JEMBOT MAWOT Bypass Shell
<?php
/**
* @package Joomla.Platform
* @subpackage Filter
*
* @copyright Copyright (C) 2005 - 2016 Open Source Matters, Inc. All rights reserved.
* @license GNU General Public License version 2 or later; see LICENSE
*/
defined('JPATH_PLATFORM') or die;
use Joomla\Filter\InputFilter;
use Joomla\String\StringHelper;
/**
* JFilterInput is a class for filtering input from any data source
*
* Forked from the php input filter library by: Daniel Morris <dan@rootcube.com>
* Original Contributors: Gianpaolo Racca, Ghislain Picard, Marco Wandschneider, Chris Tobin and Andrew Eddie.
*
* @since 11.1
*/
class JFilterInput extends InputFilter
{
/**
* A flag for Unicode Supplementary Characters (4-byte Unicode character) stripping.
*
* @var integer
*
* @since 3.5
*/
public $stripUSC = 0;
/**
* Constructor for inputFilter class. Only first parameter is required.
*
* @param array $tagsArray List of user-defined tags
* @param array $attrArray List of user-defined attributes
* @param integer $tagsMethod WhiteList method = 0, BlackList method = 1
* @param integer $attrMethod WhiteList method = 0, BlackList method = 1
* @param integer $xssAuto Only auto clean essentials = 0, Allow clean blacklisted tags/attr = 1
* @param integer $stripUSC Strip 4-byte unicode characters = 1, no strip = 0, ask the database driver = -1
*
* @since 11.1
*/
public function __construct($tagsArray = array(), $attrArray = array(), $tagsMethod = 0, $attrMethod = 0, $xssAuto = 1, $stripUSC = -1)
{
// Make sure user defined arrays are in lowercase
$tagsArray = array_map('strtolower', (array) $tagsArray);
$attrArray = array_map('strtolower', (array) $attrArray);
// Assign member variables
$this->tagsArray = $tagsArray;
$this->attrArray = $attrArray;
$this->tagsMethod = $tagsMethod;
$this->attrMethod = $attrMethod;
$this->xssAuto = $xssAuto;
$this->stripUSC = $stripUSC;
/**
* If Unicode Supplementary Characters stripping is not set we have to check with the database driver. If the
* driver does not support USCs (i.e. there is no utf8mb4 support) we will enable USC stripping.
*/
if ($this->stripUSC == -1)
{
try
{
// Get the database driver
$db = JFactory::getDbo();
// This trick is required to let the driver determine the utf-8 multibyte support
$db->connect();
// And now we can decide if we should strip USCs
$this->stripUSC = $db->hasUTF8mb4Support() ? 0 : 1;
}
catch (RuntimeException $e)
{
// Could not connect to MySQL. Strip USC to be on the safe side.
$this->stripUSC = 1;
}
}
}
/**
* Returns an input filter object, only creating it if it doesn't already exist.
*
* @param array $tagsArray List of user-defined tags
* @param array $attrArray List of user-defined attributes
* @param integer $tagsMethod WhiteList method = 0, BlackList method = 1
* @param integer $attrMethod WhiteList method = 0, BlackList method = 1
* @param integer $xssAuto Only auto clean essentials = 0, Allow clean blacklisted tags/attr = 1
* @param integer $stripUSC Strip 4-byte unicode characters = 1, no strip = 0, ask the database driver = -1
*
* @return JFilterInput The JFilterInput object.
*
* @since 11.1
*/
public static function &getInstance($tagsArray = array(), $attrArray = array(), $tagsMethod = 0, $attrMethod = 0, $xssAuto = 1, $stripUSC = -1)
{
$sig = md5(serialize(array($tagsArray, $attrArray, $tagsMethod, $attrMethod, $xssAuto)));
if (empty(self::$instances[$sig]))
{
self::$instances[$sig] = new JFilterInput($tagsArray, $attrArray, $tagsMethod, $attrMethod, $xssAuto, $stripUSC);
}
return self::$instances[$sig];
}
/**
* Method to be called by another php script. Processes for XSS and
* specified bad code.
*
* @param mixed $source Input string/array-of-string to be 'cleaned'
* @param string $type The return type for the variable:
* INT: An integer, or an array of integers,
* UINT: An unsigned integer, or an array of unsigned integers,
* FLOAT: A floating point number, or an array of floating point numbers,
* BOOLEAN: A boolean value,
* WORD: A string containing A-Z or underscores only (not case sensitive),
* ALNUM: A string containing A-Z or 0-9 only (not case sensitive),
* CMD: A string containing A-Z, 0-9, underscores, periods or hyphens (not case sensitive),
* BASE64: A string containing A-Z, 0-9, forward slashes, plus or equals (not case sensitive),
* STRING: A fully decoded and sanitised string (default),
* HTML: A sanitised string,
* ARRAY: An array,
* PATH: A sanitised file path, or an array of sanitised file paths,
* TRIM: A string trimmed from normal, non-breaking and multibyte spaces
* USERNAME: Do not use (use an application specific filter),
* RAW: The raw string is returned with no filtering,
* unknown: An unknown filter will act like STRING. If the input is an array it will return an
* array of fully decoded and sanitised strings.
*
* @return mixed 'Cleaned' version of input parameter
*
* @since 11.1
*/
public function clean($source, $type = 'string')
{
// Strip Unicode Supplementary Characters when requested to do so
if ($this->stripUSC)
{
// Alternatively: preg_replace('/[\x{10000}-\x{10FFFF}]/u', "\xE2\xAF\x91", $source) but it'd be slower.
$source = $this->stripUSC($source);
}
// Handle the type constraint cases
switch (strtoupper($type))
{
case 'INT':
case 'INTEGER':
$pattern = '/[-+]?[0-9]+/';
if (is_array($source))
{
$result = array();
// Itterate through the array
foreach ($source as $eachString)
{
preg_match($pattern, (string) $eachString, $matches);
$result[] = isset($matches[0]) ? (int) $matches[0] : 0;
}
}
else
{
preg_match($pattern, (string) $source, $matches);
$result = isset($matches[0]) ? (int) $matches[0] : 0;
}
break;
case 'UINT':
$pattern = '/[-+]?[0-9]+/';
if (is_array($source))
{
$result = array();
// Itterate through the array
foreach ($source as $eachString)
{
preg_match($pattern, (string) $eachString, $matches);
$result[] = isset($matches[0]) ? abs((int) $matches[0]) : 0;
}
}
else
{
preg_match($pattern, (string) $source, $matches);
$result = isset($matches[0]) ? abs((int) $matches[0]) : 0;
}
break;
case 'FLOAT':
case 'DOUBLE':
$pattern = '/[-+]?[0-9]+(\.[0-9]+)?([eE][-+]?[0-9]+)?/';
if (is_array($source))
{
$result = array();
// Itterate through the array
foreach ($source as $eachString)
{
preg_match($pattern, (string) $eachString, $matches);
$result[] = isset($matches[0]) ? (float) $matches[0] : 0;
}
}
else
{
preg_match($pattern, (string) $source, $matches);
$result = isset($matches[0]) ? (float) $matches[0] : 0;
}
break;
case 'BOOL':
case 'BOOLEAN':
if (is_array($source))
{
$result = array();
// Iterate through the array
foreach ($source as $eachString)
{
$result[] = (bool) $eachString;
}
}
else
{
$result = (bool) $source;
}
break;
case 'WORD':
$pattern = '/[^A-Z_]/i';
if (is_array($source))
{
$result = array();
// Iterate through the array
foreach ($source as $eachString)
{
$result[] = (string) preg_replace($pattern, '', $eachString);
}
}
else
{
$result = (string) preg_replace($pattern, '', $source);
}
break;
case 'ALNUM':
$pattern = '/[^A-Z0-9]/i';
if (is_array($source))
{
$result = array();
// Iterate through the array
foreach ($source as $eachString)
{
$result[] = (string) preg_replace($pattern, '', $eachString);
}
}
else
{
$result = (string) preg_replace($pattern, '', $source);
}
break;
case 'CMD':
$pattern = '/[^A-Z0-9_\.-]/i';
if (is_array($source))
{
$result = array();
// Iterate through the array
foreach ($source as $eachString)
{
$cleaned = (string) preg_replace($pattern, '', $eachString);
$result[] = ltrim($cleaned, '.');
}
}
else
{
$result = (string) preg_replace($pattern, '', $source);
$result = ltrim($result, '.');
}
break;
case 'BASE64':
$pattern = '/[^A-Z0-9\/+=]/i';
if (is_array($source))
{
$result = array();
// Iterate through the array
foreach ($source as $eachString)
{
$result[] = (string) preg_replace($pattern, '', $eachString);
}
}
else
{
$result = (string) preg_replace($pattern, '', $source);
}
break;
case 'STRING':
if (is_array($source))
{
$result = array();
// Iterate through the array
foreach ($source as $eachString)
{
$result[] = (string) $this->remove($this->decode((string) $eachString));
}
}
else
{
$result = (string) $this->remove($this->decode((string) $source));
}
break;
case 'HTML':
if (is_array($source))
{
$result = array();
// Iterate through the array
foreach ($source as $eachString)
{
$result[] = (string) $this->remove((string) $eachString);
}
}
else
{
$result = (string) $this->remove((string) $source);
}
break;
case 'ARRAY':
$result = (array) $source;
break;
case 'PATH':
$pattern = '/^[A-Za-z0-9_\/-]+[A-Za-z0-9_\.-]*([\\\\\/][A-Za-z0-9_-]+[A-Za-z0-9_\.-]*)*$/';
if (is_array($source))
{
$result = array();
// Itterate through the array
foreach ($source as $eachString)
{
preg_match($pattern, (string) $eachString, $matches);
$result[] = isset($matches[0]) ? (string) $matches[0] : '';
}
}
else
{
preg_match($pattern, $source, $matches);
$result = isset($matches[0]) ? (string) $matches[0] : '';
}
break;
case 'TRIM':
if (is_array($source))
{
$result = array();
// Iterate through the array
foreach ($source as $eachString)
{
$cleaned = (string) trim($eachString);
$cleaned = StringHelper::trim($cleaned, chr(0xE3) . chr(0x80) . chr(0x80));
$result[] = StringHelper::trim($cleaned, chr(0xC2) . chr(0xA0));
}
}
else
{
$result = (string) trim($source);
$result = StringHelper::trim($result, chr(0xE3) . chr(0x80) . chr(0x80));
$result = StringHelper::trim($result, chr(0xC2) . chr(0xA0));
}
break;
case 'USERNAME':
$pattern = '/[\x00-\x1F\x7F<>"\'%&]/';
if (is_array($source))
{
$result = array();
// Iterate through the array
foreach ($source as $eachString)
{
$result[] = (string) preg_replace($pattern, '', $eachString);
}
}
else
{
$result = (string) preg_replace($pattern, '', $source);
}
break;
case 'RAW':
$result = $source;
break;
default:
// Are we dealing with an array?
if (is_array($source))
{
foreach ($source as $key => $value)
{
// Filter element for XSS and other 'bad' code etc.
if (is_string($value))
{
$source[$key] = $this->_remove($this->_decode($value));
}
}
$result = $source;
}
else
{
// Or a string?
if (is_string($source) && !empty($source))
{
// Filter source for XSS and other 'bad' code etc.
$result = $this->_remove($this->_decode($source));
}
else
{
// Not an array or string... return the passed parameter
$result = $source;
}
}
break;
}
return $result;
}
/**
* Function to punyencode utf8 mail when saving content
*
* @param string $text The strings to encode
*
* @return string The punyencoded mail
*
* @since 3.5
*/
public function emailToPunycode($text)
{
$pattern = '/(("mailto:)+[\w\.\-\+]+\@[^"?]+\.+[^."?]+("|\?))/';
if (preg_match_all($pattern, $text, $matches))
{
foreach ($matches[0] as $match)
{
$match = (string) str_replace(array('?', '"'), '', $match);
$text = (string) str_replace($match, JStringPunycode::emailToPunycode($match), $text);
}
}
return $text;
}
/**
* Checks an uploaded for suspicious naming and potential PHP contents which could indicate a hacking attempt.
*
* The options you can define are:
* null_byte Prevent files with a null byte in their name (buffer overflow attack)
* forbidden_extensions Do not allow these strings anywhere in the file's extension
* php_tag_in_content Do not allow `<?php` tag in content
* shorttag_in_content Do not allow short tag `<?` in content
* shorttag_extensions Which file extensions to scan for short tags in content
* fobidden_ext_in_content Do not allow forbidden_extensions anywhere in content
* php_ext_content_extensions Which file extensions to scan for .php in content
*
* This code is an adaptation and improvement of Admin Tools' UploadShield feature,
* relicensed and contributed by its author.
*
* @param array $file An uploaded file descriptor
* @param array $options The scanner options (see the code for details)
*
* @return boolean True of the file is safe
*
* @since 3.4
*/
public static function isSafeFile($file, $options = array())
{
$defaultOptions = array(
// Null byte in file name
'null_byte' => true,
// Forbidden string in extension (e.g. php matched .php, .xxx.php, .php.xxx and so on)
'forbidden_extensions' => array(
'php', 'phps', 'pht', 'phtml', 'php3', 'php4', 'php5', 'php6', 'php7', 'inc', 'pl', 'cgi', 'fcgi', 'java', 'jar', 'py',
),
// <?php tag in file contents
'php_tag_in_content' => true,
// <? tag in file contents
'shorttag_in_content' => true,
// Which file extensions to scan for short tags
'shorttag_extensions' => array(
'inc', 'phps', 'class', 'php3', 'php4', 'php5', 'txt', 'dat', 'tpl', 'tmpl',
),
// Forbidden extensions anywhere in the content
'fobidden_ext_in_content' => true,
// Which file extensions to scan for .php in the content
'php_ext_content_extensions' => array('zip', 'rar', 'tar', 'gz', 'tgz', 'bz2', 'tbz', 'jpa'),
);
$options = array_merge($defaultOptions, $options);
// Make sure we can scan nested file descriptors
$descriptors = $file;
if (isset($file['name']) && isset($file['tmp_name']))
{
$descriptors = self::decodeFileData(
array(
$file['name'],
$file['type'],
$file['tmp_name'],
$file['error'],
$file['size'],
)
);
}
// Handle non-nested descriptors (single files)
if (isset($descriptors['name']))
{
$descriptors = array($descriptors);
}
// Scan all descriptors detected
foreach ($descriptors as $fileDescriptor)
{
if (!isset($fileDescriptor['name']))
{
// This is a nested descriptor. We have to recurse.
if (!self::isSafeFile($fileDescriptor, $options))
{
return false;
}
continue;
}
$tempNames = $fileDescriptor['tmp_name'];
$intendedNames = $fileDescriptor['name'];
if (!is_array($tempNames))
{
$tempNames = array($tempNames);
}
if (!is_array($intendedNames))
{
$intendedNames = array($intendedNames);
}
$len = count($tempNames);
for ($i = 0; $i < $len; $i++)
{
$tempName = array_shift($tempNames);
$intendedName = array_shift($intendedNames);
// 1. Null byte check
if ($options['null_byte'])
{
if (strstr($intendedName, "\x00"))
{
return false;
}
}
// 2. PHP-in-extension check (.php, .php.xxx[.yyy[.zzz[...]]], .xxx[.yyy[.zzz[...]]].php)
if (!empty($options['forbidden_extensions']))
{
$explodedName = explode('.', $intendedName);
$explodedName = array_reverse($explodedName);
array_pop($explodedName);
$explodedName = array_map('strtolower', $explodedName);
/*
* DO NOT USE array_intersect HERE! array_intersect expects the two arrays to
* be set, i.e. they should have unique values.
*/
foreach ($options['forbidden_extensions'] as $ext)
{
if (in_array($ext, $explodedName))
{
return false;
}
}
}
// 3. File contents scanner (PHP tag in file contents)
if ($options['php_tag_in_content'] || $options['shorttag_in_content']
|| ($options['fobidden_ext_in_content'] && !empty($options['forbidden_extensions'])))
{
$fp = @fopen($tempName, 'r');
if ($fp !== false)
{
$data = '';
while (!feof($fp))
{
$data .= @fread($fp, 131072);
if ($options['php_tag_in_content'] && stristr($data, '<?php'))
{
return false;
}
if ($options['shorttag_in_content'])
{
$suspiciousExtensions = $options['shorttag_extensions'];
if (empty($suspiciousExtensions))
{
$suspiciousExtensions = array(
'inc', 'phps', 'class', 'php3', 'php4', 'txt', 'dat', 'tpl', 'tmpl',
);
}
/*
* DO NOT USE array_intersect HERE! array_intersect expects the two arrays to
* be set, i.e. they should have unique values.
*/
$collide = false;
foreach ($suspiciousExtensions as $ext)
{
if (in_array($ext, $explodedName))
{
$collide = true;
break;
}
}
if ($collide)
{
// These are suspicious text files which may have the short tag (<?) in them
if (strstr($data, '<?'))
{
return false;
}
}
}
if ($options['fobidden_ext_in_content'] && !empty($options['forbidden_extensions']))
{
$suspiciousExtensions = $options['php_ext_content_extensions'];
if (empty($suspiciousExtensions))
{
$suspiciousExtensions = array(
'zip', 'rar', 'tar', 'gz', 'tgz', 'bz2', 'tbz', 'jpa',
);
}
/*
* DO NOT USE array_intersect HERE! array_intersect expects the two arrays to
* be set, i.e. they should have unique values.
*/
$collide = false;
foreach ($suspiciousExtensions as $ext)
{
if (in_array($ext, $explodedName))
{
$collide = true;
break;
}
}
if ($collide)
{
/*
* These are suspicious text files which may have an executable
* file extension in them
*/
foreach ($options['forbidden_extensions'] as $ext)
{
if (strstr($data, '.' . $ext))
{
return false;
}
}
}
}
/*
* This makes sure that we don't accidentally skip a <?php tag if it's across
* a read boundary, even on multibyte strings
*/
$data = substr($data, -10);
}
fclose($fp);
}
}
}
}
return true;
}
/**
* Method to decode a file data array.
*
* @param array $data The data array to decode.
*
* @return array
*
* @since 3.4
*/
protected static function decodeFileData(array $data)
{
$result = array();
if (is_array($data[0]))
{
foreach ($data[0] as $k => $v)
{
$result[$k] = self::decodeFileData(array($data[0][$k], $data[1][$k], $data[2][$k], $data[3][$k], $data[4][$k]));
}
return $result;
}
return array('name' => $data[0], 'type' => $data[1], 'tmp_name' => $data[2], 'error' => $data[3], 'size' => $data[4]);
}
/**
* Internal method to iteratively remove all unwanted tags and attributes
*
* @param string $source Input string to be 'cleaned'
*
* @return string 'Cleaned' version of input parameter
*
* @since 11.1
* @deprecated 4.0 Use JFilterInput::remove() instead
*/
protected function _remove($source)
{
return $this->remove($source);
}
/**
* Internal method to iteratively remove all unwanted tags and attributes
*
* @param string $source Input string to be 'cleaned'
*
* @return string 'Cleaned' version of input parameter
*
* @since 3.5
*/
protected function remove($source)
{
// Iteration provides nested tag protection
do
{
$temp = $source;
$source = $this->_cleanTags($source);
}
while ($temp != $source);
return $source;
}
/**
* Internal method to strip a string of certain tags
*
* @param string $source Input string to be 'cleaned'
*
* @return string 'Cleaned' version of input parameter
*
* @since 11.1
* @deprecated 4.0 Use JFilterInput::cleanTags() instead
*/
protected function _cleanTags($source)
{
return $this->cleanTags($source);
}
/**
* Internal method to strip a string of certain tags
*
* @param string $source Input string to be 'cleaned'
*
* @return string 'Cleaned' version of input parameter
*
* @since 3.5
*/
protected function cleanTags($source)
{
// First, pre-process this for illegal characters inside attribute values
$source = $this->_escapeAttributeValues($source);
// In the beginning we don't really have a tag, so everything is postTag
$preTag = null;
$postTag = $source;
$currentSpace = false;
// Setting to null to deal with undefined variables
$attr = '';
// Is there a tag? If so it will certainly start with a '<'.
$tagOpen_start = strpos($source, '<');
while ($tagOpen_start !== false)
{
// Get some information about the tag we are processing
$preTag .= substr($postTag, 0, $tagOpen_start);
$postTag = substr($postTag, $tagOpen_start);
$fromTagOpen = substr($postTag, 1);
$tagOpen_end = strpos($fromTagOpen, '>');
// Check for mal-formed tag where we have a second '<' before the first '>'
$nextOpenTag = (strlen($postTag) > $tagOpen_start) ? strpos($postTag, '<', $tagOpen_start + 1) : false;
if (($nextOpenTag !== false) && ($nextOpenTag < $tagOpen_end))
{
// At this point we have a mal-formed tag -- remove the offending open
$postTag = substr($postTag, 0, $tagOpen_start) . substr($postTag, $tagOpen_start + 1);
$tagOpen_start = strpos($postTag, '<');
continue;
}
// Let's catch any non-terminated tags and skip over them
if ($tagOpen_end === false)
{
$postTag = substr($postTag, $tagOpen_start + 1);
$tagOpen_start = strpos($postTag, '<');
continue;
}
// Do we have a nested tag?
$tagOpen_nested = strpos($fromTagOpen, '<');
if (($tagOpen_nested !== false) && ($tagOpen_nested < $tagOpen_end))
{
$preTag .= substr($postTag, 0, ($tagOpen_nested + 1));
$postTag = substr($postTag, ($tagOpen_nested + 1));
$tagOpen_start = strpos($postTag, '<');
continue;
}
// Let's get some information about our tag and setup attribute pairs
$tagOpen_nested = (strpos($fromTagOpen, '<') + $tagOpen_start + 1);
$currentTag = substr($fromTagOpen, 0, $tagOpen_end);
$tagLength = strlen($currentTag);
$tagLeft = $currentTag;
$attrSet = array();
$currentSpace = strpos($tagLeft, ' ');
// Are we an open tag or a close tag?
if (substr($currentTag, 0, 1) == '/')
{
// Close Tag
$isCloseTag = true;
list ($tagName) = explode(' ', $currentTag);
$tagName = substr($tagName, 1);
}
else
{
// Open Tag
$isCloseTag = false;
list ($tagName) = explode(' ', $currentTag);
}
/*
* Exclude all "non-regular" tagnames
* OR no tagname
* OR remove if xssauto is on and tag is blacklisted
*/
if ((!preg_match("/^[a-z][a-z0-9]*$/i", $tagName)) || (!$tagName) || ((in_array(strtolower($tagName), $this->tagBlacklist)) && ($this->xssAuto)))
{
$postTag = substr($postTag, ($tagLength + 2));
$tagOpen_start = strpos($postTag, '<');
// Strip tag
continue;
}
/*
* Time to grab any attributes from the tag... need this section in
* case attributes have spaces in the values.
*/
while ($currentSpace !== false)
{
$attr = '';
$fromSpace = substr($tagLeft, ($currentSpace + 1));
$nextEqual = strpos($fromSpace, '=');
$nextSpace = strpos($fromSpace, ' ');
$openQuotes = strpos($fromSpace, '"');
$closeQuotes = strpos(substr($fromSpace, ($openQuotes + 1)), '"') + $openQuotes + 1;
$startAtt = '';
$startAttPosition = 0;
// Find position of equal and open quotes ignoring
if (preg_match('#\s*=\s*\"#', $fromSpace, $matches, PREG_OFFSET_CAPTURE))
{
$startAtt = $matches[0][0];
$startAttPosition = $matches[0][1];
$closeQuotes = strpos(substr($fromSpace, ($startAttPosition + strlen($startAtt))), '"') + $startAttPosition + strlen($startAtt);
$nextEqual = $startAttPosition + strpos($startAtt, '=');
$openQuotes = $startAttPosition + strpos($startAtt, '"');
$nextSpace = strpos(substr($fromSpace, $closeQuotes), ' ') + $closeQuotes;
}
// Do we have an attribute to process? [check for equal sign]
if ($fromSpace != '/' && (($nextEqual && $nextSpace && $nextSpace < $nextEqual) || !$nextEqual))
{
if (!$nextEqual)
{
$attribEnd = strpos($fromSpace, '/') - 1;
}
else
{
$attribEnd = $nextSpace - 1;
}
// If there is an ending, use this, if not, do not worry.
if ($attribEnd > 0)
{
$fromSpace = substr($fromSpace, $attribEnd + 1);
}
}
if (strpos($fromSpace, '=') !== false)
{
/*
* If the attribute value is wrapped in quotes we need to grab the substring from
* the closing quote, otherwise grab until the next space.
*/
if (($openQuotes !== false) && (strpos(substr($fromSpace, ($openQuotes + 1)), '"') !== false))
{
$attr = substr($fromSpace, 0, ($closeQuotes + 1));
}
else
{
$attr = substr($fromSpace, 0, $nextSpace);
}
}
// No more equal signs so add any extra text in the tag into the attribute array [eg. checked]
else
{
if ($fromSpace != '/')
{
$attr = substr($fromSpace, 0, $nextSpace);
}
}
// Last Attribute Pair
if (!$attr && $fromSpace != '/')
{
$attr = $fromSpace;
}
// Add attribute pair to the attribute array
$attrSet[] = $attr;
// Move search point and continue iteration
$tagLeft = substr($fromSpace, strlen($attr));
$currentSpace = strpos($tagLeft, ' ');
}
// Is our tag in the user input array?
$tagFound = in_array(strtolower($tagName), $this->tagsArray);
// If the tag is allowed let's append it to the output string.
if ((!$tagFound && $this->tagsMethod) || ($tagFound && !$this->tagsMethod))
{
// Reconstruct tag with allowed attributes
if (!$isCloseTag)
{
// Open or single tag
$attrSet = $this->_cleanAttributes($attrSet);
$preTag .= '<' . $tagName;
for ($i = 0, $count = count($attrSet); $i < $count; $i++)
{
$preTag .= ' ' . $attrSet[$i];
}
// Reformat single tags to XHTML
if (strpos($fromTagOpen, '</' . $tagName))
{
$preTag .= '>';
}
else
{
$preTag .= ' />';
}
}
// Closing tag
else
{
$preTag .= '</' . $tagName . '>';
}
}
// Find next tag's start and continue iteration
$postTag = substr($postTag, ($tagLength + 2));
$tagOpen_start = strpos($postTag, '<');
}
// Append any code after the end of tags and return
if ($postTag != '<')
{
$preTag .= $postTag;
}
return $preTag;
}
/**
* Internal method to strip a tag of certain attributes
*
* @param array $attrSet Array of attribute pairs to filter
*
* @return array Filtered array of attribute pairs
*
* @since 11.1
* @deprecated 4.0 Use JFilterInput::cleanAttributes() instead
*/
protected function _cleanAttributes($attrSet)
{
return $this->cleanAttributes($attrSet);
}
/**
* Escape < > and " inside attribute values
*
* @param string $source The source string.
*
* @return string Filtered string
*
* @since 3.5
*/
protected function escapeAttributeValues($source)
{
$alreadyFiltered = '';
$remainder = $source;
$badChars = array('<', '"', '>');
$escapedChars = array('<', '"', '>');
/*
* Process each portion based on presence of =" and "<space>, "/>, or ">
* See if there are any more attributes to process
*/
while (preg_match('#<[^>]*?=\s*?(\"|\')#s', $remainder, $matches, PREG_OFFSET_CAPTURE))
{
// Get the portion before the attribute value
$quotePosition = $matches[0][1];
$nextBefore = $quotePosition + strlen($matches[0][0]);
/*
* Figure out if we have a single or double quote and look for the matching closing quote
* Closing quote should be "/>, ">, "<space>, or " at the end of the string
*/
$quote = substr($matches[0][0], -1);
$pregMatch = ($quote == '"') ? '#(\"\s*/\s*>|\"\s*>|\"\s+|\"$)#' : "#(\'\s*/\s*>|\'\s*>|\'\s+|\'$)#";
// Get the portion after attribute value
if (preg_match($pregMatch, substr($remainder, $nextBefore), $matches, PREG_OFFSET_CAPTURE))
{
// We have a closing quote
$nextAfter = $nextBefore + $matches[0][1];
}
else
{
// No closing quote
$nextAfter = strlen($remainder);
}
// Get the actual attribute value
$attributeValue = substr($remainder, $nextBefore, $nextAfter - $nextBefore);
// Escape bad chars
$attributeValue = str_replace($badChars, $escapedChars, $attributeValue);
$attributeValue = $this->_stripCSSExpressions($attributeValue);
$alreadyFiltered .= substr($remainder, 0, $nextBefore) . $attributeValue . $quote;
$remainder = substr($remainder, $nextAfter + 1);
}
// At this point, we just have to return the $alreadyFiltered and the $remainder
return $alreadyFiltered . $remainder;
}
/**
* Try to convert to plaintext
*
* @param string $source The source string.
*
* @return string Plaintext string
*
* @since 11.1
* @deprecated 4.0 Use JFilterInput::decode() instead
*/
protected function _decode($source)
{
return $this->decode($source);
}
/**
* Try to convert to plaintext
*
* @param string $source The source string.
*
* @return string Plaintext string
*
* @since 3.5
*/
protected function decode($source)
{
static $ttr;
if (!is_array($ttr))
{
// Entity decode
$trans_tbl = get_html_translation_table(HTML_ENTITIES, ENT_COMPAT, 'ISO-8859-1');
foreach ($trans_tbl as $k => $v)
{
$ttr[$v] = utf8_encode($k);
}
}
$source = strtr($source, $ttr);
// Convert decimal
$source = preg_replace_callback('/&#(\d+);/m', function($m)
{
return utf8_encode(chr($m[1]));
}, $source
);
// Convert hex
$source = preg_replace_callback('/&#x([a-f0-9]+);/mi', function($m)
{
return utf8_encode(chr('0x' . $m[1]));
}, $source
);
return $source;
}
/**
* Escape < > and " inside attribute values
*
* @param string $source The source string.
*
* @return string Filtered string
*
* @since 11.1
* @deprecated 4.0 Use JFilterInput::escapeAttributeValues() instead
*/
protected function _escapeAttributeValues($source)
{
return $this->escapeAttributeValues($source);
}
/**
* Remove CSS Expressions in the form of `<property>:expression(...)`
*
* @param string $source The source string.
*
* @return string Filtered string
*
* @since 11.1
* @deprecated 4.0 Use JFilterInput::stripCSSExpressions() instead
*/
protected function _stripCSSExpressions($source)
{
return $this->stripCSSExpressions($source);
}
/**
* Recursively strip Unicode Supplementary Characters from the source. Not: objects cannot be filtered.
*
* @param mixed $source The data to filter
*
* @return mixed The filtered result
*
* @since 3.5
*/
protected function stripUSC($source)
{
if (is_object($source))
{
return $source;
}
if (is_array($source))
{
$filteredArray = array();
foreach ($source as $k => $v)
{
$filteredArray[$k] = $this->stripUSC($v);
}
return $filteredArray;
}
return preg_replace('/[\xF0-\xF7].../s', "\xE2\xAF\x91", $source);
}
}
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