1 /*
2 * WPA Supplicant / Configuration backend: text file
3 * Copyright (c) 2003-2008, Jouni Malinen <j@w1.fi>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 *
9 * Alternatively, this software may be distributed under the terms of BSD
10 * license.
11 *
12 * See README and COPYING for more details.
13 *
14 * This file implements a configuration backend for text files. All the
15 * configuration information is stored in a text file that uses a format
16 * described in the sample configuration file, wpa_supplicant.conf.
17 */
18
19 #include "includes.h"
20
21 #include "common.h"
22 #include "config.h"
23 #include "base64.h"
24 #include "uuid.h"
25 #include "eap_peer/eap_methods.h"
26
27
28 /**
29 * wpa_config_get_line - Read the next configuration file line
30 * @s: Buffer for the line
31 * @size: The buffer length
32 * @stream: File stream to read from
33 * @line: Pointer to a variable storing the file line number
34 * @_pos: Buffer for the pointer to the beginning of data on the text line or
35 * %NULL if not needed (returned value used instead)
36 * Returns: Pointer to the beginning of data on the text line or %NULL if no
37 * more text lines are available.
38 *
39 * This function reads the next non-empty line from the configuration file and
40 * removes comments. The returned string is guaranteed to be null-terminated.
41 */
wpa_config_get_line(char * s,int size,FILE * stream,int * line,char ** _pos)42 static char * wpa_config_get_line(char *s, int size, FILE *stream, int *line,
43 char **_pos)
44 {
45 char *pos, *end, *sstart;
46
47 while (fgets(s, size, stream)) {
48 (*line)++;
49 s[size - 1] = '\0';
50 pos = s;
51
52 /* Skip white space from the beginning of line. */
53 while (*pos == ' ' || *pos == '\t' || *pos == '\r')
54 pos++;
55
56 /* Skip comment lines and empty lines */
57 if (*pos == '#' || *pos == '\n' || *pos == '\0')
58 continue;
59
60 /*
61 * Remove # comments unless they are within a double quoted
62 * string.
63 */
64 sstart = os_strchr(pos, '"');
65 if (sstart)
66 sstart = os_strrchr(sstart + 1, '"');
67 if (!sstart)
68 sstart = pos;
69 end = os_strchr(sstart, '#');
70 if (end)
71 *end-- = '\0';
72 else
73 end = pos + os_strlen(pos) - 1;
74
75 /* Remove trailing white space. */
76 while (end > pos &&
77 (*end == '\n' || *end == ' ' || *end == '\t' ||
78 *end == '\r'))
79 *end-- = '\0';
80
81 if (*pos == '\0')
82 continue;
83
84 if (_pos)
85 *_pos = pos;
86 return pos;
87 }
88
89 if (_pos)
90 *_pos = NULL;
91 return NULL;
92 }
93
94
wpa_config_validate_network(struct wpa_ssid * ssid,int line)95 static int wpa_config_validate_network(struct wpa_ssid *ssid, int line)
96 {
97 int errors = 0;
98
99 if (ssid->passphrase) {
100 if (ssid->psk_set) {
101 wpa_printf(MSG_ERROR, "Line %d: both PSK and "
102 "passphrase configured.", line);
103 errors++;
104 }
105 wpa_config_update_psk(ssid);
106 }
107
108 if ((ssid->key_mgmt & (WPA_KEY_MGMT_PSK | WPA_KEY_MGMT_FT_PSK |
109 WPA_KEY_MGMT_PSK_SHA256)) &&
110 !ssid->psk_set) {
111 wpa_printf(MSG_ERROR, "Line %d: WPA-PSK accepted for key "
112 "management, but no PSK configured.", line);
113 errors++;
114 }
115
116 if ((ssid->group_cipher & WPA_CIPHER_CCMP) &&
117 !(ssid->pairwise_cipher & WPA_CIPHER_CCMP) &&
118 !(ssid->pairwise_cipher & WPA_CIPHER_NONE)) {
119 /* Group cipher cannot be stronger than the pairwise cipher. */
120 wpa_printf(MSG_DEBUG, "Line %d: removed CCMP from group cipher"
121 " list since it was not allowed for pairwise "
122 "cipher", line);
123 ssid->group_cipher &= ~WPA_CIPHER_CCMP;
124 }
125
126 return errors;
127 }
128
129
wpa_config_read_network(FILE * f,int * line,int id)130 static struct wpa_ssid * wpa_config_read_network(FILE *f, int *line, int id)
131 {
132 struct wpa_ssid *ssid;
133 int errors = 0, end = 0;
134 char buf[256], *pos, *pos2;
135
136 wpa_printf(MSG_MSGDUMP, "Line: %d - start of a new network block",
137 *line);
138 ssid = os_zalloc(sizeof(*ssid));
139 if (ssid == NULL)
140 return NULL;
141 ssid->id = id;
142
143 wpa_config_set_network_defaults(ssid);
144
145 while (wpa_config_get_line(buf, sizeof(buf), f, line, &pos)) {
146 if (os_strcmp(pos, "}") == 0) {
147 end = 1;
148 break;
149 }
150
151 pos2 = os_strchr(pos, '=');
152 if (pos2 == NULL) {
153 wpa_printf(MSG_ERROR, "Line %d: Invalid SSID line "
154 "'%s'.", *line, pos);
155 errors++;
156 continue;
157 }
158
159 *pos2++ = '\0';
160 if (*pos2 == '"') {
161 if (os_strchr(pos2 + 1, '"') == NULL) {
162 wpa_printf(MSG_ERROR, "Line %d: invalid "
163 "quotation '%s'.", *line, pos2);
164 errors++;
165 continue;
166 }
167 }
168
169 if (wpa_config_set(ssid, pos, pos2, *line) < 0)
170 errors++;
171 }
172
173 if (!end) {
174 wpa_printf(MSG_ERROR, "Line %d: network block was not "
175 "terminated properly.", *line);
176 errors++;
177 }
178
179 errors += wpa_config_validate_network(ssid, *line);
180
181 if (errors) {
182 wpa_config_free_ssid(ssid);
183 ssid = NULL;
184 }
185
186 return ssid;
187 }
188
189
190 #ifndef CONFIG_NO_CONFIG_BLOBS
wpa_config_read_blob(FILE * f,int * line,const char * name)191 static struct wpa_config_blob * wpa_config_read_blob(FILE *f, int *line,
192 const char *name)
193 {
194 struct wpa_config_blob *blob;
195 char buf[256], *pos;
196 unsigned char *encoded = NULL, *nencoded;
197 int end = 0;
198 size_t encoded_len = 0, len;
199
200 wpa_printf(MSG_MSGDUMP, "Line: %d - start of a new named blob '%s'",
201 *line, name);
202
203 while (wpa_config_get_line(buf, sizeof(buf), f, line, &pos)) {
204 if (os_strcmp(pos, "}") == 0) {
205 end = 1;
206 break;
207 }
208
209 len = os_strlen(pos);
210 nencoded = os_realloc(encoded, encoded_len + len);
211 if (nencoded == NULL) {
212 wpa_printf(MSG_ERROR, "Line %d: not enough memory for "
213 "blob", *line);
214 os_free(encoded);
215 return NULL;
216 }
217 encoded = nencoded;
218 os_memcpy(encoded + encoded_len, pos, len);
219 encoded_len += len;
220 }
221
222 if (!end) {
223 wpa_printf(MSG_ERROR, "Line %d: blob was not terminated "
224 "properly", *line);
225 os_free(encoded);
226 return NULL;
227 }
228
229 blob = os_zalloc(sizeof(*blob));
230 if (blob == NULL) {
231 os_free(encoded);
232 return NULL;
233 }
234 blob->name = os_strdup(name);
235 blob->data = base64_decode(encoded, encoded_len, &blob->len);
236 os_free(encoded);
237
238 if (blob->name == NULL || blob->data == NULL) {
239 wpa_config_free_blob(blob);
240 return NULL;
241 }
242
243 return blob;
244 }
245
246
wpa_config_process_blob(struct wpa_config * config,FILE * f,int * line,char * bname)247 static int wpa_config_process_blob(struct wpa_config *config, FILE *f,
248 int *line, char *bname)
249 {
250 char *name_end;
251 struct wpa_config_blob *blob;
252
253 name_end = os_strchr(bname, '=');
254 if (name_end == NULL) {
255 wpa_printf(MSG_ERROR, "Line %d: no blob name terminator",
256 *line);
257 return -1;
258 }
259 *name_end = '\0';
260
261 blob = wpa_config_read_blob(f, line, bname);
262 if (blob == NULL) {
263 wpa_printf(MSG_ERROR, "Line %d: failed to read blob %s",
264 *line, bname);
265 return -1;
266 }
267 wpa_config_set_blob(config, blob);
268 return 0;
269 }
270 #endif /* CONFIG_NO_CONFIG_BLOBS */
271
272
273 struct global_parse_data {
274 char *name;
275 int (*parser)(const struct global_parse_data *data,
276 struct wpa_config *config, int line, const char *value);
277 void *param1, *param2, *param3;
278 };
279
280
wpa_config_parse_int(const struct global_parse_data * data,struct wpa_config * config,int line,const char * pos)281 static int wpa_config_parse_int(const struct global_parse_data *data,
282 struct wpa_config *config, int line,
283 const char *pos)
284 {
285 int *dst;
286 dst = (int *) (((u8 *) config) + (long) data->param1);
287 *dst = atoi(pos);
288 wpa_printf(MSG_DEBUG, "%s=%d", data->name, *dst);
289
290 if (data->param2 && *dst < (long) data->param2) {
291 wpa_printf(MSG_ERROR, "Line %d: too small %s (value=%d "
292 "min_value=%ld)", line, data->name, *dst,
293 (long) data->param2);
294 *dst = (long) data->param2;
295 return -1;
296 }
297
298 if (data->param3 && *dst > (long) data->param3) {
299 wpa_printf(MSG_ERROR, "Line %d: too large %s (value=%d "
300 "max_value=%ld)", line, data->name, *dst,
301 (long) data->param3);
302 *dst = (long) data->param3;
303 return -1;
304 }
305
306 return 0;
307 }
308
309
wpa_config_parse_str(const struct global_parse_data * data,struct wpa_config * config,int line,const char * pos)310 static int wpa_config_parse_str(const struct global_parse_data *data,
311 struct wpa_config *config, int line,
312 const char *pos)
313 {
314 size_t len;
315 char **dst, *tmp;
316
317 len = os_strlen(pos);
318 if (data->param2 && len < (size_t) data->param2) {
319 wpa_printf(MSG_ERROR, "Line %d: too short %s (len=%lu "
320 "min_len=%ld)", line, data->name,
321 (unsigned long) len, (long) data->param2);
322 return -1;
323 }
324
325 if (data->param3 && len > (size_t) data->param3) {
326 wpa_printf(MSG_ERROR, "Line %d: too long %s (len=%lu "
327 "max_len=%ld)", line, data->name,
328 (unsigned long) len, (long) data->param3);
329 return -1;
330 }
331
332 tmp = os_strdup(pos);
333 if (tmp == NULL)
334 return -1;
335
336 dst = (char **) (((u8 *) config) + (long) data->param1);
337 os_free(*dst);
338 *dst = tmp;
339 wpa_printf(MSG_DEBUG, "%s='%s'", data->name, *dst);
340
341 return 0;
342 }
343
344
wpa_config_process_country(const struct global_parse_data * data,struct wpa_config * config,int line,const char * pos)345 static int wpa_config_process_country(const struct global_parse_data *data,
346 struct wpa_config *config, int line,
347 const char *pos)
348 {
349 if (!pos[0] || !pos[1]) {
350 wpa_printf(MSG_DEBUG, "Invalid country set");
351 return -1;
352 }
353 config->country[0] = pos[0];
354 config->country[1] = pos[1];
355 wpa_printf(MSG_DEBUG, "country='%c%c'",
356 config->country[0], config->country[1]);
357 return 0;
358 }
359
360
wpa_config_process_load_dynamic_eap(const struct global_parse_data * data,struct wpa_config * config,int line,const char * so)361 static int wpa_config_process_load_dynamic_eap(
362 const struct global_parse_data *data, struct wpa_config *config,
363 int line, const char *so)
364 {
365 int ret;
366 wpa_printf(MSG_DEBUG, "load_dynamic_eap=%s", so);
367 ret = eap_peer_method_load(so);
368 if (ret == -2) {
369 wpa_printf(MSG_DEBUG, "This EAP type was already loaded - not "
370 "reloading.");
371 } else if (ret) {
372 wpa_printf(MSG_ERROR, "Line %d: Failed to load dynamic EAP "
373 "method '%s'.", line, so);
374 return -1;
375 }
376
377 return 0;
378 }
379
380
381 #ifdef CONFIG_WPS
382
wpa_config_process_uuid(const struct global_parse_data * data,struct wpa_config * config,int line,const char * pos)383 static int wpa_config_process_uuid(const struct global_parse_data *data,
384 struct wpa_config *config, int line,
385 const char *pos)
386 {
387 char buf[40];
388 if (uuid_str2bin(pos, config->uuid)) {
389 wpa_printf(MSG_ERROR, "Line %d: invalid UUID", line);
390 return -1;
391 }
392 uuid_bin2str(config->uuid, buf, sizeof(buf));
393 wpa_printf(MSG_DEBUG, "uuid=%s", buf);
394 return 0;
395 }
396
397
wpa_config_process_os_version(const struct global_parse_data * data,struct wpa_config * config,int line,const char * pos)398 static int wpa_config_process_os_version(const struct global_parse_data *data,
399 struct wpa_config *config, int line,
400 const char *pos)
401 {
402 if (hexstr2bin(pos, config->os_version, 4)) {
403 wpa_printf(MSG_ERROR, "Line %d: invalid os_version", line);
404 return -1;
405 }
406 wpa_printf(MSG_DEBUG, "os_version=%08x",
407 WPA_GET_BE32(config->os_version));
408 return 0;
409 }
410
411 #endif /* CONFIG_WPS */
412
413
414 #ifdef OFFSET
415 #undef OFFSET
416 #endif /* OFFSET */
417 /* OFFSET: Get offset of a variable within the wpa_config structure */
418 #define OFFSET(v) ((void *) &((struct wpa_config *) 0)->v)
419
420 #define FUNC(f) #f, wpa_config_process_ ## f, OFFSET(f), NULL, NULL
421 #define FUNC_NO_VAR(f) #f, wpa_config_process_ ## f, NULL, NULL, NULL
422 #define _INT(f) #f, wpa_config_parse_int, OFFSET(f)
423 #define INT(f) _INT(f), NULL, NULL
424 #define INT_RANGE(f, min, max) _INT(f), (void *) min, (void *) max
425 #define _STR(f) #f, wpa_config_parse_str, OFFSET(f)
426 #define STR(f) _STR(f), NULL, NULL
427 #define STR_RANGE(f, min, max) _STR(f), (void *) min, (void *) max
428
429 static const struct global_parse_data global_fields[] = {
430 #ifdef CONFIG_CTRL_IFACE
431 { STR(ctrl_interface) },
432 { STR(ctrl_interface_group) } /* deprecated */,
433 #endif /* CONFIG_CTRL_IFACE */
434 { INT_RANGE(eapol_version, 1, 2) },
435 { INT(ap_scan) },
436 { INT(fast_reauth) },
437 #ifdef EAP_TLS_OPENSSL
438 { STR(opensc_engine_path) },
439 { STR(pkcs11_engine_path) },
440 { STR(pkcs11_module_path) },
441 #endif /* EAP_TLS_OPENSSL */
442 { STR(driver_param) },
443 { INT(dot11RSNAConfigPMKLifetime) },
444 { INT(dot11RSNAConfigPMKReauthThreshold) },
445 { INT(dot11RSNAConfigSATimeout) },
446 #ifndef CONFIG_NO_CONFIG_WRITE
447 { INT(update_config) },
448 #endif /* CONFIG_NO_CONFIG_WRITE */
449 { FUNC_NO_VAR(load_dynamic_eap) },
450 #ifdef CONFIG_WPS
451 { FUNC(uuid) },
452 { STR_RANGE(device_name, 0, 32) },
453 { STR_RANGE(manufacturer, 0, 64) },
454 { STR_RANGE(model_name, 0, 32) },
455 { STR_RANGE(model_number, 0, 32) },
456 { STR_RANGE(serial_number, 0, 32) },
457 { STR(device_type) },
458 { FUNC(os_version) },
459 { INT_RANGE(wps_cred_processing, 0, 2) },
460 #endif /* CONFIG_WPS */
461 { FUNC(country) }
462 };
463
464 #undef FUNC
465 #undef _INT
466 #undef INT
467 #undef INT_RANGE
468 #undef _STR
469 #undef STR
470 #undef STR_RANGE
471 #define NUM_GLOBAL_FIELDS (sizeof(global_fields) / sizeof(global_fields[0]))
472
473
wpa_config_process_global(struct wpa_config * config,char * pos,int line)474 static int wpa_config_process_global(struct wpa_config *config, char *pos,
475 int line)
476 {
477 size_t i;
478 int ret = 0;
479
480 for (i = 0; i < NUM_GLOBAL_FIELDS; i++) {
481 const struct global_parse_data *field = &global_fields[i];
482 size_t flen = os_strlen(field->name);
483 if (os_strncmp(pos, field->name, flen) != 0 ||
484 pos[flen] != '=')
485 continue;
486
487 if (field->parser(field, config, line, pos + flen + 1)) {
488 wpa_printf(MSG_ERROR, "Line %d: failed to "
489 "parse '%s'.", line, pos);
490 ret = -1;
491 }
492 break;
493 }
494 if (i == NUM_GLOBAL_FIELDS) {
495 wpa_printf(MSG_ERROR, "Line %d: unknown global field '%s'.",
496 line, pos);
497 ret = -1;
498 }
499
500 return ret;
501 }
502
503
wpa_config_read(const char * name)504 struct wpa_config * wpa_config_read(const char *name)
505 {
506 FILE *f;
507 char buf[256], *pos;
508 int errors = 0, line = 0;
509 struct wpa_ssid *ssid, *tail = NULL, *head = NULL;
510 struct wpa_config *config;
511 int id = 0;
512
513 config = wpa_config_alloc_empty(NULL, NULL);
514 if (config == NULL)
515 return NULL;
516 wpa_printf(MSG_DEBUG, "Reading configuration file '%s'", name);
517 f = fopen(name, "r");
518 if (f == NULL) {
519 os_free(config);
520 return NULL;
521 }
522
523 while (wpa_config_get_line(buf, sizeof(buf), f, &line, &pos)) {
524 if (os_strcmp(pos, "network={") == 0) {
525 ssid = wpa_config_read_network(f, &line, id++);
526 if (ssid == NULL) {
527 wpa_printf(MSG_ERROR, "Line %d: failed to "
528 "parse network block.", line);
529 #ifndef WPA_IGNORE_CONFIG_ERRORS
530 errors++;
531 #endif
532 continue;
533 }
534 if (head == NULL) {
535 head = tail = ssid;
536 } else {
537 tail->next = ssid;
538 tail = ssid;
539 }
540 if (wpa_config_add_prio_network(config, ssid)) {
541 wpa_printf(MSG_ERROR, "Line %d: failed to add "
542 "network block to priority list.",
543 line);
544 errors++;
545 continue;
546 }
547 #ifndef CONFIG_NO_CONFIG_BLOBS
548 } else if (os_strncmp(pos, "blob-base64-", 12) == 0) {
549 if (wpa_config_process_blob(config, f, &line, pos + 12)
550 < 0) {
551 errors++;
552 continue;
553 }
554 #endif /* CONFIG_NO_CONFIG_BLOBS */
555 } else if (wpa_config_process_global(config, pos, line) < 0) {
556 wpa_printf(MSG_ERROR, "Line %d: Invalid configuration "
557 "line '%s'.", line, pos);
558 errors++;
559 continue;
560 }
561 }
562
563 fclose(f);
564
565 config->ssid = head;
566 wpa_config_debug_dump_networks(config);
567
568 #ifndef WPA_IGNORE_CONFIG_ERRORS
569 if (errors) {
570 wpa_config_free(config);
571 config = NULL;
572 head = NULL;
573 }
574 #endif
575
576 return config;
577 }
578
579
580 #ifndef CONFIG_NO_CONFIG_WRITE
581
write_str(FILE * f,const char * field,struct wpa_ssid * ssid)582 static void write_str(FILE *f, const char *field, struct wpa_ssid *ssid)
583 {
584 char *value = wpa_config_get(ssid, field);
585 if (value == NULL)
586 return;
587 fprintf(f, "\t%s=%s\n", field, value);
588 os_free(value);
589 }
590
591
write_int(FILE * f,const char * field,int value,int def)592 static void write_int(FILE *f, const char *field, int value, int def)
593 {
594 if (value == def)
595 return;
596 fprintf(f, "\t%s=%d\n", field, value);
597 }
598
599
write_bssid(FILE * f,struct wpa_ssid * ssid)600 static void write_bssid(FILE *f, struct wpa_ssid *ssid)
601 {
602 char *value = wpa_config_get(ssid, "bssid");
603 if (value == NULL)
604 return;
605 fprintf(f, "\tbssid=%s\n", value);
606 os_free(value);
607 }
608
609
write_psk(FILE * f,struct wpa_ssid * ssid)610 static void write_psk(FILE *f, struct wpa_ssid *ssid)
611 {
612 char *value = wpa_config_get(ssid, "psk");
613 if (value == NULL)
614 return;
615 fprintf(f, "\tpsk=%s\n", value);
616 os_free(value);
617 }
618
619
write_proto(FILE * f,struct wpa_ssid * ssid)620 static void write_proto(FILE *f, struct wpa_ssid *ssid)
621 {
622 char *value;
623
624 if (ssid->proto == DEFAULT_PROTO)
625 return;
626
627 value = wpa_config_get(ssid, "proto");
628 if (value == NULL)
629 return;
630 if (value[0])
631 fprintf(f, "\tproto=%s\n", value);
632 os_free(value);
633 }
634
635
write_key_mgmt(FILE * f,struct wpa_ssid * ssid)636 static void write_key_mgmt(FILE *f, struct wpa_ssid *ssid)
637 {
638 char *value;
639
640 if (ssid->key_mgmt == DEFAULT_KEY_MGMT)
641 return;
642
643 value = wpa_config_get(ssid, "key_mgmt");
644 if (value == NULL)
645 return;
646 if (value[0])
647 fprintf(f, "\tkey_mgmt=%s\n", value);
648 os_free(value);
649 }
650
651
write_pairwise(FILE * f,struct wpa_ssid * ssid)652 static void write_pairwise(FILE *f, struct wpa_ssid *ssid)
653 {
654 char *value;
655
656 if (ssid->pairwise_cipher == DEFAULT_PAIRWISE)
657 return;
658
659 value = wpa_config_get(ssid, "pairwise");
660 if (value == NULL)
661 return;
662 if (value[0])
663 fprintf(f, "\tpairwise=%s\n", value);
664 os_free(value);
665 }
666
667
write_group(FILE * f,struct wpa_ssid * ssid)668 static void write_group(FILE *f, struct wpa_ssid *ssid)
669 {
670 char *value;
671
672 if (ssid->group_cipher == DEFAULT_GROUP)
673 return;
674
675 value = wpa_config_get(ssid, "group");
676 if (value == NULL)
677 return;
678 if (value[0])
679 fprintf(f, "\tgroup=%s\n", value);
680 os_free(value);
681 }
682
683
write_auth_alg(FILE * f,struct wpa_ssid * ssid)684 static void write_auth_alg(FILE *f, struct wpa_ssid *ssid)
685 {
686 char *value;
687
688 if (ssid->auth_alg == 0)
689 return;
690
691 value = wpa_config_get(ssid, "auth_alg");
692 if (value == NULL)
693 return;
694 if (value[0])
695 fprintf(f, "\tauth_alg=%s\n", value);
696 os_free(value);
697 }
698
699
700 #ifdef IEEE8021X_EAPOL
write_eap(FILE * f,struct wpa_ssid * ssid)701 static void write_eap(FILE *f, struct wpa_ssid *ssid)
702 {
703 char *value;
704
705 value = wpa_config_get(ssid, "eap");
706 if (value == NULL)
707 return;
708
709 if (value[0])
710 fprintf(f, "\teap=%s\n", value);
711 os_free(value);
712 }
713 #endif /* IEEE8021X_EAPOL */
714
715
write_wep_key(FILE * f,int idx,struct wpa_ssid * ssid)716 static void write_wep_key(FILE *f, int idx, struct wpa_ssid *ssid)
717 {
718 char field[20], *value;
719 int res;
720
721 res = os_snprintf(field, sizeof(field), "wep_key%d", idx);
722 if (res < 0 || (size_t) res >= sizeof(field))
723 return;
724 value = wpa_config_get(ssid, field);
725 if (value) {
726 fprintf(f, "\t%s=%s\n", field, value);
727 os_free(value);
728 }
729 }
730
731
wpa_config_write_network(FILE * f,struct wpa_ssid * ssid)732 static void wpa_config_write_network(FILE *f, struct wpa_ssid *ssid)
733 {
734 int i;
735
736 #define STR(t) write_str(f, #t, ssid)
737 #define INT(t) write_int(f, #t, ssid->t, 0)
738 #define INTe(t) write_int(f, #t, ssid->eap.t, 0)
739 #define INT_DEF(t, def) write_int(f, #t, ssid->t, def)
740 #define INT_DEFe(t, def) write_int(f, #t, ssid->eap.t, def)
741
742 STR(ssid);
743 INT(scan_ssid);
744 write_bssid(f, ssid);
745 write_psk(f, ssid);
746 write_proto(f, ssid);
747 write_key_mgmt(f, ssid);
748 write_pairwise(f, ssid);
749 write_group(f, ssid);
750 write_auth_alg(f, ssid);
751 #ifdef IEEE8021X_EAPOL
752 write_eap(f, ssid);
753 STR(identity);
754 STR(anonymous_identity);
755 STR(password);
756 STR(ca_cert);
757 STR(ca_path);
758 STR(client_cert);
759 STR(private_key);
760 STR(private_key_passwd);
761 STR(dh_file);
762 STR(subject_match);
763 STR(altsubject_match);
764 STR(ca_cert2);
765 STR(ca_path2);
766 STR(client_cert2);
767 STR(private_key2);
768 STR(private_key2_passwd);
769 STR(dh_file2);
770 STR(subject_match2);
771 STR(altsubject_match2);
772 STR(phase1);
773 STR(phase2);
774 STR(pcsc);
775 STR(pin);
776 STR(engine_id);
777 STR(key_id);
778 STR(cert_id);
779 STR(ca_cert_id);
780 STR(key2_id);
781 STR(pin2);
782 STR(engine2_id);
783 STR(cert2_id);
784 STR(ca_cert2_id);
785 INTe(engine);
786 INTe(engine2);
787 INT_DEF(eapol_flags, DEFAULT_EAPOL_FLAGS);
788 #endif /* IEEE8021X_EAPOL */
789 for (i = 0; i < 4; i++)
790 write_wep_key(f, i, ssid);
791 INT(wep_tx_keyidx);
792 INT(priority);
793 #ifdef IEEE8021X_EAPOL
794 INT_DEF(eap_workaround, DEFAULT_EAP_WORKAROUND);
795 STR(pac_file);
796 INT_DEFe(fragment_size, DEFAULT_FRAGMENT_SIZE);
797 #endif /* IEEE8021X_EAPOL */
798 INT(mode);
799 INT(proactive_key_caching);
800 INT(disabled);
801 INT(peerkey);
802 #ifdef CONFIG_IEEE80211W
803 INT(ieee80211w);
804 #endif /* CONFIG_IEEE80211W */
805 STR(id_str);
806
807 #undef STR
808 #undef INT
809 #undef INT_DEF
810 }
811
812
813 #ifndef CONFIG_NO_CONFIG_BLOBS
wpa_config_write_blob(FILE * f,struct wpa_config_blob * blob)814 static int wpa_config_write_blob(FILE *f, struct wpa_config_blob *blob)
815 {
816 unsigned char *encoded;
817
818 encoded = base64_encode(blob->data, blob->len, NULL);
819 if (encoded == NULL)
820 return -1;
821
822 fprintf(f, "\nblob-base64-%s={\n%s}\n", blob->name, encoded);
823 os_free(encoded);
824 return 0;
825 }
826 #endif /* CONFIG_NO_CONFIG_BLOBS */
827
828
wpa_config_write_global(FILE * f,struct wpa_config * config)829 static void wpa_config_write_global(FILE *f, struct wpa_config *config)
830 {
831 #ifdef CONFIG_CTRL_IFACE
832 if (config->ctrl_interface)
833 fprintf(f, "ctrl_interface=%s\n", config->ctrl_interface);
834 if (config->ctrl_interface_group)
835 fprintf(f, "ctrl_interface_group=%s\n",
836 config->ctrl_interface_group);
837 #endif /* CONFIG_CTRL_IFACE */
838 if (config->eapol_version != DEFAULT_EAPOL_VERSION)
839 fprintf(f, "eapol_version=%d\n", config->eapol_version);
840 if (config->ap_scan != DEFAULT_AP_SCAN)
841 fprintf(f, "ap_scan=%d\n", config->ap_scan);
842 if (config->fast_reauth != DEFAULT_FAST_REAUTH)
843 fprintf(f, "fast_reauth=%d\n", config->fast_reauth);
844 #ifdef EAP_TLS_OPENSSL
845 if (config->opensc_engine_path)
846 fprintf(f, "opensc_engine_path=%s\n",
847 config->opensc_engine_path);
848 if (config->pkcs11_engine_path)
849 fprintf(f, "pkcs11_engine_path=%s\n",
850 config->pkcs11_engine_path);
851 if (config->pkcs11_module_path)
852 fprintf(f, "pkcs11_module_path=%s\n",
853 config->pkcs11_module_path);
854 #endif /* EAP_TLS_OPENSSL */
855 if (config->driver_param)
856 fprintf(f, "driver_param=%s\n", config->driver_param);
857 if (config->dot11RSNAConfigPMKLifetime)
858 fprintf(f, "dot11RSNAConfigPMKLifetime=%d\n",
859 config->dot11RSNAConfigPMKLifetime);
860 if (config->dot11RSNAConfigPMKReauthThreshold)
861 fprintf(f, "dot11RSNAConfigPMKReauthThreshold=%d\n",
862 config->dot11RSNAConfigPMKReauthThreshold);
863 if (config->dot11RSNAConfigSATimeout)
864 fprintf(f, "dot11RSNAConfigSATimeout=%d\n",
865 config->dot11RSNAConfigSATimeout);
866 if (config->update_config)
867 fprintf(f, "update_config=%d\n", config->update_config);
868 #ifdef CONFIG_WPS
869 if (!is_nil_uuid(config->uuid)) {
870 char buf[40];
871 uuid_bin2str(config->uuid, buf, sizeof(buf));
872 fprintf(f, "uuid=%s\n", buf);
873 }
874 if (config->device_name)
875 fprintf(f, "device_name=%s\n", config->device_name);
876 if (config->manufacturer)
877 fprintf(f, "manufacturer=%s\n", config->manufacturer);
878 if (config->model_name)
879 fprintf(f, "model_name=%s\n", config->model_name);
880 if (config->model_number)
881 fprintf(f, "model_number=%s\n", config->model_number);
882 if (config->serial_number)
883 fprintf(f, "serial_number=%s\n", config->serial_number);
884 if (config->device_type)
885 fprintf(f, "device_type=%s\n", config->device_type);
886 if (WPA_GET_BE32(config->os_version))
887 fprintf(f, "os_version=%08x\n",
888 WPA_GET_BE32(config->os_version));
889 if (config->wps_cred_processing)
890 fprintf(f, "wps_cred_processing=%d\n",
891 config->wps_cred_processing);
892 #endif /* CONFIG_WPS */
893 if (config->country[0] && config->country[1]) {
894 fprintf(f, "country=%c%c\n",
895 config->country[0], config->country[1]);
896 }
897 }
898
899 #endif /* CONFIG_NO_CONFIG_WRITE */
900
901
wpa_config_write(const char * name,struct wpa_config * config)902 int wpa_config_write(const char *name, struct wpa_config *config)
903 {
904 #ifndef CONFIG_NO_CONFIG_WRITE
905 FILE *f;
906 struct wpa_ssid *ssid;
907 #ifndef CONFIG_NO_CONFIG_BLOBS
908 struct wpa_config_blob *blob;
909 #endif /* CONFIG_NO_CONFIG_BLOBS */
910 int ret = 0;
911
912 wpa_printf(MSG_DEBUG, "Writing configuration file '%s'", name);
913
914 f = fopen(name, "w");
915 if (f == NULL) {
916 wpa_printf(MSG_DEBUG, "Failed to open '%s' for writing", name);
917 return -1;
918 }
919
920 wpa_config_write_global(f, config);
921
922 for (ssid = config->ssid; ssid; ssid = ssid->next) {
923 if (ssid->key_mgmt == WPA_KEY_MGMT_WPS)
924 continue; /* do not save temporary WPS networks */
925 fprintf(f, "\nnetwork={\n");
926 wpa_config_write_network(f, ssid);
927 fprintf(f, "}\n");
928 }
929
930 #ifndef CONFIG_NO_CONFIG_BLOBS
931 for (blob = config->blobs; blob; blob = blob->next) {
932 ret = wpa_config_write_blob(f, blob);
933 if (ret)
934 break;
935 }
936 #endif /* CONFIG_NO_CONFIG_BLOBS */
937
938 fclose(f);
939
940 wpa_printf(MSG_DEBUG, "Configuration file '%s' written %ssuccessfully",
941 name, ret ? "un" : "");
942 return ret;
943 #else /* CONFIG_NO_CONFIG_WRITE */
944 return -1;
945 #endif /* CONFIG_NO_CONFIG_WRITE */
946 }
947