config_file.c revision 214734 
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 */
42static 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
95static 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
130static 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
191static 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
247static 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
273struct 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
281static 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
310static 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
345static 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
361static 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
383static 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
398static 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
429static 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	{ STR(opensc_engine_path) },
438	{ STR(pkcs11_engine_path) },
439	{ STR(pkcs11_module_path) },
440	{ STR(driver_param) },
441	{ INT(dot11RSNAConfigPMKLifetime) },
442	{ INT(dot11RSNAConfigPMKReauthThreshold) },
443	{ INT(dot11RSNAConfigSATimeout) },
444#ifndef CONFIG_NO_CONFIG_WRITE
445	{ INT(update_config) },
446#endif /* CONFIG_NO_CONFIG_WRITE */
447	{ FUNC_NO_VAR(load_dynamic_eap) },
448#ifdef CONFIG_WPS
449	{ FUNC(uuid) },
450	{ STR_RANGE(device_name, 0, 32) },
451	{ STR_RANGE(manufacturer, 0, 64) },
452	{ STR_RANGE(model_name, 0, 32) },
453	{ STR_RANGE(model_number, 0, 32) },
454	{ STR_RANGE(serial_number, 0, 32) },
455	{ STR(device_type) },
456	{ FUNC(os_version) },
457	{ STR(config_methods) },
458	{ INT_RANGE(wps_cred_processing, 0, 2) },
459#endif /* CONFIG_WPS */
460	{ FUNC(country) },
461	{ INT(bss_max_count) },
462	{ INT_RANGE(filter_ssids, 0, 1) }
463};
464
465#undef FUNC
466#undef _INT
467#undef INT
468#undef INT_RANGE
469#undef _STR
470#undef STR
471#undef STR_RANGE
472#define NUM_GLOBAL_FIELDS (sizeof(global_fields) / sizeof(global_fields[0]))
473
474
475static int wpa_config_process_global(struct wpa_config *config, char *pos,
476				     int line)
477{
478	size_t i;
479	int ret = 0;
480
481	for (i = 0; i < NUM_GLOBAL_FIELDS; i++) {
482		const struct global_parse_data *field = &global_fields[i];
483		size_t flen = os_strlen(field->name);
484		if (os_strncmp(pos, field->name, flen) != 0 ||
485		    pos[flen] != '=')
486			continue;
487
488		if (field->parser(field, config, line, pos + flen + 1)) {
489			wpa_printf(MSG_ERROR, "Line %d: failed to "
490				   "parse '%s'.", line, pos);
491			ret = -1;
492		}
493		break;
494	}
495	if (i == NUM_GLOBAL_FIELDS) {
496		wpa_printf(MSG_ERROR, "Line %d: unknown global field '%s'.",
497			   line, pos);
498		ret = -1;
499	}
500
501	return ret;
502}
503
504
505struct wpa_config * wpa_config_read(const char *name)
506{
507	FILE *f;
508	char buf[256], *pos;
509	int errors = 0, line = 0;
510	struct wpa_ssid *ssid, *tail = NULL, *head = NULL;
511	struct wpa_config *config;
512	int id = 0;
513
514	config = wpa_config_alloc_empty(NULL, NULL);
515	if (config == NULL)
516		return NULL;
517	wpa_printf(MSG_DEBUG, "Reading configuration file '%s'", name);
518	f = fopen(name, "r");
519	if (f == NULL) {
520		os_free(config);
521		return NULL;
522	}
523
524	while (wpa_config_get_line(buf, sizeof(buf), f, &line, &pos)) {
525		if (os_strcmp(pos, "network={") == 0) {
526			ssid = wpa_config_read_network(f, &line, id++);
527			if (ssid == NULL) {
528				wpa_printf(MSG_ERROR, "Line %d: failed to "
529					   "parse network block.", line);
530				errors++;
531				continue;
532			}
533			if (head == NULL) {
534				head = tail = ssid;
535			} else {
536				tail->next = ssid;
537				tail = ssid;
538			}
539			if (wpa_config_add_prio_network(config, ssid)) {
540				wpa_printf(MSG_ERROR, "Line %d: failed to add "
541					   "network block to priority list.",
542					   line);
543				errors++;
544				continue;
545			}
546#ifndef CONFIG_NO_CONFIG_BLOBS
547		} else if (os_strncmp(pos, "blob-base64-", 12) == 0) {
548			if (wpa_config_process_blob(config, f, &line, pos + 12)
549			    < 0) {
550				errors++;
551				continue;
552			}
553#endif /* CONFIG_NO_CONFIG_BLOBS */
554		} else if (wpa_config_process_global(config, pos, line) < 0) {
555			wpa_printf(MSG_ERROR, "Line %d: Invalid configuration "
556				   "line '%s'.", line, pos);
557			errors++;
558			continue;
559		}
560	}
561
562	fclose(f);
563
564	config->ssid = head;
565	wpa_config_debug_dump_networks(config);
566
567	if (errors) {
568		wpa_config_free(config);
569		config = NULL;
570		head = NULL;
571	}
572
573	return config;
574}
575
576
577#ifndef CONFIG_NO_CONFIG_WRITE
578
579static void write_str(FILE *f, const char *field, struct wpa_ssid *ssid)
580{
581	char *value = wpa_config_get(ssid, field);
582	if (value == NULL)
583		return;
584	fprintf(f, "\t%s=%s\n", field, value);
585	os_free(value);
586}
587
588
589static void write_int(FILE *f, const char *field, int value, int def)
590{
591	if (value == def)
592		return;
593	fprintf(f, "\t%s=%d\n", field, value);
594}
595
596
597static void write_bssid(FILE *f, struct wpa_ssid *ssid)
598{
599	char *value = wpa_config_get(ssid, "bssid");
600	if (value == NULL)
601		return;
602	fprintf(f, "\tbssid=%s\n", value);
603	os_free(value);
604}
605
606
607static void write_psk(FILE *f, struct wpa_ssid *ssid)
608{
609	char *value = wpa_config_get(ssid, "psk");
610	if (value == NULL)
611		return;
612	fprintf(f, "\tpsk=%s\n", value);
613	os_free(value);
614}
615
616
617static void write_proto(FILE *f, struct wpa_ssid *ssid)
618{
619	char *value;
620
621	if (ssid->proto == DEFAULT_PROTO)
622		return;
623
624	value = wpa_config_get(ssid, "proto");
625	if (value == NULL)
626		return;
627	if (value[0])
628		fprintf(f, "\tproto=%s\n", value);
629	os_free(value);
630}
631
632
633static void write_key_mgmt(FILE *f, struct wpa_ssid *ssid)
634{
635	char *value;
636
637	if (ssid->key_mgmt == DEFAULT_KEY_MGMT)
638		return;
639
640	value = wpa_config_get(ssid, "key_mgmt");
641	if (value == NULL)
642		return;
643	if (value[0])
644		fprintf(f, "\tkey_mgmt=%s\n", value);
645	os_free(value);
646}
647
648
649static void write_pairwise(FILE *f, struct wpa_ssid *ssid)
650{
651	char *value;
652
653	if (ssid->pairwise_cipher == DEFAULT_PAIRWISE)
654		return;
655
656	value = wpa_config_get(ssid, "pairwise");
657	if (value == NULL)
658		return;
659	if (value[0])
660		fprintf(f, "\tpairwise=%s\n", value);
661	os_free(value);
662}
663
664
665static void write_group(FILE *f, struct wpa_ssid *ssid)
666{
667	char *value;
668
669	if (ssid->group_cipher == DEFAULT_GROUP)
670		return;
671
672	value = wpa_config_get(ssid, "group");
673	if (value == NULL)
674		return;
675	if (value[0])
676		fprintf(f, "\tgroup=%s\n", value);
677	os_free(value);
678}
679
680
681static void write_auth_alg(FILE *f, struct wpa_ssid *ssid)
682{
683	char *value;
684
685	if (ssid->auth_alg == 0)
686		return;
687
688	value = wpa_config_get(ssid, "auth_alg");
689	if (value == NULL)
690		return;
691	if (value[0])
692		fprintf(f, "\tauth_alg=%s\n", value);
693	os_free(value);
694}
695
696
697#ifdef IEEE8021X_EAPOL
698static void write_eap(FILE *f, struct wpa_ssid *ssid)
699{
700	char *value;
701
702	value = wpa_config_get(ssid, "eap");
703	if (value == NULL)
704		return;
705
706	if (value[0])
707		fprintf(f, "\teap=%s\n", value);
708	os_free(value);
709}
710#endif /* IEEE8021X_EAPOL */
711
712
713static void write_wep_key(FILE *f, int idx, struct wpa_ssid *ssid)
714{
715	char field[20], *value;
716	int res;
717
718	res = os_snprintf(field, sizeof(field), "wep_key%d", idx);
719	if (res < 0 || (size_t) res >= sizeof(field))
720		return;
721	value = wpa_config_get(ssid, field);
722	if (value) {
723		fprintf(f, "\t%s=%s\n", field, value);
724		os_free(value);
725	}
726}
727
728
729static void wpa_config_write_network(FILE *f, struct wpa_ssid *ssid)
730{
731	int i;
732
733#define STR(t) write_str(f, #t, ssid)
734#define INT(t) write_int(f, #t, ssid->t, 0)
735#define INTe(t) write_int(f, #t, ssid->eap.t, 0)
736#define INT_DEF(t, def) write_int(f, #t, ssid->t, def)
737#define INT_DEFe(t, def) write_int(f, #t, ssid->eap.t, def)
738
739	STR(ssid);
740	INT(scan_ssid);
741	write_bssid(f, ssid);
742	write_psk(f, ssid);
743	write_proto(f, ssid);
744	write_key_mgmt(f, ssid);
745	write_pairwise(f, ssid);
746	write_group(f, ssid);
747	write_auth_alg(f, ssid);
748#ifdef IEEE8021X_EAPOL
749	write_eap(f, ssid);
750	STR(identity);
751	STR(anonymous_identity);
752	STR(password);
753	STR(ca_cert);
754	STR(ca_path);
755	STR(client_cert);
756	STR(private_key);
757	STR(private_key_passwd);
758	STR(dh_file);
759	STR(subject_match);
760	STR(altsubject_match);
761	STR(ca_cert2);
762	STR(ca_path2);
763	STR(client_cert2);
764	STR(private_key2);
765	STR(private_key2_passwd);
766	STR(dh_file2);
767	STR(subject_match2);
768	STR(altsubject_match2);
769	STR(phase1);
770	STR(phase2);
771	STR(pcsc);
772	STR(pin);
773	STR(engine_id);
774	STR(key_id);
775	STR(cert_id);
776	STR(ca_cert_id);
777	STR(key2_id);
778	STR(pin2);
779	STR(engine2_id);
780	STR(cert2_id);
781	STR(ca_cert2_id);
782	INTe(engine);
783	INTe(engine2);
784	INT_DEF(eapol_flags, DEFAULT_EAPOL_FLAGS);
785#endif /* IEEE8021X_EAPOL */
786	for (i = 0; i < 4; i++)
787		write_wep_key(f, i, ssid);
788	INT(wep_tx_keyidx);
789	INT(priority);
790#ifdef IEEE8021X_EAPOL
791	INT_DEF(eap_workaround, DEFAULT_EAP_WORKAROUND);
792	STR(pac_file);
793	INT_DEFe(fragment_size, DEFAULT_FRAGMENT_SIZE);
794#endif /* IEEE8021X_EAPOL */
795	INT(mode);
796	INT(proactive_key_caching);
797	INT(disabled);
798	INT(peerkey);
799#ifdef CONFIG_IEEE80211W
800	INT(ieee80211w);
801#endif /* CONFIG_IEEE80211W */
802	STR(id_str);
803
804#undef STR
805#undef INT
806#undef INT_DEF
807}
808
809
810#ifndef CONFIG_NO_CONFIG_BLOBS
811static int wpa_config_write_blob(FILE *f, struct wpa_config_blob *blob)
812{
813	unsigned char *encoded;
814
815	encoded = base64_encode(blob->data, blob->len, NULL);
816	if (encoded == NULL)
817		return -1;
818
819	fprintf(f, "\nblob-base64-%s={\n%s}\n", blob->name, encoded);
820	os_free(encoded);
821	return 0;
822}
823#endif /* CONFIG_NO_CONFIG_BLOBS */
824
825
826static void wpa_config_write_global(FILE *f, struct wpa_config *config)
827{
828#ifdef CONFIG_CTRL_IFACE
829	if (config->ctrl_interface)
830		fprintf(f, "ctrl_interface=%s\n", config->ctrl_interface);
831	if (config->ctrl_interface_group)
832		fprintf(f, "ctrl_interface_group=%s\n",
833			config->ctrl_interface_group);
834#endif /* CONFIG_CTRL_IFACE */
835	if (config->eapol_version != DEFAULT_EAPOL_VERSION)
836		fprintf(f, "eapol_version=%d\n", config->eapol_version);
837	if (config->ap_scan != DEFAULT_AP_SCAN)
838		fprintf(f, "ap_scan=%d\n", config->ap_scan);
839	if (config->fast_reauth != DEFAULT_FAST_REAUTH)
840		fprintf(f, "fast_reauth=%d\n", config->fast_reauth);
841	if (config->opensc_engine_path)
842		fprintf(f, "opensc_engine_path=%s\n",
843			config->opensc_engine_path);
844	if (config->pkcs11_engine_path)
845		fprintf(f, "pkcs11_engine_path=%s\n",
846			config->pkcs11_engine_path);
847	if (config->pkcs11_module_path)
848		fprintf(f, "pkcs11_module_path=%s\n",
849			config->pkcs11_module_path);
850	if (config->driver_param)
851		fprintf(f, "driver_param=%s\n", config->driver_param);
852	if (config->dot11RSNAConfigPMKLifetime)
853		fprintf(f, "dot11RSNAConfigPMKLifetime=%d\n",
854			config->dot11RSNAConfigPMKLifetime);
855	if (config->dot11RSNAConfigPMKReauthThreshold)
856		fprintf(f, "dot11RSNAConfigPMKReauthThreshold=%d\n",
857			config->dot11RSNAConfigPMKReauthThreshold);
858	if (config->dot11RSNAConfigSATimeout)
859		fprintf(f, "dot11RSNAConfigSATimeout=%d\n",
860			config->dot11RSNAConfigSATimeout);
861	if (config->update_config)
862		fprintf(f, "update_config=%d\n", config->update_config);
863#ifdef CONFIG_WPS
864	if (!is_nil_uuid(config->uuid)) {
865		char buf[40];
866		uuid_bin2str(config->uuid, buf, sizeof(buf));
867		fprintf(f, "uuid=%s\n", buf);
868	}
869	if (config->device_name)
870		fprintf(f, "device_name=%s\n", config->device_name);
871	if (config->manufacturer)
872		fprintf(f, "manufacturer=%s\n", config->manufacturer);
873	if (config->model_name)
874		fprintf(f, "model_name=%s\n", config->model_name);
875	if (config->model_number)
876		fprintf(f, "model_number=%s\n", config->model_number);
877	if (config->serial_number)
878		fprintf(f, "serial_number=%s\n", config->serial_number);
879	if (config->device_type)
880		fprintf(f, "device_type=%s\n", config->device_type);
881	if (WPA_GET_BE32(config->os_version))
882		fprintf(f, "os_version=%08x\n",
883			WPA_GET_BE32(config->os_version));
884	if (config->config_methods)
885		fprintf(f, "config_methods=%s\n", config->config_methods);
886	if (config->wps_cred_processing)
887		fprintf(f, "wps_cred_processing=%d\n",
888			config->wps_cred_processing);
889#endif /* CONFIG_WPS */
890	if (config->country[0] && config->country[1]) {
891		fprintf(f, "country=%c%c\n",
892			config->country[0], config->country[1]);
893	}
894	if (config->bss_max_count != DEFAULT_BSS_MAX_COUNT)
895		fprintf(f, "bss_max_count=%u\n", config->bss_max_count);
896	if (config->filter_ssids)
897		fprintf(f, "filter_ssids=%d\n", config->filter_ssids);
898}
899
900#endif /* CONFIG_NO_CONFIG_WRITE */
901
902
903int wpa_config_write(const char *name, struct wpa_config *config)
904{
905#ifndef CONFIG_NO_CONFIG_WRITE
906	FILE *f;
907	struct wpa_ssid *ssid;
908#ifndef CONFIG_NO_CONFIG_BLOBS
909	struct wpa_config_blob *blob;
910#endif /* CONFIG_NO_CONFIG_BLOBS */
911	int ret = 0;
912
913	wpa_printf(MSG_DEBUG, "Writing configuration file '%s'", name);
914
915	f = fopen(name, "w");
916	if (f == NULL) {
917		wpa_printf(MSG_DEBUG, "Failed to open '%s' for writing", name);
918		return -1;
919	}
920
921	wpa_config_write_global(f, config);
922
923	for (ssid = config->ssid; ssid; ssid = ssid->next) {
924		if (ssid->key_mgmt == WPA_KEY_MGMT_WPS)
925			continue; /* do not save temporary WPS networks */
926		fprintf(f, "\nnetwork={\n");
927		wpa_config_write_network(f, ssid);
928		fprintf(f, "}\n");
929	}
930
931#ifndef CONFIG_NO_CONFIG_BLOBS
932	for (blob = config->blobs; blob; blob = blob->next) {
933		ret = wpa_config_write_blob(f, blob);
934		if (ret)
935			break;
936	}
937#endif /* CONFIG_NO_CONFIG_BLOBS */
938
939	fclose(f);
940
941	wpa_printf(MSG_DEBUG, "Configuration file '%s' written %ssuccessfully",
942		   name, ret ? "un" : "");
943	return ret;
944#else /* CONFIG_NO_CONFIG_WRITE */
945	return -1;
946#endif /* CONFIG_NO_CONFIG_WRITE */
947}
948