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