isInsecurePath() public static method

Insecure path potentially containing directory traversal
public static isInsecurePath ( string $strPath ) : boolean
$strPath string The file path
return boolean True if the file path is insecure
示例#1
0
 /**
  * Find a particular template file and return its path
  *
  * @param string $strTemplate The name of the template
  * @param string $strFormat   The file extension
  *
  * @return string The path to the template file
  *
  * @throws \InvalidArgumentException If $strFormat is unknown
  * @throws \RuntimeException         If the template group folder is insecure
  */
 public static function getTemplate($strTemplate, $strFormat = 'html5')
 {
     $arrAllowed = trimsplit(',', \Config::get('templateFiles'));
     array_push($arrAllowed, 'html5');
     // see #3398
     if (!in_array($strFormat, $arrAllowed)) {
         throw new \InvalidArgumentException('Invalid output format ' . $strFormat);
     }
     $strTemplate = basename($strTemplate);
     // Check for a theme folder
     if (TL_MODE == 'FE') {
         /** @var \PageModel $objPage */
         global $objPage;
         if ($objPage->templateGroup != '') {
             if (\Validator::isInsecurePath($objPage->templateGroup)) {
                 throw new \RuntimeException('Invalid path ' . $objPage->templateGroup);
             }
             return \TemplateLoader::getPath($strTemplate, $strFormat, $objPage->templateGroup);
         }
     }
     return \TemplateLoader::getPath($strTemplate, $strFormat);
 }
示例#2
0
    /**
     * Add a breadcrumb menu to the file tree
     *
     * @param string $strKey
     *
     * @throws AccessDeniedException
     * @throws \RuntimeException
     */
    public static function addFilesBreadcrumb($strKey = 'tl_files_node')
    {
        /** @var AttributeBagInterface $objSession */
        $objSession = \System::getContainer()->get('session')->getBag('contao_backend');
        // Set a new node
        if (isset($_GET['fn'])) {
            // Check the path (thanks to Arnaud Buchoux)
            if (\Validator::isInsecurePath(\Input::get('fn', true))) {
                throw new \RuntimeException('Insecure path ' . \Input::get('fn', true));
            }
            $objSession->set($strKey, \Input::get('fn', true));
            \Controller::redirect(preg_replace('/(&|\\?)fn=[^&]*/', '', \Environment::get('request')));
        }
        $strNode = $objSession->get($strKey);
        if ($strNode == '') {
            return;
        }
        // Check the path (thanks to Arnaud Buchoux)
        if (\Validator::isInsecurePath($strNode)) {
            throw new \RuntimeException('Insecure path ' . $strNode);
        }
        // Currently selected folder does not exist
        if (!is_dir(TL_ROOT . '/' . $strNode)) {
            $objSession->set($strKey, '');
            return;
        }
        $objUser = \BackendUser::getInstance();
        $strPath = \Config::get('uploadPath');
        $arrNodes = explode('/', preg_replace('/^' . preg_quote(\Config::get('uploadPath'), '/') . '\\//', '', $strNode));
        $arrLinks = array();
        // Add root link
        $arrLinks[] = \Image::getHtml('filemounts.svg') . ' <a href="' . \Backend::addToUrl('fn=') . '" title="' . \StringUtil::specialchars($GLOBALS['TL_LANG']['MSC']['selectAllNodes']) . '">' . $GLOBALS['TL_LANG']['MSC']['filterAll'] . '</a>';
        // Generate breadcrumb trail
        foreach ($arrNodes as $strFolder) {
            $strPath .= '/' . $strFolder;
            // Do not show pages which are not mounted
            if (!$objUser->hasAccess($strPath, 'filemounts')) {
                continue;
            }
            // No link for the active folder
            if ($strPath == $strNode) {
                $arrLinks[] = \Image::getHtml('folderC.svg') . ' ' . $strFolder;
            } else {
                $arrLinks[] = \Image::getHtml('folderC.svg') . ' <a href="' . \Backend::addToUrl('fn=' . $strPath) . '" title="' . \StringUtil::specialchars($GLOBALS['TL_LANG']['MSC']['selectNode']) . '">' . $strFolder . '</a>';
            }
        }
        // Check whether the node is mounted
        if (!$objUser->hasAccess($strNode, 'filemounts')) {
            $objSession->set($strKey, '');
            throw new AccessDeniedException('Folder ID "' . $strNode . '" is not mounted');
        }
        // Limit tree
        $GLOBALS['TL_DCA']['tl_files']['list']['sorting']['root'] = array($strNode);
        // Insert breadcrumb menu
        $GLOBALS['TL_DCA']['tl_files']['list']['sorting']['breadcrumb'] .= '

<ul id="tl_breadcrumb">
  <li>' . implode(' &gt; </li><li>', $arrLinks) . '</li>
</ul>';
    }
示例#3
0
 /**
  * Check a file operation
  *
  * @param string $strFile
  *
  * @return boolean
  *
  * @throws AccessDeniedException
  */
 protected function isValid($strFile)
 {
     $strFolder = \Input::get('pid', true);
     // Check the path
     if (\Validator::isInsecurePath($strFile)) {
         throw new AccessDeniedException('Invalid file name "' . $strFile . '" (hacking attempt).');
     } elseif (\Validator::isInsecurePath($strFolder)) {
         throw new AccessDeniedException('Invalid folder name "' . $strFolder . '" (hacking attempt).');
     }
     // Check for valid file types
     if (!empty($this->arrValidFileTypes) && is_file(TL_ROOT . '/' . $strFile)) {
         $fileinfo = preg_replace('/.*\\.(.*)$/ui', '$1', $strFile);
         if (!in_array(strtolower($fileinfo), $this->arrValidFileTypes)) {
             throw new AccessDeniedException('File "' . $strFile . '" is not an allowed file type.');
         }
     }
     // Check whether the file is within the files directory
     if (!preg_match('/^' . preg_quote(\Config::get('uploadPath'), '/') . '/i', $strFile)) {
         throw new AccessDeniedException('File or folder "' . $strFile . '" is not within the files directory.');
     }
     // Check whether the parent folder is within the files directory
     if ($strFolder && !preg_match('/^' . preg_quote(\Config::get('uploadPath'), '/') . '/i', $strFolder)) {
         throw new AccessDeniedException('Parent folder "' . $strFolder . '" is not within the files directory.');
     }
     // Do not allow file operations on root folders
     if (\Input::get('act') == 'edit' || \Input::get('act') == 'paste' || \Input::get('act') == 'delete') {
         $this->import('BackendUser', 'User');
         if (!$this->User->isAdmin && in_array($strFile, $this->User->filemounts)) {
             throw new AccessDeniedException('Attempt to edit, copy, move or delete the root folder "' . $strFile . '".');
         }
     }
     return true;
 }
示例#4
0
 /**
  * Add templates to the archive
  *
  * @param ZipWriter $objArchive
  * @param string    $strFolder
  */
 protected function addTemplatesToArchive(ZipWriter $objArchive, $strFolder)
 {
     // Strip the templates folder name
     $strFolder = preg_replace('@^templates/@', '', $strFolder);
     // Re-add the templates folder name
     if ($strFolder == '') {
         $strFolder = 'templates';
     } else {
         $strFolder = 'templates/' . $strFolder;
     }
     if (\Validator::isInsecurePath($strFolder)) {
         throw new \RuntimeException('Insecure path ' . $strFolder);
     }
     // Return if the folder does not exist
     if (!is_dir(TL_ROOT . '/' . $strFolder)) {
         return;
     }
     $arrAllowed = \StringUtil::trimsplit(',', strtolower(\Config::get('templateFiles')));
     array_push($arrAllowed, 'sql');
     // see #7048
     // Add all template files to the archive
     foreach (scan(TL_ROOT . '/' . $strFolder) as $strFile) {
         if (preg_match('/\\.(' . implode('|', $arrAllowed) . ')$/', $strFile) && strncmp($strFile, 'be_', 3) !== 0 && strncmp($strFile, 'nl_', 3) !== 0) {
             $objArchive->addFile($strFolder . '/' . $strFile);
         }
     }
 }
示例#5
0
 /**
  * Replace insert tags with their values
  *
  * @param string  $strBuffer The text with the tags to be replaced
  * @param boolean $blnCache  If false, non-cacheable tags will be replaced
  *
  * @return string The text with the replaced tags
  */
 protected function doReplace($strBuffer, $blnCache)
 {
     /** @var PageModel $objPage */
     global $objPage;
     // Preserve insert tags
     if (\Config::get('disableInsertTags')) {
         return \StringUtil::restoreBasicEntities($strBuffer);
     }
     $tags = preg_split('/{{([^{}]+)}}/', $strBuffer, -1, PREG_SPLIT_DELIM_CAPTURE);
     if (count($tags) < 2) {
         return \StringUtil::restoreBasicEntities($strBuffer);
     }
     $strBuffer = '';
     // Create one cache per cache setting (see #7700)
     static $arrItCache;
     $arrCache =& $arrItCache[$blnCache];
     for ($_rit = 0, $_cnt = count($tags); $_rit < $_cnt; $_rit += 2) {
         $strBuffer .= $tags[$_rit];
         $strTag = $tags[$_rit + 1];
         // Skip empty tags
         if ($strTag == '') {
             continue;
         }
         $flags = explode('|', $strTag);
         $tag = array_shift($flags);
         $elements = explode('::', $tag);
         // Load the value from cache
         if (isset($arrCache[$strTag]) && !in_array('refresh', $flags)) {
             $strBuffer .= $arrCache[$strTag];
             continue;
         }
         // Skip certain elements if the output will be cached
         if ($blnCache) {
             if ($elements[0] == 'date' || $elements[0] == 'ua' || $elements[0] == 'post' || $elements[0] == 'file' && !\Validator::isStringUuid($elements[1]) || $elements[1] == 'back' || $elements[1] == 'referer' || $elements[0] == 'request_token' || $elements[0] == 'toggle_view' || strncmp($elements[0], 'cache_', 6) === 0 || in_array('uncached', $flags)) {
                 /** @var FragmentHandler $fragmentHandler */
                 $fragmentHandler = \System::getContainer()->get('fragment.handler');
                 $strBuffer .= $fragmentHandler->render(new ControllerReference('contao.controller.insert_tags:renderAction', ['insertTag' => '{{' . $strTag . '}}']), 'esi');
                 continue;
             }
         }
         $arrCache[$strTag] = '';
         // Replace the tag
         switch (strtolower($elements[0])) {
             // Date
             case 'date':
                 $arrCache[$strTag] = \Date::parse($elements[1] ?: \Config::get('dateFormat'));
                 break;
                 // Accessibility tags
             // Accessibility tags
             case 'lang':
                 if ($elements[1] == '') {
                     $arrCache[$strTag] = '</span>';
                 } else {
                     $arrCache[$strTag] = $arrCache[$strTag] = '<span lang="' . \StringUtil::specialchars($elements[1]) . '">';
                 }
                 break;
                 // Line break
             // Line break
             case 'br':
                 $arrCache[$strTag] = '<br>';
                 break;
                 // E-mail addresses
             // E-mail addresses
             case 'email':
             case 'email_open':
             case 'email_url':
                 if ($elements[1] == '') {
                     $arrCache[$strTag] = '';
                     break;
                 }
                 $strEmail = \StringUtil::encodeEmail($elements[1]);
                 // Replace the tag
                 switch (strtolower($elements[0])) {
                     case 'email':
                         $arrCache[$strTag] = '<a href="&#109;&#97;&#105;&#108;&#116;&#111;&#58;' . $strEmail . '" class="email">' . preg_replace('/\\?.*$/', '', $strEmail) . '</a>';
                         break;
                     case 'email_open':
                         $arrCache[$strTag] = '<a href="&#109;&#97;&#105;&#108;&#116;&#111;&#58;' . $strEmail . '" title="' . $strEmail . '" class="email">';
                         break;
                     case 'email_url':
                         $arrCache[$strTag] = $strEmail;
                         break;
                 }
                 break;
                 // Label tags
             // Label tags
             case 'label':
                 $keys = explode(':', $elements[1]);
                 if (count($keys) < 2) {
                     $arrCache[$strTag] = '';
                     break;
                 }
                 $file = $keys[0];
                 // Map the key (see #7217)
                 switch ($file) {
                     case 'CNT':
                         $file = 'countries';
                         break;
                     case 'LNG':
                         $file = 'languages';
                         break;
                     case 'MOD':
                     case 'FMD':
                         $file = 'modules';
                         break;
                     case 'FFL':
                         $file = 'tl_form_field';
                         break;
                     case 'CACHE':
                         $file = 'tl_page';
                         break;
                     case 'XPL':
                         $file = 'explain';
                         break;
                     case 'XPT':
                         $file = 'exception';
                         break;
                     case 'MSC':
                     case 'ERR':
                     case 'CTE':
                     case 'PTY':
                     case 'FOP':
                     case 'CHMOD':
                     case 'DAYS':
                     case 'MONTHS':
                     case 'UNITS':
                     case 'CONFIRM':
                     case 'DP':
                     case 'COLS':
                         $file = 'default';
                         break;
                 }
                 \System::loadLanguageFile($file);
                 if (count($keys) == 2) {
                     $arrCache[$strTag] = $GLOBALS['TL_LANG'][$keys[0]][$keys[1]];
                 } else {
                     $arrCache[$strTag] = $GLOBALS['TL_LANG'][$keys[0]][$keys[1]][$keys[2]];
                 }
                 break;
                 // Front end user
             // Front end user
             case 'user':
                 if (FE_USER_LOGGED_IN) {
                     $this->import('FrontendUser', 'User');
                     $value = $this->User->{$elements[1]};
                     if ($value == '') {
                         $arrCache[$strTag] = $value;
                         break;
                     }
                     $this->loadDataContainer('tl_member');
                     if ($GLOBALS['TL_DCA']['tl_member']['fields'][$elements[1]]['inputType'] == 'password') {
                         $arrCache[$strTag] = '';
                         break;
                     }
                     $value = \StringUtil::deserialize($value);
                     // Decrypt the value
                     if ($GLOBALS['TL_DCA']['tl_member']['fields'][$elements[1]]['eval']['encrypt']) {
                         $value = \Encryption::decrypt($value);
                     }
                     $rgxp = $GLOBALS['TL_DCA']['tl_member']['fields'][$elements[1]]['eval']['rgxp'];
                     $opts = $GLOBALS['TL_DCA']['tl_member']['fields'][$elements[1]]['options'];
                     $rfrc = $GLOBALS['TL_DCA']['tl_member']['fields'][$elements[1]]['reference'];
                     if ($rgxp == 'date') {
                         $arrCache[$strTag] = \Date::parse(\Config::get('dateFormat'), $value);
                     } elseif ($rgxp == 'time') {
                         $arrCache[$strTag] = \Date::parse(\Config::get('timeFormat'), $value);
                     } elseif ($rgxp == 'datim') {
                         $arrCache[$strTag] = \Date::parse(\Config::get('datimFormat'), $value);
                     } elseif (is_array($value)) {
                         $arrCache[$strTag] = implode(', ', $value);
                     } elseif (is_array($opts) && array_is_assoc($opts)) {
                         $arrCache[$strTag] = isset($opts[$value]) ? $opts[$value] : $value;
                     } elseif (is_array($rfrc)) {
                         $arrCache[$strTag] = isset($rfrc[$value]) ? is_array($rfrc[$value]) ? $rfrc[$value][0] : $rfrc[$value] : $value;
                     } else {
                         $arrCache[$strTag] = $value;
                     }
                     // Convert special characters (see #1890)
                     $arrCache[$strTag] = \StringUtil::specialchars($arrCache[$strTag]);
                 }
                 break;
                 // Link
             // Link
             case 'link':
             case 'link_open':
             case 'link_url':
             case 'link_title':
             case 'link_target':
             case 'link_name':
                 $strTarget = null;
                 // Back link
                 if ($elements[1] == 'back') {
                     $strUrl = 'javascript:history.go(-1)';
                     $strTitle = $GLOBALS['TL_LANG']['MSC']['goBack'];
                     // No language files if the page is cached
                     if (!strlen($strTitle)) {
                         $strTitle = 'Go back';
                     }
                     $strName = $strTitle;
                 } elseif (strncmp($elements[1], 'http://', 7) === 0 || strncmp($elements[1], 'https://', 8) === 0) {
                     $strUrl = $elements[1];
                     $strTitle = $elements[1];
                     $strName = str_replace(array('http://', 'https://'), '', $elements[1]);
                 } else {
                     // User login page
                     if ($elements[1] == 'login') {
                         if (!FE_USER_LOGGED_IN) {
                             break;
                         }
                         $this->import('FrontendUser', 'User');
                         $elements[1] = $this->User->loginPage;
                     }
                     $objNextPage = \PageModel::findByIdOrAlias($elements[1]);
                     if ($objNextPage === null) {
                         break;
                     }
                     // Page type specific settings (thanks to Andreas Schempp)
                     switch ($objNextPage->type) {
                         case 'redirect':
                             $strUrl = $objNextPage->url;
                             if (strncasecmp($strUrl, 'mailto:', 7) === 0) {
                                 $strUrl = \StringUtil::encodeEmail($strUrl);
                             }
                             break;
                         case 'forward':
                             if ($objNextPage->jumpTo) {
                                 /** @var PageModel $objNext */
                                 $objNext = $objNextPage->getRelated('jumpTo');
                             } else {
                                 $objNext = \PageModel::findFirstPublishedRegularByPid($objNextPage->id);
                             }
                             if ($objNext instanceof PageModel) {
                                 $strUrl = $objNext->getFrontendUrl();
                                 break;
                             }
                             // DO NOT ADD A break; STATEMENT
                         // DO NOT ADD A break; STATEMENT
                         default:
                             $strUrl = $objNextPage->getFrontendUrl();
                             break;
                     }
                     $strName = $objNextPage->title;
                     $strTarget = $objNextPage->target ? ' target="_blank"' : '';
                     $strTitle = $objNextPage->pageTitle ?: $objNextPage->title;
                 }
                 // Replace the tag
                 switch (strtolower($elements[0])) {
                     case 'link':
                         $arrCache[$strTag] = sprintf('<a href="%s" title="%s"%s>%s</a>', $strUrl, \StringUtil::specialchars($strTitle), $strTarget, $strName);
                         break;
                     case 'link_open':
                         $arrCache[$strTag] = sprintf('<a href="%s" title="%s"%s>', $strUrl, \StringUtil::specialchars($strTitle), $strTarget);
                         break;
                     case 'link_url':
                         $arrCache[$strTag] = $strUrl;
                         break;
                     case 'link_title':
                         $arrCache[$strTag] = \StringUtil::specialchars($strTitle);
                         break;
                     case 'link_target':
                         $arrCache[$strTag] = $strTarget;
                         break;
                     case 'link_name':
                         $arrCache[$strTag] = $strName;
                         break;
                 }
                 break;
                 // Closing link tag
             // Closing link tag
             case 'link_close':
             case 'email_close':
                 $arrCache[$strTag] = '</a>';
                 break;
                 // Insert article
             // Insert article
             case 'insert_article':
                 if (($strOutput = $this->getArticle($elements[1], false, true)) !== false) {
                     $arrCache[$strTag] = ltrim($strOutput);
                 } else {
                     $arrCache[$strTag] = '<p class="error">' . sprintf($GLOBALS['TL_LANG']['MSC']['invalidPage'], $elements[1]) . '</p>';
                 }
                 break;
                 // Insert content element
             // Insert content element
             case 'insert_content':
                 $arrCache[$strTag] = $this->getContentElement($elements[1]);
                 break;
                 // Insert module
             // Insert module
             case 'insert_module':
                 $arrCache[$strTag] = $this->getFrontendModule($elements[1]);
                 break;
                 // Insert form
             // Insert form
             case 'insert_form':
                 $arrCache[$strTag] = $this->getForm($elements[1]);
                 break;
                 // Article
             // Article
             case 'article':
             case 'article_open':
             case 'article_url':
             case 'article_title':
                 if (($objArticle = \ArticleModel::findByIdOrAlias($elements[1])) === null || !($objPid = $objArticle->getRelated('pid')) instanceof PageModel) {
                     break;
                 }
                 /** @var PageModel $objPid */
                 $strUrl = $objPid->getFrontendUrl('/articles/' . ($objArticle->alias ?: $objArticle->id));
                 // Replace the tag
                 switch (strtolower($elements[0])) {
                     case 'article':
                         $arrCache[$strTag] = sprintf('<a href="%s" title="%s">%s</a>', $strUrl, \StringUtil::specialchars($objArticle->title), $objArticle->title);
                         break;
                     case 'article_open':
                         $arrCache[$strTag] = sprintf('<a href="%s" title="%s">', $strUrl, \StringUtil::specialchars($objArticle->title));
                         break;
                     case 'article_url':
                         $arrCache[$strTag] = $strUrl;
                         break;
                     case 'article_title':
                         $arrCache[$strTag] = \StringUtil::specialchars($objArticle->title);
                         break;
                 }
                 break;
                 // Article teaser
             // Article teaser
             case 'article_teaser':
                 $objTeaser = \ArticleModel::findByIdOrAlias($elements[1]);
                 if ($objTeaser !== null) {
                     $arrCache[$strTag] = \StringUtil::toHtml5($objTeaser->teaser);
                 }
                 break;
                 // Last update
             // Last update
             case 'last_update':
                 $strQuery = "SELECT MAX(tstamp) AS tc";
                 $bundles = \System::getContainer()->getParameter('kernel.bundles');
                 if (isset($bundles['ContaoNewsBundle'])) {
                     $strQuery .= ", (SELECT MAX(tstamp) FROM tl_news) AS tn";
                 }
                 if (isset($bundles['ContaoCalendarBundle'])) {
                     $strQuery .= ", (SELECT MAX(tstamp) FROM tl_calendar_events) AS te";
                 }
                 $strQuery .= " FROM tl_content";
                 $objUpdate = \Database::getInstance()->query($strQuery);
                 if ($objUpdate->numRows) {
                     $arrCache[$strTag] = \Date::parse($elements[1] ?: \Config::get('datimFormat'), max($objUpdate->tc, $objUpdate->tn, $objUpdate->te));
                 }
                 break;
                 // Version
             // Version
             case 'version':
                 $arrCache[$strTag] = VERSION . '.' . BUILD;
                 break;
                 // Request token
             // Request token
             case 'request_token':
                 $arrCache[$strTag] = REQUEST_TOKEN;
                 break;
                 // POST data
             // POST data
             case 'post':
                 $arrCache[$strTag] = \Input::post($elements[1]);
                 break;
                 // Mobile/desktop toggle (see #6469)
             // Mobile/desktop toggle (see #6469)
             case 'toggle_view':
                 $strUrl = ampersand(\Environment::get('request'));
                 $strGlue = strpos($strUrl, '?') === false ? '?' : '&amp;';
                 if (\Input::cookie('TL_VIEW') == 'mobile' || \Environment::get('agent')->mobile && \Input::cookie('TL_VIEW') != 'desktop') {
                     $arrCache[$strTag] = '<a href="' . $strUrl . $strGlue . 'toggle_view=desktop" class="toggle_desktop" title="' . \StringUtil::specialchars($GLOBALS['TL_LANG']['MSC']['toggleDesktop'][1]) . '">' . $GLOBALS['TL_LANG']['MSC']['toggleDesktop'][0] . '</a>';
                 } else {
                     $arrCache[$strTag] = '<a href="' . $strUrl . $strGlue . 'toggle_view=mobile" class="toggle_mobile" title="' . \StringUtil::specialchars($GLOBALS['TL_LANG']['MSC']['toggleMobile'][1]) . '">' . $GLOBALS['TL_LANG']['MSC']['toggleMobile'][0] . '</a>';
                 }
                 break;
                 // Conditional tags (if)
             // Conditional tags (if)
             case 'iflng':
                 if ($elements[1] != '' && $elements[1] != $objPage->language) {
                     for (; $_rit < $_cnt; $_rit += 2) {
                         if ($tags[$_rit + 1] == 'iflng' || $tags[$_rit + 1] == 'iflng::' . $objPage->language) {
                             break;
                         }
                     }
                 }
                 unset($arrCache[$strTag]);
                 break;
                 // Conditional tags (if not)
             // Conditional tags (if not)
             case 'ifnlng':
                 if ($elements[1] != '') {
                     $langs = \StringUtil::trimsplit(',', $elements[1]);
                     if (in_array($objPage->language, $langs)) {
                         for (; $_rit < $_cnt; $_rit += 2) {
                             if ($tags[$_rit + 1] == 'ifnlng') {
                                 break;
                             }
                         }
                     }
                 }
                 unset($arrCache[$strTag]);
                 break;
                 // Environment
             // Environment
             case 'env':
                 switch ($elements[1]) {
                     case 'host':
                         $arrCache[$strTag] = \Idna::decode(\Environment::get('host'));
                         break;
                     case 'http_host':
                         $arrCache[$strTag] = \Idna::decode(\Environment::get('httpHost'));
                         break;
                     case 'url':
                         $arrCache[$strTag] = \Idna::decode(\Environment::get('url'));
                         break;
                     case 'path':
                         $arrCache[$strTag] = \Idna::decode(\Environment::get('base'));
                         break;
                     case 'request':
                         $arrCache[$strTag] = \Environment::get('indexFreeRequest');
                         break;
                     case 'ip':
                         $arrCache[$strTag] = \Environment::get('ip');
                         break;
                     case 'referer':
                         $arrCache[$strTag] = $this->getReferer(true);
                         break;
                     case 'files_url':
                         $arrCache[$strTag] = TL_FILES_URL;
                         break;
                     case 'assets_url':
                     case 'plugins_url':
                     case 'script_url':
                         $arrCache[$strTag] = TL_ASSETS_URL;
                         break;
                     case 'base_url':
                         $arrCache[$strTag] = \System::getContainer()->get('request_stack')->getCurrentRequest()->getBaseUrl();
                         break;
                 }
                 break;
                 // Page
             // Page
             case 'page':
                 if ($elements[1] == 'pageTitle' && $objPage->pageTitle == '') {
                     $elements[1] = 'title';
                 } elseif ($elements[1] == 'parentPageTitle' && $objPage->parentPageTitle == '') {
                     $elements[1] = 'parentTitle';
                 } elseif ($elements[1] == 'mainPageTitle' && $objPage->mainPageTitle == '') {
                     $elements[1] = 'mainTitle';
                 }
                 // Do not use \StringUtil::specialchars() here (see #4687)
                 $arrCache[$strTag] = $objPage->{$elements[1]};
                 break;
                 // User agent
             // User agent
             case 'ua':
                 $ua = \Environment::get('agent');
                 if ($elements[1] != '') {
                     $arrCache[$strTag] = $ua->{$elements[1]};
                 } else {
                     $arrCache[$strTag] = '';
                 }
                 break;
                 // Abbreviations
             // Abbreviations
             case 'abbr':
             case 'acronym':
                 if ($elements[1] != '') {
                     $arrCache[$strTag] = '<abbr title="' . \StringUtil::specialchars($elements[1]) . '">';
                 } else {
                     $arrCache[$strTag] = '</abbr>';
                 }
                 break;
                 // Images
             // Images
             case 'image':
             case 'picture':
                 $width = null;
                 $height = null;
                 $alt = '';
                 $class = '';
                 $rel = '';
                 $strFile = $elements[1];
                 $mode = '';
                 $size = null;
                 $strTemplate = 'picture_default';
                 // Take arguments
                 if (strpos($elements[1], '?') !== false) {
                     $arrChunks = explode('?', urldecode($elements[1]), 2);
                     $strSource = \StringUtil::decodeEntities($arrChunks[1]);
                     $strSource = str_replace('[&]', '&', $strSource);
                     $arrParams = explode('&', $strSource);
                     foreach ($arrParams as $strParam) {
                         list($key, $value) = explode('=', $strParam);
                         switch ($key) {
                             case 'width':
                                 $width = $value;
                                 break;
                             case 'height':
                                 $height = $value;
                                 break;
                             case 'alt':
                                 $alt = $value;
                                 break;
                             case 'class':
                                 $class = $value;
                                 break;
                             case 'rel':
                                 $rel = $value;
                                 break;
                             case 'mode':
                                 $mode = $value;
                                 break;
                             case 'size':
                                 $size = (int) $value;
                                 break;
                             case 'template':
                                 $strTemplate = preg_replace('/[^a-z0-9_]/i', '', $value);
                                 break;
                         }
                     }
                     $strFile = $arrChunks[0];
                 }
                 if (\Validator::isUuid($strFile)) {
                     // Handle UUIDs
                     $objFile = \FilesModel::findByUuid($strFile);
                     if ($objFile === null) {
                         $arrCache[$strTag] = '';
                         break;
                     }
                     $strFile = $objFile->path;
                 } elseif (is_numeric($strFile)) {
                     // Handle numeric IDs (see #4805)
                     $objFile = \FilesModel::findByPk($strFile);
                     if ($objFile === null) {
                         $arrCache[$strTag] = '';
                         break;
                     }
                     $strFile = $objFile->path;
                 } else {
                     // Check the path
                     if (\Validator::isInsecurePath($strFile)) {
                         throw new \RuntimeException('Invalid path ' . $strFile);
                     }
                 }
                 // Check the maximum image width
                 if (\Config::get('maxImageWidth') > 0 && $width > \Config::get('maxImageWidth')) {
                     $width = \Config::get('maxImageWidth');
                     $height = null;
                 }
                 // Generate the thumbnail image
                 try {
                     // Image
                     if (strtolower($elements[0]) == 'image') {
                         $dimensions = '';
                         $src = \System::getContainer()->get('contao.image.image_factory')->create(TL_ROOT . '/' . rawurldecode($strFile), array($width, $height, $mode))->getUrl(TL_ROOT);
                         $objFile = new \File(rawurldecode($src));
                         // Add the image dimensions
                         if (($imgSize = $objFile->imageSize) !== false) {
                             $dimensions = ' width="' . \StringUtil::specialchars($imgSize[0]) . '" height="' . \StringUtil::specialchars($imgSize[1]) . '"';
                         }
                         $arrCache[$strTag] = '<img src="' . TL_FILES_URL . $src . '" ' . $dimensions . ' alt="' . \StringUtil::specialchars($alt) . '"' . ($class != '' ? ' class="' . \StringUtil::specialchars($class) . '"' : '') . '>';
                     } else {
                         $picture = \System::getContainer()->get('contao.image.picture_factory')->create(TL_ROOT . '/' . $strFile, $size);
                         $picture = array('img' => $picture->getImg(TL_ROOT), 'sources' => $picture->getSources(TL_ROOT));
                         $picture['alt'] = $alt;
                         $picture['class'] = $class;
                         $pictureTemplate = new \FrontendTemplate($strTemplate);
                         $pictureTemplate->setData($picture);
                         $arrCache[$strTag] = $pictureTemplate->parse();
                     }
                     // Add a lightbox link
                     if ($rel != '') {
                         if (strncmp($rel, 'lightbox', 8) !== 0) {
                             $attribute = ' rel="' . \StringUtil::specialchars($rel) . '"';
                         } else {
                             $attribute = ' data-lightbox="' . \StringUtil::specialchars(substr($rel, 8)) . '"';
                         }
                         $arrCache[$strTag] = '<a href="' . TL_FILES_URL . $strFile . '"' . ($alt != '' ? ' title="' . \StringUtil::specialchars($alt) . '"' : '') . $attribute . '>' . $arrCache[$strTag] . '</a>';
                     }
                 } catch (\Exception $e) {
                     $arrCache[$strTag] = '';
                 }
                 break;
                 // Files (UUID or template path)
             // Files (UUID or template path)
             case 'file':
                 if (\Validator::isUuid($elements[1])) {
                     $objFile = \FilesModel::findByUuid($elements[1]);
                     if ($objFile !== null) {
                         $arrCache[$strTag] = $objFile->path;
                         break;
                     }
                 }
                 $arrGet = $_GET;
                 \Input::resetCache();
                 $strFile = $elements[1];
                 // Take arguments and add them to the $_GET array
                 if (strpos($elements[1], '?') !== false) {
                     $arrChunks = explode('?', urldecode($elements[1]));
                     $strSource = \StringUtil::decodeEntities($arrChunks[1]);
                     $strSource = str_replace('[&]', '&', $strSource);
                     $arrParams = explode('&', $strSource);
                     foreach ($arrParams as $strParam) {
                         $arrParam = explode('=', $strParam);
                         $_GET[$arrParam[0]] = $arrParam[1];
                     }
                     $strFile = $arrChunks[0];
                 }
                 // Check the path
                 if (\Validator::isInsecurePath($strFile)) {
                     throw new \RuntimeException('Invalid path ' . $strFile);
                 }
                 // Include .php, .tpl, .xhtml and .html5 files
                 if (preg_match('/\\.(php|tpl|xhtml|html5)$/', $strFile) && file_exists(TL_ROOT . '/templates/' . $strFile)) {
                     ob_start();
                     include TL_ROOT . '/templates/' . $strFile;
                     $arrCache[$strTag] = ob_get_clean();
                 }
                 $_GET = $arrGet;
                 \Input::resetCache();
                 break;
                 // HOOK: pass unknown tags to callback functions
             // HOOK: pass unknown tags to callback functions
             default:
                 if (isset($GLOBALS['TL_HOOKS']['replaceInsertTags']) && is_array($GLOBALS['TL_HOOKS']['replaceInsertTags'])) {
                     foreach ($GLOBALS['TL_HOOKS']['replaceInsertTags'] as $callback) {
                         $this->import($callback[0]);
                         $varValue = $this->{$callback[0]}->{$callback[1]}($tag, $blnCache, $arrCache[$strTag], $flags, $tags, $arrCache, $_rit, $_cnt);
                         // see #6672
                         // Replace the tag and stop the loop
                         if ($varValue !== false) {
                             $arrCache[$strTag] = $varValue;
                             break;
                         }
                     }
                 }
                 \System::getContainer()->get('monolog.logger.contao')->log(LogLevel::INFO, 'Unknown insert tag: ' . $strTag);
                 break;
         }
         // Handle the flags
         if (!empty($flags)) {
             foreach ($flags as $flag) {
                 switch ($flag) {
                     case 'addslashes':
                     case 'standardize':
                     case 'ampersand':
                     case 'specialchars':
                     case 'nl2br':
                     case 'nl2br_pre':
                     case 'strtolower':
                     case 'utf8_strtolower':
                     case 'strtoupper':
                     case 'utf8_strtoupper':
                     case 'ucfirst':
                     case 'lcfirst':
                     case 'ucwords':
                     case 'trim':
                     case 'rtrim':
                     case 'ltrim':
                     case 'utf8_romanize':
                     case 'urlencode':
                     case 'rawurlencode':
                         $arrCache[$strTag] = $flag($arrCache[$strTag]);
                         break;
                     case 'encodeEmail':
                         $arrCache[$strTag] = \StringUtil::$flag($arrCache[$strTag]);
                         break;
                     case 'number_format':
                         $arrCache[$strTag] = \System::getFormattedNumber($arrCache[$strTag], 0);
                         break;
                     case 'currency_format':
                         $arrCache[$strTag] = \System::getFormattedNumber($arrCache[$strTag], 2);
                         break;
                     case 'readable_size':
                         $arrCache[$strTag] = \System::getReadableSize($arrCache[$strTag]);
                         break;
                     case 'flatten':
                         if (!is_array($arrCache[$strTag])) {
                             break;
                         }
                         $it = new \RecursiveIteratorIterator(new \RecursiveArrayIterator($arrCache[$strTag]));
                         $result = array();
                         foreach ($it as $leafValue) {
                             $keys = array();
                             foreach (range(0, $it->getDepth()) as $depth) {
                                 $keys[] = $it->getSubIterator($depth)->key();
                             }
                             $result[] = implode('.', $keys) . ': ' . $leafValue;
                         }
                         $arrCache[$strTag] = implode(', ', $result);
                         break;
                         // HOOK: pass unknown flags to callback functions
                     // HOOK: pass unknown flags to callback functions
                     default:
                         if (isset($GLOBALS['TL_HOOKS']['insertTagFlags']) && is_array($GLOBALS['TL_HOOKS']['insertTagFlags'])) {
                             foreach ($GLOBALS['TL_HOOKS']['insertTagFlags'] as $callback) {
                                 $this->import($callback[0]);
                                 $varValue = $this->{$callback[0]}->{$callback[1]}($flag, $tag, $arrCache[$strTag], $flags, $blnCache, $tags, $arrCache, $_rit, $_cnt);
                                 // see #5806
                                 // Replace the tag and stop the loop
                                 if ($varValue !== false) {
                                     $arrCache[$strTag] = $varValue;
                                     break;
                                 }
                             }
                         }
                         \System::getContainer()->get('monolog.logger.contao')->log(LogLevel::INFO, 'Unknown insert tag flag: ' . $flag);
                         break;
                 }
             }
         }
         $strBuffer .= $arrCache[$strTag];
     }
     return \StringUtil::restoreBasicEntities($strBuffer);
 }