config_file.c revision 5605286c30e1701491bd3af974ae423727750edd 
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	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
211static 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
267static 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
323static 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
349struct 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
457static 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
467static 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
475static 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
485static 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
495static 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
511static 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
527static 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
543static 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
559static 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
576static 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
591static 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
609static 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
619static 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
634static 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	STR(scan_freq);
657#ifdef IEEE8021X_EAPOL
658	write_eap(f, ssid);
659	STR(identity);
660	STR(anonymous_identity);
661	STR(password);
662	STR(ca_cert);
663	STR(ca_path);
664	STR(client_cert);
665	STR(private_key);
666	STR(private_key_passwd);
667	STR(dh_file);
668	STR(subject_match);
669	STR(altsubject_match);
670	STR(ca_cert2);
671	STR(ca_path2);
672	STR(client_cert2);
673	STR(private_key2);
674	STR(private_key2_passwd);
675	STR(dh_file2);
676	STR(subject_match2);
677	STR(altsubject_match2);
678	STR(phase1);
679	STR(phase2);
680	STR(pcsc);
681	STR(pin);
682	STR(engine_id);
683	STR(key_id);
684	STR(cert_id);
685	STR(ca_cert_id);
686	STR(key2_id);
687	STR(pin2);
688	STR(engine2_id);
689	STR(cert2_id);
690	STR(ca_cert2_id);
691	INTe(engine);
692	INTe(engine2);
693	INT_DEF(eapol_flags, DEFAULT_EAPOL_FLAGS);
694#endif /* IEEE8021X_EAPOL */
695	for (i = 0; i < 4; i++)
696		write_wep_key(f, i, ssid);
697	INT(wep_tx_keyidx);
698	INT(priority);
699#ifdef IEEE8021X_EAPOL
700	INT_DEF(eap_workaround, DEFAULT_EAP_WORKAROUND);
701	STR(pac_file);
702	INT_DEFe(fragment_size, DEFAULT_FRAGMENT_SIZE);
703#endif /* IEEE8021X_EAPOL */
704	INT(mode);
705	INT(frequency);
706	write_int(f, "proactive_key_caching", ssid->proactive_key_caching, -1);
707	INT(disabled);
708	INT(peerkey);
709#ifdef CONFIG_IEEE80211W
710	write_int(f, "ieee80211w", ssid->ieee80211w,
711		  MGMT_FRAME_PROTECTION_DEFAULT);
712#endif /* CONFIG_IEEE80211W */
713	STR(id_str);
714#ifdef CONFIG_P2P
715	write_p2p_client_list(f, ssid);
716	write_psk_list(f, ssid);
717#endif /* CONFIG_P2P */
718	INT(dtim_period);
719	INT(beacon_int);
720
721#undef STR
722#undef INT
723#undef INT_DEF
724}
725
726
727static void wpa_config_write_cred(FILE *f, struct wpa_cred *cred)
728{
729	if (cred->priority)
730		fprintf(f, "\tpriority=%d\n", cred->priority);
731	if (cred->pcsc)
732		fprintf(f, "\tpcsc=%d\n", cred->pcsc);
733	if (cred->realm)
734		fprintf(f, "\trealm=\"%s\"\n", cred->realm);
735	if (cred->username)
736		fprintf(f, "\tusername=\"%s\"\n", cred->username);
737	if (cred->password && cred->ext_password)
738		fprintf(f, "\tpassword=ext:%s\n", cred->password);
739	else if (cred->password)
740		fprintf(f, "\tpassword=\"%s\"\n", cred->password);
741	if (cred->ca_cert)
742		fprintf(f, "\tca_cert=\"%s\"\n", cred->ca_cert);
743	if (cred->client_cert)
744		fprintf(f, "\tclient_cert=\"%s\"\n", cred->client_cert);
745	if (cred->private_key)
746		fprintf(f, "\tprivate_key=\"%s\"\n", cred->private_key);
747	if (cred->private_key_passwd)
748		fprintf(f, "\tprivate_key_passwd=\"%s\"\n",
749			cred->private_key_passwd);
750	if (cred->imsi)
751		fprintf(f, "\timsi=\"%s\"\n", cred->imsi);
752	if (cred->milenage)
753		fprintf(f, "\tmilenage=\"%s\"\n", cred->milenage);
754	if (cred->domain)
755		fprintf(f, "\tdomain=\"%s\"\n", cred->domain);
756	if (cred->roaming_consortium_len) {
757		size_t i;
758		fprintf(f, "\troaming_consortium=");
759		for (i = 0; i < cred->roaming_consortium_len; i++)
760			fprintf(f, "%02x", cred->roaming_consortium[i]);
761		fprintf(f, "\n");
762	}
763	if (cred->eap_method) {
764		const char *name;
765		name = eap_get_name(cred->eap_method[0].vendor,
766				    cred->eap_method[0].method);
767		fprintf(f, "\teap=%s\n", name);
768	}
769	if (cred->phase1)
770		fprintf(f, "\tphase1=\"%s\"\n", cred->phase1);
771	if (cred->phase2)
772		fprintf(f, "\tphase2=\"%s\"\n", cred->phase2);
773	if (cred->excluded_ssid) {
774		size_t i, j;
775		for (i = 0; i < cred->num_excluded_ssid; i++) {
776			struct excluded_ssid *e = &cred->excluded_ssid[i];
777			fprintf(f, "\texcluded_ssid=");
778			for (j = 0; j < e->ssid_len; j++)
779				fprintf(f, "%02x", e->ssid[j]);
780			fprintf(f, "\n");
781		}
782	}
783}
784
785
786#ifndef CONFIG_NO_CONFIG_BLOBS
787static int wpa_config_write_blob(FILE *f, struct wpa_config_blob *blob)
788{
789	unsigned char *encoded;
790
791	encoded = base64_encode(blob->data, blob->len, NULL);
792	if (encoded == NULL)
793		return -1;
794
795	fprintf(f, "\nblob-base64-%s={\n%s}\n", blob->name, encoded);
796	os_free(encoded);
797	return 0;
798}
799#endif /* CONFIG_NO_CONFIG_BLOBS */
800
801
802static void write_global_bin(FILE *f, const char *field,
803			     const struct wpabuf *val)
804{
805	size_t i;
806	const u8 *pos;
807
808	if (val == NULL)
809		return;
810
811	fprintf(f, "%s=", field);
812	pos = wpabuf_head(val);
813	for (i = 0; i < wpabuf_len(val); i++)
814		fprintf(f, "%02X", *pos++);
815	fprintf(f, "\n");
816}
817
818
819static void wpa_config_write_global(FILE *f, struct wpa_config *config)
820{
821#ifdef CONFIG_CTRL_IFACE
822	if (config->ctrl_interface)
823		fprintf(f, "ctrl_interface=%s\n", config->ctrl_interface);
824	if (config->ctrl_interface_group)
825		fprintf(f, "ctrl_interface_group=%s\n",
826			config->ctrl_interface_group);
827#endif /* CONFIG_CTRL_IFACE */
828	if (config->eapol_version != DEFAULT_EAPOL_VERSION)
829		fprintf(f, "eapol_version=%d\n", config->eapol_version);
830	if (config->ap_scan != DEFAULT_AP_SCAN)
831		fprintf(f, "ap_scan=%d\n", config->ap_scan);
832	if (config->disable_scan_offload)
833		fprintf(f, "disable_scan_offload=%d\n",
834			config->disable_scan_offload);
835	if (config->fast_reauth != DEFAULT_FAST_REAUTH)
836		fprintf(f, "fast_reauth=%d\n", config->fast_reauth);
837	if (config->opensc_engine_path)
838		fprintf(f, "opensc_engine_path=%s\n",
839			config->opensc_engine_path);
840	if (config->pkcs11_engine_path)
841		fprintf(f, "pkcs11_engine_path=%s\n",
842			config->pkcs11_engine_path);
843	if (config->pkcs11_module_path)
844		fprintf(f, "pkcs11_module_path=%s\n",
845			config->pkcs11_module_path);
846	if (config->pcsc_reader)
847		fprintf(f, "pcsc_reader=%s\n", config->pcsc_reader);
848	if (config->pcsc_pin)
849		fprintf(f, "pcsc_pin=%s\n", config->pcsc_pin);
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	{
880		char _buf[WPS_DEV_TYPE_BUFSIZE], *buf;
881		buf = wps_dev_type_bin2str(config->device_type,
882					   _buf, sizeof(_buf));
883		if (os_strcmp(buf, "0-00000000-0") != 0)
884			fprintf(f, "device_type=%s\n", buf);
885	}
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->config_methods)
890		fprintf(f, "config_methods=%s\n", config->config_methods);
891	if (config->wps_cred_processing)
892		fprintf(f, "wps_cred_processing=%d\n",
893			config->wps_cred_processing);
894	if (config->wps_vendor_ext_m1) {
895		int i, len = wpabuf_len(config->wps_vendor_ext_m1);
896		const u8 *p = wpabuf_head_u8(config->wps_vendor_ext_m1);
897		if (len > 0) {
898			fprintf(f, "wps_vendor_ext_m1=");
899			for (i = 0; i < len; i++)
900				fprintf(f, "%02x", *p++);
901			fprintf(f, "\n");
902		}
903	}
904#endif /* CONFIG_WPS */
905#ifdef CONFIG_P2P
906	if (config->p2p_listen_reg_class)
907		fprintf(f, "p2p_listen_reg_class=%u\n",
908			config->p2p_listen_reg_class);
909	if (config->p2p_listen_channel)
910		fprintf(f, "p2p_listen_channel=%u\n",
911			config->p2p_listen_channel);
912	if (config->p2p_oper_reg_class)
913		fprintf(f, "p2p_oper_reg_class=%u\n",
914			config->p2p_oper_reg_class);
915	if (config->p2p_oper_channel)
916		fprintf(f, "p2p_oper_channel=%u\n", config->p2p_oper_channel);
917	if (config->p2p_go_intent != DEFAULT_P2P_GO_INTENT)
918		fprintf(f, "p2p_go_intent=%u\n", config->p2p_go_intent);
919	if (config->p2p_ssid_postfix)
920		fprintf(f, "p2p_ssid_postfix=%s\n", config->p2p_ssid_postfix);
921	if (config->persistent_reconnect)
922		fprintf(f, "persistent_reconnect=%u\n",
923			config->persistent_reconnect);
924	if (config->p2p_intra_bss != DEFAULT_P2P_INTRA_BSS)
925		fprintf(f, "p2p_intra_bss=%u\n", config->p2p_intra_bss);
926	if (config->p2p_group_idle)
927		fprintf(f, "p2p_group_idle=%u\n", config->p2p_group_idle);
928	if (config->p2p_pref_chan) {
929		unsigned int i;
930		fprintf(f, "p2p_pref_chan=");
931		for (i = 0; i < config->num_p2p_pref_chan; i++) {
932			fprintf(f, "%s%u:%u", i > 0 ? "," : "",
933				config->p2p_pref_chan[i].op_class,
934				config->p2p_pref_chan[i].chan);
935		}
936		fprintf(f, "\n");
937	}
938	if (config->p2p_go_ht40)
939		fprintf(f, "p2p_go_ht40=%u\n", config->p2p_go_ht40);
940	if (config->p2p_disabled)
941		fprintf(f, "p2p_disabled=%u\n", config->p2p_disabled);
942	if (config->p2p_no_group_iface)
943		fprintf(f, "p2p_no_group_iface=%u\n",
944			config->p2p_no_group_iface);
945	if (config->p2p_ignore_shared_freq)
946		fprintf(f, "p2p_ignore_shared_freq=%u\n",
947			config->p2p_ignore_shared_freq);
948#endif /* CONFIG_P2P */
949	if (config->country[0] && config->country[1]) {
950		fprintf(f, "country=%c%c\n",
951			config->country[0], config->country[1]);
952	}
953	if (config->bss_max_count != DEFAULT_BSS_MAX_COUNT)
954		fprintf(f, "bss_max_count=%u\n", config->bss_max_count);
955	if (config->bss_expiration_age != DEFAULT_BSS_EXPIRATION_AGE)
956		fprintf(f, "bss_expiration_age=%u\n",
957			config->bss_expiration_age);
958	if (config->bss_expiration_scan_count !=
959	    DEFAULT_BSS_EXPIRATION_SCAN_COUNT)
960		fprintf(f, "bss_expiration_scan_count=%u\n",
961			config->bss_expiration_scan_count);
962	if (config->filter_ssids)
963		fprintf(f, "filter_ssids=%d\n", config->filter_ssids);
964	if (config->max_num_sta != DEFAULT_MAX_NUM_STA)
965		fprintf(f, "max_num_sta=%u\n", config->max_num_sta);
966	if (config->disassoc_low_ack)
967		fprintf(f, "disassoc_low_ack=%u\n", config->disassoc_low_ack);
968#ifdef CONFIG_HS20
969	if (config->hs20)
970		fprintf(f, "hs20=1\n");
971#endif /* CONFIG_HS20 */
972#ifdef CONFIG_INTERWORKING
973	if (config->interworking)
974		fprintf(f, "interworking=%u\n", config->interworking);
975	if (!is_zero_ether_addr(config->hessid))
976		fprintf(f, "hessid=" MACSTR "\n", MAC2STR(config->hessid));
977	if (config->access_network_type != DEFAULT_ACCESS_NETWORK_TYPE)
978		fprintf(f, "access_network_type=%d\n",
979			config->access_network_type);
980#endif /* CONFIG_INTERWORKING */
981	if (config->pbc_in_m1)
982		fprintf(f, "pbc_in_m1=%u\n", config->pbc_in_m1);
983	if (config->wps_nfc_pw_from_config) {
984		if (config->wps_nfc_dev_pw_id)
985			fprintf(f, "wps_nfc_dev_pw_id=%d\n",
986				config->wps_nfc_dev_pw_id);
987		write_global_bin(f, "wps_nfc_dh_pubkey",
988				 config->wps_nfc_dh_pubkey);
989		write_global_bin(f, "wps_nfc_dh_privkey",
990				 config->wps_nfc_dh_privkey);
991		write_global_bin(f, "wps_nfc_dev_pw", config->wps_nfc_dev_pw);
992	}
993
994	if (config->ext_password_backend)
995		fprintf(f, "ext_password_backend=%s\n",
996			config->ext_password_backend);
997	if (config->p2p_go_max_inactivity != DEFAULT_P2P_GO_MAX_INACTIVITY)
998		fprintf(f, "p2p_go_max_inactivity=%d\n",
999			config->p2p_go_max_inactivity);
1000	if (config->auto_interworking)
1001		fprintf(f, "auto_interworking=%d\n",
1002			config->auto_interworking);
1003	if (config->okc)
1004		fprintf(f, "okc=%d\n", config->okc);
1005	if (config->pmf)
1006		fprintf(f, "pmf=%d\n", config->pmf);
1007	if (config->dtim_period)
1008		fprintf(f, "dtim_period=%d\n", config->dtim_period);
1009	if (config->beacon_int)
1010		fprintf(f, "beacon_int=%d\n", config->beacon_int);
1011
1012	if (config->sae_groups) {
1013		int i;
1014		fprintf(f, "sae_groups=");
1015		for (i = 0; config->sae_groups[i] >= 0; i++) {
1016			fprintf(f, "%s%d", i > 0 ? " " : "",
1017				config->sae_groups[i]);
1018		}
1019		fprintf(f, "\n");
1020	}
1021
1022	if (config->ap_vendor_elements) {
1023		int i, len = wpabuf_len(config->ap_vendor_elements);
1024		const u8 *p = wpabuf_head_u8(config->ap_vendor_elements);
1025		if (len > 0) {
1026			fprintf(f, "ap_vendor_elements=");
1027			for (i = 0; i < len; i++)
1028				fprintf(f, "%02x", *p++);
1029			fprintf(f, "\n");
1030		}
1031	}
1032
1033	if (config->ignore_old_scan_res)
1034		fprintf(f, "ignore_old_scan_res=%d\n",
1035			config->ignore_old_scan_res);
1036
1037	if (config->freq_list && config->freq_list[0]) {
1038		int i;
1039		fprintf(f, "freq_list=");
1040		for (i = 0; config->freq_list[i]; i++) {
1041			fprintf(f, "%s%u", i > 0 ? " " : "",
1042				config->freq_list[i]);
1043		}
1044		fprintf(f, "\n");
1045	}
1046	if (config->scan_cur_freq != DEFAULT_SCAN_CUR_FREQ)
1047		fprintf(f, "scan_cur_freq=%d\n", config->scan_cur_freq);
1048
1049	if (config->sched_scan_interval)
1050		fprintf(f, "sched_scan_interval=%u\n",
1051			config->sched_scan_interval);
1052}
1053
1054#endif /* CONFIG_NO_CONFIG_WRITE */
1055
1056
1057int wpa_config_write(const char *name, struct wpa_config *config)
1058{
1059#ifndef CONFIG_NO_CONFIG_WRITE
1060	FILE *f;
1061	struct wpa_ssid *ssid;
1062	struct wpa_cred *cred;
1063#ifndef CONFIG_NO_CONFIG_BLOBS
1064	struct wpa_config_blob *blob;
1065#endif /* CONFIG_NO_CONFIG_BLOBS */
1066	int ret = 0;
1067
1068	wpa_printf(MSG_DEBUG, "Writing configuration file '%s'", name);
1069
1070	f = fopen(name, "w");
1071	if (f == NULL) {
1072		wpa_printf(MSG_DEBUG, "Failed to open '%s' for writing", name);
1073		return -1;
1074	}
1075
1076	wpa_config_write_global(f, config);
1077
1078	for (cred = config->cred; cred; cred = cred->next) {
1079		fprintf(f, "\ncred={\n");
1080		wpa_config_write_cred(f, cred);
1081		fprintf(f, "}\n");
1082	}
1083
1084	for (ssid = config->ssid; ssid; ssid = ssid->next) {
1085		if (ssid->key_mgmt == WPA_KEY_MGMT_WPS || ssid->temporary)
1086			continue; /* do not save temporary networks */
1087		if (wpa_key_mgmt_wpa_psk(ssid->key_mgmt) && !ssid->psk_set &&
1088		    !ssid->passphrase)
1089			continue; /* do not save invalid network */
1090		fprintf(f, "\nnetwork={\n");
1091		wpa_config_write_network(f, ssid);
1092		fprintf(f, "}\n");
1093	}
1094
1095#ifndef CONFIG_NO_CONFIG_BLOBS
1096	for (blob = config->blobs; blob; blob = blob->next) {
1097		ret = wpa_config_write_blob(f, blob);
1098		if (ret)
1099			break;
1100	}
1101#endif /* CONFIG_NO_CONFIG_BLOBS */
1102
1103	fclose(f);
1104
1105	wpa_printf(MSG_DEBUG, "Configuration file '%s' written %ssuccessfully",
1106		   name, ret ? "un" : "");
1107	return ret;
1108#else /* CONFIG_NO_CONFIG_WRITE */
1109	return -1;
1110#endif /* CONFIG_NO_CONFIG_WRITE */
1111}
1112