<?php
defined('TC_CMS') or exit('Access Denied');
/**
* TC_CMS
* =======================================================
* 版权所有 (C) 2010-2020 www.teamcen.com，并保留所有权利。
* 网站地址: http://www.teamcen.com
* Q Q: 9877633
* -------------------------------------------------------
*
* @author : milkcy <milkcy@foxmail.com>
* @version : v1.0
* =======================================================
*/
class safe {
const getfilter="'|(and|or)\\b.+?(>|<|=|in|like)|\\/\\*.+?\\*\\/|<\\s*script\\b|\\bEXEC\\b|UNION.+?SELECT|UPDATE.+?SET|INSERT\\s+INTO.+?VALUES|(SELECT|DELETE).+?FROM|(CREATE|ALTER|DROP|TRUNCATE)\\s+(TABLE|DATABASE)";
const postfilter="\\b(and|or)\\b.{1,6}?(=|>|<|\\bin\\b|\\blike\\b)|\\/\\*.+?\\*\\/|<\\s*script\\b|\\bEXEC\\b|UNION.+?SELECT|UPDATE.+?SET|INSERT\\s+INTO.+?VALUES|(SELECT|DELETE).+?FROM|(CREATE|ALTER|DROP|TRUNCATE)\\s+(TABLE|DATABASE)";
const cookiefilter="\\b(and|or)\\b.{1,6}?(=|>|<|\\bin\\b|\\blike\\b)|\\/\\*.+?\\*\\/|<\\s*script\\b|\\bEXEC\\b|UNION.+?SELECT|UPDATE.+?SET|INSERT\\s+INTO.+?VALUES|(SELECT|DELETE).+?FROM|(CREATE|ALTER|DROP|TRUNCATE)\\s+(TABLE|DATABASE)";
public function __construct() {
}
public function initLogHacker() {
foreach($_GET as $key=>$value){
$this->StopAttack($key,$value,self::getfilter);
$_GET[$key] = $this->safe_replace($value);
$_GET[$key] = $this->remove_xss($_GET[$key]);
}
foreach($_COOKIE as $key=>$value){
$this->StopAttack($key,$value,self::cookiefilter);
}
foreach($_POST as $key=>$value){
if (!is_array($value)) {
$_POST[$key] = $this->trim_script($value);
}
$this->StopAttack($key,$value,self::postfilter);
}
}
private function StopAttack($StrFiltKey,$StrFiltValue,$ArrFiltReq){
if(is_array($StrFiltValue)) {
$StrFiltValue=implode($StrFiltValue);
}
if (preg_match("/".$ArrFiltReq."/is",$StrFiltValue)==1){
$attackStr = "<br><br>SubmitIP:".$_SERVER["REMOTE_ADDR"]."<br>SubmitTime:".strftime("%Y-%m-%d %H:%M:%S")."<br>SubmitPage:".$_SERVER["PHP_SELF"]."<br>SubmitMethod:".$_SERVER["REQUEST_METHOD"]."<br>SubmitParams:".$StrFiltKey."<br>SubmitData:".$StrFiltValue;
exit("Illegal operation:" . $attackStr);
}
}
/**
* 安全过滤函数
*
* @param $string
* @return string
*/
private function safe_replace($string) {
$string = str_replace('%20', '', $string);
$string = str_replace('%27', '', $string);
$string = str_replace('%2527', '', $string);
$string = str_replace('*', '', $string);
$string = str_replace('"', '"', $string);
$string = str_replace("'", '', $string);
$string = str_replace('"', '', $string);
$string = str_replace(';', '', $string);
$string = str_replace('<', '<', $string);
$string = str_replace('>', '>', $string);
$string = str_replace("{", '', $string);
$string = str_replace('}', '', $string);
$string = str_replace('\\', '', $string);
$string = str_replace('or', '', $string);
$string = str_replace('insert', '', $string);
$string = str_replace('update', '', $string);
$string = str_replace('delete', '', $string);
$string = str_replace('and', '', $string);
$string = str_replace('union', '', $string);
$string = str_replace('load_file', '', $string);
$string = str_replace('outfil', '', $string);
$string = str_replace('TRUNCATE', '', $string);
return $string;
}
/**
* 转义 javascript 代码标记
*
* @param $str
* @return mixed
*/
private function trim_script($str) {
if (is_array($str)) {
foreach ($str as $key => $val) {
$str[$key] = trim_script($val);
}
} else {
$str = preg_replace('/\<([\/]?)script([^\>]*?)\>/si', '<\\1script\\2>', $str);
$str = preg_replace('/\<([\/]?)iframe([^\>]*?)\>/si', '<\\1iframe\\2>', $str);
$str = preg_replace('/\<([\/]?)frame([^\>]*?)\>/si', '<\\1frame\\2>', $str);
$str = preg_replace('/]]\>/si', ']] >', $str);
}
return $str;
}
/**
* 防止XSS攻击,用在表单textarea中内容过滤较多
*
* @param $str
* @return mixed
*/
private function remove_xss($val) {
$val = preg_replace('/([\x00-\x08,\x0b-\x0c,\x0e-\x19])/', '', $val);
$search = 'abcdefghijklmnopqrstuvwxyz';
$search .= 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
$search .= '1234567890!@#$%^&*()';
$search .= '~`";:?+/={}[]-_|\'\\';
for ($i = 0; $i < strlen($search); $i++) {
$val = preg_replace('/(&#[xX]0{0,8}' . dechex(ord($search[$i])) . ';?)/i', $search[$i], $val); // with a ;
$val = preg_replace('/(�{0,8}' . ord($search[$i]) . ';?)/', $search[$i], $val); // with a ;
}
$ra1 = array(
'javascript',
'vbscript',
'expression',
'applet',
'meta',
'xml',
'blink',
'link',
'style',
'script',
'embed',
'object',
'iframe',
'frame',
'frameset',
'ilayer',
'layer',
'bgsound',
'title',
'base'
);
$ra2 = array(
'onabort',
'onactivate',
'onafterprint',
'onafterupdate',
'onbeforeactivate',
'onbeforecopy',
'onbeforecut',
'onbeforedeactivate',
'onbeforeeditfocus',
'onbeforepaste',
'onbeforeprint',
'onbeforeunload',
'onbeforeupdate',
'onblur',
'onbounce',
'oncellchange',
'onchange',
'onclick',
'oncontextmenu',
'oncontrolselect',
'oncopy',
'oncut',
'ondataavailable',
'ondatasetchanged',
'ondatasetcomplete',
'ondblclick',
'ondeactivate',
'ondrag',
'ondragend',
'ondragenter',
'ondragleave',
'ondragover',
'ondragstart',
'ondrop',
'onerror',
'onerrorupdate',
'onfilterchange',
'onfinish',
'onfocus',
'onfocusin',
'onfocusout',
'onhelp',
'onkeydown',
'onkeypress',
'onkeyup',
'onlayoutcomplete',
'onload',
'onlosecapture',
'onmousedown',
'onmouseenter',
'onmouseleave',
'onmousemove',
'onmouseout',
'onmouseover',
'onmouseup',
'onmousewheel',
'onmove',
'onmoveend',
'onmovestart',
'onpaste',
'onpropertychange',
'onreadystatechange',
'onreset',
'onresize',
'onresizeend',
'onresizestart',
'onrowenter',
'onrowexit',
'onrowsdelete',
'onrowsinserted',
'onscroll',
'onselect',
'onselectionchange',
'onselectstart',
'onstart',
'onstop',
'onsubmit',
'onunload'
);
$ra = array_merge($ra1, $ra2);
$found = true; // keep replacing as long as the previous round replaced something
while ($found == true) {
$val_before = $val;
for ($i = 0; $i < sizeof($ra); $i++) {
$pattern = '/';
for ($j = 0; $j < strlen($ra[$i]); $j++) {
if ($j > 0) {
$pattern .= '(';
$pattern .= '(&#[xX]0{0,8}([9ab]);)';
$pattern .= '|';
$pattern .= '|(�{0,8}([9|10|13]);)';
$pattern .= ')*';
}
$pattern .= $ra[$i][$j];
}
$pattern .= '/i';
$replacement = substr($ra[$i], 0, 2) . '<x>' . substr($ra[$i], 2); // add in <> to nerf the tag
$val = preg_replace($pattern, $replacement, $val); // filter out the hex tags
if ($val_before == $val) {
// no replacements were made, so exit the loop
$found = false;
}
}
}
return $val;
}
}
?>Copy after login
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