mirror of
https://github.com/ezyang/htmlpurifier.git
synced 2024-12-23 08:51:53 +00:00
100 lines
3.2 KiB
PHP
100 lines
3.2 KiB
PHP
<?php
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require_once('common.php');
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function formatCode($string) {
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return
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str_replace(
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array("\t", '»', '\0(null)'),
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array('<strong>\t</strong>', '<span class="linebreak">»</span>', '<strong>\0</strong>'),
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escapeHTML(
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str_replace("\0", '\0(null)',
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wordwrap($string, 28, " »\n", true)
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)
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)
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);
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}
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?><!DOCTYPE html
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
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"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html>
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<head>
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<title>HTML Purifier XSS Attacks Smoketest</title>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
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<style type="text/css">
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.scroll {overflow:auto; width:100%;}
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.even {background:#EAEAEA;}
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thead th {border-bottom:1px solid #000;}
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pre strong {color:#00C;}
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pre .linebreak {color:#AAA;font-weight:100;}
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</style>
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</head>
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<body>
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<h1>HTML Purifier XSS Attacks Smoketest</h1>
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<p>XSS attacks are from
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<a href="http://ha.ckers.org/xss.html">http://ha.ckers.org/xss.html</a>.</p>
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<p><strong>Caveats:</strong>
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<tt>Google.com</tt> has been programatically disallowed, but as you can
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see, there are ways of getting around that, so coverage in this area
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is not complete. Most XSS broadcasts its presence by spawning an alert dialogue.
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The displayed code is not strictly correct, as linebreaks have been forced for
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readability. Linewraps have been marked with <tt>»</tt>. Some tests are
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omitted for your convenience. Not all control characters are displayed.</p>
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<h2>Test</h2>
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<?php
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if (version_compare(PHP_VERSION, '5', '<')) exit('<p>Requires PHP 5.</p>');
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$xml = simplexml_load_file('xssAttacks.xml');
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// programatically disallow google.com for URI evasion tests
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// not complete
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$config = HTMLPurifier_Config::createDefault();
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$config->set('URI.HostBlacklist', array('google.com'));
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$purifier = new HTMLPurifier($config);
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?>
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<table cellspacing="0" cellpadding="2">
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<thead><tr><th>Name</th><th width="30%">Raw</th><th>Output</th><th>Render</th></tr></thead>
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<tbody>
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<?php
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$i = 0;
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foreach ($xml->attack as $attack) {
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$code = $attack->code;
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// custom code for null byte injection tests
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if (substr($code, 0, 7) == 'perl -e') {
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$code = substr($code, $i=strpos($code, '"')+1, strrpos($code, '"') - $i);
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$code = str_replace('\0', "\0", $code);
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}
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// disable vectors we cannot test in any meaningful way
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if ($code == 'See Below') continue; // event handlers, whitelist defeats
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if ($attack->name == 'OBJECT w/Flash 2') continue; // requires ActionScript
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if ($attack->name == 'IMG Embedded commands 2') continue; // is an HTTP response
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// custom code for US-ASCII, which couldn't be expressed in XML without encoding
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if ($attack->name == 'US-ASCII encoding') $code = urldecode($code);
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?>
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<tr<?php if ($i++ % 2) {echo ' class="even"';} ?>>
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<td><?php echo escapeHTML($attack->name); ?></td>
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<td><pre><?php echo formatCode($code); ?></pre></td>
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<?php $pure_html = $purifier->purify($code); ?>
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<td><pre><?php echo formatCode($pure_html); ?></pre></td>
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<td><div class="scroll"><?php echo $pure_html ?></div></td>
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</tr>
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<?php
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}
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?>
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</tbody>
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</table>
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</body>
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</html>
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<?php
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// vim: et sw=4 sts=4
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