config_file.c revision 0ccb66edb8d2a0a397320ace3ec2a03fb0d00d5f
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 24static 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 36static 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 */ 61static 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 123static 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 150static 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 ssid->id = id; 162 163 wpa_config_set_network_defaults(ssid); 164 165 while (wpa_config_get_line(buf, sizeof(buf), f, line, &pos)) { 166 if (os_strcmp(pos, "}") == 0) { 167 end = 1; 168 break; 169 } 170 171 pos2 = os_strchr(pos, '='); 172 if (pos2 == NULL) { 173 wpa_printf(MSG_ERROR, "Line %d: Invalid SSID line " 174 "'%s'.", *line, pos); 175 errors++; 176 continue; 177 } 178 179 *pos2++ = '\0'; 180 if (*pos2 == '"') { 181 if (os_strchr(pos2 + 1, '"') == NULL) { 182 wpa_printf(MSG_ERROR, "Line %d: invalid " 183 "quotation '%s'.", *line, pos2); 184 errors++; 185 continue; 186 } 187 } 188 189 if (wpa_config_set(ssid, pos, pos2, *line) < 0) 190 errors++; 191 } 192 193 if (!end) { 194 wpa_printf(MSG_ERROR, "Line %d: network block was not " 195 "terminated properly.", *line); 196 errors++; 197 } 198 199 errors += wpa_config_validate_network(ssid, *line); 200 201 if (errors) { 202 wpa_config_free_ssid(ssid); 203 ssid = NULL; 204 } 205 206 return ssid; 207} 208 209 210static struct wpa_cred * wpa_config_read_cred(FILE *f, int *line, int id) 211{ 212 struct wpa_cred *cred; 213 int errors = 0, end = 0; 214 char buf[256], *pos, *pos2; 215 216 wpa_printf(MSG_MSGDUMP, "Line: %d - start of a new cred block", *line); 217 cred = os_zalloc(sizeof(*cred)); 218 if (cred == NULL) 219 return NULL; 220 cred->id = id; 221 222 while (wpa_config_get_line(buf, sizeof(buf), f, line, &pos)) { 223 if (os_strcmp(pos, "}") == 0) { 224 end = 1; 225 break; 226 } 227 228 pos2 = os_strchr(pos, '='); 229 if (pos2 == NULL) { 230 wpa_printf(MSG_ERROR, "Line %d: Invalid cred line " 231 "'%s'.", *line, pos); 232 errors++; 233 continue; 234 } 235 236 *pos2++ = '\0'; 237 if (*pos2 == '"') { 238 if (os_strchr(pos2 + 1, '"') == NULL) { 239 wpa_printf(MSG_ERROR, "Line %d: invalid " 240 "quotation '%s'.", *line, pos2); 241 errors++; 242 continue; 243 } 244 } 245 246 if (wpa_config_set_cred(cred, pos, pos2, *line) < 0) 247 errors++; 248 } 249 250 if (!end) { 251 wpa_printf(MSG_ERROR, "Line %d: cred block was not " 252 "terminated properly.", *line); 253 errors++; 254 } 255 256 if (errors) { 257 wpa_config_free_cred(cred); 258 cred = NULL; 259 } 260 261 return cred; 262} 263 264 265#ifndef CONFIG_NO_CONFIG_BLOBS 266static struct wpa_config_blob * wpa_config_read_blob(FILE *f, int *line, 267 const char *name) 268{ 269 struct wpa_config_blob *blob; 270 char buf[256], *pos; 271 unsigned char *encoded = NULL, *nencoded; 272 int end = 0; 273 size_t encoded_len = 0, len; 274 275 wpa_printf(MSG_MSGDUMP, "Line: %d - start of a new named blob '%s'", 276 *line, name); 277 278 while (wpa_config_get_line(buf, sizeof(buf), f, line, &pos)) { 279 if (os_strcmp(pos, "}") == 0) { 280 end = 1; 281 break; 282 } 283 284 len = os_strlen(pos); 285 nencoded = os_realloc(encoded, encoded_len + len); 286 if (nencoded == NULL) { 287 wpa_printf(MSG_ERROR, "Line %d: not enough memory for " 288 "blob", *line); 289 os_free(encoded); 290 return NULL; 291 } 292 encoded = nencoded; 293 os_memcpy(encoded + encoded_len, pos, len); 294 encoded_len += len; 295 } 296 297 if (!end) { 298 wpa_printf(MSG_ERROR, "Line %d: blob was not terminated " 299 "properly", *line); 300 os_free(encoded); 301 return NULL; 302 } 303 304 blob = os_zalloc(sizeof(*blob)); 305 if (blob == NULL) { 306 os_free(encoded); 307 return NULL; 308 } 309 blob->name = os_strdup(name); 310 blob->data = base64_decode(encoded, encoded_len, &blob->len); 311 os_free(encoded); 312 313 if (blob->name == NULL || blob->data == NULL) { 314 wpa_config_free_blob(blob); 315 return NULL; 316 } 317 318 return blob; 319} 320 321 322static int wpa_config_process_blob(struct wpa_config *config, FILE *f, 323 int *line, char *bname) 324{ 325 char *name_end; 326 struct wpa_config_blob *blob; 327 328 name_end = os_strchr(bname, '='); 329 if (name_end == NULL) { 330 wpa_printf(MSG_ERROR, "Line %d: no blob name terminator", 331 *line); 332 return -1; 333 } 334 *name_end = '\0'; 335 336 blob = wpa_config_read_blob(f, line, bname); 337 if (blob == NULL) { 338 wpa_printf(MSG_ERROR, "Line %d: failed to read blob %s", 339 *line, bname); 340 return -1; 341 } 342 wpa_config_set_blob(config, blob); 343 return 0; 344} 345#endif /* CONFIG_NO_CONFIG_BLOBS */ 346 347 348struct wpa_config * wpa_config_read(const char *name) 349{ 350 FILE *f; 351 char buf[512], *pos; 352 int errors = 0, line = 0; 353 struct wpa_ssid *ssid, *tail = NULL, *head = NULL; 354 struct wpa_cred *cred, *cred_tail = NULL, *cred_head = NULL; 355 struct wpa_config *config; 356 int id = 0; 357 int cred_id = 0; 358 359 config = wpa_config_alloc_empty(NULL, NULL); 360 if (config == NULL) { 361 wpa_printf(MSG_ERROR, "Failed to allocate config file " 362 "structure"); 363 return NULL; 364 } 365 366 wpa_printf(MSG_DEBUG, "Reading configuration file '%s'", name); 367 f = fopen(name, "r"); 368 if (f == NULL) { 369 wpa_printf(MSG_ERROR, "Failed to open config file '%s', " 370 "error: %s", name, strerror(errno)); 371 os_free(config); 372 return NULL; 373 } 374 375 while (wpa_config_get_line(buf, sizeof(buf), f, &line, &pos)) { 376 if (os_strcmp(pos, "network={") == 0) { 377 ssid = wpa_config_read_network(f, &line, id++); 378 if (ssid == NULL) { 379 wpa_printf(MSG_ERROR, "Line %d: failed to " 380 "parse network block.", line); 381 errors++; 382 continue; 383 } 384 if (head == NULL) { 385 head = tail = ssid; 386 } else { 387 tail->next = ssid; 388 tail = ssid; 389 } 390 if (wpa_config_add_prio_network(config, ssid)) { 391 wpa_printf(MSG_ERROR, "Line %d: failed to add " 392 "network block to priority list.", 393 line); 394 errors++; 395 continue; 396 } 397 } else if (os_strcmp(pos, "cred={") == 0) { 398 cred = wpa_config_read_cred(f, &line, cred_id++); 399 if (cred == NULL) { 400 wpa_printf(MSG_ERROR, "Line %d: failed to " 401 "parse cred block.", line); 402 errors++; 403 continue; 404 } 405 if (cred_head == NULL) { 406 cred_head = cred_tail = cred; 407 } else { 408 cred_tail->next = cred; 409 cred_tail = cred; 410 } 411#ifndef CONFIG_NO_CONFIG_BLOBS 412 } else if (os_strncmp(pos, "blob-base64-", 12) == 0) { 413 if (wpa_config_process_blob(config, f, &line, pos + 12) 414 < 0) { 415 wpa_printf(MSG_ERROR, "Line %d: failed to " 416 "process blob.", line); 417 errors++; 418 continue; 419 } 420#endif /* CONFIG_NO_CONFIG_BLOBS */ 421 } else if (wpa_config_process_global(config, pos, line) < 0) { 422 wpa_printf(MSG_ERROR, "Line %d: Invalid configuration " 423 "line '%s'.", line, pos); 424 errors++; 425 continue; 426 } 427 } 428 429 fclose(f); 430 431 config->ssid = head; 432 wpa_config_debug_dump_networks(config); 433 config->cred = cred_head; 434 435#ifndef WPA_IGNORE_CONFIG_ERRORS 436 if (errors) { 437 wpa_config_free(config); 438 config = NULL; 439 head = NULL; 440 } 441#endif /* WPA_IGNORE_CONFIG_ERRORS */ 442 443 return config; 444} 445 446 447#ifndef CONFIG_NO_CONFIG_WRITE 448 449static void write_str(FILE *f, const char *field, struct wpa_ssid *ssid) 450{ 451 char *value = wpa_config_get(ssid, field); 452 if (value == NULL) 453 return; 454 fprintf(f, "\t%s=%s\n", field, value); 455 os_free(value); 456} 457 458 459static void write_int(FILE *f, const char *field, int value, int def) 460{ 461 if (value == def) 462 return; 463 fprintf(f, "\t%s=%d\n", field, value); 464} 465 466 467static void write_bssid(FILE *f, struct wpa_ssid *ssid) 468{ 469 char *value = wpa_config_get(ssid, "bssid"); 470 if (value == NULL) 471 return; 472 fprintf(f, "\tbssid=%s\n", value); 473 os_free(value); 474} 475 476 477static void write_psk(FILE *f, struct wpa_ssid *ssid) 478{ 479 char *value = wpa_config_get(ssid, "psk"); 480 if (value == NULL) 481 return; 482 fprintf(f, "\tpsk=%s\n", value); 483 os_free(value); 484} 485 486 487static void write_proto(FILE *f, struct wpa_ssid *ssid) 488{ 489 char *value; 490 491 if (ssid->proto == DEFAULT_PROTO) 492 return; 493 494 value = wpa_config_get(ssid, "proto"); 495 if (value == NULL) 496 return; 497 if (value[0]) 498 fprintf(f, "\tproto=%s\n", value); 499 os_free(value); 500} 501 502 503static void write_key_mgmt(FILE *f, struct wpa_ssid *ssid) 504{ 505 char *value; 506 507 if (ssid->key_mgmt == DEFAULT_KEY_MGMT) 508 return; 509 510 value = wpa_config_get(ssid, "key_mgmt"); 511 if (value == NULL) 512 return; 513 if (value[0]) 514 fprintf(f, "\tkey_mgmt=%s\n", value); 515 os_free(value); 516} 517 518 519static void write_pairwise(FILE *f, struct wpa_ssid *ssid) 520{ 521 char *value; 522 523 if (ssid->pairwise_cipher == DEFAULT_PAIRWISE) 524 return; 525 526 value = wpa_config_get(ssid, "pairwise"); 527 if (value == NULL) 528 return; 529 if (value[0]) 530 fprintf(f, "\tpairwise=%s\n", value); 531 os_free(value); 532} 533 534 535static void write_group(FILE *f, struct wpa_ssid *ssid) 536{ 537 char *value; 538 539 if (ssid->group_cipher == DEFAULT_GROUP) 540 return; 541 542 value = wpa_config_get(ssid, "group"); 543 if (value == NULL) 544 return; 545 if (value[0]) 546 fprintf(f, "\tgroup=%s\n", value); 547 os_free(value); 548} 549 550 551static void write_auth_alg(FILE *f, struct wpa_ssid *ssid) 552{ 553 char *value; 554 555 if (ssid->auth_alg == 0) 556 return; 557 558 value = wpa_config_get(ssid, "auth_alg"); 559 if (value == NULL) 560 return; 561 if (value[0]) 562 fprintf(f, "\tauth_alg=%s\n", value); 563 os_free(value); 564} 565 566 567#ifdef IEEE8021X_EAPOL 568static void write_eap(FILE *f, struct wpa_ssid *ssid) 569{ 570 char *value; 571 572 value = wpa_config_get(ssid, "eap"); 573 if (value == NULL) 574 return; 575 576 if (value[0]) 577 fprintf(f, "\teap=%s\n", value); 578 os_free(value); 579} 580#endif /* IEEE8021X_EAPOL */ 581 582 583static void write_wep_key(FILE *f, int idx, struct wpa_ssid *ssid) 584{ 585 char field[20], *value; 586 int res; 587 588 res = os_snprintf(field, sizeof(field), "wep_key%d", idx); 589 if (res < 0 || (size_t) res >= sizeof(field)) 590 return; 591 value = wpa_config_get(ssid, field); 592 if (value) { 593 fprintf(f, "\t%s=%s\n", field, value); 594 os_free(value); 595 } 596} 597 598 599#ifdef CONFIG_P2P 600static void write_p2p_client_list(FILE *f, struct wpa_ssid *ssid) 601{ 602 char *value = wpa_config_get(ssid, "p2p_client_list"); 603 if (value == NULL) 604 return; 605 fprintf(f, "\tp2p_client_list=%s\n", value); 606 os_free(value); 607} 608#endif /* CONFIG_P2P */ 609 610 611static void wpa_config_write_network(FILE *f, struct wpa_ssid *ssid) 612{ 613 int i; 614 615#define STR(t) write_str(f, #t, ssid) 616#define INT(t) write_int(f, #t, ssid->t, 0) 617#define INTe(t) write_int(f, #t, ssid->eap.t, 0) 618#define INT_DEF(t, def) write_int(f, #t, ssid->t, def) 619#define INT_DEFe(t, def) write_int(f, #t, ssid->eap.t, def) 620 621 STR(ssid); 622 INT(scan_ssid); 623 write_bssid(f, ssid); 624 write_psk(f, ssid); 625 write_proto(f, ssid); 626 write_key_mgmt(f, ssid); 627 INT_DEF(bg_scan_period, DEFAULT_BG_SCAN_PERIOD); 628 write_pairwise(f, ssid); 629 write_group(f, ssid); 630 write_auth_alg(f, ssid); 631 STR(bgscan); 632 STR(autoscan); 633#ifdef IEEE8021X_EAPOL 634 write_eap(f, ssid); 635 STR(identity); 636 STR(anonymous_identity); 637 STR(password); 638 STR(ca_cert); 639 STR(ca_path); 640 STR(client_cert); 641 STR(private_key); 642 STR(private_key_passwd); 643 STR(dh_file); 644 STR(subject_match); 645 STR(altsubject_match); 646 STR(ca_cert2); 647 STR(ca_path2); 648 STR(client_cert2); 649 STR(private_key2); 650 STR(private_key2_passwd); 651 STR(dh_file2); 652 STR(subject_match2); 653 STR(altsubject_match2); 654 STR(phase1); 655 STR(phase2); 656 STR(pcsc); 657 STR(pin); 658 STR(engine_id); 659 STR(key_id); 660 STR(cert_id); 661 STR(ca_cert_id); 662 STR(key2_id); 663 STR(pin2); 664 STR(engine2_id); 665 STR(cert2_id); 666 STR(ca_cert2_id); 667 INTe(engine); 668 INTe(engine2); 669 INT_DEF(eapol_flags, DEFAULT_EAPOL_FLAGS); 670#endif /* IEEE8021X_EAPOL */ 671 for (i = 0; i < 4; i++) 672 write_wep_key(f, i, ssid); 673 INT(wep_tx_keyidx); 674 INT(priority); 675#ifdef IEEE8021X_EAPOL 676 INT_DEF(eap_workaround, DEFAULT_EAP_WORKAROUND); 677 STR(pac_file); 678 INT_DEFe(fragment_size, DEFAULT_FRAGMENT_SIZE); 679#endif /* IEEE8021X_EAPOL */ 680 INT(mode); 681 INT(frequency); 682 write_int(f, "proactive_key_caching", ssid->proactive_key_caching, -1); 683 INT(disabled); 684 INT(peerkey); 685#ifdef CONFIG_IEEE80211W 686 write_int(f, "ieee80211w", ssid->ieee80211w, 687 MGMT_FRAME_PROTECTION_DEFAULT); 688#endif /* CONFIG_IEEE80211W */ 689 STR(id_str); 690#ifdef CONFIG_P2P 691 write_p2p_client_list(f, ssid); 692#endif /* CONFIG_P2P */ 693 INT(dtim_period); 694 INT(beacon_int); 695 696#undef STR 697#undef INT 698#undef INT_DEF 699} 700 701 702static void wpa_config_write_cred(FILE *f, struct wpa_cred *cred) 703{ 704 if (cred->priority) 705 fprintf(f, "\tpriority=%d\n", cred->priority); 706 if (cred->pcsc) 707 fprintf(f, "\tpcsc=%d\n", cred->pcsc); 708 if (cred->realm) 709 fprintf(f, "\trealm=\"%s\"\n", cred->realm); 710 if (cred->username) 711 fprintf(f, "\tusername=\"%s\"\n", cred->username); 712 if (cred->password && cred->ext_password) 713 fprintf(f, "\tpassword=ext:%s\n", cred->password); 714 else if (cred->password) 715 fprintf(f, "\tpassword=\"%s\"\n", cred->password); 716 if (cred->ca_cert) 717 fprintf(f, "\tca_cert=\"%s\"\n", cred->ca_cert); 718 if (cred->client_cert) 719 fprintf(f, "\tclient_cert=\"%s\"\n", cred->client_cert); 720 if (cred->private_key) 721 fprintf(f, "\tprivate_key=\"%s\"\n", cred->private_key); 722 if (cred->private_key_passwd) 723 fprintf(f, "\tprivate_key_passwd=\"%s\"\n", 724 cred->private_key_passwd); 725 if (cred->imsi) 726 fprintf(f, "\timsi=\"%s\"\n", cred->imsi); 727 if (cred->milenage) 728 fprintf(f, "\tmilenage=\"%s\"\n", cred->milenage); 729 if (cred->domain) 730 fprintf(f, "\tdomain=\"%s\"\n", cred->domain); 731 if (cred->roaming_consortium_len) { 732 size_t i; 733 fprintf(f, "\troaming_consortium="); 734 for (i = 0; i < cred->roaming_consortium_len; i++) 735 fprintf(f, "%02x", cred->roaming_consortium[i]); 736 fprintf(f, "\n"); 737 } 738 if (cred->eap_method) { 739 const char *name; 740 name = eap_get_name(cred->eap_method[0].vendor, 741 cred->eap_method[0].method); 742 fprintf(f, "\teap=%s\n", name); 743 } 744 if (cred->phase1) 745 fprintf(f, "\tphase1=\"%s\"\n", cred->phase1); 746 if (cred->phase2) 747 fprintf(f, "\tphase2=\"%s\"\n", cred->phase2); 748 if (cred->excluded_ssid) { 749 size_t i, j; 750 for (i = 0; i < cred->num_excluded_ssid; i++) { 751 struct excluded_ssid *e = &cred->excluded_ssid[i]; 752 fprintf(f, "\texcluded_ssid="); 753 for (j = 0; j < e->ssid_len; j++) 754 fprintf(f, "%02x", e->ssid[j]); 755 fprintf(f, "\n"); 756 } 757 } 758} 759 760 761#ifndef CONFIG_NO_CONFIG_BLOBS 762static int wpa_config_write_blob(FILE *f, struct wpa_config_blob *blob) 763{ 764 unsigned char *encoded; 765 766 encoded = base64_encode(blob->data, blob->len, NULL); 767 if (encoded == NULL) 768 return -1; 769 770 fprintf(f, "\nblob-base64-%s={\n%s}\n", blob->name, encoded); 771 os_free(encoded); 772 return 0; 773} 774#endif /* CONFIG_NO_CONFIG_BLOBS */ 775 776 777static void write_global_bin(FILE *f, const char *field, 778 const struct wpabuf *val) 779{ 780 size_t i; 781 const u8 *pos; 782 783 if (val == NULL) 784 return; 785 786 fprintf(f, "%s=", field); 787 pos = wpabuf_head(val); 788 for (i = 0; i < wpabuf_len(val); i++) 789 fprintf(f, "%02X", *pos++); 790 fprintf(f, "\n"); 791} 792 793 794static void wpa_config_write_global(FILE *f, struct wpa_config *config) 795{ 796#ifdef CONFIG_CTRL_IFACE 797 if (config->ctrl_interface) 798 fprintf(f, "ctrl_interface=%s\n", config->ctrl_interface); 799 if (config->ctrl_interface_group) 800 fprintf(f, "ctrl_interface_group=%s\n", 801 config->ctrl_interface_group); 802#endif /* CONFIG_CTRL_IFACE */ 803 if (config->eapol_version != DEFAULT_EAPOL_VERSION) 804 fprintf(f, "eapol_version=%d\n", config->eapol_version); 805 if (config->ap_scan != DEFAULT_AP_SCAN) 806 fprintf(f, "ap_scan=%d\n", config->ap_scan); 807 if (config->disable_scan_offload) 808 fprintf(f, "disable_scan_offload=%d\n", 809 config->disable_scan_offload); 810 if (config->fast_reauth != DEFAULT_FAST_REAUTH) 811 fprintf(f, "fast_reauth=%d\n", config->fast_reauth); 812 if (config->opensc_engine_path) 813 fprintf(f, "opensc_engine_path=%s\n", 814 config->opensc_engine_path); 815 if (config->pkcs11_engine_path) 816 fprintf(f, "pkcs11_engine_path=%s\n", 817 config->pkcs11_engine_path); 818 if (config->pkcs11_module_path) 819 fprintf(f, "pkcs11_module_path=%s\n", 820 config->pkcs11_module_path); 821 if (config->pcsc_reader) 822 fprintf(f, "pcsc_reader=%s\n", config->pcsc_reader); 823 if (config->pcsc_pin) 824 fprintf(f, "pcsc_pin=%s\n", config->pcsc_pin); 825 if (config->driver_param) 826 fprintf(f, "driver_param=%s\n", config->driver_param); 827 if (config->dot11RSNAConfigPMKLifetime) 828 fprintf(f, "dot11RSNAConfigPMKLifetime=%d\n", 829 config->dot11RSNAConfigPMKLifetime); 830 if (config->dot11RSNAConfigPMKReauthThreshold) 831 fprintf(f, "dot11RSNAConfigPMKReauthThreshold=%d\n", 832 config->dot11RSNAConfigPMKReauthThreshold); 833 if (config->dot11RSNAConfigSATimeout) 834 fprintf(f, "dot11RSNAConfigSATimeout=%d\n", 835 config->dot11RSNAConfigSATimeout); 836 if (config->update_config) 837 fprintf(f, "update_config=%d\n", config->update_config); 838#ifdef CONFIG_WPS 839 if (!is_nil_uuid(config->uuid)) { 840 char buf[40]; 841 uuid_bin2str(config->uuid, buf, sizeof(buf)); 842 fprintf(f, "uuid=%s\n", buf); 843 } 844 if (config->device_name) 845 fprintf(f, "device_name=%s\n", config->device_name); 846 if (config->manufacturer) 847 fprintf(f, "manufacturer=%s\n", config->manufacturer); 848 if (config->model_name) 849 fprintf(f, "model_name=%s\n", config->model_name); 850 if (config->model_number) 851 fprintf(f, "model_number=%s\n", config->model_number); 852 if (config->serial_number) 853 fprintf(f, "serial_number=%s\n", config->serial_number); 854 { 855 char _buf[WPS_DEV_TYPE_BUFSIZE], *buf; 856 buf = wps_dev_type_bin2str(config->device_type, 857 _buf, sizeof(_buf)); 858 if (os_strcmp(buf, "0-00000000-0") != 0) 859 fprintf(f, "device_type=%s\n", buf); 860 } 861 if (WPA_GET_BE32(config->os_version)) 862 fprintf(f, "os_version=%08x\n", 863 WPA_GET_BE32(config->os_version)); 864 if (config->config_methods) 865 fprintf(f, "config_methods=%s\n", config->config_methods); 866 if (config->wps_cred_processing) 867 fprintf(f, "wps_cred_processing=%d\n", 868 config->wps_cred_processing); 869 if (config->wps_vendor_ext_m1) { 870 int i, len = wpabuf_len(config->wps_vendor_ext_m1); 871 const u8 *p = wpabuf_head_u8(config->wps_vendor_ext_m1); 872 if (len > 0) { 873 fprintf(f, "wps_vendor_ext_m1="); 874 for (i = 0; i < len; i++) 875 fprintf(f, "%02x", *p++); 876 fprintf(f, "\n"); 877 } 878 } 879#endif /* CONFIG_WPS */ 880#ifdef CONFIG_P2P 881 if (config->p2p_listen_reg_class) 882 fprintf(f, "p2p_listen_reg_class=%u\n", 883 config->p2p_listen_reg_class); 884 if (config->p2p_listen_channel) 885 fprintf(f, "p2p_listen_channel=%u\n", 886 config->p2p_listen_channel); 887 if (config->p2p_oper_reg_class) 888 fprintf(f, "p2p_oper_reg_class=%u\n", 889 config->p2p_oper_reg_class); 890 if (config->p2p_oper_channel) 891 fprintf(f, "p2p_oper_channel=%u\n", config->p2p_oper_channel); 892 if (config->p2p_go_intent != DEFAULT_P2P_GO_INTENT) 893 fprintf(f, "p2p_go_intent=%u\n", config->p2p_go_intent); 894 if (config->p2p_ssid_postfix) 895 fprintf(f, "p2p_ssid_postfix=%s\n", config->p2p_ssid_postfix); 896 if (config->persistent_reconnect) 897 fprintf(f, "persistent_reconnect=%u\n", 898 config->persistent_reconnect); 899 if (config->p2p_intra_bss != DEFAULT_P2P_INTRA_BSS) 900 fprintf(f, "p2p_intra_bss=%u\n", config->p2p_intra_bss); 901 if (config->p2p_group_idle) 902 fprintf(f, "p2p_group_idle=%u\n", config->p2p_group_idle); 903 if (config->p2p_pref_chan) { 904 unsigned int i; 905 fprintf(f, "p2p_pref_chan="); 906 for (i = 0; i < config->num_p2p_pref_chan; i++) { 907 fprintf(f, "%s%u:%u", i > 0 ? "," : "", 908 config->p2p_pref_chan[i].op_class, 909 config->p2p_pref_chan[i].chan); 910 } 911 fprintf(f, "\n"); 912 } 913 if (config->p2p_go_ht40) 914 fprintf(f, "p2p_go_ht40=%u\n", config->p2p_go_ht40); 915 if (config->p2p_disabled) 916 fprintf(f, "p2p_disabled=%u\n", config->p2p_disabled); 917 if (config->p2p_no_group_iface) 918 fprintf(f, "p2p_no_group_iface=%u\n", 919 config->p2p_no_group_iface); 920 if (config->p2p_ignore_shared_freq) 921 fprintf(f, "p2p_ignore_shared_freq=%u\n", 922 config->p2p_ignore_shared_freq); 923#endif /* CONFIG_P2P */ 924 if (config->country[0] && config->country[1]) { 925 fprintf(f, "country=%c%c\n", 926 config->country[0], config->country[1]); 927 } 928 if (config->bss_max_count != DEFAULT_BSS_MAX_COUNT) 929 fprintf(f, "bss_max_count=%u\n", config->bss_max_count); 930 if (config->bss_expiration_age != DEFAULT_BSS_EXPIRATION_AGE) 931 fprintf(f, "bss_expiration_age=%u\n", 932 config->bss_expiration_age); 933 if (config->bss_expiration_scan_count != 934 DEFAULT_BSS_EXPIRATION_SCAN_COUNT) 935 fprintf(f, "bss_expiration_scan_count=%u\n", 936 config->bss_expiration_scan_count); 937 if (config->filter_ssids) 938 fprintf(f, "filter_ssids=%d\n", config->filter_ssids); 939 if (config->max_num_sta != DEFAULT_MAX_NUM_STA) 940 fprintf(f, "max_num_sta=%u\n", config->max_num_sta); 941 if (config->disassoc_low_ack) 942 fprintf(f, "disassoc_low_ack=%u\n", config->disassoc_low_ack); 943#ifdef CONFIG_HS20 944 if (config->hs20) 945 fprintf(f, "hs20=1\n"); 946#endif /* CONFIG_HS20 */ 947#ifdef CONFIG_INTERWORKING 948 if (config->interworking) 949 fprintf(f, "interworking=%u\n", config->interworking); 950 if (!is_zero_ether_addr(config->hessid)) 951 fprintf(f, "hessid=" MACSTR "\n", MAC2STR(config->hessid)); 952 if (config->access_network_type != DEFAULT_ACCESS_NETWORK_TYPE) 953 fprintf(f, "access_network_type=%d\n", 954 config->access_network_type); 955#endif /* CONFIG_INTERWORKING */ 956 if (config->pbc_in_m1) 957 fprintf(f, "pbc_in_m1=%u\n", config->pbc_in_m1); 958 if (config->wps_nfc_pw_from_config) { 959 if (config->wps_nfc_dev_pw_id) 960 fprintf(f, "wps_nfc_dev_pw_id=%d\n", 961 config->wps_nfc_dev_pw_id); 962 write_global_bin(f, "wps_nfc_dh_pubkey", 963 config->wps_nfc_dh_pubkey); 964 write_global_bin(f, "wps_nfc_dh_privkey", 965 config->wps_nfc_dh_privkey); 966 write_global_bin(f, "wps_nfc_dev_pw", config->wps_nfc_dev_pw); 967 } 968 969 if (config->ext_password_backend) 970 fprintf(f, "ext_password_backend=%s\n", 971 config->ext_password_backend); 972 if (config->p2p_go_max_inactivity != DEFAULT_P2P_GO_MAX_INACTIVITY) 973 fprintf(f, "p2p_go_max_inactivity=%d\n", 974 config->p2p_go_max_inactivity); 975 if (config->auto_interworking) 976 fprintf(f, "auto_interworking=%d\n", 977 config->auto_interworking); 978 if (config->okc) 979 fprintf(f, "okc=%d\n", config->okc); 980 if (config->pmf) 981 fprintf(f, "pmf=%d\n", config->pmf); 982 if (config->dtim_period) 983 fprintf(f, "dtim_period=%d\n", config->dtim_period); 984 if (config->beacon_int) 985 fprintf(f, "beacon_int=%d\n", config->beacon_int); 986 987 if (config->sae_groups) { 988 int i; 989 fprintf(f, "sae_groups="); 990 for (i = 0; config->sae_groups[i] >= 0; i++) { 991 fprintf(f, "%s%d", i > 0 ? " " : "", 992 config->sae_groups[i]); 993 } 994 fprintf(f, "\n"); 995 } 996 997 if (config->ap_vendor_elements) { 998 int i, len = wpabuf_len(config->ap_vendor_elements); 999 const u8 *p = wpabuf_head_u8(config->ap_vendor_elements); 1000 if (len > 0) { 1001 fprintf(f, "ap_vendor_elements="); 1002 for (i = 0; i < len; i++) 1003 fprintf(f, "%02x", *p++); 1004 fprintf(f, "\n"); 1005 } 1006 } 1007} 1008 1009#endif /* CONFIG_NO_CONFIG_WRITE */ 1010 1011 1012int wpa_config_write(const char *name, struct wpa_config *config) 1013{ 1014#ifndef CONFIG_NO_CONFIG_WRITE 1015 FILE *f; 1016 struct wpa_ssid *ssid; 1017 struct wpa_cred *cred; 1018#ifndef CONFIG_NO_CONFIG_BLOBS 1019 struct wpa_config_blob *blob; 1020#endif /* CONFIG_NO_CONFIG_BLOBS */ 1021 int ret = 0; 1022 1023 wpa_printf(MSG_DEBUG, "Writing configuration file '%s'", name); 1024 1025 f = fopen(name, "w"); 1026 if (f == NULL) { 1027 wpa_printf(MSG_DEBUG, "Failed to open '%s' for writing", name); 1028 return -1; 1029 } 1030 1031 wpa_config_write_global(f, config); 1032 1033 for (cred = config->cred; cred; cred = cred->next) { 1034 fprintf(f, "\ncred={\n"); 1035 wpa_config_write_cred(f, cred); 1036 fprintf(f, "}\n"); 1037 } 1038 1039 for (ssid = config->ssid; ssid; ssid = ssid->next) { 1040 if (ssid->key_mgmt == WPA_KEY_MGMT_WPS || ssid->temporary) 1041 continue; /* do not save temporary networks */ 1042 if (wpa_key_mgmt_wpa_psk(ssid->key_mgmt) && !ssid->psk_set && 1043 !ssid->passphrase) 1044 continue; /* do not save invalid network */ 1045 fprintf(f, "\nnetwork={\n"); 1046 wpa_config_write_network(f, ssid); 1047 fprintf(f, "}\n"); 1048 } 1049 1050#ifndef CONFIG_NO_CONFIG_BLOBS 1051 for (blob = config->blobs; blob; blob = blob->next) { 1052 ret = wpa_config_write_blob(f, blob); 1053 if (ret) 1054 break; 1055 } 1056#endif /* CONFIG_NO_CONFIG_BLOBS */ 1057 1058 fclose(f); 1059 1060 wpa_printf(MSG_DEBUG, "Configuration file '%s' written %ssuccessfully", 1061 name, ret ? "un" : ""); 1062 return ret; 1063#else /* CONFIG_NO_CONFIG_WRITE */ 1064 return -1; 1065#endif /* CONFIG_NO_CONFIG_WRITE */ 1066} 1067