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