contrib/hostapd/src/ap/eap_user_db.c

   1 /*
   2  * hostapd / EAP user database
   3  * Copyright (c) 2012, Jouni Malinen <j@w1.fi>
   4  *
   5  * This software may be distributed under the terms of the BSD license.
   6  * See README for more details.
   7  */
   8
   9 #include "includes.h"
  10 #ifdef CONFIG_SQLITE
  11 #include <sqlite3.h>
  12 #endif /* CONFIG_SQLITE */
  13
  14 #include "common.h"
  15 #include "eap_common/eap_wsc_common.h"
  16 #include "eap_server/eap_methods.h"
  17 #include "eap_server/eap.h"
  18 #include "ap_config.h"
  19 #include "hostapd.h"
  20
  21 #ifdef CONFIG_SQLITE
  22
  23 static void set_user_methods(struct hostapd_eap_user *user, const char *methods)
  24 {
  25         char *buf, *start;
  26         int num_methods;
  27
  28         buf = os_strdup(methods);
  29         if (buf == NULL)
  30                 return;
  31
  32         os_memset(&user->methods, 0, sizeof(user->methods));
  33         num_methods = 0;
  34         start = buf;
  35         while (*start) {
  36                 char *pos3 = os_strchr(start, ',');
  37                 if (pos3)
  38                         *pos3++ = '\0';
  39                 user->methods[num_methods].method =
  40                         eap_server_get_type(start,
  41                                             &user->methods[num_methods].vendor);
  42                 if (user->methods[num_methods].vendor == EAP_VENDOR_IETF &&
  43                     user->methods[num_methods].method == EAP_TYPE_NONE) {
  44                         if (os_strcmp(start, "TTLS-PAP") == 0) {
  45                                 user->ttls_auth |= EAP_TTLS_AUTH_PAP;
  46                                 goto skip_eap;
  47                         }
  48                         if (os_strcmp(start, "TTLS-CHAP") == 0) {
  49                                 user->ttls_auth |= EAP_TTLS_AUTH_CHAP;
  50                                 goto skip_eap;
  51                         }
  52                         if (os_strcmp(start, "TTLS-MSCHAP") == 0) {
  53                                 user->ttls_auth |= EAP_TTLS_AUTH_MSCHAP;
  54                                 goto skip_eap;
  55                         }
  56                         if (os_strcmp(start, "TTLS-MSCHAPV2") == 0) {
  57                                 user->ttls_auth |= EAP_TTLS_AUTH_MSCHAPV2;
  58                                 goto skip_eap;
  59                         }
  60                         wpa_printf(MSG_INFO, "DB: Unsupported EAP type '%s'",
  61                                    start);
  62                         os_free(buf);
  63                         return;
  64                 }
  65
  66                 num_methods++;
  67                 if (num_methods >= EAP_MAX_METHODS)
  68                         break;
  69         skip_eap:
  70                 if (pos3 == NULL)
  71                         break;
  72                 start = pos3;
  73         }
  74
  75         os_free(buf);
  76 }
  77
  78
  79 static int get_user_cb(void *ctx, int argc, char *argv[], char *col[])
  80 {
  81         struct hostapd_eap_user *user = ctx;
  82         int i;
  83
  84         for (i = 0; i < argc; i++) {
  85                 if (os_strcmp(col[i], "password") == 0 && argv[i]) {
  86                         os_free(user->password);
  87                         user->password_len = os_strlen(argv[i]);
  88                         user->password = (u8 *) os_strdup(argv[i]);
  89                         user->next = (void *) 1;
  90                 } else if (os_strcmp(col[i], "methods") == 0 && argv[i]) {
  91                         set_user_methods(user, argv[i]);
  92                 }
  93         }
  94
  95         return 0;
  96 }
  97
  98
  99 static int get_wildcard_cb(void *ctx, int argc, char *argv[], char *col[])
 100 {
 101         struct hostapd_eap_user *user = ctx;
 102         int i, id = -1, methods = -1;
 103         size_t len;
 104
 105         for (i = 0; i < argc; i++) {
 106                 if (os_strcmp(col[i], "identity") == 0 && argv[i])
 107                         id = i;
 108                 else if (os_strcmp(col[i], "methods") == 0 && argv[i])
 109                         methods = i;
 110         }
 111
 112         if (id < 0 || methods < 0)
 113                 return 0;
 114
 115         len = os_strlen(argv[id]);
 116         if (len <= user->identity_len &&
 117             os_memcmp(argv[id], user->identity, len) == 0 &&
 118             (user->password == NULL || len > user->password_len)) {
 119                 os_free(user->password);
 120                 user->password_len = os_strlen(argv[id]);
 121                 user->password = (u8 *) os_strdup(argv[id]);
 122                 user->next = (void *) 1;
 123                 set_user_methods(user, argv[methods]);
 124         }
 125
 126         return 0;
 127 }
 128
 129
 130 static const struct hostapd_eap_user *
 131 eap_user_sqlite_get(struct hostapd_data *hapd, const u8 *identity,
 132                     size_t identity_len, int phase2)
 133 {
 134         sqlite3 *db;
 135         struct hostapd_eap_user *user = NULL;
 136         char id_str[256], cmd[300];
 137         size_t i;
 138
 139         if (identity_len >= sizeof(id_str))
 140                 return NULL;
 141         os_memcpy(id_str, identity, identity_len);
 142         id_str[identity_len] = '\0';
 143         for (i = 0; i < identity_len; i++) {
 144                 if (id_str[i] >= 'a' && id_str[i] <= 'z')
 145                         continue;
 146                 if (id_str[i] >= 'A' && id_str[i] <= 'Z')
 147                         continue;
 148                 if (id_str[i] >= '0' && id_str[i] <= '9')
 149                         continue;
 150                 if (id_str[i] == '-' || id_str[i] == '_' || id_str[i] == '.' ||
 151                     id_str[i] == ',' || id_str[i] == '@' || id_str[i] == '\\' ||
 152                     id_str[i] == '!' || id_str[i] == '#' || id_str[i] == '%' ||
 153                     id_str[i] == '=' || id_str[i] == ' ')
 154                         continue;
 155                 wpa_printf(MSG_INFO, "DB: Unsupported character in identity");
 156                 return NULL;
 157         }
 158
 159         os_free(hapd->tmp_eap_user.identity);
 160         os_free(hapd->tmp_eap_user.password);
 161         os_memset(&hapd->tmp_eap_user, 0, sizeof(hapd->tmp_eap_user));
 162         hapd->tmp_eap_user.phase2 = phase2;
 163         hapd->tmp_eap_user.identity = os_zalloc(identity_len + 1);
 164         if (hapd->tmp_eap_user.identity == NULL)
 165                 return NULL;
 166         os_memcpy(hapd->tmp_eap_user.identity, identity, identity_len);
 167
 168         if (sqlite3_open(hapd->conf->eap_user_sqlite, &db)) {
 169                 wpa_printf(MSG_INFO, "DB: Failed to open database %s: %s",
 170                            hapd->conf->eap_user_sqlite, sqlite3_errmsg(db));
 171                 sqlite3_close(db);
 172                 return NULL;
 173         }
 174
 175         os_snprintf(cmd, sizeof(cmd),
 176                     "SELECT password,methods FROM users WHERE "
 177                     "identity='%s' AND phase2=%d;", id_str, phase2);
 178         wpa_printf(MSG_DEBUG, "DB: %s", cmd);
 179         if (sqlite3_exec(db, cmd, get_user_cb, &hapd->tmp_eap_user, NULL) !=
 180             SQLITE_OK) {
 181                 wpa_printf(MSG_DEBUG, "DB: Failed to complete SQL operation");
 182         } else if (hapd->tmp_eap_user.next)
 183                 user = &hapd->tmp_eap_user;
 184
 185         if (user == NULL && !phase2) {
 186                 os_snprintf(cmd, sizeof(cmd),
 187                             "SELECT identity,methods FROM wildcards;");
 188                 wpa_printf(MSG_DEBUG, "DB: %s", cmd);
 189                 if (sqlite3_exec(db, cmd, get_wildcard_cb, &hapd->tmp_eap_user,
 190                                  NULL) != SQLITE_OK) {
 191                         wpa_printf(MSG_DEBUG, "DB: Failed to complete SQL "
 192                                    "operation");
 193                 } else if (hapd->tmp_eap_user.next) {
 194                         user = &hapd->tmp_eap_user;
 195                         os_free(user->identity);
 196                         user->identity = user->password;
 197                         user->identity_len = user->password_len;
 198                         user->password = NULL;
 199                         user->password_len = 0;
 200                 }
 201         }
 202
 203         sqlite3_close(db);
 204
 205         return user;
 206 }
 207
 208 #endif /* CONFIG_SQLITE */
 209
 210
 211 const struct hostapd_eap_user *
 212 hostapd_get_eap_user(struct hostapd_data *hapd, const u8 *identity,
 213                      size_t identity_len, int phase2)
 214 {
 215         const struct hostapd_bss_config *conf = hapd->conf;
 216         struct hostapd_eap_user *user = conf->eap_user;
 217
 218 #ifdef CONFIG_WPS
 219         if (conf->wps_state && identity_len == WSC_ID_ENROLLEE_LEN &&
 220             os_memcmp(identity, WSC_ID_ENROLLEE, WSC_ID_ENROLLEE_LEN) == 0) {
 221                 static struct hostapd_eap_user wsc_enrollee;
 222                 os_memset(&wsc_enrollee, 0, sizeof(wsc_enrollee));
 223                 wsc_enrollee.methods[0].method = eap_server_get_type(
 224                         "WSC", &wsc_enrollee.methods[0].vendor);
 225                 return &wsc_enrollee;
 226         }
 227
 228         if (conf->wps_state && identity_len == WSC_ID_REGISTRAR_LEN &&
 229             os_memcmp(identity, WSC_ID_REGISTRAR, WSC_ID_REGISTRAR_LEN) == 0) {
 230                 static struct hostapd_eap_user wsc_registrar;
 231                 os_memset(&wsc_registrar, 0, sizeof(wsc_registrar));
 232                 wsc_registrar.methods[0].method = eap_server_get_type(
 233                         "WSC", &wsc_registrar.methods[0].vendor);
 234                 wsc_registrar.password = (u8 *) conf->ap_pin;
 235                 wsc_registrar.password_len = conf->ap_pin ?
 236                         os_strlen(conf->ap_pin) : 0;
 237                 return &wsc_registrar;
 238         }
 239 #endif /* CONFIG_WPS */
 240
 241         while (user) {
 242                 if (!phase2 && user->identity == NULL) {
 243                         /* Wildcard match */
 244                         break;
 245                 }
 246
 247                 if (user->phase2 == !!phase2 && user->wildcard_prefix &&
 248                     identity_len >= user->identity_len &&
 249                     os_memcmp(user->identity, identity, user->identity_len) ==
 250                     0) {
 251                         /* Wildcard prefix match */
 252                         break;
 253                 }
 254
 255                 if (user->phase2 == !!phase2 &&
 256                     user->identity_len == identity_len &&
 257                     os_memcmp(user->identity, identity, identity_len) == 0)
 258                         break;
 259                 user = user->next;
 260         }
 261
 262 #ifdef CONFIG_SQLITE
 263         if (user == NULL && conf->eap_user_sqlite) {
 264                 return eap_user_sqlite_get(hapd, identity, identity_len,
 265                                            phase2);
 266         }
 267 #endif /* CONFIG_SQLITE */
 268
 269         return user;
 270 }