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 } 271