SRCMS·轻响应V1.6正式版
修复外部报告的多个严重安全缺陷
This commit is contained in:
Martin Zhou
187
Application/User/Controller/xsshtml.class.php
Normal file
187
Application/User/Controller/xsshtml.class.php
Normal file
@@ -0,0 +1,187 @@
|
||||
<?php
|
||||
/**
|
||||
* PHP 富文本XSS过滤类
|
||||
*
|
||||
* @package XssHtml
|
||||
* @version 1.0.0
|
||||
* @link http://phith0n.github.io/XssHtml
|
||||
* @since 20140621
|
||||
* @copyright (c) Phithon All Rights Reserved
|
||||
*
|
||||
*/
|
||||
|
||||
#
|
||||
# Written by Phithon <root@leavesongs.com> in 2014 and placed in
|
||||
# the public domain.
|
||||
#
|
||||
# phithon <root@leavesongs.com> 编写于20140621
|
||||
# From: XDSEC <www.xdsec.org> & 离别歌 <www.leavesongs.com>
|
||||
# Usage:
|
||||
# <?php
|
||||
# require('xsshtml.class.php');
|
||||
# $html = '<html code>';
|
||||
# $xss = new XssHtml($html);
|
||||
# $html = $xss->getHtml();
|
||||
# ?\>
|
||||
#
|
||||
# 需求：
|
||||
# PHP Version > 5.0
|
||||
# 浏览器版本：IE7+ 或其他浏览器，无法防御IE6及以下版本浏览器中的XSS
|
||||
# 更多使用选项见 http://phith0n.github.io/XssHtml
|
||||
|
||||
class XssHtml {
|
||||
private $m_dom;
|
||||
private $m_xss;
|
||||
private $m_ok;
|
||||
private $m_AllowAttr = array('title', 'src', 'href', 'id', 'class', 'style', 'width', 'height', 'alt', 'target', 'align');
|
||||
private $m_AllowTag = array('a', 'img', 'br', 'strong', 'b', 'code', 'pre', 'p', 'div', 'em', 'span', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'table', 'ul', 'ol', 'tr', 'th', 'td', 'hr', 'li', 'u');
|
||||
|
||||
/**
|
||||
* 构造函数
|
||||
*
|
||||
* @param string $html 待过滤的文本
|
||||
* @param string $charset 文本编码，默认utf-8
|
||||
* @param array $AllowTag 允许的标签，如果不清楚请保持默认，默认已涵盖大部分功能，不要增加危险标签
|
||||
*/
|
||||
public function __construct($html, $charset = 'utf-8', $AllowTag = array()){
|
||||
$this->m_AllowTag = empty($AllowTag) ? $this->m_AllowTag : $AllowTag;
|
||||
$this->m_xss = strip_tags($html, '<' . implode('><', $this->m_AllowTag) . '>');
|
||||
if (empty($this->m_xss)) {
|
||||
$this->m_ok = FALSE;
|
||||
return ;
|
||||
}
|
||||
$this->m_xss = "<meta http-equiv=\"Content-Type\" content=\"text/html;charset={$charset}\"><nouse>" . $this->m_xss . "</nouse>";
|
||||
$this->m_dom = new DOMDocument();
|
||||
$this->m_dom->strictErrorChecking = FALSE;
|
||||
$this->m_ok = @$this->m_dom->loadHTML($this->m_xss);
|
||||
}
|
||||
|
||||
/**
|
||||
* 获得过滤后的内容
|
||||
*/
|
||||
public function getHtml()
|
||||
{
|
||||
if (!$this->m_ok) {
|
||||
return '';
|
||||
}
|
||||
$nodeList = $this->m_dom->getElementsByTagName('*');
|
||||
for ($i = 0; $i < $nodeList->length; $i++){
|
||||
$node = $nodeList->item($i);
|
||||
if (in_array($node->nodeName, $this->m_AllowTag)) {
|
||||
if (method_exists($this, "__node_{$node->nodeName}")) {
|
||||
call_user_func(array($this, "__node_{$node->nodeName}"), $node);
|
||||
}else{
|
||||
call_user_func(array($this, '__node_default'), $node);
|
||||
}
|
||||
}
|
||||
}
|
||||
$html = strip_tags($this->m_dom->saveHTML(), '<' . implode('><', $this->m_AllowTag) . '>');
|
||||
$html = preg_replace('/^\n(.*)\n$/s', '$1', $html);
|
||||
return $html;
|
||||
}
|
||||
|
||||
private function __true_url($url){
|
||||
if (preg_match('#^https?://.+#is', $url)) {
|
||||
return $url;
|
||||
}else{
|
||||
return 'http://' . $url;
|
||||
}
|
||||
}
|
||||
|
||||
private function __get_style($node){
|
||||
if ($node->attributes->getNamedItem('style')) {
|
||||
$style = $node->attributes->getNamedItem('style')->nodeValue;
|
||||
$style = str_replace('\\', ' ', $style);
|
||||
$style = str_replace(array('&#', '/*', '*/'), ' ', $style);
|
||||
$style = preg_replace('#e.*x.*p.*r.*e.*s.*s.*i.*o.*n#Uis', ' ', $style);
|
||||
return $style;
|
||||
}else{
|
||||
return '';
|
||||
}
|
||||
}
|
||||
|
||||
private function __get_link($node, $att){
|
||||
$link = $node->attributes->getNamedItem($att);
|
||||
if ($link) {
|
||||
return $this->__true_url($link->nodeValue);
|
||||
}else{
|
||||
return '';
|
||||
}
|
||||
}
|
||||
|
||||
private function __setAttr($dom, $attr, $val){
|
||||
if (!empty($val)) {
|
||||
$dom->setAttribute($attr, $val);
|
||||
}
|
||||
}
|
||||
|
||||
private function __set_default_attr($node, $attr, $default = '')
|
||||
{
|
||||
$o = $node->attributes->getNamedItem($attr);
|
||||
if ($o) {
|
||||
$this->__setAttr($node, $attr, $o->nodeValue);
|
||||
}else{
|
||||
$this->__setAttr($node, $attr, $default);
|
||||
}
|
||||
}
|
||||
|
||||
private function __common_attr($node)
|
||||
{
|
||||
$list = array();
|
||||
foreach ($node->attributes as $attr) {
|
||||
if (!in_array($attr->nodeName,
|
||||
$this->m_AllowAttr)) {
|
||||
$list[] = $attr->nodeName;
|
||||
}
|
||||
}
|
||||
foreach ($list as $attr) {
|
||||
$node->removeAttribute($attr);
|
||||
}
|
||||
$style = $this->__get_style($node);
|
||||
$this->__setAttr($node, 'style', $style);
|
||||
$this->__set_default_attr($node, 'title');
|
||||
$this->__set_default_attr($node, 'id');
|
||||
$this->__set_default_attr($node, 'class');
|
||||
}
|
||||
|
||||
private function __node_img($node){
|
||||
$this->__common_attr($node);
|
||||
|
||||
$this->__set_default_attr($node, 'src');
|
||||
$this->__set_default_attr($node, 'width');
|
||||
$this->__set_default_attr($node, 'height');
|
||||
$this->__set_default_attr($node, 'alt');
|
||||
$this->__set_default_attr($node, 'align');
|
||||
|
||||
}
|
||||
|
||||
private function __node_a($node){
|
||||
$this->__common_attr($node);
|
||||
$href = $this->__get_link($node, 'href');
|
||||
|
||||
$this->__setAttr($node, 'href', $href);
|
||||
$this->__set_default_attr($node, 'target', '_blank');
|
||||
}
|
||||
|
||||
private function __node_embed($node){
|
||||
$this->__common_attr($node);
|
||||
$link = $this->__get_link($node, 'src');
|
||||
|
||||
$this->__setAttr($node, 'src', $link);
|
||||
$this->__setAttr($node, 'allowscriptaccess', 'never');
|
||||
$this->__set_default_attr($node, 'width');
|
||||
$this->__set_default_attr($node, 'height');
|
||||
}
|
||||
|
||||
private function __node_default($node){
|
||||
$this->__common_attr($node);
|
||||
}
|
||||
}
|
||||
|
||||
// if(php_sapi_name() == "cli"){
|
||||
// $html = $argv[1];
|
||||
// $xss = new XssHtml($html);
|
||||
// $html = $xss->getHtml();
|
||||
// echo "'$html'";
|
||||
// }
|
||||
?>
|
||||
Reference in New Issue
Block a user