# Source: session.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 basic session functions.
     * @namespace beef.session
     */
    beef.session = {

    	hook_session_id_length: 80,
    	hook_session_id_chars: "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789",
    	ec: new evercookie(),
        beefhook: "<%= @hook_session_name %>",

    	/**
    	 * Gets a string which will be used to identify the hooked browser session
    	 *
    	 * @example: var hook_session_id = beef.session.get_hook_session_id();
    	 */
      	get_hook_session_id: function() {
    		// check if the browser is already known to the framework
    		var id = this.ec.evercookie_cookie(beef.session.beefhook);
    		if (typeof id == 'undefined') {
    			var id = this.ec.evercookie_userdata(beef.session.beefhook);
    		}
    		if (typeof id == 'undefined') {
    			var id = this.ec.evercookie_window(beef.session.beefhook);
    		}

    		// if the browser is not known create a hook session id and set it
    		if ((typeof id == 'undefined') || (id == null)) {
    			id = this.gen_hook_session_id();
    			this.set_hook_session_id(id);
    		}

    		// return the hooked browser session identifier
    		return id;
    	},

    	/**
    	 * Sets a string which will be used to identify the hooked browser session
    	 *
    	 * @example: beef.session.set_hook_session_id('RANDOMSTRING');
    	 */
      	set_hook_session_id: function(id) {
    		// persist the hook session id
    		this.ec.evercookie_cookie(beef.session.beefhook, id);
    		this.ec.evercookie_userdata(beef.session.beefhook, id);
    		this.ec.evercookie_window(beef.session.beefhook, id);
    	},

    	/**
    	 * Generates a random string using the chars in hook_session_id_chars.
    	 *
    	 * @example: beef.session.gen_hook_session_id();
    	 */
      	gen_hook_session_id: function() {
    	    // init the return value
    		var hook_session_id = "";

    		// construct the random string
    		for(var i=0; i<this.hook_session_id_length; i++) {
    		  var rand_num = Math.floor(Math.random()*this.hook_session_id_chars.length);
    		  hook_session_id += this.hook_session_id_chars.charAt(rand_num);
    		}

    		return hook_session_id;
    	}
    };

    beef.regCmp('beef.session');