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<?php
/*
** Zabbix
** Copyright (C) 2001-2022 Zabbix SIA
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation; either version 2 of the License, or
** (at your option) any later version.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
**/
class CWebUser {
public static $data = null;
/**
* Flag used to not to extend session lifetime in checkAuthentication.
*/
static $extend_session = true;
/**
* Disable automatic session extension.
*/
public static function disableSessionExtension() {
self::$extend_session = false;
}
/**
* Tries to login a user and populates self::$data on success.
*
* @param string $login user login
* @param string $password user password
*
* @throws Exception if user cannot be logged in
*
* @return bool
*/
public static function login(string $login, string $password): bool {
try {
self::$data = API::User()->login([
'username' => $login,
'password' => $password,
'userData' => true
]);
if (!self::$data) {
throw new Exception();
}
API::getWrapper()->auth = self::$data['sessionid'];
if (self::$data['gui_access'] == GROUP_GUI_ACCESS_DISABLED) {
error(_('GUI access disabled.'));
throw new Exception();
}
if (isset(self::$data['attempt_failed']) && self::$data['attempt_failed']) {
CProfile::init();
CProfile::update('web.login.attempt.failed', self::$data['attempt_failed'], PROFILE_TYPE_INT);
CProfile::update('web.login.attempt.ip', self::$data['attempt_ip'], PROFILE_TYPE_STR);
CProfile::update('web.login.attempt.clock', self::$data['attempt_clock'], PROFILE_TYPE_INT);
if (!CProfile::flush()) {
return false;
}
}
return true;
}
catch (Exception $e) {
self::setDefault();
return false;
}
}
/**
* Log-out the current user.
*/
public static function logout(): void {
if (API::User()->logout([])) {
self::$data = null;
session_destroy();
}
}
public static function checkAuthentication(string $sessionid): bool {
try {
self::$data = API::User()->checkAuthentication([
'sessionid' => $sessionid,
'extend' => self::$extend_session
]);
if (empty(self::$data)) {
CMessageHelper::clear();
self::$data = API::User()->login([
'username' => ZBX_GUEST_USER,
'password' => '',
'userData' => true
]);
if (empty(self::$data)) {
throw new Exception();
}
}
if (self::$data['gui_access'] == GROUP_GUI_ACCESS_DISABLED) {
throw new Exception();
}
return true;
}
catch (Exception $e) {
return false;
}
}
/**
* Checks access of authenticated user to specific access rule.
*
* @static
*
* @param string $rule_name Rule name.
*
* @return bool Returns true if user has access to specified rule, false - otherwise.
*
* @throws Exception
*/
public static function checkAccess(string $rule_name): bool {
if (empty(self::$data) || self::$data['roleid'] == 0) {
return false;
}
return CRoleHelper::checkAccess($rule_name, self::$data['roleid']);
}
/**
* Sets user data defaults.
*
* @static
*/
public static function setDefault(): void {
self::$data = [
'sessionid' => CEncryptHelper::generateKey(),
'username' => ZBX_GUEST_USER,
'userid' => 0,
'lang' => CSettingsHelper::getGlobal(CSettingsHelper::DEFAULT_LANG),
'theme' => CSettingsHelper::getGlobal(CSettingsHelper::DEFAULT_THEME),
'type' => 0,
'gui_access' => GROUP_GUI_ACCESS_SYSTEM,
'debug_mode' => false,
'roleid' => 0,
'autologin' => 0
];
}
/**
* Returns the type of the current user.
*
* @static
*
* @return int
*/
public static function getType() {
return self::$data ? self::$data['type'] : 0;
}
/**
* Returns true if debug mode is enabled.
*
* @return bool
*/
public static function getDebugMode() {
return (self::$data && self::$data['debug_mode']);
}
/**
* Returns true if the current user is logged in.
*
* @return bool
*/
public static function isLoggedIn() {
return (self::$data && self::$data['userid']);
}
/**
* Returns true if the user is not logged in or logged in as Guest.
*
* @return bool
*/
public static function isGuest() {
return (self::$data && self::$data['username'] == ZBX_GUEST_USER);
}
/**
* Return true if guest user has access to frontend.
*
* @return bool
*/
public static function isGuestAllowed() {
$guest = DB::select('users', [
'output' => ['userid'],
'filter' => ['username' => ZBX_GUEST_USER]
]);
return check_perm2system($guest[0]['userid'])
&& getUserGuiAccess($guest[0]['userid']) != GROUP_GUI_ACCESS_DISABLED;
}
/**
* Returns refresh rate in seconds.
*
* @return int
*/
public static function getRefresh() {
return timeUnitToSeconds(self::$data['refresh']);
}
/**
* Returns interface language attribute value for HTML lang tag.
*
* @return string
*/
public static function getLang() {
return (self::$data) ? substr(self::$data['lang'], 0, strpos(self::$data['lang'], '_')) : 'en';
}
/**
* Get user IP address.
*
* @return string
*/
public static function getIp(): string {
return $_SERVER['REMOTE_ADDR'];
}
}
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