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kernel - TMPFS - Stabilization pass, fix rename, symlink issues
[dragonfly.git] / contrib / wpa_supplicant / wpa_supplicant / config.c
blob9a7937417df1bca62e5ecac62fd5c52669abb593
1 /*
2 * WPA Supplicant / Configuration parser and common functions
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
15 #include "includes.h"
16
17 #include "common.h"
18 #include "wpa.h"
19 #include "sha1.h"
20 #include "eap_peer/eap.h"
21 #include "config.h"
22
23
24 #if !defined(CONFIG_CTRL_IFACE) && defined(CONFIG_NO_CONFIG_WRITE)
25 #define NO_CONFIG_WRITE
26 #endif
27
28 /*
29 * Structure for network configuration parsing. This data is used to implement
30 * a generic parser for each network block variable. The table of configuration
31 * variables is defined below in this file (ssid_fields[]).
32 */
33 struct parse_data {
34 /* Configuration variable name */
35 char *name;
36
37 /* Parser function for this variable */
38 int (*parser)(const struct parse_data *data, struct wpa_ssid *ssid,
39 int line, const char *value);
40
41 #ifndef NO_CONFIG_WRITE
42 /* Writer function (i.e., to get the variable in text format from
43 * internal presentation). */
44 char * (*writer)(const struct parse_data *data, struct wpa_ssid *ssid);
45 #endif /* NO_CONFIG_WRITE */
46
47 /* Variable specific parameters for the parser. */
48 void *param1, *param2, *param3, *param4;
49
50 /* 0 = this variable can be included in debug output and ctrl_iface
51 * 1 = this variable contains key/private data and it must not be
52 * included in debug output unless explicitly requested. In
53 * addition, this variable will not be readable through the
54 * ctrl_iface.
55 */
56 int key_data;
57 };
58
59
60 static char * wpa_config_parse_string(const char *value, size_t *len)
61 {
62 if (*value == '"') {
63 const char *pos;
64 char *str;
65 value++;
66 pos = os_strrchr(value, '"');
67 if (pos == NULL || pos[1] != '\0')
68 return NULL;
69 *len = pos - value;
70 str = os_malloc(*len + 1);
71 if (str == NULL)
72 return NULL;
73 os_memcpy(str, value, *len);
74 str[*len] = '\0';
75 return str;
76 } else {
77 u8 *str;
78 size_t tlen, hlen = os_strlen(value);
79 if (hlen & 1)
80 return NULL;
81 tlen = hlen / 2;
82 str = os_malloc(tlen + 1);
83 if (str == NULL)
84 return NULL;
85 if (hexstr2bin(value, str, tlen)) {
86 os_free(str);
87 return NULL;
88 }
89 str[tlen] = '\0';
90 *len = tlen;
91 return (char *) str;
92 }
93 }
94
95
96 static int wpa_config_parse_str(const struct parse_data *data,
97 struct wpa_ssid *ssid,
98 int line, const char *value)
99 {
100 size_t res_len, *dst_len;
101 char **dst, *tmp;
102
103 if (os_strcmp(value, "NULL") == 0) {
104 wpa_printf(MSG_DEBUG, "Unset configuration string '%s'",
105 data->name);
106 tmp = NULL;
107 res_len = 0;
108 goto set;
109 }
110
111 tmp = wpa_config_parse_string(value, &res_len);
112 if (tmp == NULL) {
113 wpa_printf(MSG_ERROR, "Line %d: failed to parse %s '%s'.",
114 line, data->name,
115 data->key_data ? "[KEY DATA REMOVED]" : value);
116 return -1;
117 }
118
119 if (data->key_data) {
120 wpa_hexdump_ascii_key(MSG_MSGDUMP, data->name,
121 (u8 *) tmp, res_len);
122 } else {
123 wpa_hexdump_ascii(MSG_MSGDUMP, data->name,
124 (u8 *) tmp, res_len);
125 }
126
127 if (data->param3 && res_len < (size_t) data->param3) {
128 wpa_printf(MSG_ERROR, "Line %d: too short %s (len=%lu "
129 "min_len=%ld)", line, data->name,
130 (unsigned long) res_len, (long) data->param3);
131 os_free(tmp);
132 return -1;
133 }
134
135 if (data->param4 && res_len > (size_t) data->param4) {
136 wpa_printf(MSG_ERROR, "Line %d: too long %s (len=%lu "
137 "max_len=%ld)", line, data->name,
138 (unsigned long) res_len, (long) data->param4);
139 os_free(tmp);
140 return -1;
141 }
142
143 set:
144 dst = (char **) (((u8 *) ssid) + (long) data->param1);
145 dst_len = (size_t *) (((u8 *) ssid) + (long) data->param2);
146 os_free(*dst);
147 *dst = tmp;
148 if (data->param2)
149 *dst_len = res_len;
150
151 return 0;
152 }
153
154
155 #ifndef NO_CONFIG_WRITE
156 static int is_hex(const u8 *data, size_t len)
157 {
158 size_t i;
159
160 for (i = 0; i < len; i++) {
161 if (data[i] < 32 || data[i] >= 127)
162 return 1;
163 }
164 return 0;
165 }
166
167
168 static char * wpa_config_write_string_ascii(const u8 *value, size_t len)
169 {
170 char *buf;
171
172 buf = os_malloc(len + 3);
173 if (buf == NULL)
174 return NULL;
175 buf[0] = '"';
176 os_memcpy(buf + 1, value, len);
177 buf[len + 1] = '"';
178 buf[len + 2] = '\0';
179
180 return buf;
181 }
182
183
184 static char * wpa_config_write_string_hex(const u8 *value, size_t len)
185 {
186 char *buf;
187
188 buf = os_zalloc(2 * len + 1);
189 if (buf == NULL)
190 return NULL;
191 wpa_snprintf_hex(buf, 2 * len + 1, value, len);
192
193 return buf;
194 }
195
196
197 static char * wpa_config_write_string(const u8 *value, size_t len)
198 {
199 if (value == NULL)
200 return NULL;
201
202 if (is_hex(value, len))
203 return wpa_config_write_string_hex(value, len);
204 else
205 return wpa_config_write_string_ascii(value, len);
206 }
207
208
209 static char * wpa_config_write_str(const struct parse_data *data,
210 struct wpa_ssid *ssid)
211 {
212 size_t len;
213 char **src;
214
215 src = (char **) (((u8 *) ssid) + (long) data->param1);
216 if (*src == NULL)
217 return NULL;
218
219 if (data->param2)
220 len = *((size_t *) (((u8 *) ssid) + (long) data->param2));
221 else
222 len = os_strlen(*src);
223
224 return wpa_config_write_string((const u8 *) *src, len);
225 }
226 #endif /* NO_CONFIG_WRITE */
227
228
229 static int wpa_config_parse_int(const struct parse_data *data,
230 struct wpa_ssid *ssid,
231 int line, const char *value)
232 {
233 int *dst;
234
235 dst = (int *) (((u8 *) ssid) + (long) data->param1);
236 *dst = atoi(value);
237 wpa_printf(MSG_MSGDUMP, "%s=%d (0x%x)", data->name, *dst, *dst);
238
239 if (data->param3 && *dst < (long) data->param3) {
240 wpa_printf(MSG_ERROR, "Line %d: too small %s (value=%d "
241 "min_value=%ld)", line, data->name, *dst,
242 (long) data->param3);
243 *dst = (long) data->param3;
244 return -1;
245 }
246
247 if (data->param4 && *dst > (long) data->param4) {
248 wpa_printf(MSG_ERROR, "Line %d: too large %s (value=%d "
249 "max_value=%ld)", line, data->name, *dst,
250 (long) data->param4);
251 *dst = (long) data->param4;
252 return -1;
253 }
254
255 return 0;
256 }
257
258
259 #ifndef NO_CONFIG_WRITE
260 static char * wpa_config_write_int(const struct parse_data *data,
261 struct wpa_ssid *ssid)
262 {
263 int *src, res;
264 char *value;
265
266 src = (int *) (((u8 *) ssid) + (long) data->param1);
267
268 value = os_malloc(20);
269 if (value == NULL)
270 return NULL;
271 res = os_snprintf(value, 20, "%d", *src);
272 if (res < 0 || res >= 20) {
273 os_free(value);
274 return NULL;
275 }
276 value[20 - 1] = '\0';
277 return value;
278 }
279 #endif /* NO_CONFIG_WRITE */
280
281
282 static int wpa_config_parse_bssid(const struct parse_data *data,
283 struct wpa_ssid *ssid, int line,
284 const char *value)
285 {
286 if (hwaddr_aton(value, ssid->bssid)) {
287 wpa_printf(MSG_ERROR, "Line %d: Invalid BSSID '%s'.",
288 line, value);
289 return -1;
290 }
291 ssid->bssid_set = 1;
292 wpa_hexdump(MSG_MSGDUMP, "BSSID", ssid->bssid, ETH_ALEN);
293 return 0;
294 }
295
296
297 #ifndef NO_CONFIG_WRITE
298 static char * wpa_config_write_bssid(const struct parse_data *data,
299 struct wpa_ssid *ssid)
300 {
301 char *value;
302 int res;
303
304 if (!ssid->bssid_set)
305 return NULL;
306
307 value = os_malloc(20);
308 if (value == NULL)
309 return NULL;
310 res = os_snprintf(value, 20, MACSTR, MAC2STR(ssid->bssid));
311 if (res < 0 || res >= 20) {
312 os_free(value);
313 return NULL;
314 }
315 value[20 - 1] = '\0';
316 return value;
317 }
318 #endif /* NO_CONFIG_WRITE */
319
320
321 static int wpa_config_parse_psk(const struct parse_data *data,
322 struct wpa_ssid *ssid, int line,
323 const char *value)
324 {
325 if (*value == '"') {
326 #ifndef CONFIG_NO_PBKDF2
327 const char *pos;
328 size_t len;
329
330 value++;
331 pos = os_strrchr(value, '"');
332 if (pos)
333 len = pos - value;
334 else
335 len = os_strlen(value);
336 if (len < 8 || len > 63) {
337 wpa_printf(MSG_ERROR, "Line %d: Invalid passphrase "
338 "length %lu (expected: 8..63) '%s'.",
339 line, (unsigned long) len, value);
340 return -1;
341 }
342 wpa_hexdump_ascii_key(MSG_MSGDUMP, "PSK (ASCII passphrase)",
343 (u8 *) value, len);
344 if (ssid->passphrase && os_strlen(ssid->passphrase) == len &&
345 os_memcmp(ssid->passphrase, value, len) == 0)
346 return 0;
347 ssid->psk_set = 0;
348 os_free(ssid->passphrase);
349 ssid->passphrase = os_malloc(len + 1);
350 if (ssid->passphrase == NULL)
351 return -1;
352 os_memcpy(ssid->passphrase, value, len);
353 ssid->passphrase[len] = '\0';
354 return 0;
355 #else /* CONFIG_NO_PBKDF2 */
356 wpa_printf(MSG_ERROR, "Line %d: ASCII passphrase not "
357 "supported.", line);
358 return -1;
359 #endif /* CONFIG_NO_PBKDF2 */
360 }
361
362 if (hexstr2bin(value, ssid->psk, PMK_LEN) ||
363 value[PMK_LEN * 2] != '\0') {
364 wpa_printf(MSG_ERROR, "Line %d: Invalid PSK '%s'.",
365 line, value);
366 return -1;
367 }
368
369 os_free(ssid->passphrase);
370 ssid->passphrase = NULL;
371
372 ssid->psk_set = 1;
373 wpa_hexdump_key(MSG_MSGDUMP, "PSK", ssid->psk, PMK_LEN);
374 return 0;
375 }
376
377
378 #ifndef NO_CONFIG_WRITE
379 static char * wpa_config_write_psk(const struct parse_data *data,
380 struct wpa_ssid *ssid)
381 {
382 if (ssid->passphrase)
383 return wpa_config_write_string_ascii(
384 (const u8 *) ssid->passphrase,
385 os_strlen(ssid->passphrase));
386
387 if (ssid->psk_set)
388 return wpa_config_write_string_hex(ssid->psk, PMK_LEN);
389
390 return NULL;
391 }
392 #endif /* NO_CONFIG_WRITE */
393
394
395 static int wpa_config_parse_proto(const struct parse_data *data,
396 struct wpa_ssid *ssid, int line,
397 const char *value)
398 {
399 int val = 0, last, errors = 0;
400 char *start, *end, *buf;
401
402 buf = os_strdup(value);
403 if (buf == NULL)
404 return -1;
405 start = buf;
406
407 while (*start != '\0') {
408 while (*start == ' ' || *start == '\t')
409 start++;
410 if (*start == '\0')
411 break;
412 end = start;
413 while (*end != ' ' && *end != '\t' && *end != '\0')
414 end++;
415 last = *end == '\0';
416 *end = '\0';
417 if (os_strcmp(start, "WPA") == 0)
418 val |= WPA_PROTO_WPA;
419 else if (os_strcmp(start, "RSN") == 0 ||
420 os_strcmp(start, "WPA2") == 0)
421 val |= WPA_PROTO_RSN;
422 else {
423 wpa_printf(MSG_ERROR, "Line %d: invalid proto '%s'",
424 line, start);
425 errors++;
426 }
427
428 if (last)
429 break;
430 start = end + 1;
431 }
432 os_free(buf);
433
434 if (val == 0) {
435 wpa_printf(MSG_ERROR,
436 "Line %d: no proto values configured.", line);
437 errors++;
438 }
439
440 wpa_printf(MSG_MSGDUMP, "proto: 0x%x", val);
441 ssid->proto = val;
442 return errors ? -1 : 0;
443 }
444
445
446 #ifndef NO_CONFIG_WRITE
447 static char * wpa_config_write_proto(const struct parse_data *data,
448 struct wpa_ssid *ssid)
449 {
450 int first = 1, ret;
451 char *buf, *pos, *end;
452
453 pos = buf = os_zalloc(10);
454 if (buf == NULL)
455 return NULL;
456 end = buf + 10;
457
458 if (ssid->proto & WPA_PROTO_WPA) {
459 ret = os_snprintf(pos, end - pos, "%sWPA", first ? "" : " ");
460 if (ret < 0 || ret >= end - pos)
461 return buf;
462 pos += ret;
463 first = 0;
464 }
465
466 if (ssid->proto & WPA_PROTO_RSN) {
467 ret = os_snprintf(pos, end - pos, "%sRSN", first ? "" : " ");
468 if (ret < 0 || ret >= end - pos)
469 return buf;
470 pos += ret;
471 first = 0;
472 }
473
474 return buf;
475 }
476 #endif /* NO_CONFIG_WRITE */
477
478
479 static int wpa_config_parse_key_mgmt(const struct parse_data *data,
480 struct wpa_ssid *ssid, int line,
481 const char *value)
482 {
483 int val = 0, last, errors = 0;
484 char *start, *end, *buf;
485
486 buf = os_strdup(value);
487 if (buf == NULL)
488 return -1;
489 start = buf;
490
491 while (*start != '\0') {
492 while (*start == ' ' || *start == '\t')
493 start++;
494 if (*start == '\0')
495 break;
496 end = start;
497 while (*end != ' ' && *end != '\t' && *end != '\0')
498 end++;
499 last = *end == '\0';
500 *end = '\0';
501 if (os_strcmp(start, "WPA-PSK") == 0)
502 val |= WPA_KEY_MGMT_PSK;
503 else if (os_strcmp(start, "WPA-EAP") == 0)
504 val |= WPA_KEY_MGMT_IEEE8021X;
505 else if (os_strcmp(start, "IEEE8021X") == 0)
506 val |= WPA_KEY_MGMT_IEEE8021X_NO_WPA;
507 else if (os_strcmp(start, "NONE") == 0)
508 val |= WPA_KEY_MGMT_NONE;
509 else if (os_strcmp(start, "WPA-NONE") == 0)
510 val |= WPA_KEY_MGMT_WPA_NONE;
511 #ifdef CONFIG_IEEE80211R
512 else if (os_strcmp(start, "FT-PSK") == 0)
513 val |= WPA_KEY_MGMT_FT_PSK;
514 else if (os_strcmp(start, "FT-EAP") == 0)
515 val |= WPA_KEY_MGMT_FT_IEEE8021X;
516 #endif /* CONFIG_IEEE80211R */
517 #ifdef CONFIG_IEEE80211W
518 else if (os_strcmp(start, "WPA-PSK-SHA256") == 0)
519 val |= WPA_KEY_MGMT_PSK_SHA256;
520 else if (os_strcmp(start, "WPA-EAP-SHA256") == 0)
521 val |= WPA_KEY_MGMT_IEEE8021X_SHA256;
522 #endif /* CONFIG_IEEE80211W */
523 #ifdef CONFIG_WPS
524 else if (os_strcmp(start, "WPS") == 0)
525 val |= WPA_KEY_MGMT_WPS;
526 #endif /* CONFIG_WPS */
527 else {
528 wpa_printf(MSG_ERROR, "Line %d: invalid key_mgmt '%s'",
529 line, start);
530 errors++;
531 }
532
533 if (last)
534 break;
535 start = end + 1;
536 }
537 os_free(buf);
538
539 if (val == 0) {
540 wpa_printf(MSG_ERROR,
541 "Line %d: no key_mgmt values configured.", line);
542 errors++;
543 }
544
545 wpa_printf(MSG_MSGDUMP, "key_mgmt: 0x%x", val);
546 ssid->key_mgmt = val;
547 return errors ? -1 : 0;
548 }
549
550
551 #ifndef NO_CONFIG_WRITE
552 static char * wpa_config_write_key_mgmt(const struct parse_data *data,
553 struct wpa_ssid *ssid)
554 {
555 char *buf, *pos, *end;
556 int ret;
557
558 pos = buf = os_zalloc(50);
559 if (buf == NULL)
560 return NULL;
561 end = buf + 50;
562
563 if (ssid->key_mgmt & WPA_KEY_MGMT_PSK) {
564 ret = os_snprintf(pos, end - pos, "%sWPA-PSK",
565 pos == buf ? "" : " ");
566 if (ret < 0 || ret >= end - pos) {
567 end[-1] = '\0';
568 return buf;
569 }
570 pos += ret;
571 }
572
573 if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X) {
574 ret = os_snprintf(pos, end - pos, "%sWPA-EAP",
575 pos == buf ? "" : " ");
576 if (ret < 0 || ret >= end - pos) {
577 end[-1] = '\0';
578 return buf;
579 }
580 pos += ret;
581 }
582
583 if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
584 ret = os_snprintf(pos, end - pos, "%sIEEE8021X",
585 pos == buf ? "" : " ");
586 if (ret < 0 || ret >= end - pos) {
587 end[-1] = '\0';
588 return buf;
589 }
590 pos += ret;
591 }
592
593 if (ssid->key_mgmt & WPA_KEY_MGMT_NONE) {
594 ret = os_snprintf(pos, end - pos, "%sNONE",
595 pos == buf ? "" : " ");
596 if (ret < 0 || ret >= end - pos) {
597 end[-1] = '\0';
598 return buf;
599 }
600 pos += ret;
601 }
602
603 if (ssid->key_mgmt & WPA_KEY_MGMT_WPA_NONE) {
604 ret = os_snprintf(pos, end - pos, "%sWPA-NONE",
605 pos == buf ? "" : " ");
606 if (ret < 0 || ret >= end - pos) {
607 end[-1] = '\0';
608 return buf;
609 }
610 pos += ret;
611 }
612
613 #ifdef CONFIG_IEEE80211R
614 if (ssid->key_mgmt & WPA_KEY_MGMT_FT_PSK)
615 pos += os_snprintf(pos, end - pos, "%sFT-PSK",
616 pos == buf ? "" : " ");
617
618 if (ssid->key_mgmt & WPA_KEY_MGMT_FT_IEEE8021X)
619 pos += os_snprintf(pos, end - pos, "%sFT-EAP",
620 pos == buf ? "" : " ");
621 #endif /* CONFIG_IEEE80211R */
622
623 #ifdef CONFIG_IEEE80211W
624 if (ssid->key_mgmt & WPA_KEY_MGMT_PSK_SHA256)
625 pos += os_snprintf(pos, end - pos, "%sWPA-PSK-SHA256",
626 pos == buf ? "" : " ");
627
628 if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_SHA256)
629 pos += os_snprintf(pos, end - pos, "%sWPA-EAP-SHA256",
630 pos == buf ? "" : " ");
631 #endif /* CONFIG_IEEE80211W */
632
633 #ifdef CONFIG_WPS
634 if (ssid->key_mgmt & WPA_KEY_MGMT_WPS)
635 pos += os_snprintf(pos, end - pos, "%sWPS",
636 pos == buf ? "" : " ");
637 #endif /* CONFIG_WPS */
638
639 return buf;
640 }
641 #endif /* NO_CONFIG_WRITE */
642
643
644 static int wpa_config_parse_cipher(int line, const char *value)
645 {
646 int val = 0, last;
647 char *start, *end, *buf;
648
649 buf = os_strdup(value);
650 if (buf == NULL)
651 return -1;
652 start = buf;
653
654 while (*start != '\0') {
655 while (*start == ' ' || *start == '\t')
656 start++;
657 if (*start == '\0')
658 break;
659 end = start;
660 while (*end != ' ' && *end != '\t' && *end != '\0')
661 end++;
662 last = *end == '\0';
663 *end = '\0';
664 if (os_strcmp(start, "CCMP") == 0)
665 val |= WPA_CIPHER_CCMP;
666 else if (os_strcmp(start, "TKIP") == 0)
667 val |= WPA_CIPHER_TKIP;
668 else if (os_strcmp(start, "WEP104") == 0)
669 val |= WPA_CIPHER_WEP104;
670 else if (os_strcmp(start, "WEP40") == 0)
671 val |= WPA_CIPHER_WEP40;
672 else if (os_strcmp(start, "NONE") == 0)
673 val |= WPA_CIPHER_NONE;
674 else {
675 wpa_printf(MSG_ERROR, "Line %d: invalid cipher '%s'.",
676 line, start);
677 os_free(buf);
678 return -1;
679 }
680
681 if (last)
682 break;
683 start = end + 1;
684 }
685 os_free(buf);
686
687 if (val == 0) {
688 wpa_printf(MSG_ERROR, "Line %d: no cipher values configured.",
689 line);
690 return -1;
691 }
692 return val;
693 }
694
695
696 #ifndef NO_CONFIG_WRITE
697 static char * wpa_config_write_cipher(int cipher)
698 {
699 char *buf, *pos, *end;
700 int ret;
701
702 pos = buf = os_zalloc(50);
703 if (buf == NULL)
704 return NULL;
705 end = buf + 50;
706
707 if (cipher & WPA_CIPHER_CCMP) {
708 ret = os_snprintf(pos, end - pos, "%sCCMP",
709 pos == buf ? "" : " ");
710 if (ret < 0 || ret >= end - pos) {
711 end[-1] = '\0';
712 return buf;
713 }
714 pos += ret;
715 }
716
717 if (cipher & WPA_CIPHER_TKIP) {
718 ret = os_snprintf(pos, end - pos, "%sTKIP",
719 pos == buf ? "" : " ");
720 if (ret < 0 || ret >= end - pos) {
721 end[-1] = '\0';
722 return buf;
723 }
724 pos += ret;
725 }
726
727 if (cipher & WPA_CIPHER_WEP104) {
728 ret = os_snprintf(pos, end - pos, "%sWEP104",
729 pos == buf ? "" : " ");
730 if (ret < 0 || ret >= end - pos) {
731 end[-1] = '\0';
732 return buf;
733 }
734 pos += ret;
735 }
736
737 if (cipher & WPA_CIPHER_WEP40) {
738 ret = os_snprintf(pos, end - pos, "%sWEP40",
739 pos == buf ? "" : " ");
740 if (ret < 0 || ret >= end - pos) {
741 end[-1] = '\0';
742 return buf;
743 }
744 pos += ret;
745 }
746
747 if (cipher & WPA_CIPHER_NONE) {
748 ret = os_snprintf(pos, end - pos, "%sNONE",
749 pos == buf ? "" : " ");
750 if (ret < 0 || ret >= end - pos) {
751 end[-1] = '\0';
752 return buf;
753 }
754 pos += ret;
755 }
756
757 return buf;
758 }
759 #endif /* NO_CONFIG_WRITE */
760
761
762 static int wpa_config_parse_pairwise(const struct parse_data *data,
763 struct wpa_ssid *ssid, int line,
764 const char *value)
765 {
766 int val;
767 val = wpa_config_parse_cipher(line, value);
768 if (val == -1)
769 return -1;
770 if (val & ~(WPA_CIPHER_CCMP | WPA_CIPHER_TKIP | WPA_CIPHER_NONE)) {
771 wpa_printf(MSG_ERROR, "Line %d: not allowed pairwise cipher "
772 "(0x%x).", line, val);
773 return -1;
774 }
775
776 wpa_printf(MSG_MSGDUMP, "pairwise: 0x%x", val);
777 ssid->pairwise_cipher = val;
778 return 0;
779 }
780
781
782 #ifndef NO_CONFIG_WRITE
783 static char * wpa_config_write_pairwise(const struct parse_data *data,
784 struct wpa_ssid *ssid)
785 {
786 return wpa_config_write_cipher(ssid->pairwise_cipher);
787 }
788 #endif /* NO_CONFIG_WRITE */
789
790
791 static int wpa_config_parse_group(const struct parse_data *data,
792 struct wpa_ssid *ssid, int line,
793 const char *value)
794 {
795 int val;
796 val = wpa_config_parse_cipher(line, value);
797 if (val == -1)
798 return -1;
799 if (val & ~(WPA_CIPHER_CCMP | WPA_CIPHER_TKIP | WPA_CIPHER_WEP104 |
800 WPA_CIPHER_WEP40)) {
801 wpa_printf(MSG_ERROR, "Line %d: not allowed group cipher "
802 "(0x%x).", line, val);
803 return -1;
804 }
805
806 wpa_printf(MSG_MSGDUMP, "group: 0x%x", val);
807 ssid->group_cipher = val;
808 return 0;
809 }
810
811
812 #ifndef NO_CONFIG_WRITE
813 static char * wpa_config_write_group(const struct parse_data *data,
814 struct wpa_ssid *ssid)
815 {
816 return wpa_config_write_cipher(ssid->group_cipher);
817 }
818 #endif /* NO_CONFIG_WRITE */
819
820
821 static int wpa_config_parse_auth_alg(const struct parse_data *data,
822 struct wpa_ssid *ssid, int line,
823 const char *value)
824 {
825 int val = 0, last, errors = 0;
826 char *start, *end, *buf;
827
828 buf = os_strdup(value);
829 if (buf == NULL)
830 return -1;
831 start = buf;
832
833 while (*start != '\0') {
834 while (*start == ' ' || *start == '\t')
835 start++;
836 if (*start == '\0')
837 break;
838 end = start;
839 while (*end != ' ' && *end != '\t' && *end != '\0')
840 end++;
841 last = *end == '\0';
842 *end = '\0';
843 if (os_strcmp(start, "OPEN") == 0)
844 val |= WPA_AUTH_ALG_OPEN;
845 else if (os_strcmp(start, "SHARED") == 0)
846 val |= WPA_AUTH_ALG_SHARED;
847 else if (os_strcmp(start, "LEAP") == 0)
848 val |= WPA_AUTH_ALG_LEAP;
849 else {
850 wpa_printf(MSG_ERROR, "Line %d: invalid auth_alg '%s'",
851 line, start);
852 errors++;
853 }
854
855 if (last)
856 break;
857 start = end + 1;
858 }
859 os_free(buf);
860
861 if (val == 0) {
862 wpa_printf(MSG_ERROR,
863 "Line %d: no auth_alg values configured.", line);
864 errors++;
865 }
866
867 wpa_printf(MSG_MSGDUMP, "auth_alg: 0x%x", val);
868 ssid->auth_alg = val;
869 return errors ? -1 : 0;
870 }
871
872
873 #ifndef NO_CONFIG_WRITE
874 static char * wpa_config_write_auth_alg(const struct parse_data *data,
875 struct wpa_ssid *ssid)
876 {
877 char *buf, *pos, *end;
878 int ret;
879
880 pos = buf = os_zalloc(30);
881 if (buf == NULL)
882 return NULL;
883 end = buf + 30;
884
885 if (ssid->auth_alg & WPA_AUTH_ALG_OPEN) {
886 ret = os_snprintf(pos, end - pos, "%sOPEN",
887 pos == buf ? "" : " ");
888 if (ret < 0 || ret >= end - pos) {
889 end[-1] = '\0';
890 return buf;
891 }
892 pos += ret;
893 }
894
895 if (ssid->auth_alg & WPA_AUTH_ALG_SHARED) {
896 ret = os_snprintf(pos, end - pos, "%sSHARED",
897 pos == buf ? "" : " ");
898 if (ret < 0 || ret >= end - pos) {
899 end[-1] = '\0';
900 return buf;
901 }
902 pos += ret;
903 }
904
905 if (ssid->auth_alg & WPA_AUTH_ALG_LEAP) {
906 ret = os_snprintf(pos, end - pos, "%sLEAP",
907 pos == buf ? "" : " ");
908 if (ret < 0 || ret >= end - pos) {
909 end[-1] = '\0';
910 return buf;
911 }
912 pos += ret;
913 }
914
915 return buf;
916 }
917 #endif /* NO_CONFIG_WRITE */
918
919
920 #ifdef IEEE8021X_EAPOL
921 static int wpa_config_parse_eap(const struct parse_data *data,
922 struct wpa_ssid *ssid, int line,
923 const char *value)
924 {
925 int last, errors = 0;
926 char *start, *end, *buf;
927 struct eap_method_type *methods = NULL, *tmp;
928 size_t num_methods = 0;
929
930 buf = os_strdup(value);
931 if (buf == NULL)
932 return -1;
933 start = buf;
934
935 while (*start != '\0') {
936 while (*start == ' ' || *start == '\t')
937 start++;
938 if (*start == '\0')
939 break;
940 end = start;
941 while (*end != ' ' && *end != '\t' && *end != '\0')
942 end++;
943 last = *end == '\0';
944 *end = '\0';
945 tmp = methods;
946 methods = os_realloc(methods,
947 (num_methods + 1) * sizeof(*methods));
948 if (methods == NULL) {
949 os_free(tmp);
950 os_free(buf);
951 return -1;
952 }
953 methods[num_methods].method = eap_peer_get_type(
954 start, &methods[num_methods].vendor);
955 if (methods[num_methods].vendor == EAP_VENDOR_IETF &&
956 methods[num_methods].method == EAP_TYPE_NONE) {
957 wpa_printf(MSG_ERROR, "Line %d: unknown EAP method "
958 "'%s'", line, start);
959 wpa_printf(MSG_ERROR, "You may need to add support for"
960 " this EAP method during wpa_supplicant\n"
961 "build time configuration.\n"
962 "See README for more information.");
963 errors++;
964 } else if (methods[num_methods].vendor == EAP_VENDOR_IETF &&
965 methods[num_methods].method == EAP_TYPE_LEAP)
966 ssid->leap++;
967 else
968 ssid->non_leap++;
969 num_methods++;
970 if (last)
971 break;
972 start = end + 1;
973 }
974 os_free(buf);
975
976 tmp = methods;
977 methods = os_realloc(methods, (num_methods + 1) * sizeof(*methods));
978 if (methods == NULL) {
979 os_free(tmp);
980 return -1;
981 }
982 methods[num_methods].vendor = EAP_VENDOR_IETF;
983 methods[num_methods].method = EAP_TYPE_NONE;
984 num_methods++;
985
986 wpa_hexdump(MSG_MSGDUMP, "eap methods",
987 (u8 *) methods, num_methods * sizeof(*methods));
988 ssid->eap.eap_methods = methods;
989 return errors ? -1 : 0;
990 }
991
992
993 static char * wpa_config_write_eap(const struct parse_data *data,
994 struct wpa_ssid *ssid)
995 {
996 int i, ret;
997 char *buf, *pos, *end;
998 const struct eap_method_type *eap_methods = ssid->eap.eap_methods;
999 const char *name;
1000
1001 if (eap_methods == NULL)
1002 return NULL;
1003
1004 pos = buf = os_zalloc(100);
1005 if (buf == NULL)
1006 return NULL;
1007 end = buf + 100;
1008
1009 for (i = 0; eap_methods[i].vendor != EAP_VENDOR_IETF ||
1010 eap_methods[i].method != EAP_TYPE_NONE; i++) {
1011 name = eap_get_name(eap_methods[i].vendor,
1012 eap_methods[i].method);
1013 if (name) {
1014 ret = os_snprintf(pos, end - pos, "%s%s",
1015 pos == buf ? "" : " ", name);
1016 if (ret < 0 || ret >= end - pos)
1017 break;
1018 pos += ret;
1019 }
1020 }
1021
1022 end[-1] = '\0';
1023
1024 return buf;
1025 }
1026
1027
1028 static int wpa_config_parse_password(const struct parse_data *data,
1029 struct wpa_ssid *ssid, int line,
1030 const char *value)
1031 {
1032 u8 *hash;
1033
1034 if (os_strcmp(value, "NULL") == 0) {
1035 wpa_printf(MSG_DEBUG, "Unset configuration string 'password'");
1036 os_free(ssid->eap.password);
1037 ssid->eap.password = NULL;
1038 ssid->eap.password_len = 0;
1039 return 0;
1040 }
1041
1042 if (os_strncmp(value, "hash:", 5) != 0) {
1043 char *tmp;
1044 size_t res_len;
1045
1046 tmp = wpa_config_parse_string(value, &res_len);
1047 if (tmp == NULL) {
1048 wpa_printf(MSG_ERROR, "Line %d: failed to parse "
1049 "password.", line);
1050 return -1;
1051 }
1052 wpa_hexdump_ascii_key(MSG_MSGDUMP, data->name,
1053 (u8 *) tmp, res_len);
1054
1055 os_free(ssid->eap.password);
1056 ssid->eap.password = (u8 *) tmp;
1057 ssid->eap.password_len = res_len;
1058 ssid->eap.flags &= ~EAP_CONFIG_FLAGS_PASSWORD_NTHASH;
1059
1060 return 0;
1061 }
1062
1063
1064 /* NtPasswordHash: hash:<32 hex digits> */
1065 if (os_strlen(value + 5) != 2 * 16) {
1066 wpa_printf(MSG_ERROR, "Line %d: Invalid password hash length "
1067 "(expected 32 hex digits)", line);
1068 return -1;
1069 }
1070
1071 hash = os_malloc(16);
1072 if (hash == NULL)
1073 return -1;
1074
1075 if (hexstr2bin(value + 5, hash, 16)) {
1076 os_free(hash);
1077 wpa_printf(MSG_ERROR, "Line %d: Invalid password hash", line);
1078 return -1;
1079 }
1080
1081 wpa_hexdump_key(MSG_MSGDUMP, data->name, hash, 16);
1082
1083 os_free(ssid->eap.password);
1084 ssid->eap.password = hash;
1085 ssid->eap.password_len = 16;
1086 ssid->eap.flags |= EAP_CONFIG_FLAGS_PASSWORD_NTHASH;
1087
1088 return 0;
1089 }
1090
1091
1092 static char * wpa_config_write_password(const struct parse_data *data,
1093 struct wpa_ssid *ssid)
1094 {
1095 char *buf;
1096
1097 if (ssid->eap.password == NULL)
1098 return NULL;
1099
1100 if (!(ssid->eap.flags & EAP_CONFIG_FLAGS_PASSWORD_NTHASH)) {
1101 return wpa_config_write_string(
1102 ssid->eap.password, ssid->eap.password_len);
1103 }
1104
1105 buf = os_malloc(5 + 32 + 1);
1106 if (buf == NULL)
1107 return NULL;
1108
1109 os_memcpy(buf, "hash:", 5);
1110 wpa_snprintf_hex(buf + 5, 32 + 1, ssid->eap.password, 16);
1111
1112 return buf;
1113 }
1114 #endif /* IEEE8021X_EAPOL */
1115
1116
1117 static int wpa_config_parse_wep_key(u8 *key, size_t *len, int line,
1118 const char *value, int idx)
1119 {
1120 char *buf, title[20];
1121 int res;
1122
1123 buf = wpa_config_parse_string(value, len);
1124 if (buf == NULL) {
1125 wpa_printf(MSG_ERROR, "Line %d: Invalid WEP key %d '%s'.",
1126 line, idx, value);
1127 return -1;
1128 }
1129 if (*len > MAX_WEP_KEY_LEN) {
1130 wpa_printf(MSG_ERROR, "Line %d: Too long WEP key %d '%s'.",
1131 line, idx, value);
1132 os_free(buf);
1133 return -1;
1134 }
1135 os_memcpy(key, buf, *len);
1136 os_free(buf);
1137 res = os_snprintf(title, sizeof(title), "wep_key%d", idx);
1138 if (res >= 0 && (size_t) res < sizeof(title))
1139 wpa_hexdump_key(MSG_MSGDUMP, title, key, *len);
1140 return 0;
1141 }
1142
1143
1144 static int wpa_config_parse_wep_key0(const struct parse_data *data,
1145 struct wpa_ssid *ssid, int line,
1146 const char *value)
1147 {
1148 return wpa_config_parse_wep_key(ssid->wep_key[0],
1149 &ssid->wep_key_len[0], line,
1150 value, 0);
1151 }
1152
1153
1154 static int wpa_config_parse_wep_key1(const struct parse_data *data,
1155 struct wpa_ssid *ssid, int line,
1156 const char *value)
1157 {
1158 return wpa_config_parse_wep_key(ssid->wep_key[1],
1159 &ssid->wep_key_len[1], line,
1160 value, 1);
1161 }
1162
1163
1164 static int wpa_config_parse_wep_key2(const struct parse_data *data,
1165 struct wpa_ssid *ssid, int line,
1166 const char *value)
1167 {
1168 return wpa_config_parse_wep_key(ssid->wep_key[2],
1169 &ssid->wep_key_len[2], line,
1170 value, 2);
1171 }
1172
1173
1174 static int wpa_config_parse_wep_key3(const struct parse_data *data,
1175 struct wpa_ssid *ssid, int line,
1176 const char *value)
1177 {
1178 return wpa_config_parse_wep_key(ssid->wep_key[3],
1179 &ssid->wep_key_len[3], line,
1180 value, 3);
1181 }
1182
1183
1184 #ifndef NO_CONFIG_WRITE
1185 static char * wpa_config_write_wep_key(struct wpa_ssid *ssid, int idx)
1186 {
1187 if (ssid->wep_key_len[idx] == 0)
1188 return NULL;
1189 return wpa_config_write_string(ssid->wep_key[idx],
1190 ssid->wep_key_len[idx]);
1191 }
1192
1193
1194 static char * wpa_config_write_wep_key0(const struct parse_data *data,
1195 struct wpa_ssid *ssid)
1196 {
1197 return wpa_config_write_wep_key(ssid, 0);
1198 }
1199
1200
1201 static char * wpa_config_write_wep_key1(const struct parse_data *data,
1202 struct wpa_ssid *ssid)
1203 {
1204 return wpa_config_write_wep_key(ssid, 1);
1205 }
1206
1207
1208 static char * wpa_config_write_wep_key2(const struct parse_data *data,
1209 struct wpa_ssid *ssid)
1210 {
1211 return wpa_config_write_wep_key(ssid, 2);
1212 }
1213
1214
1215 static char * wpa_config_write_wep_key3(const struct parse_data *data,
1216 struct wpa_ssid *ssid)
1217 {
1218 return wpa_config_write_wep_key(ssid, 3);
1219 }
1220 #endif /* NO_CONFIG_WRITE */
1221
1222
1223 /* Helper macros for network block parser */
1224
1225 #ifdef OFFSET
1226 #undef OFFSET
1227 #endif /* OFFSET */
1228 /* OFFSET: Get offset of a variable within the wpa_ssid structure */
1229 #define OFFSET(v) ((void *) &((struct wpa_ssid *) 0)->v)
1230
1231 /* STR: Define a string variable for an ASCII string; f = field name */
1232 #ifdef NO_CONFIG_WRITE
1233 #define _STR(f) #f, wpa_config_parse_str, OFFSET(f)
1234 #define _STRe(f) #f, wpa_config_parse_str, OFFSET(eap.f)
1235 #else /* NO_CONFIG_WRITE */
1236 #define _STR(f) #f, wpa_config_parse_str, wpa_config_write_str, OFFSET(f)
1237 #define _STRe(f) #f, wpa_config_parse_str, wpa_config_write_str, OFFSET(eap.f)
1238 #endif /* NO_CONFIG_WRITE */
1239 #define STR(f) _STR(f), NULL, NULL, NULL, 0
1240 #define STRe(f) _STRe(f), NULL, NULL, NULL, 0
1241 #define STR_KEY(f) _STR(f), NULL, NULL, NULL, 1
1242 #define STR_KEYe(f) _STRe(f), NULL, NULL, NULL, 1
1243
1244 /* STR_LEN: Define a string variable with a separate variable for storing the
1245 * data length. Unlike STR(), this can be used to store arbitrary binary data
1246 * (i.e., even nul termination character). */
1247 #define _STR_LEN(f) _STR(f), OFFSET(f ## _len)
1248 #define _STR_LENe(f) _STRe(f), OFFSET(eap.f ## _len)
1249 #define STR_LEN(f) _STR_LEN(f), NULL, NULL, 0
1250 #define STR_LENe(f) _STR_LENe(f), NULL, NULL, 0
1251 #define STR_LEN_KEY(f) _STR_LEN(f), NULL, NULL, 1
1252
1253 /* STR_RANGE: Like STR_LEN(), but with minimum and maximum allowed length
1254 * explicitly specified. */
1255 #define _STR_RANGE(f, min, max) _STR_LEN(f), (void *) (min), (void *) (max)
1256 #define STR_RANGE(f, min, max) _STR_RANGE(f, min, max), 0
1257 #define STR_RANGE_KEY(f, min, max) _STR_RANGE(f, min, max), 1
1258
1259 #ifdef NO_CONFIG_WRITE
1260 #define _INT(f) #f, wpa_config_parse_int, OFFSET(f), (void *) 0
1261 #define _INTe(f) #f, wpa_config_parse_int, OFFSET(eap.f), (void *) 0
1262 #else /* NO_CONFIG_WRITE */
1263 #define _INT(f) #f, wpa_config_parse_int, wpa_config_write_int, \
1264 OFFSET(f), (void *) 0
1265 #define _INTe(f) #f, wpa_config_parse_int, wpa_config_write_int, \
1266 OFFSET(eap.f), (void *) 0
1267 #endif /* NO_CONFIG_WRITE */
1268
1269 /* INT: Define an integer variable */
1270 #define INT(f) _INT(f), NULL, NULL, 0
1271 #define INTe(f) _INTe(f), NULL, NULL, 0
1272
1273 /* INT_RANGE: Define an integer variable with allowed value range */
1274 #define INT_RANGE(f, min, max) _INT(f), (void *) (min), (void *) (max), 0
1275
1276 /* FUNC: Define a configuration variable that uses a custom function for
1277 * parsing and writing the value. */
1278 #ifdef NO_CONFIG_WRITE
1279 #define _FUNC(f) #f, wpa_config_parse_ ## f, NULL, NULL, NULL, NULL
1280 #else /* NO_CONFIG_WRITE */
1281 #define _FUNC(f) #f, wpa_config_parse_ ## f, wpa_config_write_ ## f, \
1282 NULL, NULL, NULL, NULL
1283 #endif /* NO_CONFIG_WRITE */
1284 #define FUNC(f) _FUNC(f), 0
1285 #define FUNC_KEY(f) _FUNC(f), 1
1286
1287 /*
1288 * Table of network configuration variables. This table is used to parse each
1289 * network configuration variable, e.g., each line in wpa_supplicant.conf file
1290 * that is inside a network block.
1291 *
1292 * This table is generated using the helper macros defined above and with
1293 * generous help from the C pre-processor. The field name is stored as a string
1294 * into .name and for STR and INT types, the offset of the target buffer within
1295 * struct wpa_ssid is stored in .param1. .param2 (if not NULL) is similar
1296 * offset to the field containing the length of the configuration variable.
1297 * .param3 and .param4 can be used to mark the allowed range (length for STR
1298 * and value for INT).
1299 *
1300 * For each configuration line in wpa_supplicant.conf, the parser goes through
1301 * this table and select the entry that matches with the field name. The parser
1302 * function (.parser) is then called to parse the actual value of the field.
1303 *
1304 * This kind of mechanism makes it easy to add new configuration parameters,
1305 * since only one line needs to be added into this table and into the
1306 * struct wpa_ssid definition if the new variable is either a string or
1307 * integer. More complex types will need to use their own parser and writer
1308 * functions.
1309 */
1310 static const struct parse_data ssid_fields[] = {
1311 { STR_RANGE(ssid, 0, MAX_SSID_LEN) },
1312 { INT_RANGE(scan_ssid, 0, 1) },
1313 { FUNC(bssid) },
1314 { FUNC_KEY(psk) },
1315 { FUNC(proto) },
1316 { FUNC(key_mgmt) },
1317 { FUNC(pairwise) },
1318 { FUNC(group) },
1319 { FUNC(auth_alg) },
1320 #ifdef IEEE8021X_EAPOL
1321 { FUNC(eap) },
1322 { STR_LENe(identity) },
1323 { STR_LENe(anonymous_identity) },
1324 { FUNC_KEY(password) },
1325 { STRe(ca_cert) },
1326 { STRe(ca_path) },
1327 { STRe(client_cert) },
1328 { STRe(private_key) },
1329 { STR_KEYe(private_key_passwd) },
1330 { STRe(dh_file) },
1331 { STRe(subject_match) },
1332 { STRe(altsubject_match) },
1333 { STRe(ca_cert2) },
1334 { STRe(ca_path2) },
1335 { STRe(client_cert2) },
1336 { STRe(private_key2) },
1337 { STR_KEYe(private_key2_passwd) },
1338 { STRe(dh_file2) },
1339 { STRe(subject_match2) },
1340 { STRe(altsubject_match2) },
1341 { STRe(phase1) },
1342 { STRe(phase2) },
1343 { STRe(pcsc) },
1344 { STR_KEYe(pin) },
1345 { STRe(engine_id) },
1346 { STRe(key_id) },
1347 { STRe(cert_id) },
1348 { STRe(ca_cert_id) },
1349 { STR_KEYe(pin2) },
1350 { STRe(engine2_id) },
1351 { STRe(key2_id) },
1352 { STRe(cert2_id) },
1353 { STRe(ca_cert2_id) },
1354 { INTe(engine) },
1355 { INTe(engine2) },
1356 { INT(eapol_flags) },
1357 #endif /* IEEE8021X_EAPOL */
1358 { FUNC_KEY(wep_key0) },
1359 { FUNC_KEY(wep_key1) },
1360 { FUNC_KEY(wep_key2) },
1361 { FUNC_KEY(wep_key3) },
1362 { INT(wep_tx_keyidx) },
1363 { INT(priority) },
1364 #ifdef IEEE8021X_EAPOL
1365 { INT(eap_workaround) },
1366 { STRe(pac_file) },
1367 { INTe(fragment_size) },
1368 #endif /* IEEE8021X_EAPOL */
1369 { INT_RANGE(mode, 0, 1) },
1370 { INT_RANGE(proactive_key_caching, 0, 1) },
1371 { INT_RANGE(disabled, 0, 1) },
1372 { STR(id_str) },
1373 #ifdef CONFIG_IEEE80211W
1374 { INT_RANGE(ieee80211w, 0, 2) },
1375 #endif /* CONFIG_IEEE80211W */
1376 { INT_RANGE(peerkey, 0, 1) },
1377 { INT_RANGE(mixed_cell, 0, 1) },
1378 { INT_RANGE(frequency, 0, 10000) },
1379 { INT(wpa_ptk_rekey) }
1380 };
1381
1382 #undef OFFSET
1383 #undef _STR
1384 #undef STR
1385 #undef STR_KEY
1386 #undef _STR_LEN
1387 #undef STR_LEN
1388 #undef STR_LEN_KEY
1389 #undef _STR_RANGE
1390 #undef STR_RANGE
1391 #undef STR_RANGE_KEY
1392 #undef _INT
1393 #undef INT
1394 #undef INT_RANGE
1395 #undef _FUNC
1396 #undef FUNC
1397 #undef FUNC_KEY
1398 #define NUM_SSID_FIELDS (sizeof(ssid_fields) / sizeof(ssid_fields[0]))
1399
1400
1401 /**
1402 * wpa_config_add_prio_network - Add a network to priority lists
1403 * @config: Configuration data from wpa_config_read()
1404 * @ssid: Pointer to the network configuration to be added to the list
1405 * Returns: 0 on success, -1 on failure
1406 *
1407 * This function is used to add a network block to the priority list of
1408 * networks. This must be called for each network when reading in the full
1409 * configuration. In addition, this can be used indirectly when updating
1410 * priorities by calling wpa_config_update_prio_list().
1411 */
1412 int wpa_config_add_prio_network(struct wpa_config *config,
1413 struct wpa_ssid *ssid)
1414 {
1415 int prio;
1416 struct wpa_ssid *prev, **nlist;
1417
1418 /*
1419 * Add to an existing priority list if one is available for the
1420 * configured priority level for this network.
1421 */
1422 for (prio = 0; prio < config->num_prio; prio++) {
1423 prev = config->pssid[prio];
1424 if (prev->priority == ssid->priority) {
1425 while (prev->pnext)
1426 prev = prev->pnext;
1427 prev->pnext = ssid;
1428 return 0;
1429 }
1430 }
1431
1432 /* First network for this priority - add a new priority list */
1433 nlist = os_realloc(config->pssid,
1434 (config->num_prio + 1) * sizeof(struct wpa_ssid *));
1435 if (nlist == NULL)
1436 return -1;
1437
1438 for (prio = 0; prio < config->num_prio; prio++) {
1439 if (nlist[prio]->priority < ssid->priority)
1440 break;
1441 }
1442
1443 os_memmove(&nlist[prio + 1], &nlist[prio],
1444 (config->num_prio - prio) * sizeof(struct wpa_ssid *));
1445
1446 nlist[prio] = ssid;
1447 config->num_prio++;
1448 config->pssid = nlist;
1449
1450 return 0;
1451 }
1452
1453
1454 /**
1455 * wpa_config_update_prio_list - Update network priority list
1456 * @config: Configuration data from wpa_config_read()
1457 * Returns: 0 on success, -1 on failure
1458 *
1459 * This function is called to update the priority list of networks in the
1460 * configuration when a network is being added or removed. This is also called
1461 * if a priority for a network is changed.
1462 */
1463 static int wpa_config_update_prio_list(struct wpa_config *config)
1464 {
1465 struct wpa_ssid *ssid;
1466 int ret = 0;
1467
1468 os_free(config->pssid);
1469 config->pssid = NULL;
1470 config->num_prio = 0;
1471
1472 ssid = config->ssid;
1473 while (ssid) {
1474 ssid->pnext = NULL;
1475 if (wpa_config_add_prio_network(config, ssid) < 0)
1476 ret = -1;
1477 ssid = ssid->next;
1478 }
1479
1480 return ret;
1481 }
1482
1483
1484 #ifdef IEEE8021X_EAPOL
1485 static void eap_peer_config_free(struct eap_peer_config *eap)
1486 {
1487 os_free(eap->eap_methods);
1488 os_free(eap->identity);
1489 os_free(eap->anonymous_identity);
1490 os_free(eap->password);
1491 os_free(eap->ca_cert);
1492 os_free(eap->ca_path);
1493 os_free(eap->client_cert);
1494 os_free(eap->private_key);
1495 os_free(eap->private_key_passwd);
1496 os_free(eap->dh_file);
1497 os_free(eap->subject_match);
1498 os_free(eap->altsubject_match);
1499 os_free(eap->ca_cert2);
1500 os_free(eap->ca_path2);
1501 os_free(eap->client_cert2);
1502 os_free(eap->private_key2);
1503 os_free(eap->private_key2_passwd);
1504 os_free(eap->dh_file2);
1505 os_free(eap->subject_match2);
1506 os_free(eap->altsubject_match2);
1507 os_free(eap->phase1);
1508 os_free(eap->phase2);
1509 os_free(eap->pcsc);
1510 os_free(eap->pin);
1511 os_free(eap->engine_id);
1512 os_free(eap->key_id);
1513 os_free(eap->cert_id);
1514 os_free(eap->ca_cert_id);
1515 os_free(eap->key2_id);
1516 os_free(eap->cert2_id);
1517 os_free(eap->ca_cert2_id);
1518 os_free(eap->pin2);
1519 os_free(eap->engine2_id);
1520 os_free(eap->otp);
1521 os_free(eap->pending_req_otp);
1522 os_free(eap->pac_file);
1523 os_free(eap->new_password);
1524 }
1525 #endif /* IEEE8021X_EAPOL */
1526
1527
1528 /**
1529 * wpa_config_free_ssid - Free network/ssid configuration data
1530 * @ssid: Configuration data for the network
1531 *
1532 * This function frees all resources allocated for the network configuration
1533 * data.
1534 */
1535 void wpa_config_free_ssid(struct wpa_ssid *ssid)
1536 {
1537 os_free(ssid->ssid);
1538 os_free(ssid->passphrase);
1539 #ifdef IEEE8021X_EAPOL
1540 eap_peer_config_free(&ssid->eap);
1541 #endif /* IEEE8021X_EAPOL */
1542 os_free(ssid->id_str);
1543 os_free(ssid);
1544 }
1545
1546
1547 /**
1548 * wpa_config_free - Free configuration data
1549 * @config: Configuration data from wpa_config_read()
1550 *
1551 * This function frees all resources allocated for the configuration data by
1552 * wpa_config_read().
1553 */
1554 void wpa_config_free(struct wpa_config *config)
1555 {
1556 #ifndef CONFIG_NO_CONFIG_BLOBS
1557 struct wpa_config_blob *blob, *prevblob;
1558 #endif /* CONFIG_NO_CONFIG_BLOBS */
1559 struct wpa_ssid *ssid, *prev = NULL;
1560 ssid = config->ssid;
1561 while (ssid) {
1562 prev = ssid;
1563 ssid = ssid->next;
1564 wpa_config_free_ssid(prev);
1565 }
1566
1567 #ifndef CONFIG_NO_CONFIG_BLOBS
1568 blob = config->blobs;
1569 prevblob = NULL;
1570 while (blob) {
1571 prevblob = blob;
1572 blob = blob->next;
1573 wpa_config_free_blob(prevblob);
1574 }
1575 #endif /* CONFIG_NO_CONFIG_BLOBS */
1576
1577 os_free(config->ctrl_interface);
1578 os_free(config->ctrl_interface_group);
1579 #ifdef EAP_TLS_OPENSSL
1580 os_free(config->opensc_engine_path);
1581 os_free(config->pkcs11_engine_path);
1582 os_free(config->pkcs11_module_path);
1583 #endif /* EAP_TLS_OPENSSL */
1584 os_free(config->driver_param);
1585 os_free(config->device_name);
1586 os_free(config->manufacturer);
1587 os_free(config->model_name);
1588 os_free(config->model_number);
1589 os_free(config->serial_number);
1590 os_free(config->device_type);
1591 os_free(config->pssid);
1592 os_free(config);
1593 }
1594
1595
1596 /**
1597 * wpa_config_get_network - Get configured network based on id
1598 * @config: Configuration data from wpa_config_read()
1599 * @id: Unique network id to search for
1600 * Returns: Network configuration or %NULL if not found
1601 */
1602 struct wpa_ssid * wpa_config_get_network(struct wpa_config *config, int id)
1603 {
1604 struct wpa_ssid *ssid;
1605
1606 ssid = config->ssid;
1607 while (ssid) {
1608 if (id == ssid->id)
1609 break;
1610 ssid = ssid->next;
1611 }
1612
1613 return ssid;
1614 }
1615
1616
1617 /**
1618 * wpa_config_add_network - Add a new network with empty configuration
1619 * @config: Configuration data from wpa_config_read()
1620 * Returns: The new network configuration or %NULL if operation failed
1621 */
1622 struct wpa_ssid * wpa_config_add_network(struct wpa_config *config)
1623 {
1624 int id;
1625 struct wpa_ssid *ssid, *last = NULL;
1626
1627 id = -1;
1628 ssid = config->ssid;
1629 while (ssid) {
1630 if (ssid->id > id)
1631 id = ssid->id;
1632 last = ssid;
1633 ssid = ssid->next;
1634 }
1635 id++;
1636
1637 ssid = os_zalloc(sizeof(*ssid));
1638 if (ssid == NULL)
1639 return NULL;
1640 ssid->id = id;
1641 if (last)
1642 last->next = ssid;
1643 else
1644 config->ssid = ssid;
1645
1646 wpa_config_update_prio_list(config);
1647
1648 return ssid;
1649 }
1650
1651
1652 /**
1653 * wpa_config_remove_network - Remove a configured network based on id
1654 * @config: Configuration data from wpa_config_read()
1655 * @id: Unique network id to search for
1656 * Returns: 0 on success, or -1 if the network was not found
1657 */
1658 int wpa_config_remove_network(struct wpa_config *config, int id)
1659 {
1660 struct wpa_ssid *ssid, *prev = NULL;
1661
1662 ssid = config->ssid;
1663 while (ssid) {
1664 if (id == ssid->id)
1665 break;
1666 prev = ssid;
1667 ssid = ssid->next;
1668 }
1669
1670 if (ssid == NULL)
1671 return -1;
1672
1673 if (prev)
1674 prev->next = ssid->next;
1675 else
1676 config->ssid = ssid->next;
1677
1678 wpa_config_update_prio_list(config);
1679 wpa_config_free_ssid(ssid);
1680 return 0;
1681 }
1682
1683
1684 /**
1685 * wpa_config_set_network_defaults - Set network default values
1686 * @ssid: Pointer to network configuration data
1687 */
1688 void wpa_config_set_network_defaults(struct wpa_ssid *ssid)
1689 {
1690 ssid->proto = DEFAULT_PROTO;
1691 ssid->pairwise_cipher = DEFAULT_PAIRWISE;
1692 ssid->group_cipher = DEFAULT_GROUP;
1693 ssid->key_mgmt = DEFAULT_KEY_MGMT;
1694 #ifdef IEEE8021X_EAPOL
1695 ssid->eapol_flags = DEFAULT_EAPOL_FLAGS;
1696 ssid->eap_workaround = DEFAULT_EAP_WORKAROUND;
1697 ssid->eap.fragment_size = DEFAULT_FRAGMENT_SIZE;
1698 #endif /* IEEE8021X_EAPOL */
1699 }
1700
1701
1702 /**
1703 * wpa_config_set - Set a variable in network configuration
1704 * @ssid: Pointer to network configuration data
1705 * @var: Variable name, e.g., "ssid"
1706 * @value: Variable value
1707 * @line: Line number in configuration file or 0 if not used
1708 * Returns: 0 on success, -1 on failure
1709 *
1710 * This function can be used to set network configuration variables based on
1711 * both the configuration file and management interface input. The value
1712 * parameter must be in the same format as the text-based configuration file is
1713 * using. For example, strings are using double quotation marks.
1714 */
1715 int wpa_config_set(struct wpa_ssid *ssid, const char *var, const char *value,
1716 int line)
1717 {
1718 size_t i;
1719 int ret = 0;
1720
1721 if (ssid == NULL || var == NULL || value == NULL)
1722 return -1;
1723
1724 for (i = 0; i < NUM_SSID_FIELDS; i++) {
1725 const struct parse_data *field = &ssid_fields[i];
1726 if (os_strcmp(var, field->name) != 0)
1727 continue;
1728
1729 if (field->parser(field, ssid, line, value)) {
1730 if (line) {
1731 wpa_printf(MSG_ERROR, "Line %d: failed to "
1732 "parse %s '%s'.", line, var, value);
1733 }
1734 ret = -1;
1735 }
1736 break;
1737 }
1738 if (i == NUM_SSID_FIELDS) {
1739 if (line) {
1740 wpa_printf(MSG_ERROR, "Line %d: unknown network field "
1741 "'%s'.", line, var);
1742 }
1743 ret = -1;
1744 }
1745
1746 return ret;
1747 }
1748
1749
1750 #ifndef NO_CONFIG_WRITE
1751 /**
1752 * wpa_config_get - Get a variable in network configuration
1753 * @ssid: Pointer to network configuration data
1754 * @var: Variable name, e.g., "ssid"
1755 * Returns: Value of the variable or %NULL on failure
1756 *
1757 * This function can be used to get network configuration variables. The
1758 * returned value is a copy of the configuration variable in text format, i.e,.
1759 * the same format that the text-based configuration file and wpa_config_set()
1760 * are using for the value. The caller is responsible for freeing the returned
1761 * value.
1762 */
1763 char * wpa_config_get(struct wpa_ssid *ssid, const char *var)
1764 {
1765 size_t i;
1766
1767 if (ssid == NULL || var == NULL)
1768 return NULL;
1769
1770 for (i = 0; i < NUM_SSID_FIELDS; i++) {
1771 const struct parse_data *field = &ssid_fields[i];
1772 if (os_strcmp(var, field->name) == 0)
1773 return field->writer(field, ssid);
1774 }
1775
1776 return NULL;
1777 }
1778
1779
1780 /**
1781 * wpa_config_get_no_key - Get a variable in network configuration (no keys)
1782 * @ssid: Pointer to network configuration data
1783 * @var: Variable name, e.g., "ssid"
1784 * Returns: Value of the variable or %NULL on failure
1785 *
1786 * This function can be used to get network configuration variable like
1787 * wpa_config_get(). The only difference is that this functions does not expose
1788 * key/password material from the configuration. In case a key/password field
1789 * is requested, the returned value is an empty string or %NULL if the variable
1790 * is not set or "*" if the variable is set (regardless of its value). The
1791 * returned value is a copy of the configuration variable in text format, i.e,.
1792 * the same format that the text-based configuration file and wpa_config_set()
1793 * are using for the value. The caller is responsible for freeing the returned
1794 * value.
1795 */
1796 char * wpa_config_get_no_key(struct wpa_ssid *ssid, const char *var)
1797 {
1798 size_t i;
1799
1800 if (ssid == NULL || var == NULL)
1801 return NULL;
1802
1803 for (i = 0; i < NUM_SSID_FIELDS; i++) {
1804 const struct parse_data *field = &ssid_fields[i];
1805 if (os_strcmp(var, field->name) == 0) {
1806 char *res = field->writer(field, ssid);
1807 if (field->key_data) {
1808 if (res && res[0]) {
1809 wpa_printf(MSG_DEBUG, "Do not allow "
1810 "key_data field to be "
1811 "exposed");
1812 os_free(res);
1813 return os_strdup("*");
1814 }
1815
1816 os_free(res);
1817 return NULL;
1818 }
1819 return res;
1820 }
1821 }
1822
1823 return NULL;
1824 }
1825 #endif /* NO_CONFIG_WRITE */
1826
1827
1828 /**
1829 * wpa_config_update_psk - Update WPA PSK based on passphrase and SSID
1830 * @ssid: Pointer to network configuration data
1831 *
1832 * This function must be called to update WPA PSK when either SSID or the
1833 * passphrase has changed for the network configuration.
1834 */
1835 void wpa_config_update_psk(struct wpa_ssid *ssid)
1836 {
1837 #ifndef CONFIG_NO_PBKDF2
1838 pbkdf2_sha1(ssid->passphrase,
1839 (char *) ssid->ssid, ssid->ssid_len, 4096,
1840 ssid->psk, PMK_LEN);
1841 wpa_hexdump_key(MSG_MSGDUMP, "PSK (from passphrase)",
1842 ssid->psk, PMK_LEN);
1843 ssid->psk_set = 1;
1844 #endif /* CONFIG_NO_PBKDF2 */
1845 }
1846
1847
1848 #ifndef CONFIG_NO_CONFIG_BLOBS
1849 /**
1850 * wpa_config_get_blob - Get a named configuration blob
1851 * @config: Configuration data from wpa_config_read()
1852 * @name: Name of the blob
1853 * Returns: Pointer to blob data or %NULL if not found
1854 */
1855 const struct wpa_config_blob * wpa_config_get_blob(struct wpa_config *config,
1856 const char *name)
1857 {
1858 struct wpa_config_blob *blob = config->blobs;
1859
1860 while (blob) {
1861 if (os_strcmp(blob->name, name) == 0)
1862 return blob;
1863 blob = blob->next;
1864 }
1865 return NULL;
1866 }
1867
1868
1869 /**
1870 * wpa_config_set_blob - Set or add a named configuration blob
1871 * @config: Configuration data from wpa_config_read()
1872 * @blob: New value for the blob
1873 *
1874 * Adds a new configuration blob or replaces the current value of an existing
1875 * blob.
1876 */
1877 void wpa_config_set_blob(struct wpa_config *config,
1878 struct wpa_config_blob *blob)
1879 {
1880 wpa_config_remove_blob(config, blob->name);
1881 blob->next = config->blobs;
1882 config->blobs = blob;
1883 }
1884
1885
1886 /**
1887 * wpa_config_free_blob - Free blob data
1888 * @blob: Pointer to blob to be freed
1889 */
1890 void wpa_config_free_blob(struct wpa_config_blob *blob)
1891 {
1892 if (blob) {
1893 os_free(blob->name);
1894 os_free(blob->data);
1895 os_free(blob);
1896 }
1897 }
1898
1899
1900 /**
1901 * wpa_config_remove_blob - Remove a named configuration blob
1902 * @config: Configuration data from wpa_config_read()
1903 * @name: Name of the blob to remove
1904 * Returns: 0 if blob was removed or -1 if blob was not found
1905 */
1906 int wpa_config_remove_blob(struct wpa_config *config, const char *name)
1907 {
1908 struct wpa_config_blob *pos = config->blobs, *prev = NULL;
1909
1910 while (pos) {
1911 if (os_strcmp(pos->name, name) == 0) {
1912 if (prev)
1913 prev->next = pos->next;
1914 else
1915 config->blobs = pos->next;
1916 wpa_config_free_blob(pos);
1917 return 0;
1918 }
1919 prev = pos;
1920 pos = pos->next;
1921 }
1922
1923 return -1;
1924 }
1925 #endif /* CONFIG_NO_CONFIG_BLOBS */
1926
1927
1928 /**
1929 * wpa_config_alloc_empty - Allocate an empty configuration
1930 * @ctrl_interface: Control interface parameters, e.g., path to UNIX domain
1931 * socket
1932 * @driver_param: Driver parameters
1933 * Returns: Pointer to allocated configuration data or %NULL on failure
1934 */
1935 struct wpa_config * wpa_config_alloc_empty(const char *ctrl_interface,
1936 const char *driver_param)
1937 {
1938 struct wpa_config *config;
1939
1940 config = os_zalloc(sizeof(*config));
1941 if (config == NULL)
1942 return NULL;
1943 config->eapol_version = DEFAULT_EAPOL_VERSION;
1944 config->ap_scan = DEFAULT_AP_SCAN;
1945 config->fast_reauth = DEFAULT_FAST_REAUTH;
1946
1947 if (ctrl_interface)
1948 config->ctrl_interface = os_strdup(ctrl_interface);
1949 if (driver_param)
1950 config->driver_param = os_strdup(driver_param);
1951
1952 return config;
1953 }
1954
1955
1956 #ifndef CONFIG_NO_STDOUT_DEBUG
1957 /**
1958 * wpa_config_debug_dump_networks - Debug dump of configured networks
1959 * @config: Configuration data from wpa_config_read()
1960 */
1961 void wpa_config_debug_dump_networks(struct wpa_config *config)
1962 {
1963 int prio;
1964 struct wpa_ssid *ssid;
1965
1966 for (prio = 0; prio < config->num_prio; prio++) {
1967 ssid = config->pssid[prio];
1968 wpa_printf(MSG_DEBUG, "Priority group %d",
1969 ssid->priority);
1970 while (ssid) {
1971 wpa_printf(MSG_DEBUG, " id=%d ssid='%s'",
1972 ssid->id,
1973 wpa_ssid_txt(ssid->ssid, ssid->ssid_len));
1974 ssid = ssid->pnext;
1975 }
1976 }
1977 }
1978 #endif /* CONFIG_NO_STDOUT_DEBUG */
DragonFly BSD