         INT_DEF(eapol_flags, DEFAULT_EAPOL_FLAGS);
 693 #endif /* IEEE8021X_EAPOL */
 694         for (i = 0; i < 4; i++)
 695                 write_wep_key(f, i, ssid);
 696         INT(wep_tx_keyidx);
 697         INT(priority);
 698 #ifdef IEEE8021X_EAPOL
 699         INT_DEF(eap_workaround, DEFAULT_EAP_WORKAROUND);
 700         STR(pac_file);
 701         INT_DEFe(fragment_size, DEFAULT_FRAGMENT_SIZE);
 702 #endif /* IEEE8021X_EAPOL */
 703         INT(mode);
 704         INT(frequency);
 705         write_int(f, "proactive_key_caching", ssid->proactive_key_caching, -1);
 706         INT(disabled);
 707         INT(peerkey);
 708 #ifdef CONFIG_IEEE80211W
 709         write_int(f, "ieee80211w", ssid->ieee80211w,
 710                   MGMT_FRAME_PROTECTION_DEFAULT);
 711 #endif /* CONFIG_IEEE80211W */
 712         STR(id_str);
 713 #ifdef CONFIG_P2P
 714         write_p2p_client_list(f, ssid);
 715         write_psk_list(f, ssid);
 716 #endif /* CONFIG_P2P */
 717         INT(dtim_period);
 718         INT(beacon_int);
 719
 720 #undef STR
 721 #undef INT
 722 #undef INT_DEF
 723 }
 724
 725
 726 static void wpa_config_write_cred(FILE *f, struct wpa_cred *cred)
 727 {
 728         if (cred->priority)
 729                 fprintf(f, "\tpriority=%d\n", cred->priority);
 730         if (cred->pcsc)
 731                 fprintf(f, "\tpcsc=%d\n", cred->pcsc);
 732         if (cred->realm)
 733                 fprintf(f, "\trealm=\"%s\"\n", cred->realm);
 734         if (cred->username)
 735                 fprintf(f, "\tusername=\"%s\"\n", cred->username);
 736         if (cred->password && cred->ext_password)
 737                 fprintf(f, "\tpassword=ext:%s\n", cred->password);
 738         else if (cred->password)
 739                 fprintf(f, "\tpassword=\"%s\"\n", cred->password);
 740         if (cred->ca_cert)
 741                 fprintf(f, "\tca_cert=\"%s\"\n", cred->ca_cert);
 742         if (cred->client_cert)
 743                 fprintf(f, "\tclient_cert=\"%s\"\n", cred->client_cert);
 744         if (cred->private_key)
 745                 fprintf(f, "\tprivate_key=\"%s\"\n", cred->private_key);
 746         if (cred->private_key_passwd)
 747                 fprintf(f, "\tprivate_key_passwd=\"%s\"\n",
 748                         cred->private_key_passwd);
 749         if (cred->imsi)
 750                 fprintf(f, "\timsi=\"%s\"\n", cred->imsi);
 751         if (cred->milenage)
 752                 fprintf(f, "\tmilenage=\"%s\"\n", cred->milenage);
 753         if (cred->domain)
 754                 fprintf(f, "\tdomain=\"%s\"\n", cred->domain);
 755         if (cred->roaming_consortium_len) {
 756                 size_t i;
 757                 fprintf(f, "\troaming_consortium=");
 758                 for (i = 0; i < cred->roaming_consortium_len; i++)
 759                         fprintf(f, "%02x", cred->roaming_consortium[i]);
 760                 fprintf(f, "\n");
 761         }
 762         if (cred->eap_method) {
 763                 const char *name;
 764                 name = eap_get_name(cred->eap_method[0].vendor,
 765                                     cred->eap_method[0].method);
 766                 fprintf(f, "\teap=%s\n", name);
 767         }
 768         if (cred->phase1)
 769                 fprintf(f, "\tphase1=\"%s\"\n", cred->phase1);
 770         if (cred->phase2)
 771                 fprintf(f, "\tphase2=\"%s\"\n", cred->phase2);
 772         if (cred->excluded_ssid) {
 773                 size_t i, j;
 774                 for (i = 0; i < cred->num_excluded_ssid; i++) {
 775                         struct excluded_ssid *e = &cred->excluded_ssid[i];
 776                         fprintf(f, "\texcluded_ssid=");
 777                         for (j = 0; j < e->ssid_len; j++)
 778                                 fprintf(f, "%02x", e->ssid[j]);
 779                         fprintf(f, "\n");
 780                 }
 781         }
 782 }
 783
 784
 785 #ifndef CONFIG_NO_CONFIG_BLOBS
 786 static int wpa_config_write_blob(FILE *f, struct wpa_config_blob *blob)
 787 {
 788         unsigned char *encoded;
 789
 790         encoded = base64_encode(blob->data, blob->len, NULL);
 791         if (encoded == NULL)
 792                 return -1;
 793
 794         fprintf(f, "\nblob-base64-%s={\n%s}\n", blob->name, encoded);
 795         os_free(encoded);
 796         return 0;
 797 }
 798 #endif /* CONFIG_NO_CONFIG_BLOBS */
 799
 800
 801 static void write_global_bin(FILE *f, const char *field,
 802                              const struct wpabuf *val)
 803 {
 804         size_t i;
 805         const u8 *pos;
 806
 807         if (val == NULL)
 808                 return;
 809
 810         fprintf(f, "%s=", field);
 811         pos = wpabuf_head(val);
 812         for (i = 0; i < wpabuf_len(val); i++)
 813                 fprintf(f, "%02X", *pos++);
 814         fprintf(f, "\n");
 815 }
 816
 817
 818 static void wpa_config_write_global(FILE *f, struct wpa_config *config)
 819 {
 820 #ifdef CONFIG_CTRL_IFACE
 821         if (config->ctrl_interface)
 822                 fprintf(f, "ctrl_interface=%s\n", config->ctrl_interface);
 823         if (config->ctrl_interface_group)
 824                 fprintf(f, "ctrl_interface_group=%s\n",
 825                         config->ctrl_interface_group);
 826 #endif /* CONFIG_CTRL_IFACE */
 827         if (config->eapol_version != DEFAULT_EAPOL_VERSION)
 828                 fprintf(f, "eapol_version=%d\n", config->eapol_version);
 829         if (config->ap_scan != DEFAULT_AP_SCAN)
 830                 fprintf(f, "ap_scan=%d\n", config->ap_scan);
 831         if (config->disable_scan_offload)
 832                 fprintf(f, "disable_scan_offload=%d\n",
 833                         config->disable_scan_offload);
 834         if (config->fast_reauth != DEFAULT_FAST_REAUTH)
 835                 fprintf(f, "fast_reauth=%d\n", config->fast_reauth);
 836         if (config->opensc_engine_path)
 837                 fprintf(f, "opensc_engine_path=%s\n",
 838                         config->opensc_engine_path);
 839         if (config->pkcs11_engine_path)
 840                 fprintf(f, "pkcs11_engine_path=%s\n",
 841                         config->pkcs11_engine_path);
 842         if (config->pkcs11_module_path)
 843                 fprintf(f, "pkcs11_module_path=%s\n",
 844                         config->pkcs11_module_path);
 845         if (config->pcsc_reader)
 846                 fprintf(f, "pcsc_reader=%s\n", config->pcsc_reader);
 847         if (config->pcsc_pin)
 848                 fprintf(f, "pcsc_pin=%s\n", config->pcsc_pin);
 849         if (config->driver_param)
 850                 fprintf(f, "driver_param=%s\n", config->driver_param);
 851         if (config->dot11RSNAConfigPMKLifetime)
 852                 fprintf(f, "dot11RSNAConfigPMKLifetime=%d\n",
 853                         config->dot11RSNAConfigPMKLifetime);
 854         if (config->dot11RSNAConfigPMKReauthThreshold)
 855                 fprintf(f, "dot11RSNAConfigPMKReauthThreshold=%d\n",
 856                         config->dot11RSNAConfigPMKReauthThreshold);
 857         if (config->dot11RSNAConfigSATimeout)
 858                 fprintf(f, "dot11RSNAConfigSATimeout=%d\n",
 859                         config->dot11RSNAConfigSATimeout);
 860         if (config->update_config)
 861                 fprintf(f, "update_config=%d\n", config->update_config);
 862 #ifdef CONFIG_WPS
 863         if (!is_nil_uuid(config->uuid)) {
 864                 char buf[40];
 865                 uuid_bin2str(config->uuid, buf, sizeof(buf));
 866                 fprintf(f, "uuid=%s\n", buf);
 867         }
 868         if (config->device_name)
 869                 fprintf(f, "device_name=%s\n", config->device_name);
 870         if (config->manufacturer)
 871                 fprintf(f, "manufacturer=%s\n", config->manufacturer);
 872         if (config->model_name)
 873                 fprintf(f, "model_name=%s\n", config->model_name);
 874         if (config->model_number)
 875                 fprintf(f, "model_number=%s\n", config->model_number);
 876         if (config->serial_number)
 877                 fprintf(f, "serial_number=%s\n", config->serial_number);
 878         {
 879                 char _buf[WPS_DEV_TYPE_BUFSIZE], *buf;
 880                 buf = wps_dev_type_bin2str(config->device_type,
 881                                            _buf, sizeof(_buf));
 882                 if (os_strcmp(buf, "0-00000000-0") != 0)
 883                         fprintf(f, "device_type=%s\n", buf);
 884         }
 885         if (WPA_GET_BE32(config->os_version))
 886                 fprintf(f, "os_version=%08x\n",
 887                         WPA_GET_BE32(config->os_version));
 888         if (config->config_methods)
 889                 fprintf(f, "config_methods=%s\n", config->config_methods);
 890         if (config->wps_cred_processing)
 891                 fprintf(f, "wps_cred_processing=%d\n",
 892                         config->wps_cred_processing);
 893         if (config->wps_vendor_ext_m1) {
 894                 int i, len = wpabuf_len(config->wps_vendor_ext_m1);
 895                 const u8 *p = wpabuf_head_u8(config->wps_vendor_ext_m1);
 896                 if (len > 0) {
 897                         fprintf(f, "wps_vendor_ext_m1=");
 898                         for (i = 0; i < len; i++)
 899                                 fprintf(f, "%02x", *p++);
 900                         fprintf(f, "\n");
 901                 }
 902         }
 903 #endif /* CONFIG_WPS */
 904 #ifdef CONFIG_P2P
 905         if (config->p2p_listen_reg_class)
 906                 fprintf(f, "p2p_listen_reg_class=%u\n",
 907                         config->p2p_listen_reg_class);
 908         if (config->p2p_listen_channel)
 909                 fprintf(f, "p2p_listen_channel=%u\n",
 910                         config->p2p_listen_channel);
 911         if (config->p2p_oper_reg_class)
 912                 fprintf(f, "p2p_oper_reg_class=%u\n",
 913                         config->p2p_oper_reg_class);
 914         if (config->p2p_oper_channel)
 915                 fprintf(f, "p2p_oper_channel=%u\n", config->p2p_oper_channel);
 916         if (config->p2p_go_intent != DEFAULT_P2P_GO_INTENT)
 917                 fprintf(f, "p2p_go_intent=%u\n", config->p2p_go_intent);
 918         if (config->p2p_ssid_postfix)
 919                 fprintf(f, "p2p_ssid_postfix=%s\n", config->p2p_ssid_postfix);
 920         if (config->persistent_reconnect)
 921                 fprintf(f, "persistent_reconnect=%u\n",
 922                         config->persistent_reconnect);
 923         if (config->p2p_intra_bss != DEFAULT_P2P_INTRA_BSS)
 924                 fprintf(f, "p2p_intra_bss=%u\n", config->p2p_intra_bss);
 925         if (config->p2p_group_idle)
 926                 fprintf(f, "p2p_group_idle=%u\n", config->p2p_group_idle);
 927         if (config->p2p_pref_chan) {
 928                 unsigned int i;
 929                 fprintf(f, "p2p_pref_chan=");
 930                 for (i = 0; i < config->num_p2p_pref_chan; i++) {
 931                         fprintf(f, "%s%u:%u", i > 0 ? "," : "",
 932                                 config->p2p_pref_chan[i].op_class,
 933                                 config->p2p_pref_chan[i].chan);
 934                 }
 935                 fprintf(f, "\n");
 936         }
 937         if (config->p2p_go_ht40)
 938                 fprintf(f, "p2p_go_ht40=%u\n", config->p2p_go_ht40);
 939         if (config->p2p_disabled)
 940                 fprintf(f, "p2p_disabled=%u\n", config->p2p_disabled);
 941         if (config->p2p_no_group_iface)
 942                 fprintf(f, "p2p_no_group_iface=%u\n",
 943                         config->p2p_no_group_iface);
 944         if (config->p2p_ignore_shared_freq)
 945                 fprintf(f, "p2p_ignore_shared_freq=%u\n",
 946                         config->p2p_ignore_shared_freq);
 947 #endif /* CONFIG_P2P */
 948         if (config->country[0] && config->country[1]) {
 949                 fprintf(f, "country=%c%c\n",
 950                         config->country[0], config->country[1]);
 951         }
 952         if (config->bss_max_count != DEFAULT_BSS_MAX_COUNT)
 953                 fprintf(f, "bss_max_count=%u\n", config->bss_max_count);
 954         if (config->bss_expiration_age != DEFAULT_BSS_EXPIRATION_AGE)
 955                 fprintf(f, "bss_expiration_age=%u\n",
 956                         config->bss_expiration_age);
 957         if (config->bss_expiration_scan_count !=
 958             DEFAULT_BSS_EXPIRATION_SCAN_COUNT)
 959                 fprintf(f, "bss_expiration_scan_count=%u\n",
 960                         config->bss_expiration_scan_count);
 961         if (config->filter_ssids)
 962                 fprintf(f, "filter_ssids=%d\n", config->filter_ssids);
 963         if (config->max_num_sta != DEFAULT_MAX_NUM_STA)
 964                 fprintf(f, "max_num_sta=%u\n", config->max_num_sta);
 965         if (config->disassoc_low_ack)
 966                 fprintf(f, "disassoc_low_ack=%u\n", config->disassoc_low_ack);
 967 #ifdef CONFIG_HS20
 968         if (config->hs20)
 969                 fprintf(f, "hs20=1\n");
 970 #endif /* CONFIG_HS20 */
 971 #ifdef CONFIG_INTERWORKING
 972         if (config->interworking)
 973                 fprintf(f, "interworking=%u\n", config->interworking);
 974         if (!is_zero_ether_addr(config->hessid))
 975                 fprintf(f, "hessid=" MACSTR "\n", MAC2STR(config->hessid));
 976         if (config->access_network_type != DEFAULT_ACCESS_NETWORK_TYPE)
 977                 fprintf(f, "access_network_type=%d\n",
 978                         config->access_network_type);
 979 #endif /* CONFIG_INTERWORKING */
 980         if (config->pbc_in_m1)
 981                 fprintf(f, "pbc_in_m1=%u\n", config->pbc_in_m1);
 982         if (config->wps_nfc_pw_from_config) {
 983                 if (config->wps_nfc_dev_pw_id)
 984                         fprintf(f, "wps_nfc_dev_pw_id=%d\n",
 985                                 config->wps_nfc_dev_pw_id);
 986                 write_global_bin(f, "wps_nfc_dh_pubkey",
 987                                  config->wps_nfc_dh_pubkey);
 988                 write_global_bin(f, "wps_nfc_dh_privkey",
 989                                  config->wps_nfc_dh_privkey);
 990                 write_global_bin(f, "wps_nfc_dev_pw", config->wps_nfc_dev_pw);
 991         }
 992
 993         if (config->ext_password_backend)
 994                 fprintf(f, "ext_password_backend=%s\n",
 995                         config->ext_password_backend);
 996         if (config->p2p_go_max_inactivity != DEFAULT_P2P_GO_MAX_INACTIVITY)
 997                 fprintf(f, "p2p_go_max_inactivity=%d\n",
 998                         config->p2p_go_max_inactivity);
 999         if (config->auto_interworking)
1000                 fprintf(f, "auto_interworking=%d\n",
1001                         config->auto_interworking);
1002         if (config->okc)
1003                 fprintf(f, "okc=%d\n", config->okc);
1004         if (config->pmf)
1005                 fprintf(f, "pmf=%d\n", config->pmf);
1006         if (config->dtim_period)
1007                 fprintf(f, "dtim_period=%d\n", config->dtim_period);
1008         if (config->beacon_int)
1009                 fprintf(f, "beacon_int=%d\n", config->beacon_int);
1010
1011         if (config->sae_groups) {
1012                 int i;
1013                 fprintf(f, "sae_groups=");
1014                 for (i = 0; config->sae_groups[i] >= 0; i++) {
1015                         fprintf(f, "%s%d", i > 0 ? " " : "",
1016                                 config->sae_groups[i]);
1017                 }
1018                 fprintf(f, "\n");
1019         }
1020
1021         if (config->ap_vendor_elements) {
1022                 int i, len = wpabuf_len(config->ap_vendor_elements);
1023                 const u8 *p = wpabuf_head_u8(config->ap_vendor_elements);
1024                 if (len > 0) {
1025                         fprintf(f, "ap_vendor_elements=");
1026                         for (i = 0; i < len; i++)
1027                                 fprintf(f, "%02x", *p++);
1028                         fprintf(f, "\n");
1029                 }
1030         }
1031
1032         if (config->ignore_old_scan_res)
1033                 fprintf(f, "ignore_old_scan_res=%d\n",
1034                         config->ignore_old_scan_res);
1035
1036         if (config->freq_list && config->freq_list[0]) {
1037                 int i;
1038                 fprintf(f, "freq_list=");
1039                 for (i = 0; config->freq_list[i]; i++) {
1040                         fprintf(f, "%s%u", i > 0 ? " " : "",
1041                                 config->freq_list[i]);
1042                 }
1043                 fprintf(f, "\n");
1044         }
1045         if (config->scan_cur_freq != DEFAULT_SCAN_CUR_FREQ)
1046                 fprintf(f, "scan_cur_freq=%d\n", config->scan_cur_freq);
1047
1048         if (config->sched_scan_interval)
1049                 fprintf(f, "sched_scan_interval=%u\n",
1050                         config->sched_scan_interval);
1051 }
1052
1053 #endif /* CONFIG_NO_CONFIG_WRITE */
1054
1055
1056 int wpa_config_write(const char *name, struct wpa_config *config)
1057 {
1058 #ifndef CONFIG_NO_CONFIG_WRITE
1059         FILE *f;
1060         struct wpa_ssid *ssid;
1061         struct wpa_cred *cred;
1062 #ifndef CONFIG_NO_CONFIG_BLOBS
1063         struct wpa_config_blob *blob;
1064 #endif /* CONFIG_NO_CONFIG_BLOBS */
1065         int ret = 0;
1066
1067         wpa_printf(MSG_DEBUG, "Writing configuration file '%s'", name);
1068
1069         f = fopen(name, "w");
1070         if (f == NULL) {
1071                 wpa_printf(MSG_DEBUG, "Failed to open '%s' for writing", name);
1072                 return -1;
1073         }
1074
1075         wpa_config_write_global(f, config);
1076
1077         for (cred = config->cred; cred; cred = cred->next) {
1078                 fprintf(f, "\ncred={\n");
1079                 wpa_config_write_cred(f, cred);
1080                 fprintf(f, "}\n");
1081         }
1082
1083         for (ssid = config->ssid; ssid; ssid = ssid->next) {
1084                 if (ssid->key_mgmt == WPA_KEY_MGMT_WPS || ssid->temporary)
1085                         continue; /* do not save temporary networks */
1086                 if (wpa_key_mgmt_wpa_psk(ssid->key_mgmt) && !ssid->psk_set &&
1087                     !ssid->passphrase)
1088                         continue; /* do not save invalid network */
1089                 fprintf(f, "\nnetwork={\n");
1090                 wpa_config_write_network(f, ssid);
1091                 fprintf(f, "}\n");
1092         }
1093
1094 #ifndef CONFIG_NO_CONFIG_BLOBS
1095         for (blob = config->blobs; blob; blob = blob->next) {
1096                 ret = wpa_config_write_blob(f, blob);
1097                 if (ret)
1098                         break;
1099         }
1100 #endif /* CONFIG_NO_CONFIG_BLOBS */
1101
1102         fclose(f);
1103
1104         wpa_printf(MSG_DEBUG, "Configuration file '%s' written %ssuccessfully",
1105                    name, ret ? "un" : "");
1106         return ret;
1107 #else /* CONFIG_NO_CONFIG_WRITE */
1108         return -1;
1109 #endif /* CONFIG_NO_CONFIG_WRITE */
1110 }