96 lines
5.2 KiB
PHP
96 lines
5.2 KiB
PHP
<?php
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if(!defined('IN_OAOOA')) {
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exit('Access Denied');
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}
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class helper_security {
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public function removeXSS($val) {
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$val = preg_replace('/([\x00-\x08][\x0b-\x0c][\x0e-\x20])/', '', $val);
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$search = 'abcdefghijklmnopqrstuvwxyz';
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$search.= 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
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$search.= '1234567890!@#$%^&*()';
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$search.= '~`";:?+/={}[]-_|\'\\';
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for ($i = 0; $i < strlen($search); $i++) {
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$val = preg_replace('/(&#[x|X]0{0,8}'.dechex(ord($search[$i])).';?)/i', $search[$i], $val);
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$val = preg_replace('/(�{0,8}'.ord($search[$i]).';?)/', $search[$i], $val);
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}
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$ra1 = array('javascript', 'vbscript', 'expression', 'applet', 'meta', 'xml', 'blink', 'link', 'style', 'script', 'embed', 'object', 'iframe', 'frame', 'frameset', 'ilayer', 'layer', 'bgsound', 'title', 'base');
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$ra2 = array('onabort', 'onactivate', 'onafterprint', 'onafterupdate', 'onbeforeactivate', 'onbeforecopy', 'onbeforecut', 'onbeforedeactivate', 'onbeforeeditfocus', 'onbeforepaste', 'onbeforeprint', 'onbeforeunload', 'onbeforeupdate', 'onblur', 'onbounce', 'oncellchange', 'onchange', 'onclick', 'oncontextmenu', 'oncontrolselect', 'oncopy', 'oncut', 'ondataavailable', 'ondatasetchanged', 'ondatasetcomplete', 'ondblclick', 'ondeactivate', 'ondrag', 'ondragend', 'ondragenter', 'ondragleave', 'ondragover', 'ondragstart', 'ondrop', 'onerror', 'onerrorupdate', 'onfilterchange', 'onfinish', 'onfocus', 'onfocusin', 'onfocusout', 'onhelp', 'onkeydown', 'onkeypress', 'onkeyup', 'onlayoutcomplete', 'onload', 'onlosecapture', 'onmousedown', 'onmouseenter', 'onmouseleave', 'onmousemove', 'onmouseout', 'onmouseover', 'onmouseup', 'onmousewheel', 'onmove', 'onmoveend', 'onmovestart', 'onpaste', 'onpropertychange', 'onreadystatechange', 'onreset', 'onresize', 'onresizeend', 'onresizestart', 'onrowenter', 'onrowexit', 'onrowsdelete', 'onrowsinserted', 'onscroll', 'onselect', 'onselectionchange', 'onselectstart', 'onstart', 'onstop', 'onsubmit', 'onunload');
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$ra = array_merge($ra1, $ra2);
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$found = true;
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while ($found == true) {
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$val_before = $val;
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for ($i = 0; $i < sizeof($ra); $i++) {
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$pattern = '/';
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for ($j = 0; $j < strlen($ra[$i]); $j++) {
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if ($j > 0) {
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$pattern .= '(';
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$pattern .= '(&#[x|X]0{0,8}([9][a][b]);?)?';
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$pattern .= '|(�{0,8}([9][10][13]);?)?';
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$pattern .= ')?';
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}
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$pattern .= $ra[$i][$j];
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}
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$pattern .= '/i';
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$replacement = substr($ra[$i], 0, 2).''.substr($ra[$i], 2);
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$val = preg_replace($pattern, $replacement, $val);
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if ($val_before == $val) {
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$found = false;
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}
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}
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}
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return $val;
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}
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public function checkhtml($html) {
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preg_match_all("/\<([^\<]+)\>/is", $html, $ms);
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$searchs[] = '<';
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$replaces[] = '<';
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$searchs[] = '>';
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$replaces[] = '>';
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if($ms[1]) {
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$allowtags = 'img|a|font|div|table|tbody|caption|tr|td|th|br|p|b|strong|i|u|em|span|ol|ul|li|blockquote|pre|hr|embed|h1|h2|h3|h4|h5|h6';
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$ms[1] = array_unique($ms[1]);
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foreach ($ms[1] as $value) {
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$searchs[] = "<".$value.">";
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$value = str_replace('&', '_uch_tmp_str_', $value);
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$value = dhtmlspecialchars($value);
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$value = str_replace('_uch_tmp_str_', '&', $value);
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$value = str_replace(array('\\','/*'), array('.','/.'), $value);
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$skipkeys = array('onabort','onactivate','onafterprint','onafterupdate','onbeforeactivate','onbeforecopy','onbeforecut','onbeforedeactivate',
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'onbeforeeditfocus','onbeforepaste','onbeforeprint','onbeforeunload','onbeforeupdate','onblur','onbounce','oncellchange','onchange',
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'onclick','oncontextmenu','oncontrolselect','oncopy','oncut','ondataavailable','ondatasetchanged','ondatasetcomplete','ondblclick',
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'ondeactivate','ondrag','ondragend','ondragenter','ondragleave','ondragover','ondragstart','ondrop','onerror','onerrorupdate',
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'onfilterchange','onfinish','onfocus','onfocusin','onfocusout','onhelp','onkeydown','onkeypress','onkeyup','onlayoutcomplete',
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'onload','onlosecapture','onmousedown','onmouseenter','onmouseleave','onmousemove','onmouseout','onmouseover','onmouseup','onmousewheel',
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'onmove','onmoveend','onmovestart','onpaste','onpropertychange','onreadystatechange','onreset','onresize','onresizeend','onresizestart',
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'onrowenter','onrowexit','onrowsdelete','onrowsinserted','onscroll','onselect','onselectionchange','onselectstart','onstart','onstop',
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'onsubmit','onunload','javascript:;','javascript','script','eval','behaviour','expression');
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$skipstr = implode('|', $skipkeys);
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$value = preg_replace(array("/($skipstr)/i"), '.', $value);
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if(!preg_match("/^[\/|\s]?($allowtags)(\s+|$)/is", $value) && !preg_match("/^(br|hr)?(\s+|\/|$)/is", $value)) {
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$value = '';
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}
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$replaces[] = empty($value)?'':"<".str_replace('"', '"', $value).">";
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}
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}
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$html = str_replace($searchs, $replaces, $html);
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return getstr($html, 0, 0, 0, 0, 1);
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}
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/*public function htmlpurifier($html){
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require_once DZZ_ROOT.'./core/class/htmlpurifier/HTMLPurifier.auto.php';
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$config = HTMLPurifier_Config::createDefault();
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$purifier = new HTMLPurifier($config);
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return $purifier->purify($html);
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}*/
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}
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?>
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