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
newline_terminated(const char * buf,size_t buflen)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
skip_line_end(FILE * stream)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 */
wpa_config_get_line(char * s,int size,FILE * stream,int * line,char ** _pos)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
wpa_config_validate_network(struct wpa_ssid * ssid,int line)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
wpa_config_read_network(FILE * f,int * line,int id)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
wpa_config_read_cred(FILE * f,int * line,int id)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
wpa_config_read_blob(FILE * f,int * line,const char * name)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
wpa_config_process_blob(struct wpa_config * config,FILE * f,int * line,char * bname)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
wpa_config_read(const char * name,struct wpa_config * cfgp)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
write_str(FILE * f,const char * field,struct wpa_ssid * ssid)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
write_int(FILE * f,const char * field,int value,int def)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
write_bssid(FILE * f,struct wpa_ssid * ssid)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
write_psk(FILE * f,struct wpa_ssid * ssid)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
write_proto(FILE * f,struct wpa_ssid * ssid)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
write_key_mgmt(FILE * f,struct wpa_ssid * ssid)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
write_pairwise(FILE * f,struct wpa_ssid * ssid)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
write_group(FILE * f,struct wpa_ssid * ssid)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
write_auth_alg(FILE * f,struct wpa_ssid * ssid)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
write_eap(FILE * f,struct wpa_ssid * ssid)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
write_wep_key(FILE * f,int idx,struct wpa_ssid * ssid)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
write_p2p_client_list(FILE * f,struct wpa_ssid * ssid)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
write_psk_list(FILE * f,struct wpa_ssid * ssid)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
wpa_config_write_network(FILE * f,struct wpa_ssid * ssid)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
wpa_config_write_cred(FILE * f,struct wpa_cred * cred)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
wpa_config_write_blob(FILE * f,struct wpa_config_blob * blob)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
write_global_bin(FILE * f,const char * field,const struct wpabuf * val)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
wpa_config_write_global(FILE * f,struct wpa_config * config)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 if (config->tdls_external_control)
1053 fprintf(f, "tdls_external_control=%u\n",
1054 config->tdls_external_control);
1055 }
1056
1057 #endif /* CONFIG_NO_CONFIG_WRITE */
1058
1059
wpa_config_write(const char * name,struct wpa_config * config)1060 int wpa_config_write(const char *name, struct wpa_config *config)
1061 {
1062 #ifndef CONFIG_NO_CONFIG_WRITE
1063 FILE *f;
1064 struct wpa_ssid *ssid;
1065 struct wpa_cred *cred;
1066 #ifndef CONFIG_NO_CONFIG_BLOBS
1067 struct wpa_config_blob *blob;
1068 #endif /* CONFIG_NO_CONFIG_BLOBS */
1069 int ret = 0;
1070
1071 wpa_printf(MSG_DEBUG, "Writing configuration file '%s'", name);
1072
1073 f = fopen(name, "w");
1074 if (f == NULL) {
1075 wpa_printf(MSG_DEBUG, "Failed to open '%s' for writing", name);
1076 return -1;
1077 }
1078
1079 wpa_config_write_global(f, config);
1080
1081 for (cred = config->cred; cred; cred = cred->next) {
1082 fprintf(f, "\ncred={\n");
1083 wpa_config_write_cred(f, cred);
1084 fprintf(f, "}\n");
1085 }
1086
1087 for (ssid = config->ssid; ssid; ssid = ssid->next) {
1088 if (ssid->key_mgmt == WPA_KEY_MGMT_WPS || ssid->temporary)
1089 continue; /* do not save temporary networks */
1090 if (wpa_key_mgmt_wpa_psk(ssid->key_mgmt) && !ssid->psk_set &&
1091 !ssid->passphrase)
1092 continue; /* do not save invalid network */
1093 fprintf(f, "\nnetwork={\n");
1094 wpa_config_write_network(f, ssid);
1095 fprintf(f, "}\n");
1096 }
1097
1098 #ifndef CONFIG_NO_CONFIG_BLOBS
1099 for (blob = config->blobs; blob; blob = blob->next) {
1100 ret = wpa_config_write_blob(f, blob);
1101 if (ret)
1102 break;
1103 }
1104 #endif /* CONFIG_NO_CONFIG_BLOBS */
1105
1106 fclose(f);
1107
1108 wpa_printf(MSG_DEBUG, "Configuration file '%s' written %ssuccessfully",
1109 name, ret ? "un" : "");
1110 return ret;
1111 #else /* CONFIG_NO_CONFIG_WRITE */
1112 return -1;
1113 #endif /* CONFIG_NO_CONFIG_WRITE */
1114 }
1115