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<?php
/**
* @package admintools
* @copyright Copyright (c)2010-2020 Nicholas K. Dionysopoulos / Akeeba Ltd
* @license GNU General Public License version 3, or later
*/
namespace Akeeba\AdminTools\Admin\Model;
// Protect from unauthorized access
defined('_JEXEC') or die();
use AtsystemFeatureNonewadmins;
use DateInterval;
use DateTimeZone;
use Exception;
use FOF30\Container\Container;
use FOF30\Date\Date;
use FOF30\Encrypt\Randval;
use FOF30\Model\DataModel;
use JDatabaseQuery;
use Joomla\CMS\Access\Access;
use Joomla\CMS\Language\Text;
use Joomla\CMS\User\UserHelper;
use RuntimeException;
/**
* A model for temporary super user management
*
* @property int $user_id
* @property string $expiration
*
* @method $this user_id() user_id(int $user_id)
* @method $this expiration() expiration(string $user_id)
*
* @property-read JoomlaUsers $user
*
* @package Akeeba\AdminTools\Admin\Model
*
* @since 5.3.0
*/
class TempSuperUsers extends DataModel
{
/**
* Cache of user group IDs with Super User privileges
*
* @var array
* @since 5.3.0
*/
protected $superUserGroups = [];
public function __construct(Container $container, array $config = [])
{
$config['tableName'] = '#__admintools_tempsupers';
$config['idFieldName'] = 'user_id';
parent::__construct($container, $config);
$this->addBehaviour('Filters');
$this->addBehaviour('RelationFilters');
$this->hasOne('user', 'JoomlaUsers', 'user_id', 'id');
$this->with(['user']);
}
/**
* Build the SELECT query for returning records. Overridden to apply custom filters.
*
* @param JDatabaseQuery $query The query being built
* @param bool $overrideLimits Should I be overriding the limit state (limitstart & limit)?
*
* @return void
*/
public function onAfterBuildQuery(JDatabaseQuery $query, $overrideLimits = false)
{
$db = $this->getDbo();
$username = $this->getState('username', null, 'string');
if ($username)
{
$this->whereHas('user', function (JDatabaseQuery $subQuery) use ($username, $db) {
$subQuery->where($db->qn('username') . ' LIKE ' . $db->q('%' . $username . '%'));
});
}
}
public function onBeforeCheck()
{
// Make sure I am not editing myself
if ($this->user_id == $this->container->platform->getUser()->id)
{
throw new RuntimeException(Text::_('COM_ADMINTOOLS_ERR_TEMPSUPERUSERS_CANTEDITSELF'), 403);
}
// Make sure I am not setting an expiration time in the past
$timezone = $this->container->platform->getUser()->getParam('timezone', $this->container->platform->getConfig()->get('offset', 'GMT'));
try
{
$tz = new DateTimeZone($timezone);
}
catch (Exception $e)
{
$tz = new DateTimeZone('GMT');
}
$jNow = new Date();
$jThen = new Date($this->expiration, $tz);
if ($jThen->toUnix() < $jNow->toUnix())
{
throw new RuntimeException(Text::_('COM_ADMINTOOLS_ERR_TEMPSUPERUSERS_EXPIRATIONINPAST'), 500);
}
$this->expiration = $jThen->toSql();
}
public function onAfterDelete()
{
$userId = $this->user_id;
if (empty($userId))
{
return;
}
/** @var JoomlaUsers $user */
$user = $this->container->factory->model('JoomlaUsers');
try
{
$user->findOrFail($userId);
}
catch (Exception $e)
{
return;
}
$this->setNoCheckFlags(true);
$user->delete();
$this->setNoCheckFlags(false);
}
/**
* Returns the new Super User data, either what was saved in the session or random values if the information was not
* present in the session
*
* @since 5.3.0
*/
public function getNewUserData()
{
$ret = [
'expiration' => null,
'username' => null,
'password' => null,
'password2' => null,
'email' => null,
'name' => null,
'groups' => [],
];
$session = $this->container->session;
$rand = new Randval();
foreach ($ret as $field => $v)
{
$ret[$field] = $session->get($field, null, 'admintools_tempsuper_wizard');
}
if (empty($ret['expiration']) || ($ret['expiration'] == $this->getDbo()->getNullDate()))
{
$jDate = new Date();
$interval = new DateInterval('P15D');
$ret['expiration'] = $jDate->add($interval)->toRFC822();
}
if (empty($ret['username']))
{
$ret['username'] = 'temp' . $rand->getRandomPassword(12);
}
if (empty($ret['password']) && empty($ret['password2']))
{
$ret['password'] = $rand->getRandomPassword(32);
$ret['password2'] = $ret['password'];
}
if (empty($ret['email']))
{
$ret['email'] = $rand->getRandomPassword(12) . '@example.com';
}
if (empty($ret['name']))
{
$ret['name'] = Text::_('COM_ADMINTOOLS_TEMPSUPERUSERS_LBL_DEFAULTNAME');
}
if (empty($ret['groups']))
{
$superUserGroups = $this->getSuperUserGroups();
$ret['groups'] = [
array_shift($superUserGroups),
];
}
return $ret;
}
/**
* Find an eligible super user or create a new one, then return the user ID. This is used by the Controller to
* create a new record.
*
* @return int
*
* @since 5.3.0
*/
public function getUserIdFromInfo()
{
$this->setNoCheckFlags(true);
$info = $this->getNewUserData();
$info['block'] = 0;
$info['sendEmail'] = 0;
$info['lastvisitDate'] = (new Date())->toSql();
$info['activation'] = '';
$info['otpKey'] = '';
$info['otep'] = '';
$info['requireReset'] = 0;
// Do I have an eligible existing user?
$userId = $this->findExistingUser($info['username']);
if (empty($userId))
{
// Make sure $info['groups'] is defined and defines at least one Super User group
$superUserGroups = $this->getSuperUserGroups();
$usedSUGroups = array_intersect($info['groups'], $superUserGroups);
if (empty($usedSUGroups))
{
$this->setNoCheckFlags(false);
throw new RuntimeException(Text::_('COM_ADMINTOOLS_ERR_TEMPSUPERUSERS_NOTASUPERUSER'), 500);
}
// Create a new user
$user = $this->container->platform->getUser(0);
// Set the user's default language to whatever the site's current language is
$info['params'] = [
'language' => self::getContainer()->platform->getConfig()->get('language'),
];
$user->bind($info);
$saved = $user->save();
if (!$saved)
{
$this->setNoCheckFlags(false);
throw new RuntimeException($user->getError());
}
return $user->id;
}
// Make sure I am not trying to edit myself
if ($userId == $this->container->platform->getUser()->id)
{
$this->setNoCheckFlags(false);
throw new RuntimeException(Text::_('COM_ADMINTOOLS_ERR_TEMPSUPERUSERS_CANTEDITSELF'), 403);
}
// Apply changes to the existing user
$user = $this->container->platform->getUser($userId);
unset($info['username']);
$user->bind($info);
$saved = $user->save();
$this->setNoCheckFlags(false);
if (!$saved)
{
throw new RuntimeException($user->getError());
}
return $userId;
}
/**
* Temporarily disable Admin Tools security checks for creating / editing Super Users.
*
* * The "Backend Edit Admin User" feature will prevent creating / editing temporary Super Users. Before doing
* anything with the temporary user records we set a special flag to disable it for the next request.
* * The "Monitor Super User accounts" will automatically disable our newly created temporary Super User. We work
* around it by setting the special session flag which tells this feature to replace the Super Users list.
*
* @param bool $noChecks
*/
public function setNoCheckFlags($noChecks = true)
{
// Workaround for "Backend Edit Admin User"
if (class_exists('AtsystemFeatureNonewadmins') && method_exists('AtsystemFeatureNonewadmins', 'setTempDisableFlag'))
{
AtsystemFeatureNonewadmins::setTempDisableFlag($noChecks);
}
// Workaround for "Monitor Super User accounts"
$this->container->platform->unsetSessionVar('superuserslist.createnew', 'com_admintools');
if ($noChecks)
{
$this->container->platform->setSessionVar('superuserslist.createnew', true, 'com_admintools');
}
}
/**
* Returns all Joomla! user groups
*
* @return array
*
* @since 5.3.0
*/
protected function getSuperUserGroups()
{
if (empty($this->superUserGroups))
{
// Get all groups
$db = $this->getDbo();
$query = $db->getQuery(true)
->select([$db->qn('id')])
->from($db->qn('#__usergroups'));
$this->superUserGroups = $db->setQuery($query)->loadColumn(0);
// This should never happen (unless your site is very dead, in which case I feel terribly sorry for you...)
if (empty($this->superUserGroups))
{
$this->superUserGroups = [];
}
$this->superUserGroups = array_filter($this->superUserGroups, function ($group) {
return Access::checkGroup($group, 'core.admin');
});
}
return $this->superUserGroups;
}
protected function findExistingUser($username)
{
/** @var JoomlaUsers $model */
$model = $this->container->factory->model('JoomlaUsers')->tmpInstance();
// Make sure the user exists. Return 0 otherwise.
$id = UserHelper::getUserId($username);
if (empty($id))
{
return 0;
}
$user = $this->container->platform->getUser($id);
// Make sure the user is a Super User
if (!$user->authorise('core.admin'))
{
throw new RuntimeException(Text::_('COM_ADMINTOOLS_ERR_TEMPSUPERUSERS_NOTSUPER'), 500);
}
// Make sure the user was already blocked
if (!$user->block)
{
throw new RuntimeException(Text::_('COM_ADMINTOOLS_ERR_TEMPSUPERUSERS_NOTBLOCKED'), 500);
}
return $id;
}
}