diff options
Diffstat (limited to 'vendors/kses/oop/php4.class.kses.php')
| -rw-r--r-- | vendors/kses/oop/php4.class.kses.php | 1162 |
1 files changed, 0 insertions, 1162 deletions
diff --git a/vendors/kses/oop/php4.class.kses.php b/vendors/kses/oop/php4.class.kses.php deleted file mode 100644 index acb06cc59..000000000 --- a/vendors/kses/oop/php4.class.kses.php +++ /dev/null @@ -1,1162 +0,0 @@ -<?php
- /*
- * ==========================================================================================
- *
- * This program is free software and open source 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.,
- * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA or visit
- * http://www.gnu.org/licenses/gpl.html
- *
- * ==========================================================================================
- */
-
- /**
- * Class file for PHP4 OOP version of kses
- *
- * This is an updated version of kses to work with PHP4 that works under E_STRICT.
- *
- * This upgrade provides the following:
- * + Version number synced to procedural version number
- * + PHPdoc style documentation has been added to the class. See http://www.phpdoc.org/ for more info.
- * + Some methods are now deprecated due to nomenclature style change. See method documentation for specifics.
- * + Kses4 now works in E_STRICT
- * + Addition of methods AddProtocols(), filterKsestextHook(), RemoveProtocol() and RemoveProtocols()
- * + Deprecated _hook(), Protocols()
- * + Integrated code from kses 0.2.2 into class.
- * + Added methods DumpProtocols(), DumpMethods()
- *
- * @package kses
- * @subpackage kses4
- */
-
- if(substr(phpversion(), 0, 1) < 4)
- {
- die("Class kses requires PHP 4 or higher.");
- }
-
- /**
- * Only install KSES4 once
- */
- if(!defined('KSES_CLASS_PHP4'))
- {
- define('KSES_CLASS_PHP4', true);
-
- /**
- * Kses strips evil scripts!
- *
- * This class provides the capability for removing unwanted HTML/XHTML, attributes from
- * tags, and protocols contained in links. The net result is a much more powerful tool
- * than the PHP internal strip_tags()
- *
- * This is a fork of a slick piece of procedural code called 'kses' written by Ulf Harnhammar
- * The entire set of functions was wrapped in a PHP object with some internal modifications
- * by Richard Vasquez (http://www.chaos.org/) 7/25/2003
- *
- * This upgrade provides the following:
- * + Version number synced to procedural version number
- * + PHPdoc style documentation has been added to the class. See http://www.phpdoc.org/ for more info.
- * + Some methods are now deprecated due to nomenclature style change. See method documentation for specifics.
- * + Kses4 now works in E_STRICT
- * + Addition of methods AddProtocols(), filterKsestextHook(), RemoveProtocol(), RemoveProtocols() and SetProtocols()
- * + Deprecated _hook(), Protocols()
- * + Integrated code from kses 0.2.2 into class.
- *
- * @author Richard R. Vásquez, Jr. (Original procedural code by Ulf Härnhammar)
- * @link http://sourceforge.net/projects/kses/ Home Page for Kses
- * @link http://chaos.org/contact/ Contact page with current email address for Richard Vasquez
- * @copyright Richard R. Vásquez, Jr. 2003-2005
- * @version PHP4 OOP 0.2.2
- * @license http://www.gnu.org/licenses/gpl.html GNU Public License
- * @package kses
- */
- class kses4
- {
- /**#@+
- * @access private
- * @var array
- */
- var $allowed_protocols = array();
- var $allowed_html = array();
- /**#@-*/
-
- /**
- * Constructor for kses.
- *
- * This sets a default collection of protocols allowed in links, and creates an
- * empty set of allowed HTML tags.
- * @since PHP4 OOP 0.0.1
- */
- function kses4()
- {
- /**
- * You could add protocols such as ftp, new, gopher, mailto, irc, etc.
- *
- * The base values the original kses provided were:
- * 'http', 'https', 'ftp', 'news', 'nntp', 'telnet', 'gopher', 'mailto'
- */
- $this->allowed_protocols = array('http', 'ftp', 'mailto');
- $this->allowed_html = array();
- }
-
- /**
- * Basic task of kses - parses $string and strips it as required.
- *
- * This method strips all the disallowed (X)HTML tags, attributes
- * and protocols from the input $string.
- *
- * @access public
- * @param string $string String to be stripped of 'evil scripts'
- * @return string The stripped string
- * @since PHP4 OOP 0.2.1
- */
- function Parse($string = "")
- {
- if (get_magic_quotes_gpc())
- {
- $string = stripslashes($string);
- }
- $string = $this->_no_null($string);
- $string = $this->_js_entities($string);
- $string = $this->_normalize_entities($string);
- $string = $this->filterKsesTextHook($string);
- return $this->_split($string);
- }
-
- /**
- * Allows for single/batch addition of protocols
- *
- * This method accepts one argument that can be either a string
- * or an array of strings. Invalid data will be ignored.
- *
- * The argument will be processed, and each string will be added
- * via AddProtocol().
- *
- * @access public
- * @param mixed , A string or array of protocols that will be added to the internal list of allowed protocols.
- * @return bool Status of adding valid protocols.
- * @see AddProtocol()
- * @since PHP4 OOP 0.2.1
- */
- function AddProtocols()
- {
- $c_args = func_num_args();
- if($c_args != 1)
- {
- trigger_error("kses4::AddProtocols() did not receive an argument.", E_USER_WARNING);
- return false;
- }
-
- $protocol_data = func_get_arg(0);
-
- if(is_array($protocol_data) && count($protocol_data) > 0)
- {
- foreach($protocol_data as $protocol)
- {
- $this->AddProtocol($protocol);
- }
- return true;
- }
- elseif(is_string($protocol_data))
- {
- $this->AddProtocol($protocol_data);
- return true;
- }
- else
- {
- trigger_error("kses4::AddProtocols() did not receive a string or an array.", E_USER_WARNING);
- return false;
- }
- }
-
- /**
- * Allows for single/batch addition of protocols
- *
- * @deprecated Use AddProtocols()
- * @see AddProtocols()
- * @return bool
- * @since PHP4 OOP 0.0.1
- */
- function Protocols()
- {
- $c_args = func_num_args();
- if($c_args != 1)
- {
- trigger_error("kses4::Protocols() did not receive an argument.", E_USER_WARNING);
- return false;
- }
-
- return $this->AddProtocols(func_get_arg(0));
- }
-
- /**
- * Adds a single protocol to $this->allowed_protocols.
- *
- * This method accepts a string argument and adds it to
- * the list of allowed protocols to keep when performing
- * Parse().
- *
- * @access public
- * @param string $protocol The name of the protocol to be added.
- * @return bool Status of adding valid protocol.
- * @since PHP4 OOP 0.0.1
- */
- function AddProtocol($protocol = "")
- {
- if(!is_string($protocol))
- {
- trigger_error("kses4::AddProtocol() requires a string.", E_USER_WARNING);
- return false;
- }
-
- $protocol = strtolower(trim($protocol));
- if($protocol == "")
- {
- trigger_error("kses4::AddProtocol() tried to add an empty/NULL protocol.", E_USER_WARNING);
- return false;
- }
-
- // Remove any inadvertent ':' at the end of the protocol.
- if(substr($protocol, strlen($protocol) - 1, 1) == ":")
- {
- $protocol = substr($protocol, 0, strlen($protocol) - 1);
- }
-
- if(!in_array($protocol, $this->allowed_protocols))
- {
- array_push($this->allowed_protocols, $protocol);
- sort($this->allowed_protocols);
- }
- return true;
- }
-
- /**
- * Allows for single/batch replacement of protocols
- *
- * This method accepts one argument that can be either a string
- * or an array of strings. Invalid data will be ignored.
- *
- * Existing protocols will be removed, then the argument will be
- * processed, and each string will be added via AddProtocol().
- *
- * @access public
- * @param mixed , A string or array of protocols that will be the new internal list of allowed protocols.
- * @return bool Status of replacing valid protocols.
- * @since PHP4 OOP 0.2.2
- * @see AddProtocol()
- */
- function SetProtocols()
- {
- $c_args = func_num_args();
- if($c_args != 1)
- {
- trigger_error("kses4::SetProtocols() did not receive an argument.", E_USER_WARNING);
- return false;
- }
-
- $protocol_data = func_get_arg(0);
-
- if(is_array($protocol_data) && count($protocol_data) > 0)
- {
- $this->allowed_protocols = array();
- foreach($protocol_data as $protocol)
- {
- $this->AddProtocol($protocol);
- }
- return true;
- }
- elseif(is_string($protocol_data))
- {
- $this->allowed_protocols = array();
- $this->AddProtocol($protocol_data);
- return true;
- }
- else
- {
- trigger_error("kses4::SetProtocols() did not receive a string or an array.", E_USER_WARNING);
- return false;
- }
- }
-
- /**
- * Raw dump of allowed protocols
- *
- * This returns an indexed array of allowed protocols for a particular KSES
- * instantiation.
- *
- * @access public
- * @return array The list of allowed protocols.
- * @since PHP4 OOP 0.2.2
- */
- function DumpProtocols()
- {
- return $this->allowed_protocols;
- }
-
- /**
- * Raw dump of allowed (X)HTML elements
- *
- * This returns an indexed array of allowed (X)HTML elements and attributes
- * for a particular KSES instantiation.
- *
- * @access public
- * @return array The list of allowed elements.
- * @since PHP4 OOP 0.2.2
- */
- function DumpElements()
- {
- return $this->allowed_html;
- }
-
- /**
- * Adds valid (X)HTML with corresponding attributes that will be kept when stripping 'evil scripts'.
- *
- * This method accepts one argument that can be either a string
- * or an array of strings. Invalid data will be ignored.
- *
- * @access public
- * @param string $tag (X)HTML tag that will be allowed after stripping text.
- * @param array $attribs Associative array of allowed attributes - key => attribute name - value => attribute parameter
- * @return bool Status of Adding (X)HTML and attributes.
- * @since PHP4 OOP 0.0.1
- */
- function AddHTML($tag = "", $attribs = array())
- {
- if(!is_string($tag))
- {
- trigger_error("kses4::AddHTML() requires the tag to be a string", E_USER_WARNING);
- return false;
- }
-
- $tag = strtolower(trim($tag));
- if($tag == "")
- {
- trigger_error("kses4::AddHTML() tried to add an empty/NULL tag", E_USER_WARNING);
- return false;
- }
-
- if(!is_array($attribs))
- {
- trigger_error("kses4::AddHTML() requires an array (even an empty one) of attributes for '$tag'", E_USER_WARNING);
- return false;
- }
-
- $new_attribs = array();
- if(is_array($attribs) && count($attribs) > 0)
- {
- foreach($attribs as $idx1 => $val1)
- {
- $new_idx1 = strtolower($idx1);
- $new_val1 = $attribs[$idx1];
-
- if(is_array($new_val1) && count($new_val1) > 0)
- {
- $tmp_val = array();
- foreach($new_val1 as $idx2 => $val2)
- {
- $new_idx2 = strtolower($idx2);
- $tmp_val[$new_idx2] = $val2;
- }
- $new_val1 = $tmp_val;
- }
-
- $new_attribs[$new_idx1] = $new_val1;
- }
- }
-
- $this->allowed_html[$tag] = $new_attribs;
- return true;
- }
-
- /**
- * Removes a single protocol from $this->allowed_protocols.
- *
- * This method accepts a string argument and removes it from
- * the list of allowed protocols to keep when performing
- * Parse().
- *
- * @access public
- * @param string $protocol The name of the protocol to be removed.
- * @return bool Status of removing valid protocol.
- * @since PHP4 OOP 0.2.1
- */
- function RemoveProtocol($protocol = "")
- {
- if(!is_string($protocol))
- {
- trigger_error("kses4::RemoveProtocol() requires a string.", E_USER_WARNING);
- return false;
- }
-
- // Remove any inadvertent ':' at the end of the protocol.
- if(substr($protocol, strlen($protocol) - 1, 1) == ":")
- {
- $protocol = substr($protocol, 0, strlen($protocol) - 1);
- }
-
- $protocol = strtolower(trim($protocol));
- if($protocol == "")
- {
- trigger_error("kses4::RemoveProtocol() tried to remove an empty/NULL protocol.", E_USER_WARNING);
- return false;
- }
-
- // Ensures that the protocol exists before removing it.
- if(in_array($protocol, $this->allowed_protocols))
- {
- $this->allowed_protocols = array_diff($this->allowed_protocols, array($protocol));
- sort($this->allowed_protocols);
- }
-
- return true;
- }
-
- /**
- * Allows for single/batch removal of protocols
- *
- * This method accepts one argument that can be either a string
- * or an array of strings. Invalid data will be ignored.
- *
- * The argument will be processed, and each string will be removed
- * via RemoveProtocol().
- *
- * @access public
- * @param mixed , A string or array of protocols that will be removed from the internal list of allowed protocols.
- * @return bool Status of removing valid protocols.
- * @see RemoveProtocol()
- * @since PHP5 OOP 0.2.1
- */
- function RemoveProtocols()
- {
- $c_args = func_num_args();
- if($c_args != 1)
- {
- return false;
- }
-
- $protocol_data = func_get_arg(0);
-
- if(is_array($protocol_data) && count($protocol_data) > 0)
- {
- foreach($protocol_data as $protocol)
- {
- $this->RemoveProtocol($protocol);
- }
- }
- elseif(is_string($protocol_data))
- {
- $this->RemoveProtocol($protocol_data);
- return true;
- }
- else
- {
- trigger_error("kses4::RemoveProtocols() did not receive a string or an array.", E_USER_WARNING);
- return false;
- }
- }
-
- /**
- * This method removes any NULL or characters in $string.
- *
- * @access private
- * @param string $string
- * @return string String without any NULL/chr(173)
- * @since PHP4 OOP 0.0.1
- */
- function _no_null($string)
- {
- $string = preg_replace('/\0+/', '', $string);
- $string = preg_replace('/(\\\\0)+/', '', $string);
- return $string;
- }
-
- /**
- * This function removes the HTML JavaScript entities found in early versions of
- * Netscape 4.
- *
- * @access private
- * @param string $string
- * @return string String without any NULL/chr(173)
- * @since PHP4 OOP 0.0.1
- */
- function _js_entities($string)
- {
- return preg_replace('%&\s*\{[^}]*(\}\s*;?|$)%', '', $string);
- }
-
- /**
- * Normalizes HTML entities
- *
- * This function normalizes HTML entities. It will convert "AT&T" to the correct
- * "AT&T", ":" to ":", "&#XYZZY;" to "&#XYZZY;" and so on.
- *
- * @access private
- * @param string $string
- * @return string String with normalized entities
- * @since PHP4 OOP 0.0.1
- */
- function _normalize_entities($string)
- {
- # Disarm all entities by converting & to &
- $string = str_replace('&', '&', $string);
-
- # Change back the allowed entities in our entity white list
-
- $string = preg_replace('/&([A-Za-z][A-Za-z0-9]{0,19});/', '&\\1;', $string);
- $string = preg_replace('/&#0*([0-9]{1,5});/e', '\$this->_normalize_entities2("\\1")', $string);
- $string = preg_replace('/&#([Xx])0*(([0-9A-Fa-f]{2}){1,2});/', '&#\\1\\2;', $string);
-
- return $string;
- }
-
- /**
- * Helper method used by normalizeEntites()
- *
- * This method helps normalizeEntities() to only accept 16 bit values
- * and nothing more for &#number; entities.
- *
- * This method helps normalize_entities() during a preg_replace()
- * where a &#(0)*XXXXX; occurs. The '(0)*XXXXXX' value is converted to
- * a number and the result is returned as a numeric entity if the number
- * is less than 65536. Otherwise, the value is returned 'as is'.
- *
- * @access private
- * @param string $i
- * @return string Normalized numeric entity
- * @see _normalize_entities()
- * @since PHP4 OOP 0.0.1
- */
- function _normalize_entities2($i)
- {
- return (($i > 65535) ? "&#$i;" : "&#$i;");
- }
-
- /**
- * Allows for additional user defined modifications to text.
- *
- * @deprecated use filterKsesTextHook()
- * @param string $string
- * @see filterKsesTextHook()
- * @return string
- * @since PHP4 OOP 0.0.1
- */
- function _hook($string)
- {
- return $this->filterKsesTextHook($string);
- }
-
- /**
- * Allows for additional user defined modifications to text.
- *
- * This method allows for additional modifications to be performed on
- * a string that's being run through Parse(). Currently, it returns the
- * input string 'as is'.
- *
- * This method is provided for users to extend the kses class for their own
- * requirements.
- *
- * @access public
- * @param string $string String to perfrom additional modifications on.
- * @return string User modified string.
- * @see Parse()
- * @since PHP5 OOP 1.0.0
- */
- function filterKsesTextHook($string)
- {
- return $string;
- }
-
- /**
- * This method goes through an array, and changes the keys to all lower case.
- *
- * @access private
- * @param array $in_array Associative array
- * @return array Modified array
- * @since PHP4 OOP 0.0.1
- */
- function _array_lc($inarray)
- {
- $outarray = array();
-
- if(is_array($inarray) && count($inarray) > 0)
- {
- foreach ($inarray as $inkey => $inval)
- {
- $outkey = strtolower($inkey);
- $outarray[$outkey] = array();
-
- if(is_array($inval) && count($inval) > 0)
- {
- foreach ($inval as $inkey2 => $inval2)
- {
- $outkey2 = strtolower($inkey2);
- $outarray[$outkey][$outkey2] = $inval2;
- }
- }
- }
- }
-
- return $outarray;
- }
-
- /**
- * This method searched for HTML tags, no matter how malformed. It also
- * matches stray ">" characters.
- *
- * @access private
- * @param string $string
- * @return string HTML tags
- * @since PHP4 OOP 0.0.1
- */
- function _split($string)
- {
- return preg_replace(
- '%(<'. # EITHER: <
- '[^>]*'. # things that aren't >
- '(>|$)'. # > or end of string
- '|>)%e', # OR: just a >
- "\$this->_split2('\\1')",
- $string);
- }
-
- /**
- * This method strips out disallowed and/or mangled (X)HTML tags along with assigned attributes.
- *
- * This method does a lot of work. It rejects some very malformed things
- * like <:::>. It returns an empty string if the element isn't allowed (look
- * ma, no strip_tags()!). Otherwise it splits the tag into an element and an
- * allowed attribute list.
- *
- * @access private
- * @param string $string
- * @return string Modified string minus disallowed/mangled (X)HTML and attributes
- * @since PHP4 OOP 0.0.1
- */
- function _split2($string)
- {
- $string = $this->_stripslashes($string);
-
- if (substr($string, 0, 1) != '<')
- {
- # It matched a ">" character
- return '>';
- }
-
- if (!preg_match('%^<\s*(/\s*)?([a-zA-Z0-9]+)([^>]*)>?$%', $string, $matches))
- {
- # It's seriously malformed
- return '';
- }
-
- $slash = trim($matches[1]);
- $elem = $matches[2];
- $attrlist = $matches[3];
-
- if (
- !isset($this->allowed_html[strtolower($elem)]) ||
- !is_array($this->allowed_html[strtolower($elem)])
- )
- {
- # They are using a not allowed HTML element
- return '';
- }
-
- if ($slash != '')
- {
- return "<$slash$elem>";
- }
- # No attributes are allowed for closing elements
-
- return $this->_attr("$slash$elem", $attrlist);
- }
-
- /**
- * This method strips out disallowed attributes for (X)HTML tags.
- *
- * This method removes all attributes if none are allowed for this element.
- * If some are allowed it calls $this->_hair() to split them further, and then it
- * builds up new HTML code from the data that $this->_hair() returns. It also
- * removes "<" and ">" characters, if there are any left. One more thing it
- * does is to check if the tag has a closing XHTML slash, and if it does,
- * it puts one in the returned code as well.
- *
- * @access private
- * @param string $element (X)HTML tag to check
- * @param string $attr Text containing attributes to check for validity.
- * @return string Resulting valid (X)HTML or ''
- * @see _hair()
- * @since PHP4 OOP 0.0.1
- */
- function _attr($element, $attr)
- {
- # Is there a closing XHTML slash at the end of the attributes?
- $xhtml_slash = '';
- if (preg_match('%\s/\s*$%', $attr))
- {
- $xhtml_slash = ' /';
- }
-
- # Are any attributes allowed at all for this element?
- if (
- !isset($this->allowed_html[strtolower($element)]) ||
- count($this->allowed_html[strtolower($element)]) == 0
- )
- {
- return "<$element$xhtml_slash>";
- }
-
- # Split it
- $attrarr = $this->_hair($attr);
-
- # Go through $attrarr, and save the allowed attributes for this element
- # in $attr2
- $attr2 = '';
- if(is_array($attrarr) && count($attrarr) > 0)
- {
- foreach ($attrarr as $arreach)
- {
- if(!isset($this->allowed_html[strtolower($element)][strtolower($arreach['name'])]))
- {
- continue;
- }
-
- $current = $this->allowed_html[strtolower($element)][strtolower($arreach['name'])];
- if ($current == '')
- {
- # the attribute is not allowed
- continue;
- }
-
- if (!is_array($current))
- {
- # there are no checks
- $attr2 .= ' '.$arreach['whole'];
- }
- else
- {
- # there are some checks
- $ok = true;
- if(is_array($current) && count($current) > 0)
- {
- foreach ($current as $currkey => $currval)
- {
- if (!$this->_check_attr_val($arreach['value'], $arreach['vless'], $currkey, $currval))
- {
- $ok = false;
- break;
- }
- }
-
- if ($ok)
- {
- # it passed them
- $attr2 .= ' '.$arreach['whole'];
- }
- }
- }
- }
- }
-
- # Remove any "<" or ">" characters
- $attr2 = preg_replace('/[<>]/', '', $attr2);
- return "<$element$attr2$xhtml_slash>";
- }
-
- /**
- * This method combs through an attribute list string and returns an associative array of attributes and values.
- *
- * This method does a lot of work. It parses an attribute list into an array
- * with attribute data, and tries to do the right thing even if it gets weird
- * input. It will add quotes around attribute values that don't have any quotes
- * or apostrophes around them, to make it easier to produce HTML code that will
- * conform to W3C's HTML specification. It will also remove bad URL protocols
- * from attribute values.
- *
- * @access private
- * @param string $attr Text containing tag attributes for parsing
- * @return array Associative array containing data on attribute and value
- * @since PHP4 OOP 0.0.1
- */
- function _hair($attr)
- {
- $attrarr = array();
- $mode = 0;
- $attrname = '';
-
- # Loop through the whole attribute list
-
- while (strlen($attr) != 0)
- {
- # Was the last operation successful?
- $working = 0;
-
- switch ($mode)
- {
- case 0: # attribute name, href for instance
- if (preg_match('/^([-a-zA-Z]+)/', $attr, $match))
- {
- $attrname = $match[1];
- $working = $mode = 1;
- $attr = preg_replace('/^[-a-zA-Z]+/', '', $attr);
- }
- break;
- case 1: # equals sign or valueless ("selected")
- if (preg_match('/^\s*=\s*/', $attr)) # equals sign
- {
- $working = 1;
- $mode = 2;
- $attr = preg_replace('/^\s*=\s*/', '', $attr);
- break;
- }
- if (preg_match('/^\s+/', $attr)) # valueless
- {
- $working = 1;
- $mode = 0;
- $attrarr[] = array(
- 'name' => $attrname,
- 'value' => '',
- 'whole' => $attrname,
- 'vless' => 'y'
- );
- $attr = preg_replace('/^\s+/', '', $attr);
- }
- break;
- case 2: # attribute value, a URL after href= for instance
- if (preg_match('/^"([^"]*)"(\s+|$)/', $attr, $match)) # "value"
- {
- $thisval = $this->_bad_protocol($match[1]);
- $attrarr[] = array(
- 'name' => $attrname,
- 'value' => $thisval,
- 'whole' => "$attrname=\"$thisval\"",
- 'vless' => 'n'
- );
- $working = 1;
- $mode = 0;
- $attr = preg_replace('/^"[^"]*"(\s+|$)/', '', $attr);
- break;
- }
- if (preg_match("/^'([^']*)'(\s+|$)/", $attr, $match)) # 'value'
- {
- $thisval = $this->_bad_protocol($match[1]);
- $attrarr[] = array(
- 'name' => $attrname,
- 'value' => $thisval,
- 'whole' => "$attrname='$thisval'",
- 'vless' => 'n'
- );
- $working = 1;
- $mode = 0;
- $attr = preg_replace("/^'[^']*'(\s+|$)/", '', $attr);
- break;
- }
- if (preg_match("%^([^\s\"']+)(\s+|$)%", $attr, $match)) # value
- {
- $thisval = $this->_bad_protocol($match[1]);
- $attrarr[] = array(
- 'name' => $attrname,
- 'value' => $thisval,
- 'whole' => "$attrname=\"$thisval\"",
- 'vless' => 'n'
- );
- # We add quotes to conform to W3C's HTML spec.
- $working = 1;
- $mode = 0;
- $attr = preg_replace("%^[^\s\"']+(\s+|$)%", '', $attr);
- }
- break;
- }
-
- if ($working == 0) # not well formed, remove and try again
- {
- $attr = $this->_html_error($attr);
- $mode = 0;
- }
- }
-
- # special case, for when the attribute list ends with a valueless
- # attribute like "selected"
- if ($mode == 1)
- {
- $attrarr[] = array(
- 'name' => $attrname,
- 'value' => '',
- 'whole' => $attrname,
- 'vless' => 'y'
- );
- }
-
- return $attrarr;
- }
-
- /**
- * This method removes disallowed protocols.
- *
- * This method removes all non-allowed protocols from the beginning of
- * $string. It ignores whitespace and the case of the letters, and it does
- * understand HTML entities. It does its work in a while loop, so it won't be
- * fooled by a string like "javascript:javascript:alert(57)".
- *
- * @access private
- * @param string $string String to check for protocols
- * @return string String with removed protocols
- * @since PHP4 OOP 0.0.1
- */
- function _bad_protocol($string)
- {
- $string = $this->_no_null($string);
- $string = preg_replace('/\xad+/', '', $string); # deals with Opera "feature"
- $string2 = $string.'a';
-
- while ($string != $string2)
- {
- $string2 = $string;
- $string = $this->_bad_protocol_once($string);
- } # while
-
- return $string;
- }
-
- /**
- * Helper method used by _bad_protocol()
- *
- * This function searches for URL protocols at the beginning of $string, while
- * handling whitespace and HTML entities.
- *
- * @access private
- * @param string $string String to check for protocols
- * @return string String with removed protocols
- * @see _bad_protocol()
- * @since PHP4 OOP 0.0.1
- */
- function _bad_protocol_once($string)
- {
- return preg_replace(
- '/^((&[^;]*;|[\sA-Za-z0-9])*)'.
- '(:|:|&#[Xx]3[Aa];)\s*/e',
- '\$this->_bad_protocol_once2("\\1")',
- $string
- );
- }
-
- /**
- * Helper method used by _bad_protocol_once() regex
- *
- * This function processes URL protocols, checks to see if they're in the white-
- * list or not, and returns different data depending on the answer.
- *
- * @access private
- * @param string $string String to check for protocols
- * @return string String with removed protocols
- * @see _bad_protocol()
- * @see _bad_protocol_once()
- * @since PHP4 OOP 0.0.1
- */
- function _bad_protocol_once2($string)
- {
- $string = $this->_decode_entities($string);
- $string = preg_replace('/\s/', '', $string);
- $string = $this->_no_null($string);
- $string = preg_replace('/\xad+/', '', $string); # deals with Opera "feature"
- $string = strtolower($string);
-
- $allowed = false;
- if(is_array($this->allowed_protocols) && count($this->allowed_protocols) > 0)
- {
- foreach ($this->allowed_protocols as $one_protocol)
- {
- if (strtolower($one_protocol) == $string)
- {
- $allowed = true;
- break;
- }
- }
- }
-
- if ($allowed)
- {
- return "$string:";
- }
- else
- {
- return '';
- }
- }
-
- /**
- * This function performs different checks for attribute values.
- *
- * The currently implemented checks are "maxlen", "minlen", "maxval",
- * "minval" and "valueless" with even more checks to come soon.
- *
- * @access private
- * @param string $value The value of the attribute to be checked.
- * @param string $vless Indicates whether the the value is supposed to be valueless
- * @param string $checkname The check to be performed
- * @param string $checkvalue The value that is to be checked against
- * @return bool Indicates whether the check passed or not
- * @since PHP4 OOP 0.0.1
- */
- function _check_attr_val($value, $vless, $checkname, $checkvalue)
- {
- $ok = true;
-
- switch (strtolower($checkname))
- {
- /**
- * The maxlen check makes sure that the attribute value has a length not
- * greater than the given value. This can be used to avoid Buffer Overflows
- * in WWW clients and various Internet servers.
- */
- case 'maxlen':
- if (strlen($value) > $checkvalue)
- {
- $ok = false;
- }
- break;
-
- /**
- * The minlen check makes sure that the attribute value has a length not
- * smaller than the given value.
- */
- case 'minlen':
- if (strlen($value) < $checkvalue)
- {
- $ok = false;
- }
- break;
-
- /**
- * The maxval check does two things: it checks that the attribute value is
- * an integer from 0 and up, without an excessive amount of zeroes or
- * whitespace (to avoid Buffer Overflows). It also checks that the attribute
- * value is not greater than the given value.
- * This check can be used to avoid Denial of Service attacks.
- */
- case 'maxval':
- if (!preg_match('/^\s{0,6}[0-9]{1,6}\s{0,6}$/', $value))
- {
- $ok = false;
- }
- if ($value > $checkvalue)
- {
- $ok = false;
- }
- break;
-
- /**
- * The minval check checks that the attribute value is a positive integer,
- * and that it is not smaller than the given value.
- */
- case 'minval':
- if (!preg_match('/^\s{0,6}[0-9]{1,6}\s{0,6}$/', $value))
- {
- $ok = false;
- }
- if ($value < $checkvalue)
- {
- $ok = false;
- }
- break;
-
- /**
- * The valueless check checks if the attribute has a value
- * (like <a href="blah">) or not (<option selected>). If the given value
- * is a "y" or a "Y", the attribute must not have a value.
- * If the given value is an "n" or an "N", the attribute must have one.
- */
- case 'valueless':
- if (strtolower($checkvalue) != $vless)
- {
- $ok = false;
- }
- break;
-
- }
-
- return $ok;
- }
-
- /**
- * Changes \" to "
- *
- * This function changes the character sequence \" to just "
- * It leaves all other slashes alone. It's really weird, but the quoting from
- * preg_replace(//e) seems to require this.
- *
- * @access private
- * @param string $string The string to be stripped.
- * @return string string stripped of \"
- * @since PHP4 OOP 0.0.1
- */
- function _stripslashes($string)
- {
- return preg_replace('%\\\\"%', '"', $string);
- }
-
- /**
- * helper method for _hair()
- *
- * This function deals with parsing errors in _hair(). The general plan is
- * to remove everything to and including some whitespace, but it deals with
- * quotes and apostrophes as well.
- *
- * @access private
- * @param string $string The string to be stripped.
- * @return string string stripped of whitespace
- * @see _hair()
- * @since PHP4 OOP 0.0.1
- */
- function _html_error($string)
- {
- return preg_replace('/^("[^"]*("|$)|\'[^\']*(\'|$)|\S)*\s*/', '', $string);
- }
-
- /**
- * Decodes numeric HTML entities
- *
- * This method decodes numeric HTML entities (A and A). It doesn't
- * do anything with other entities like ä, but we don't need them in the
- * URL protocol white listing system anyway.
- *
- * @access private
- * @param string $value The entitiy to be decoded.
- * @return string Decoded entity
- * @since PHP4 OOP 0.0.1
- */
- function _decode_entities($string)
- {
- $string = preg_replace('/&#([0-9]+);/e', 'chr("\\1")', $string);
- $string = preg_replace('/&#[Xx]([0-9A-Fa-f]+);/e', 'chr(hexdec("\\1"))', $string);
- return $string;
- }
-
- /**
- * Returns PHP4 OOP version # of kses.
- *
- * Since this class has been refactored and documented and proven to work,
- * I'm syncing the version number to procedural kses.
- *
- * @access public
- * @return string Version number
- * @since PHP4 OOP 0.0.1
- */
- function _version()
- {
- return 'PHP4 0.2.2 (OOP fork of procedural kses 0.2.2)';
- }
- }
-
-
-
- }
-?>
\ No newline at end of file |