hostap/src/ap/eap_user_db.c

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/*
* hostapd / EAP user database
* Copyright (c) 2012, Jouni Malinen <j@w1.fi>
*
* This software may be distributed under the terms of the BSD license.
* See README for more details.
*/
#include "includes.h"
#ifdef CONFIG_SQLITE
#include <sqlite3.h>
#endif /* CONFIG_SQLITE */
#include "common.h"
#include "eap_common/eap_wsc_common.h"
#include "eap_server/eap_methods.h"
#include "eap_server/eap.h"
#include "ap_config.h"
#include "hostapd.h"
#ifdef CONFIG_SQLITE
static void set_user_methods(struct hostapd_eap_user *user, const char *methods)
{
char *buf, *start;
int num_methods;
buf = os_strdup(methods);
if (buf == NULL)
return;
os_memset(&user->methods, 0, sizeof(user->methods));
num_methods = 0;
start = buf;
while (*start) {
char *pos3 = os_strchr(start, ',');
if (pos3)
*pos3++ = '\0';
user->methods[num_methods].method =
eap_server_get_type(start,
&user->methods[num_methods].vendor);
if (user->methods[num_methods].vendor == EAP_VENDOR_IETF &&
user->methods[num_methods].method == EAP_TYPE_NONE) {
if (os_strcmp(start, "TTLS-PAP") == 0) {
user->ttls_auth |= EAP_TTLS_AUTH_PAP;
goto skip_eap;
}
if (os_strcmp(start, "TTLS-CHAP") == 0) {
user->ttls_auth |= EAP_TTLS_AUTH_CHAP;
goto skip_eap;
}
if (os_strcmp(start, "TTLS-MSCHAP") == 0) {
user->ttls_auth |= EAP_TTLS_AUTH_MSCHAP;
goto skip_eap;
}
if (os_strcmp(start, "TTLS-MSCHAPV2") == 0) {
user->ttls_auth |= EAP_TTLS_AUTH_MSCHAPV2;
goto skip_eap;
}
wpa_printf(MSG_INFO, "DB: Unsupported EAP type '%s'",
start);
os_free(buf);
return;
}
num_methods++;
if (num_methods >= EAP_MAX_METHODS)
break;
skip_eap:
if (pos3 == NULL)
break;
start = pos3;
}
os_free(buf);
}
static int get_user_cb(void *ctx, int argc, char *argv[], char *col[])
{
struct hostapd_eap_user *user = ctx;
int i;
for (i = 0; i < argc; i++) {
if (os_strcmp(col[i], "password") == 0 && argv[i]) {
bin_clear_free(user->password, user->password_len);
user->password_len = os_strlen(argv[i]);
user->password = (u8 *) os_strdup(argv[i]);
user->next = (void *) 1;
} else if (os_strcmp(col[i], "methods") == 0 && argv[i]) {
set_user_methods(user, argv[i]);
} else if (os_strcmp(col[i], "remediation") == 0 && argv[i]) {
user->remediation = strlen(argv[i]) > 0;
}
}
return 0;
}
static int get_wildcard_cb(void *ctx, int argc, char *argv[], char *col[])
{
struct hostapd_eap_user *user = ctx;
int i, id = -1, methods = -1;
size_t len;
for (i = 0; i < argc; i++) {
if (os_strcmp(col[i], "identity") == 0 && argv[i])
id = i;
else if (os_strcmp(col[i], "methods") == 0 && argv[i])
methods = i;
}
if (id < 0 || methods < 0)
return 0;
len = os_strlen(argv[id]);
if (len <= user->identity_len &&
os_memcmp(argv[id], user->identity, len) == 0 &&
(user->password == NULL || len > user->password_len)) {
bin_clear_free(user->password, user->password_len);
user->password_len = os_strlen(argv[id]);
user->password = (u8 *) os_strdup(argv[id]);
user->next = (void *) 1;
set_user_methods(user, argv[methods]);
}
return 0;
}
static const struct hostapd_eap_user *
eap_user_sqlite_get(struct hostapd_data *hapd, const u8 *identity,
size_t identity_len, int phase2)
{
sqlite3 *db;
struct hostapd_eap_user *user = NULL;
char id_str[256], cmd[300];
size_t i;
if (identity_len >= sizeof(id_str))
return NULL;
os_memcpy(id_str, identity, identity_len);
id_str[identity_len] = '\0';
for (i = 0; i < identity_len; i++) {
if (id_str[i] >= 'a' && id_str[i] <= 'z')
continue;
if (id_str[i] >= 'A' && id_str[i] <= 'Z')
continue;
if (id_str[i] >= '0' && id_str[i] <= '9')
continue;
if (id_str[i] == '-' || id_str[i] == '_' || id_str[i] == '.' ||
id_str[i] == ',' || id_str[i] == '@' || id_str[i] == '\\' ||
id_str[i] == '!' || id_str[i] == '#' || id_str[i] == '%' ||
id_str[i] == '=' || id_str[i] == ' ')
continue;
wpa_printf(MSG_INFO, "DB: Unsupported character in identity");
return NULL;
}
bin_clear_free(hapd->tmp_eap_user.identity,
hapd->tmp_eap_user.identity_len);
bin_clear_free(hapd->tmp_eap_user.password,
hapd->tmp_eap_user.password_len);
os_memset(&hapd->tmp_eap_user, 0, sizeof(hapd->tmp_eap_user));
hapd->tmp_eap_user.phase2 = phase2;
hapd->tmp_eap_user.identity = os_zalloc(identity_len + 1);
if (hapd->tmp_eap_user.identity == NULL)
return NULL;
os_memcpy(hapd->tmp_eap_user.identity, identity, identity_len);
if (sqlite3_open(hapd->conf->eap_user_sqlite, &db)) {
wpa_printf(MSG_INFO, "DB: Failed to open database %s: %s",
hapd->conf->eap_user_sqlite, sqlite3_errmsg(db));
sqlite3_close(db);
return NULL;
}
os_snprintf(cmd, sizeof(cmd),
"SELECT * FROM users WHERE identity='%s' AND phase2=%d;",
id_str, phase2);
wpa_printf(MSG_DEBUG, "DB: %s", cmd);
if (sqlite3_exec(db, cmd, get_user_cb, &hapd->tmp_eap_user, NULL) !=
SQLITE_OK) {
wpa_printf(MSG_DEBUG, "DB: Failed to complete SQL operation");
} else if (hapd->tmp_eap_user.next)
user = &hapd->tmp_eap_user;
if (user == NULL && !phase2) {
os_snprintf(cmd, sizeof(cmd),
"SELECT identity,methods FROM wildcards;");
wpa_printf(MSG_DEBUG, "DB: %s", cmd);
if (sqlite3_exec(db, cmd, get_wildcard_cb, &hapd->tmp_eap_user,
NULL) != SQLITE_OK) {
wpa_printf(MSG_DEBUG, "DB: Failed to complete SQL "
"operation");
} else if (hapd->tmp_eap_user.next) {
user = &hapd->tmp_eap_user;
os_free(user->identity);
user->identity = user->password;
user->identity_len = user->password_len;
user->password = NULL;
user->password_len = 0;
}
}
sqlite3_close(db);
return user;
}
#endif /* CONFIG_SQLITE */
const struct hostapd_eap_user *
hostapd_get_eap_user(struct hostapd_data *hapd, const u8 *identity,
size_t identity_len, int phase2)
{
const struct hostapd_bss_config *conf = hapd->conf;
struct hostapd_eap_user *user = conf->eap_user;
#ifdef CONFIG_WPS
if (conf->wps_state && identity_len == WSC_ID_ENROLLEE_LEN &&
os_memcmp(identity, WSC_ID_ENROLLEE, WSC_ID_ENROLLEE_LEN) == 0) {
static struct hostapd_eap_user wsc_enrollee;
os_memset(&wsc_enrollee, 0, sizeof(wsc_enrollee));
wsc_enrollee.methods[0].method = eap_server_get_type(
"WSC", &wsc_enrollee.methods[0].vendor);
return &wsc_enrollee;
}
if (conf->wps_state && identity_len == WSC_ID_REGISTRAR_LEN &&
os_memcmp(identity, WSC_ID_REGISTRAR, WSC_ID_REGISTRAR_LEN) == 0) {
static struct hostapd_eap_user wsc_registrar;
os_memset(&wsc_registrar, 0, sizeof(wsc_registrar));
wsc_registrar.methods[0].method = eap_server_get_type(
"WSC", &wsc_registrar.methods[0].vendor);
wsc_registrar.password = (u8 *) conf->ap_pin;
wsc_registrar.password_len = conf->ap_pin ?
os_strlen(conf->ap_pin) : 0;
return &wsc_registrar;
}
#endif /* CONFIG_WPS */
while (user) {
if (!phase2 && user->identity == NULL) {
/* Wildcard match */
break;
}
if (user->phase2 == !!phase2 && user->wildcard_prefix &&
identity_len >= user->identity_len &&
os_memcmp(user->identity, identity, user->identity_len) ==
0) {
/* Wildcard prefix match */
break;
}
if (user->phase2 == !!phase2 &&
user->identity_len == identity_len &&
os_memcmp(user->identity, identity, identity_len) == 0)
break;
user = user->next;
}
#ifdef CONFIG_SQLITE
if (user == NULL && conf->eap_user_sqlite) {
return eap_user_sqlite_get(hapd, identity, identity_len,
phase2);
}
#endif /* CONFIG_SQLITE */
return user;
}