https://wiki.eofnet.lt/w//index.php?action=history&feed=atom&title=Apsisaugojimas_nuo_xss 2026-04-15T06:49:03Z Šio puslapio versijų istorija projekte MediaWiki 1.35.1 https://wiki.eofnet.lt/w//index.php?title=Apsisaugojimas_nuo_xss&diff=7537&oldid=prev 2016-02-22T19:17:07Z

<p></p> <p><b>Naujas puslapis</b></p><div>== Apsisaugojimas php funkcija ==<br /> <br /> Funkcija kuri prafiltruoja kintamąjį (tekstą) nuo įvairių XSS pobūdžio atakų bei paslėpto javascript kodo.<br /> <br /> &lt;source lang=&quot;php&quot;&gt;<br /> function RemoveXSS($val) {<br /> $val = preg_replace('/([\x00-\x08][\x0b-\x0c][\x0e-\x20])/', '', $val); <br /> $search = 'abcdefghijklmnopqrstuvwxyz';<br /> $search .= 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';<br /> $search .= '1234567890!@#$%^&amp;*()';<br /> $search .= '~`&quot;;:?+/={}[]-_|\'\\';<br /> for ($i = 0; $i &lt; strlen($search); $i++) {<br /> $val = preg_replace('/(&amp;#[x|X]0{0,8}'.dechex(ord($search[$i])).';?)/i', $search[$i], $val);<br /> $val = preg_replace('/(&amp;#0{0,8}'.ord($search[$i]).';?)/', $search[$i], $val); <br /> }<br /> $ra1 = Array('javascript', 'vbscript', 'expression', 'applet', 'meta', 'xml', 'blink', 'link', 'style', 'script', 'embed', 'object', 'iframe', 'frame', 'frameset', 'ilayer', 'layer', 'bgsound', 'title', 'base');<br /> $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');<br /> $ra = array_merge($ra1, $ra2);<br /> $found = true;<br /> while ($found == true) {<br /> $val_before = $val;<br /> for ($i = 0; $i &lt; sizeof($ra); $i++) {<br /> $pattern = '/';<br /> for ($j = 0; $j &lt; strlen($ra[$i]); $j++) {<br /> if ($j &gt; 0) {<br /> $pattern .= '(';<br /> $pattern .= '(&amp;#[x|X]0{0,8}([9][a][b]);?)?';<br /> $pattern .= '|(&amp;#0{0,8}([9][10][13]);?)?';<br /> $pattern .= ')?';<br /> }<br /> $pattern .= $ra[$i][$j];<br /> }<br /> $pattern .= '/i';<br /> $replacement = substr($ra[$i], 0, 2).'&lt;x&gt;'.substr($ra[$i], 2);<br /> $val = preg_replace($pattern, $replacement, $val);<br /> if ($val_before == $val) {<br /> $found = false;<br /> }<br /> }<br /> }<br /> return $val;<br /> }<br /> &lt;/source&gt;<br /> <br /> [[Category:Programavimas]]</div>

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