前言
记录下如何破cookie逆向
目标
目标网址:https://q.10jqka.com.cn/
目标接口:http://q.10jqka.com.cn/index/index/board/all/field/zdf/order/desc/page/2/ajax/1/
对抗:cookie反爬虫处理,关键字v,如图
解决步骤
1、JS中关键字查找
如上,我们找到了关键字 v,那么接下来就用hook搜查
点击F12,打开 开发者工具,选择Console直接输入hook代码
(function () {Object.defineProperty(document, 'cookie', {set: function (val) {if (val.indexOf('v') != -1) {debugger;}console.log('Hook捕获到cookie设置->', val);return val;}});
})();# val.indexOf('v') 中输入你要的关键字,回车
# 注意需要等待一会,因为程序加载需要时间
# 回车后,程序执行到v处自动断点,并打印,可一步步向下看js推理
运行后如图,n产出刚好是v的数值
接着点击右上角的箭头,会一步步执行接下来的js
连续点一遍下来发现n值最后由 function D() 产出
全局搜索 function D(),最后输出在这,后面可以创建个空值去接收
2. JS调试技巧
从这里可以发现就是整个的文件只有千多行代码,可以采用全复制方式处理cookie
2.1、扣出所有代码,放入自建js文件中,我这例如: cookie.js
2.2、利用execjs执行
import execjswith open('qq.js', encoding='utf-8') as f:x = f.read()v = execjs.compile(x).call('get_cookie')
print(v)
这时会报错一堆错,而且还要挨个补环境,例如下:
execjs._exceptions.ProgramError: ReferenceError: document is not defined
execjs._exceptions.ProgramError: ReferenceError: window is not defined
execjs._exceptions.ProgramError: ReferenceError: navigator is not defined
这时可以使用 jsdom 这个技术,在 js 文件最上方加入运行js所缺补的环境,例如下(所有通用)
const jsdom = require("jsdom");
const { JSDOM } = jsdom;
const dom = new JSDOM(`<!DOCTYPE html><p>Hello world</p>`);window = dom.window
document = window.document
navigator = window.navigator
官方文档:https://github.com/jsdom/jsdom/wiki/jsdom
然后python代码需要调用其中的函数,获取到产出的v值
1、在 js上面创建 ==》 var _v = {};
2、在 function D() 后面加入.xialuo 接收 ==》 _v.xialuo = D, 如图
3、末尾创建个函数好被python调用
function getCookie() {return _v.xialuo()
}
最后,cookie.js 代码如下:
const jsdom = require("jsdom");
const { JSDOM } = jsdom;
const dom = new JSDOM(`<!DOCTYPE html><p>Hello world</p>`);
window=dom.window;
document=window.document;
navigator=window.navigator;var _v = {}var TOKEN_SERVER_TIME = 1656072000.984;
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