爬虫逆向实战(32)-某号店登录(RSA、补环境、混淆)

一、数据接口分析

主页地址：某号店

1、抓包

通过抓包可以发现登录接口是/publicPassport/login.do

2、判断是否有加密参数

1. 请求参数是否加密？
   通过查看“载荷”模块可以发现，有三个加密参数：username、password、captchaToken
   
2. 请求头是否加密？
   无
3. 响应是否加密？
   无
4. cookie是否加密？
   无

二、加密位置定位

1、看启动器

查看启动器发现里面调用堆栈中有一个double_submit，点进去查看

可以看出此处是发送ajax请求的位置，并且三个加密参数都是在此处赋值

在此处打上断点，发现可以断住，所以此处就是加密位置。

三、扣js代码

username、password是使用的标准RSA加密算法，所以我们可以不用扣，直接使用标准算法即可。但是captchaToken是使用window.jab.getData()生成的，进去这个方法后，可以发现是在一个混淆的文件中，所以我们需要将文件进行解混淆，解混淆之后再使用本地替换，将这个js文件替换为解混淆的。扣代码的时候，发现需要扣的代码还是挺多的，所以我们可以将整个文件全扣，然后补环境即可。
JavaScript源码：

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}();const JSEncrypt = require('jsencrypt');
var jab = new JAB({bizId: 'PASSPORT_LOGIN',initCaptcha: true})
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}