workbench/network/WirelessManager/wpa_supplicant/config.c

   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 "crypto/sha1.h"
  19 #include "rsn_supp/wpa.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 static int * wpa_config_parse_freqs(const struct parse_data *data,
 921                                     struct wpa_ssid *ssid, int line,
 922                                     const char *value)
 923 {
 924         int *freqs;
 925         size_t used, len;
 926         const char *pos;
 927
 928         used = 0;
 929         len = 10;
 930         freqs = os_zalloc((len + 1) * sizeof(int));
 931         if (freqs == NULL)
 932                 return NULL;
 933
 934         pos = value;
 935         while (pos) {
 936                 while (*pos == ' ')
 937                         pos++;
 938                 if (used == len) {
 939                         int *n;
 940                         size_t i;
 941                         n = os_realloc(freqs, (len * 2 + 1) * sizeof(int));
 942                         if (n == NULL) {
 943                                 os_free(freqs);
 944                                 return NULL;
 945                         }
 946                         for (i = len; i <= len * 2; i++)
 947                                 n[i] = 0;
 948                         freqs = n;
 949                         len *= 2;
 950                 }
 951
 952                 freqs[used] = atoi(pos);
 953                 if (freqs[used] == 0)
 954                         break;
 955                 used++;
 956                 pos = os_strchr(pos + 1, ' ');
 957         }
 958
 959         return freqs;
 960 }
 961
 962
 963 static int wpa_config_parse_scan_freq(const struct parse_data *data,
 964                                       struct wpa_ssid *ssid, int line,
 965                                       const char *value)
 966 {
 967         int *freqs;
 968
 969         freqs = wpa_config_parse_freqs(data, ssid, line, value);
 970         if (freqs == NULL)
 971                 return -1;
 972         os_free(ssid->scan_freq);
 973         ssid->scan_freq = freqs;
 974
 975         return 0;
 976 }
 977
 978
 979 static int wpa_config_parse_freq_list(const struct parse_data *data,
 980                                       struct wpa_ssid *ssid, int line,
 981                                       const char *value)
 982 {
 983         int *freqs;
 984
 985         freqs = wpa_config_parse_freqs(data, ssid, line, value);
 986         if (freqs == NULL)
 987                 return -1;
 988         os_free(ssid->freq_list);
 989         ssid->freq_list = freqs;
 990
 991         return 0;
 992 }
 993
 994
 995 #ifndef NO_CONFIG_WRITE
 996 static char * wpa_config_write_freqs(const struct parse_data *data,
 997                                      const int *freqs)
 998 {
 999         char *buf, *pos, *end;
1000         int i, ret;
1001         size_t count;
1002
1003         if (freqs == NULL)
1004                 return NULL;
1005
1006         count = 0;
1007         for (i = 0; freqs[i]; i++)
1008                 count++;
1009
1010         pos = buf = os_zalloc(10 * count + 1);
1011         if (buf == NULL)
1012                 return NULL;
1013         end = buf + 10 * count + 1;
1014
1015         for (i = 0; freqs[i]; i++) {
1016                 ret = os_snprintf(pos, end - pos, "%s%u",
1017                                   i == 0 ? "" : " ", freqs[i]);
1018                 if (ret < 0 || ret >= end - pos) {
1019                         end[-1] = '\0';
1020                         return buf;
1021                 }
1022                 pos += ret;
1023         }
1024
1025         return buf;
1026 }
1027
1028
1029 static char * wpa_config_write_scan_freq(const struct parse_data *data,
1030                                          struct wpa_ssid *ssid)
1031 {
1032         return wpa_config_write_freqs(data, ssid->scan_freq);
1033 }
1034
1035
1036 static char * wpa_config_write_freq_list(const struct parse_data *data,
1037                                          struct wpa_ssid *ssid)
1038 {
1039         return wpa_config_write_freqs(data, ssid->freq_list);
1040 }
1041 #endif /* NO_CONFIG_WRITE */
1042
1043
1044 #ifdef IEEE8021X_EAPOL
1045 static int wpa_config_parse_eap(const struct parse_data *data,
1046                                 struct wpa_ssid *ssid, int line,
1047                                 const char *value)
1048 {
1049         int last, errors = 0;
1050         char *start, *end, *buf;
1051         struct eap_method_type *methods = NULL, *tmp;
1052         size_t num_methods = 0;
1053
1054         buf = os_strdup(value);
1055         if (buf == NULL)
1056                 return -1;
1057         start = buf;
1058
1059         while (*start != '\0') {
1060                 while (*start == ' ' || *start == '\t')
1061                         start++;
1062                 if (*start == '\0')
1063                         break;
1064                 end = start;
1065                 while (*end != ' ' && *end != '\t' && *end != '\0')
1066                         end++;
1067                 last = *end == '\0';
1068                 *end = '\0';
1069                 tmp = methods;
1070                 methods = os_realloc(methods,
1071                                      (num_methods + 1) * sizeof(*methods));
1072                 if (methods == NULL) {
1073                         os_free(tmp);
1074                         os_free(buf);
1075                         return -1;
1076                 }
1077                 methods[num_methods].method = eap_peer_get_type(
1078                         start, &methods[num_methods].vendor);
1079                 if (methods[num_methods].vendor == EAP_VENDOR_IETF &&
1080                     methods[num_methods].method == EAP_TYPE_NONE) {
1081                         wpa_printf(MSG_ERROR, "Line %d: unknown EAP method "
1082                                    "'%s'", line, start);
1083                         wpa_printf(MSG_ERROR, "You may need to add support for"
1084                                    " this EAP method during wpa_supplicant\n"
1085                                    "build time configuration.\n"
1086                                    "See README for more information.");
1087                         errors++;
1088                 } else if (methods[num_methods].vendor == EAP_VENDOR_IETF &&
1089                            methods[num_methods].method == EAP_TYPE_LEAP)
1090                         ssid->leap++;
1091                 else
1092                         ssid->non_leap++;
1093                 num_methods++;
1094                 if (last)
1095                         break;
1096                 start = end + 1;
1097         }
1098         os_free(buf);
1099
1100         tmp = methods;
1101         methods = os_realloc(methods, (num_methods + 1) * sizeof(*methods));
1102         if (methods == NULL) {
1103                 os_free(tmp);
1104                 return -1;
1105         }
1106         methods[num_methods].vendor = EAP_VENDOR_IETF;
1107         methods[num_methods].method = EAP_TYPE_NONE;
1108         num_methods++;
1109
1110         wpa_hexdump(MSG_MSGDUMP, "eap methods",
1111                     (u8 *) methods, num_methods * sizeof(*methods));
1112         ssid->eap.eap_methods = methods;
1113         return errors ? -1 : 0;
1114 }
1115
1116
1117 #if 0
1118 static char * wpa_config_write_eap(const struct parse_data *data,
1119                                    struct wpa_ssid *ssid)
1120 {
1121         int i, ret;
1122         char *buf, *pos, *end;
1123         const struct eap_method_type *eap_methods = ssid->eap.eap_methods;
1124         const char *name;
1125
1126         if (eap_methods == NULL)
1127                 return NULL;
1128
1129         pos = buf = os_zalloc(100);
1130         if (buf == NULL)
1131                 return NULL;
1132         end = buf + 100;
1133
1134         for (i = 0; eap_methods[i].vendor != EAP_VENDOR_IETF ||
1135                      eap_methods[i].method != EAP_TYPE_NONE; i++) {
1136                 name = eap_get_name(eap_methods[i].vendor,
1137                                     eap_methods[i].method);
1138                 if (name) {
1139                         ret = os_snprintf(pos, end - pos, "%s%s",
1140                                           pos == buf ? "" : " ", name);
1141                         if (ret < 0 || ret >= end - pos)
1142                                 break;
1143                         pos += ret;
1144                 }
1145         }
1146
1147         end[-1] = '\0';
1148
1149         return buf;
1150 }
1151 #endif
1152
1153
1154 static int wpa_config_parse_password(const struct parse_data *data,
1155                                      struct wpa_ssid *ssid, int line,
1156                                      const char *value)
1157 {
1158         u8 *hash;
1159
1160         if (os_strcmp(value, "NULL") == 0) {
1161                 wpa_printf(MSG_DEBUG, "Unset configuration string 'password'");
1162                 os_free(ssid->eap.password);
1163                 ssid->eap.password = NULL;
1164                 ssid->eap.password_len = 0;
1165                 return 0;
1166         }
1167
1168         if (os_strncmp(value, "hash:", 5) != 0) {
1169                 char *tmp;
1170                 size_t res_len;
1171
1172                 tmp = wpa_config_parse_string(value, &res_len);
1173                 if (tmp == NULL) {
1174                         wpa_printf(MSG_ERROR, "Line %d: failed to parse "
1175                                    "password.", line);
1176                         return -1;
1177                 }
1178                 wpa_hexdump_ascii_key(MSG_MSGDUMP, data->name,
1179                                       (u8 *) tmp, res_len);
1180
1181                 os_free(ssid->eap.password);
1182                 ssid->eap.password = (u8 *) tmp;
1183                 ssid->eap.password_len = res_len;
1184                 ssid->eap.flags &= ~EAP_CONFIG_FLAGS_PASSWORD_NTHASH;
1185
1186                 return 0;
1187         }
1188
1189
1190         /* NtPasswordHash: hash:<32 hex digits> */
1191         if (os_strlen(value + 5) != 2 * 16) {
1192                 wpa_printf(MSG_ERROR, "Line %d: Invalid password hash length "
1193                            "(expected 32 hex digits)", line);
1194                 return -1;
1195         }
1196
1197         hash = os_malloc(16);
1198         if (hash == NULL)
1199                 return -1;
1200
1201         if (hexstr2bin(value + 5, hash, 16)) {
1202                 os_free(hash);
1203                 wpa_printf(MSG_ERROR, "Line %d: Invalid password hash", line);
1204                 return -1;
1205         }
1206
1207         wpa_hexdump_key(MSG_MSGDUMP, data->name, hash, 16);
1208
1209         os_free(ssid->eap.password);
1210         ssid->eap.password = hash;
1211         ssid->eap.password_len = 16;
1212         ssid->eap.flags |= EAP_CONFIG_FLAGS_PASSWORD_NTHASH;
1213
1214         return 0;
1215 }
1216
1217
1218 #ifndef NO_CONFIG_WRITE
1219 static char * wpa_config_write_password(const struct parse_data *data,
1220                                         struct wpa_ssid *ssid)
1221 {
1222         char *buf;
1223
1224         if (ssid->eap.password == NULL)
1225                 return NULL;
1226
1227         if (!(ssid->eap.flags & EAP_CONFIG_FLAGS_PASSWORD_NTHASH)) {
1228                 return wpa_config_write_string(
1229                         ssid->eap.password, ssid->eap.password_len);
1230         }
1231
1232         buf = os_malloc(5 + 32 + 1);
1233         if (buf == NULL)
1234                 return NULL;
1235
1236         os_memcpy(buf, "hash:", 5);
1237         wpa_snprintf_hex(buf + 5, 32 + 1, ssid->eap.password, 16);
1238
1239         return buf;
1240 }
1241 #endif /* NO_CONFIG_WRITE */
1242 #endif /* IEEE8021X_EAPOL */
1243
1244
1245 static int wpa_config_parse_wep_key(u8 *key, size_t *len, int line,
1246                                     const char *value, int idx)
1247 {
1248         char *buf, title[20];
1249         int res;
1250
1251         buf = wpa_config_parse_string(value, len);
1252         if (buf == NULL) {
1253                 wpa_printf(MSG_ERROR, "Line %d: Invalid WEP key %d '%s'.",
1254                            line, idx, value);
1255                 return -1;
1256         }
1257         if (*len > MAX_WEP_KEY_LEN) {
1258                 wpa_printf(MSG_ERROR, "Line %d: Too long WEP key %d '%s'.",
1259                            line, idx, value);
1260                 os_free(buf);
1261                 return -1;
1262         }
1263         os_memcpy(key, buf, *len);
1264         os_free(buf);
1265         res = os_snprintf(title, sizeof(title), "wep_key%d", idx);
1266         if (res >= 0 && (size_t) res < sizeof(title))
1267                 wpa_hexdump_key(MSG_MSGDUMP, title, key, *len);
1268         return 0;
1269 }
1270
1271
1272 static int wpa_config_parse_wep_key0(const struct parse_data *data,
1273                                      struct wpa_ssid *ssid, int line,
1274                                      const char *value)
1275 {
1276         return wpa_config_parse_wep_key(ssid->wep_key[0],
1277                                         &ssid->wep_key_len[0], line,
1278                                         value, 0);
1279 }
1280
1281
1282 static int wpa_config_parse_wep_key1(const struct parse_data *data,
1283                                      struct wpa_ssid *ssid, int line,
1284                                      const char *value)
1285 {
1286         return wpa_config_parse_wep_key(ssid->wep_key[1],
1287                                         &ssid->wep_key_len[1], line,
1288                                         value, 1);
1289 }
1290
1291
1292 static int wpa_config_parse_wep_key2(const struct parse_data *data,
1293                                      struct wpa_ssid *ssid, int line,
1294                                      const char *value)
1295 {
1296         return wpa_config_parse_wep_key(ssid->wep_key[2],
1297                                         &ssid->wep_key_len[2], line,
1298                                         value, 2);
1299 }
1300
1301
1302 static int wpa_config_parse_wep_key3(const struct parse_data *data,
1303                                      struct wpa_ssid *ssid, int line,
1304                                      const char *value)
1305 {
1306         return wpa_config_parse_wep_key(ssid->wep_key[3],
1307                                         &ssid->wep_key_len[3], line,
1308                                         value, 3);
1309 }
1310
1311
1312 #ifndef NO_CONFIG_WRITE
1313 static char * wpa_config_write_wep_key(struct wpa_ssid *ssid, int idx)
1314 {
1315         if (ssid->wep_key_len[idx] == 0)
1316                 return NULL;
1317         return wpa_config_write_string(ssid->wep_key[idx],
1318                                        ssid->wep_key_len[idx]);
1319 }
1320
1321
1322 static char * wpa_config_write_wep_key0(const struct parse_data *data,
1323                                         struct wpa_ssid *ssid)
1324 {
1325         return wpa_config_write_wep_key(ssid, 0);
1326 }
1327
1328
1329 static char * wpa_config_write_wep_key1(const struct parse_data *data,
1330                                         struct wpa_ssid *ssid)
1331 {
1332         return wpa_config_write_wep_key(ssid, 1);
1333 }
1334
1335
1336 static char * wpa_config_write_wep_key2(const struct parse_data *data,
1337                                         struct wpa_ssid *ssid)
1338 {
1339         return wpa_config_write_wep_key(ssid, 2);
1340 }
1341
1342
1343 static char * wpa_config_write_wep_key3(const struct parse_data *data,
1344                                         struct wpa_ssid *ssid)
1345 {
1346         return wpa_config_write_wep_key(ssid, 3);
1347 }
1348 #endif /* NO_CONFIG_WRITE */
1349
1350
1351 /* Helper macros for network block parser */
1352
1353 #ifdef OFFSET
1354 #undef OFFSET
1355 #endif /* OFFSET */
1356 /* OFFSET: Get offset of a variable within the wpa_ssid structure */
1357 #define OFFSET(v) ((void *) &((struct wpa_ssid *) 0)->v)
1358
1359 /* STR: Define a string variable for an ASCII string; f = field name */
1360 #ifdef NO_CONFIG_WRITE
1361 #define _STR(f) #f, wpa_config_parse_str, OFFSET(f)
1362 #define _STRe(f) #f, wpa_config_parse_str, OFFSET(eap.f)
1363 #else /* NO_CONFIG_WRITE */
1364 #define _STR(f) #f, wpa_config_parse_str, wpa_config_write_str, OFFSET(f)
1365 #define _STRe(f) #f, wpa_config_parse_str, wpa_config_write_str, OFFSET(eap.f)
1366 #endif /* NO_CONFIG_WRITE */
1367 #define STR(f) _STR(f), NULL, NULL, NULL, 0
1368 #define STRe(f) _STRe(f), NULL, NULL, NULL, 0
1369 #define STR_KEY(f) _STR(f), NULL, NULL, NULL, 1
1370 #define STR_KEYe(f) _STRe(f), NULL, NULL, NULL, 1
1371
1372 /* STR_LEN: Define a string variable with a separate variable for storing the
1373  * data length. Unlike STR(), this can be used to store arbitrary binary data
1374  * (i.e., even nul termination character). */
1375 #define _STR_LEN(f) _STR(f), OFFSET(f ## _len)
1376 #define _STR_LENe(f) _STRe(f), OFFSET(eap.f ## _len)
1377 #define STR_LEN(f) _STR_LEN(f), NULL, NULL, 0
1378 #define STR_LENe(f) _STR_LENe(f), NULL, NULL, 0
1379 #define STR_LEN_KEY(f) _STR_LEN(f), NULL, NULL, 1
1380
1381 /* STR_RANGE: Like STR_LEN(), but with minimum and maximum allowed length
1382  * explicitly specified. */
1383 #define _STR_RANGE(f, min, max) _STR_LEN(f), (void *) (min), (void *) (max)
1384 #define STR_RANGE(f, min, max) _STR_RANGE(f, min, max), 0
1385 #define STR_RANGE_KEY(f, min, max) _STR_RANGE(f, min, max), 1
1386
1387 #ifdef NO_CONFIG_WRITE
1388 #define _INT(f) #f, wpa_config_parse_int, OFFSET(f), (void *) 0
1389 #define _INTe(f) #f, wpa_config_parse_int, OFFSET(eap.f), (void *) 0
1390 #else /* NO_CONFIG_WRITE */
1391 #define _INT(f) #f, wpa_config_parse_int, wpa_config_write_int, \
1392         OFFSET(f), (void *) 0
1393 #define _INTe(f) #f, wpa_config_parse_int, wpa_config_write_int, \
1394         OFFSET(eap.f), (void *) 0
1395 #endif /* NO_CONFIG_WRITE */
1396
1397 /* INT: Define an integer variable */
1398 #define INT(f) _INT(f), NULL, NULL, 0
1399 #define INTe(f) _INTe(f), NULL, NULL, 0
1400
1401 /* INT_RANGE: Define an integer variable with allowed value range */
1402 #define INT_RANGE(f, min, max) _INT(f), (void *) (min), (void *) (max), 0
1403
1404 /* FUNC: Define a configuration variable that uses a custom function for
1405  * parsing and writing the value. */
1406 #ifdef NO_CONFIG_WRITE
1407 #define _FUNC(f) #f, wpa_config_parse_ ## f, NULL, NULL, NULL, NULL
1408 #else /* NO_CONFIG_WRITE */
1409 #define _FUNC(f) #f, wpa_config_parse_ ## f, wpa_config_write_ ## f, \
1410         NULL, NULL, NULL, NULL
1411 #endif /* NO_CONFIG_WRITE */
1412 #define FUNC(f) _FUNC(f), 0
1413 #define FUNC_KEY(f) _FUNC(f), 1
1414
1415 /*
1416  * Table of network configuration variables. This table is used to parse each
1417  * network configuration variable, e.g., each line in wpa_supplicant.conf file
1418  * that is inside a network block.
1419  *
1420  * This table is generated using the helper macros defined above and with
1421  * generous help from the C pre-processor. The field name is stored as a string
1422  * into .name and for STR and INT types, the offset of the target buffer within
1423  * struct wpa_ssid is stored in .param1. .param2 (if not NULL) is similar
1424  * offset to the field containing the length of the configuration variable.
1425  * .param3 and .param4 can be used to mark the allowed range (length for STR
1426  * and value for INT).
1427  *
1428  * For each configuration line in wpa_supplicant.conf, the parser goes through
1429  * this table and select the entry that matches with the field name. The parser
1430  * function (.parser) is then called to parse the actual value of the field.
1431  *
1432  * This kind of mechanism makes it easy to add new configuration parameters,
1433  * since only one line needs to be added into this table and into the
1434  * struct wpa_ssid definition if the new variable is either a string or
1435  * integer. More complex types will need to use their own parser and writer
1436  * functions.
1437  */
1438 static const struct parse_data ssid_fields[] = {
1439         { STR_RANGE(ssid, 0, MAX_SSID_LEN) },
1440         { INT_RANGE(scan_ssid, 0, 1) },
1441         { FUNC(bssid) },
1442         { FUNC_KEY(psk) },
1443         { FUNC(proto) },
1444         { FUNC(key_mgmt) },
1445         { FUNC(pairwise) },
1446         { FUNC(group) },
1447         { FUNC(auth_alg) },
1448         { FUNC(scan_freq) },
1449         { FUNC(freq_list) },
1450 #ifdef IEEE8021X_EAPOL
1451         { FUNC(eap) },
1452         { STR_LENe(identity) },
1453         { STR_LENe(anonymous_identity) },
1454         { FUNC_KEY(password) },
1455         { STRe(ca_cert) },
1456         { STRe(ca_path) },
1457         { STRe(client_cert) },
1458         { STRe(private_key) },
1459         { STR_KEYe(private_key_passwd) },
1460         { STRe(dh_file) },
1461         { STRe(subject_match) },
1462         { STRe(altsubject_match) },
1463         { STRe(ca_cert2) },
1464         { STRe(ca_path2) },
1465         { STRe(client_cert2) },
1466         { STRe(private_key2) },
1467         { STR_KEYe(private_key2_passwd) },
1468         { STRe(dh_file2) },
1469         { STRe(subject_match2) },
1470         { STRe(altsubject_match2) },
1471         { STRe(phase1) },
1472         { STRe(phase2) },
1473         { STRe(pcsc) },
1474         { STR_KEYe(pin) },
1475         { STRe(engine_id) },
1476         { STRe(key_id) },
1477         { STRe(cert_id) },
1478         { STRe(ca_cert_id) },
1479         { STR_KEYe(pin2) },
1480         { STRe(engine2_id) },
1481         { STRe(key2_id) },
1482         { STRe(cert2_id) },
1483         { STRe(ca_cert2_id) },
1484         { INTe(engine) },
1485         { INTe(engine2) },
1486         { INT(eapol_flags) },
1487 #endif /* IEEE8021X_EAPOL */
1488         { FUNC_KEY(wep_key0) },
1489         { FUNC_KEY(wep_key1) },
1490         { FUNC_KEY(wep_key2) },
1491         { FUNC_KEY(wep_key3) },
1492         { INT(wep_tx_keyidx) },
1493         { INT(priority) },
1494 #ifdef IEEE8021X_EAPOL
1495         { INT(eap_workaround) },
1496         { STRe(pac_file) },
1497         { INTe(fragment_size) },
1498 #endif /* IEEE8021X_EAPOL */
1499         { INT_RANGE(mode, 0, 2) },
1500         { INT_RANGE(proactive_key_caching, 0, 1) },
1501         { INT_RANGE(disabled, 0, 1) },
1502         { STR(id_str) },
1503 #ifdef CONFIG_IEEE80211W
1504         { INT_RANGE(ieee80211w, 0, 2) },
1505 #endif /* CONFIG_IEEE80211W */
1506         { INT_RANGE(peerkey, 0, 1) },
1507         { INT_RANGE(mixed_cell, 0, 1) },
1508         { INT_RANGE(frequency, 0, 10000) },
1509         { INT(wpa_ptk_rekey) },
1510         { STR(bgscan) },
1511 };
1512
1513 #undef OFFSET
1514 #undef _STR
1515 #undef STR
1516 #undef STR_KEY
1517 #undef _STR_LEN
1518 #undef STR_LEN
1519 #undef STR_LEN_KEY
1520 #undef _STR_RANGE
1521 #undef STR_RANGE
1522 #undef STR_RANGE_KEY
1523 #undef _INT
1524 #undef INT
1525 #undef INT_RANGE
1526 #undef _FUNC
1527 #undef FUNC
1528 #undef FUNC_KEY
1529 #define NUM_SSID_FIELDS (sizeof(ssid_fields) / sizeof(ssid_fields[0]))
1530
1531
1532 /**
1533  * wpa_config_add_prio_network - Add a network to priority lists
1534  * @config: Configuration data from wpa_config_read()
1535  * @ssid: Pointer to the network configuration to be added to the list
1536  * Returns: 0 on success, -1 on failure
1537  *
1538  * This function is used to add a network block to the priority list of
1539  * networks. This must be called for each network when reading in the full
1540  * configuration. In addition, this can be used indirectly when updating
1541  * priorities by calling wpa_config_update_prio_list().
1542  */
1543 int wpa_config_add_prio_network(struct wpa_config *config,
1544                                 struct wpa_ssid *ssid)
1545 {
1546         int prio;
1547         struct wpa_ssid *prev, **nlist;
1548
1549         /*
1550          * Add to an existing priority list if one is available for the
1551          * configured priority level for this network.
1552          */
1553         for (prio = 0; prio < config->num_prio; prio++) {
1554                 prev = config->pssid[prio];
1555                 if (prev->priority == ssid->priority) {
1556                         while (prev->pnext)
1557                                 prev = prev->pnext;
1558                         prev->pnext = ssid;
1559                         return 0;
1560                 }
1561         }
1562
1563         /* First network for this priority - add a new priority list */
1564         nlist = os_realloc(config->pssid,
1565                            (config->num_prio + 1) * sizeof(struct wpa_ssid *));
1566         if (nlist == NULL)
1567                 return -1;
1568
1569         for (prio = 0; prio < config->num_prio; prio++) {
1570                 if (nlist[prio]->priority < ssid->priority)
1571                         break;
1572         }
1573
1574         os_memmove(&nlist[prio + 1], &nlist[prio],
1575                    (config->num_prio - prio) * sizeof(struct wpa_ssid *));
1576
1577         nlist[prio] = ssid;
1578         config->num_prio++;
1579         config->pssid = nlist;
1580
1581         return 0;
1582 }
1583
1584
1585 /**
1586  * wpa_config_update_prio_list - Update network priority list
1587  * @config: Configuration data from wpa_config_read()
1588  * Returns: 0 on success, -1 on failure
1589  *
1590  * This function is called to update the priority list of networks in the
1591  * configuration when a network is being added or removed. This is also called
1592  * if a priority for a network is changed.
1593  */
1594 int wpa_config_update_prio_list(struct wpa_config *config)
1595 {
1596         struct wpa_ssid *ssid;
1597         int ret = 0;
1598
1599         os_free(config->pssid);
1600         config->pssid = NULL;
1601         config->num_prio = 0;
1602
1603         ssid = config->ssid;
1604         while (ssid) {
1605                 ssid->pnext = NULL;
1606                 if (wpa_config_add_prio_network(config, ssid) < 0)
1607                         ret = -1;
1608                 ssid = ssid->next;
1609         }
1610
1611         return ret;
1612 }
1613
1614
1615 #ifdef IEEE8021X_EAPOL
1616 static void eap_peer_config_free(struct eap_peer_config *eap)
1617 {
1618         os_free(eap->eap_methods);
1619         os_free(eap->identity);
1620         os_free(eap->anonymous_identity);
1621         os_free(eap->password);
1622         os_free(eap->ca_cert);
1623         os_free(eap->ca_path);
1624         os_free(eap->client_cert);
1625         os_free(eap->private_key);
1626         os_free(eap->private_key_passwd);
1627         os_free(eap->dh_file);
1628         os_free(eap->subject_match);
1629         os_free(eap->altsubject_match);
1630         os_free(eap->ca_cert2);
1631         os_free(eap->ca_path2);
1632         os_free(eap->client_cert2);
1633         os_free(eap->private_key2);
1634         os_free(eap->private_key2_passwd);
1635         os_free(eap->dh_file2);
1636         os_free(eap->subject_match2);
1637         os_free(eap->altsubject_match2);
1638         os_free(eap->phase1);
1639         os_free(eap->phase2);
1640         os_free(eap->pcsc);
1641         os_free(eap->pin);
1642         os_free(eap->engine_id);
1643         os_free(eap->key_id);
1644         os_free(eap->cert_id);
1645         os_free(eap->ca_cert_id);
1646         os_free(eap->key2_id);
1647         os_free(eap->cert2_id);
1648         os_free(eap->ca_cert2_id);
1649         os_free(eap->pin2);
1650         os_free(eap->engine2_id);
1651         os_free(eap->otp);
1652         os_free(eap->pending_req_otp);
1653         os_free(eap->pac_file);
1654         os_free(eap->new_password);
1655 }
1656 #endif /* IEEE8021X_EAPOL */
1657
1658
1659 /**
1660  * wpa_config_free_ssid - Free network/ssid configuration data
1661  * @ssid: Configuration data for the network
1662  *
1663  * This function frees all resources allocated for the network configuration
1664  * data.
1665  */
1666 void wpa_config_free_ssid(struct wpa_ssid *ssid)
1667 {
1668         os_free(ssid->ssid);
1669         os_free(ssid->passphrase);
1670 #ifdef IEEE8021X_EAPOL
1671         eap_peer_config_free(&ssid->eap);
1672 #endif /* IEEE8021X_EAPOL */
1673         os_free(ssid->id_str);
1674         os_free(ssid->scan_freq);
1675         os_free(ssid->freq_list);
1676         os_free(ssid->bgscan);
1677         os_free(ssid);
1678 }
1679
1680
1681 /**
1682  * wpa_config_free - Free configuration data
1683  * @config: Configuration data from wpa_config_read()
1684  *
1685  * This function frees all resources allocated for the configuration data by
1686  * wpa_config_read().
1687  */
1688 void wpa_config_free(struct wpa_config *config)
1689 {
1690 #ifndef CONFIG_NO_CONFIG_BLOBS
1691         struct wpa_config_blob *blob, *prevblob;
1692 #endif /* CONFIG_NO_CONFIG_BLOBS */
1693         struct wpa_ssid *ssid, *prev = NULL;
1694         ssid = config->ssid;
1695         while (ssid) {
1696                 prev = ssid;
1697                 ssid = ssid->next;
1698                 wpa_config_free_ssid(prev);
1699         }
1700
1701 #ifndef CONFIG_NO_CONFIG_BLOBS
1702         blob = config->blobs;
1703         prevblob = NULL;
1704         while (blob) {
1705                 prevblob = blob;
1706                 blob = blob->next;
1707                 wpa_config_free_blob(prevblob);
1708         }
1709 #endif /* CONFIG_NO_CONFIG_BLOBS */
1710
1711         os_free(config->ctrl_interface);
1712         os_free(config->ctrl_interface_group);
1713         os_free(config->opensc_engine_path);
1714         os_free(config->pkcs11_engine_path);
1715         os_free(config->pkcs11_module_path);
1716         os_free(config->driver_param);
1717         os_free(config->device_name);
1718         os_free(config->manufacturer);
1719         os_free(config->model_name);
1720         os_free(config->model_number);
1721         os_free(config->serial_number);
1722         os_free(config->device_type);
1723         os_free(config->config_methods);
1724         os_free(config->pssid);
1725         os_free(config);
1726 }
1727
1728
1729 /**
1730  * wpa_config_get_network - Get configured network based on id
1731  * @config: Configuration data from wpa_config_read()
1732  * @id: Unique network id to search for
1733  * Returns: Network configuration or %NULL if not found
1734  */
1735 struct wpa_ssid * wpa_config_get_network(struct wpa_config *config, int id)
1736 {
1737         struct wpa_ssid *ssid;
1738
1739         ssid = config->ssid;
1740         while (ssid) {
1741                 if (id == ssid->id)
1742                         break;
1743                 ssid = ssid->next;
1744         }
1745
1746         return ssid;
1747 }
1748
1749
1750 /**
1751  * wpa_config_add_network - Add a new network with empty configuration
1752  * @config: Configuration data from wpa_config_read()
1753  * Returns: The new network configuration or %NULL if operation failed
1754  */
1755 struct wpa_ssid * wpa_config_add_network(struct wpa_config *config)
1756 {
1757         int id;
1758         struct wpa_ssid *ssid, *last = NULL;
1759
1760         id = -1;
1761         ssid = config->ssid;
1762         while (ssid) {
1763                 if (ssid->id > id)
1764                         id = ssid->id;
1765                 last = ssid;
1766                 ssid = ssid->next;
1767         }
1768         id++;
1769
1770         ssid = os_zalloc(sizeof(*ssid));
1771         if (ssid == NULL)
1772                 return NULL;
1773         ssid->id = id;
1774         if (last)
1775                 last->next = ssid;
1776         else
1777                 config->ssid = ssid;
1778
1779         wpa_config_update_prio_list(config);
1780
1781         return ssid;
1782 }
1783
1784
1785 /**
1786  * wpa_config_remove_network - Remove a configured network based on id
1787  * @config: Configuration data from wpa_config_read()
1788  * @id: Unique network id to search for
1789  * Returns: 0 on success, or -1 if the network was not found
1790  */
1791 int wpa_config_remove_network(struct wpa_config *config, int id)
1792 {
1793         struct wpa_ssid *ssid, *prev = NULL;
1794
1795         ssid = config->ssid;
1796         while (ssid) {
1797                 if (id == ssid->id)
1798                         break;
1799                 prev = ssid;
1800                 ssid = ssid->next;
1801         }
1802
1803         if (ssid == NULL)
1804                 return -1;
1805
1806         if (prev)
1807                 prev->next = ssid->next;
1808         else
1809                 config->ssid = ssid->next;
1810
1811         wpa_config_update_prio_list(config);
1812         wpa_config_free_ssid(ssid);
1813         return 0;
1814 }
1815
1816
1817 /**
1818  * wpa_config_set_network_defaults - Set network default values
1819  * @ssid: Pointer to network configuration data
1820  */
1821 void wpa_config_set_network_defaults(struct wpa_ssid *ssid)
1822 {
1823         ssid->proto = DEFAULT_PROTO;
1824         ssid->pairwise_cipher = DEFAULT_PAIRWISE;
1825         ssid->group_cipher = DEFAULT_GROUP;
1826         ssid->key_mgmt = DEFAULT_KEY_MGMT;
1827 #ifdef IEEE8021X_EAPOL
1828         ssid->eapol_flags = DEFAULT_EAPOL_FLAGS;
1829         ssid->eap_workaround = DEFAULT_EAP_WORKAROUND;
1830         ssid->eap.fragment_size = DEFAULT_FRAGMENT_SIZE;
1831 #endif /* IEEE8021X_EAPOL */
1832 }
1833
1834
1835 /**
1836  * wpa_config_set - Set a variable in network configuration
1837  * @ssid: Pointer to network configuration data
1838  * @var: Variable name, e.g., "ssid"
1839  * @value: Variable value
1840  * @line: Line number in configuration file or 0 if not used
1841  * Returns: 0 on success, -1 on failure
1842  *
1843  * This function can be used to set network configuration variables based on
1844  * both the configuration file and management interface input. The value
1845  * parameter must be in the same format as the text-based configuration file is
1846  * using. For example, strings are using double quotation marks.
1847  */
1848 int wpa_config_set(struct wpa_ssid *ssid, const char *var, const char *value,
1849                    int line)
1850 {
1851         size_t i;
1852         int ret = 0;
1853
1854         if (ssid == NULL || var == NULL || value == NULL)
1855                 return -1;
1856
1857         for (i = 0; i < NUM_SSID_FIELDS; i++) {
1858                 const struct parse_data *field = &ssid_fields[i];
1859                 if (os_strcmp(var, field->name) != 0)
1860                         continue;
1861
1862                 if (field->parser(field, ssid, line, value)) {
1863                         if (line) {
1864                                 wpa_printf(MSG_ERROR, "Line %d: failed to "
1865                                            "parse %s '%s'.", line, var, value);
1866                         }
1867                         ret = -1;
1868                 }
1869                 break;
1870         }
1871         if (i == NUM_SSID_FIELDS) {
1872                 if (line) {
1873                         wpa_printf(MSG_ERROR, "Line %d: unknown network field "
1874                                    "'%s'.", line, var);
1875                 }
1876                 ret = -1;
1877         }
1878
1879         return ret;
1880 }
1881
1882
1883 #ifndef NO_CONFIG_WRITE
1884 /**
1885  * wpa_config_get_all - Get all options from network configuration
1886  * @ssid: Pointer to network configuration data
1887  * @get_keys: Determines if keys/passwords will be included in returned list
1888  * Returns: %NULL terminated list of all set keys and their values in the form
1889  * of [key1, val1, key2, val2, ... , NULL]
1890  *
1891  * This function can be used to get list of all configured network properties.
1892  * The caller is responsible for freeing the returned list and all its
1893  * elements.
1894  */
1895 char ** wpa_config_get_all(struct wpa_ssid *ssid, int get_keys)
1896 {
1897         const struct parse_data *field;
1898         char *key, *value;
1899         size_t i;
1900         char **props;
1901         int fields_num;
1902
1903         props = os_zalloc(sizeof(char *) * ((2 * NUM_SSID_FIELDS) + 1));
1904         if (!props)
1905                 return NULL;
1906
1907         fields_num = 0;
1908         for (i = 0; i < NUM_SSID_FIELDS; i++) {
1909                 field = &ssid_fields[i];
1910                 if (field->key_data && !get_keys)
1911                         continue;
1912                 value = field->writer(field, ssid);
1913                 if (value == NULL)
1914                         continue;
1915                 if (os_strlen(value) == 0) {
1916                         os_free(value);
1917                         continue;
1918                 }
1919
1920                 key = os_strdup(field->name);
1921                 if (key == NULL) {
1922                         os_free(value);
1923                         goto err;
1924                 }
1925
1926                 props[fields_num * 2] = key;
1927                 props[fields_num * 2 + 1] = value;
1928
1929                 fields_num++;
1930         }
1931
1932         return props;
1933
1934 err:
1935         value = *props;
1936         while (value)
1937                 os_free(value++);
1938         os_free(props);
1939         return NULL;
1940 }
1941
1942
1943 /**
1944  * wpa_config_get - Get a variable in network configuration
1945  * @ssid: Pointer to network configuration data
1946  * @var: Variable name, e.g., "ssid"
1947  * Returns: Value of the variable or %NULL on failure
1948  *
1949  * This function can be used to get network configuration variables. The
1950  * returned value is a copy of the configuration variable in text format, i.e,.
1951  * the same format that the text-based configuration file and wpa_config_set()
1952  * are using for the value. The caller is responsible for freeing the returned
1953  * value.
1954  */
1955 char * wpa_config_get(struct wpa_ssid *ssid, const char *var)
1956 {
1957         size_t i;
1958
1959         if (ssid == NULL || var == NULL)
1960                 return NULL;
1961
1962         for (i = 0; i < NUM_SSID_FIELDS; i++) {
1963                 const struct parse_data *field = &ssid_fields[i];
1964                 if (os_strcmp(var, field->name) == 0)
1965                         return field->writer(field, ssid);
1966         }
1967
1968         return NULL;
1969 }
1970
1971
1972 /**
1973  * wpa_config_get_no_key - Get a variable in network configuration (no keys)
1974  * @ssid: Pointer to network configuration data
1975  * @var: Variable name, e.g., "ssid"
1976  * Returns: Value of the variable or %NULL on failure
1977  *
1978  * This function can be used to get network configuration variable like
1979  * wpa_config_get(). The only difference is that this functions does not expose
1980  * key/password material from the configuration. In case a key/password field
1981  * is requested, the returned value is an empty string or %NULL if the variable
1982  * is not set or "*" if the variable is set (regardless of its value). The
1983  * returned value is a copy of the configuration variable in text format, i.e,.
1984  * the same format that the text-based configuration file and wpa_config_set()
1985  * are using for the value. The caller is responsible for freeing the returned
1986  * value.
1987  */
1988 char * wpa_config_get_no_key(struct wpa_ssid *ssid, const char *var)
1989 {
1990         size_t i;
1991
1992         if (ssid == NULL || var == NULL)
1993                 return NULL;
1994
1995         for (i = 0; i < NUM_SSID_FIELDS; i++) {
1996                 const struct parse_data *field = &ssid_fields[i];
1997                 if (os_strcmp(var, field->name) == 0) {
1998                         char *res = field->writer(field, ssid);
1999                         if (field->key_data) {
2000                                 if (res && res[0]) {
2001                                         wpa_printf(MSG_DEBUG, "Do not allow "
2002                                                    "key_data field to be "
2003                                                    "exposed");
2004                                         os_free(res);
2005                                         return os_strdup("*");
2006                                 }
2007
2008                                 os_free(res);
2009                                 return NULL;
2010                         }
2011                         return res;
2012                 }
2013         }
2014
2015         return NULL;
2016 }
2017 #endif /* NO_CONFIG_WRITE */
2018
2019
2020 /**
2021  * wpa_config_update_psk - Update WPA PSK based on passphrase and SSID
2022  * @ssid: Pointer to network configuration data
2023  *
2024  * This function must be called to update WPA PSK when either SSID or the
2025  * passphrase has changed for the network configuration.
2026  */
2027 void wpa_config_update_psk(struct wpa_ssid *ssid)
2028 {
2029 #ifndef CONFIG_NO_PBKDF2
2030         pbkdf2_sha1(ssid->passphrase,
2031                     (char *) ssid->ssid, ssid->ssid_len, 4096,
2032                     ssid->psk, PMK_LEN);
2033         wpa_hexdump_key(MSG_MSGDUMP, "PSK (from passphrase)",
2034                         ssid->psk, PMK_LEN);
2035         ssid->psk_set = 1;
2036 #endif /* CONFIG_NO_PBKDF2 */
2037 }
2038
2039
2040 #ifndef CONFIG_NO_CONFIG_BLOBS
2041 /**
2042  * wpa_config_get_blob - Get a named configuration blob
2043  * @config: Configuration data from wpa_config_read()
2044  * @name: Name of the blob
2045  * Returns: Pointer to blob data or %NULL if not found
2046  */
2047 const struct wpa_config_blob * wpa_config_get_blob(struct wpa_config *config,
2048                                                    const char *name)
2049 {
2050         struct wpa_config_blob *blob = config->blobs;
2051
2052         while (blob) {
2053                 if (os_strcmp(blob->name, name) == 0)
2054                         return blob;
2055                 blob = blob->next;
2056         }
2057         return NULL;
2058 }
2059
2060
2061 /**
2062  * wpa_config_set_blob - Set or add a named configuration blob
2063  * @config: Configuration data from wpa_config_read()
2064  * @blob: New value for the blob
2065  *
2066  * Adds a new configuration blob or replaces the current value of an existing
2067  * blob.
2068  */
2069 void wpa_config_set_blob(struct wpa_config *config,
2070                          struct wpa_config_blob *blob)
2071 {
2072         wpa_config_remove_blob(config, blob->name);
2073         blob->next = config->blobs;
2074         config->blobs = blob;
2075 }
2076
2077
2078 /**
2079  * wpa_config_free_blob - Free blob data
2080  * @blob: Pointer to blob to be freed
2081  */
2082 void wpa_config_free_blob(struct wpa_config_blob *blob)
2083 {
2084         if (blob) {
2085                 os_free(blob->name);
2086                 os_free(blob->data);
2087                 os_free(blob);
2088         }
2089 }
2090
2091
2092 /**
2093  * wpa_config_remove_blob - Remove a named configuration blob
2094  * @config: Configuration data from wpa_config_read()
2095  * @name: Name of the blob to remove
2096  * Returns: 0 if blob was removed or -1 if blob was not found
2097  */
2098 int wpa_config_remove_blob(struct wpa_config *config, const char *name)
2099 {
2100         struct wpa_config_blob *pos = config->blobs, *prev = NULL;
2101
2102         while (pos) {
2103                 if (os_strcmp(pos->name, name) == 0) {
2104                         if (prev)
2105                                 prev->next = pos->next;
2106                         else
2107                                 config->blobs = pos->next;
2108                         wpa_config_free_blob(pos);
2109                         return 0;
2110                 }
2111                 prev = pos;
2112                 pos = pos->next;
2113         }
2114
2115         return -1;
2116 }
2117 #endif /* CONFIG_NO_CONFIG_BLOBS */
2118
2119
2120 /**
2121  * wpa_config_alloc_empty - Allocate an empty configuration
2122  * @ctrl_interface: Control interface parameters, e.g., path to UNIX domain
2123  * socket
2124  * @driver_param: Driver parameters
2125  * Returns: Pointer to allocated configuration data or %NULL on failure
2126  */
2127 struct wpa_config * wpa_config_alloc_empty(const char *ctrl_interface,
2128                                            const char *driver_param)
2129 {
2130         struct wpa_config *config;
2131
2132         config = os_zalloc(sizeof(*config));
2133         if (config == NULL)
2134                 return NULL;
2135         config->eapol_version = DEFAULT_EAPOL_VERSION;
2136         config->ap_scan = DEFAULT_AP_SCAN;
2137         config->fast_reauth = DEFAULT_FAST_REAUTH;
2138         config->bss_max_count = DEFAULT_BSS_MAX_COUNT;
2139
2140         if (ctrl_interface)
2141                 config->ctrl_interface = os_strdup(ctrl_interface);
2142         if (driver_param)
2143                 config->driver_param = os_strdup(driver_param);
2144
2145         return config;
2146 }
2147
2148
2149 #ifndef CONFIG_NO_STDOUT_DEBUG
2150 /**
2151  * wpa_config_debug_dump_networks - Debug dump of configured networks
2152  * @config: Configuration data from wpa_config_read()
2153  */
2154 void wpa_config_debug_dump_networks(struct wpa_config *config)
2155 {
2156         int prio;
2157         struct wpa_ssid *ssid;
2158
2159         for (prio = 0; prio < config->num_prio; prio++) {
2160                 ssid = config->pssid[prio];
2161                 wpa_printf(MSG_DEBUG, "Priority group %d",
2162                            ssid->priority);
2163                 while (ssid) {
2164                         wpa_printf(MSG_DEBUG, "   id=%d ssid='%s'",
2165                                    ssid->id,
2166                                    wpa_ssid_txt(ssid->ssid, ssid->ssid_len));
2167                         ssid = ssid->pnext;
2168                 }
2169         }
2170 }
2171 #endif /* CONFIG_NO_STDOUT_DEBUG */