CDP协议在Web渗透测试中的深度应用与加解密技术<\/h1>

1. CDP协议基础与应用概述<\/h2>
Chrome DevTools Protocol (CDP)是Chrome浏览器提供的调试协议，允许开发者通过程序化的方式与浏览器交互，实现调试、监控和修改网页行为的功能。<\/p>

1.1 CDP协议核心特点<\/h3>

基于WebSocket通信<\/li>
提供完整的浏览器调试功能<\/li>
支持JavaScript执行环境控制<\/li>
能够拦截和修改网络请求<\/li>

支持DOM操作和事件模拟<\/li> <\/ul>

1.2 在渗透测试中的应用场景<\/h3>

Web应用加解密分析<\/li>
反爬机制绕过<\/li>
动态内容调试<\/li>
混淆代码解析<\/li>

自动化测试脚本开发<\/li> <\/ul>

2. Web渗透中的加解密技术<\/h2>

2.1 常见加解密场景<\/h3>

Web前端加密<\/strong>：HTML+JS实现的加密逻辑<\/li>
小程序加密<\/strong>：运行在微信环境中的加密机制<\/li>
APP加密<\/strong>：原生应用中的加密实现<\/li>

反爬机制<\/strong>：防止自动化请求的加密手段<\/li> <\/ol>
2.2 加解密分析技术演进<\/h3>

初期阶段<\/strong>：<\/p>

搜索关键词：encrypt、特殊请求头、json.stringify等<\/li>
使用断点调试分析<\/li>
结合mitmproxy和Burp Suite进行请求替换<\/li> <\/ul> <\/li>

进阶阶段<\/strong>：<\/p>

使用DevTools进行深度调试<\/li>
堆栈分析定位关键加密点<\/li>
条件断点技术应用<\/li> <\/ul> <\/li>

高级阶段<\/strong>：<\/p>

CDP协议自动化调试<\/li>
RPC技术应用<\/li>
V8引擎Hook技术<\/li> <\/ul> <\/li> <\/ol>
3. 小程序加解密分析技术<\/h2>
3.1 微信小程序调试工具<\/h3>

Wechat-open-devtools<\/strong>：通过Python脚本打开微信开发者工具
python main.py -all <\/span><\/span><\/code><\/pre><\/li> 使用前需退出微信并删除WeChatAppEx.exe<\/code>的RadiumWMPF<\/code>目录<\/li> <\/ul> 3.2 小程序调试技巧<\/h3> 堆栈分析法<\/strong>：<\/p> 从请求出发溯源到对应JS文件<\/li> 适用于混淆代码和高端产品(如瑞数)分析<\/li> <\/ul> <\/li> 条件断点技术<\/strong>：<\/p> 右键断点可编辑表达式<\/li> 可执行JS代码进行运行时修改<\/li> 应用场景：替换明文数据<\/li> 绕过never debugger<\/li> 动态修改函数行为<\/li> <\/ul> <\/li> <\/ul> <\/li> <\/ol> 4. APP加解密分析技术<\/h2> 4.1 RPC技术应用<\/h3> 基本原理<\/strong>：将加密前的数据转发至中转服务器，修改后返回源程序<\/li> 典型案例<\/strong>：支付宝mPaas框架Hook \/\/ 示例Frida Hook脚本 <\/span><\/span><\/span><\/span>Java<\/span>.perform<\/span>(function<\/span>() { <\/span><\/span> var<\/span> targetClass<\/span> =<\/span> "com.alipay.mobile.common.transport.http.HttpUrlHeader"<\/span>; <\/span><\/span> var<\/span> methodName<\/span> =<\/span> "getHeaders"<\/span>; <\/span><\/span> var<\/span> hookClass<\/span> =<\/span> Java<\/span>.use<\/span>(targetClass<\/span>); <\/span><\/span> hookClass<\/span>[methodName<\/span>].overload<\/span>().implementation<\/span> =<\/span> function<\/span>() { <\/span><\/span> var<\/span> result<\/span> =<\/span> this<\/span>[methodName<\/span>](); <\/span><\/span> send<\/span>(result<\/span>); \/\/ 发送到中转服务器 <\/span><\/span><\/span><\/span> return<\/span> modifyResult<\/span>(result<\/span>); \/\/ 返回修改后的结果 <\/span><\/span><\/span><\/span> }; <\/span><\/span>}); <\/span><\/span><\/code><\/pre><\/li> <\/ul> 4.2 V8引擎Hook技术<\/h3> 微信小程序基于V8引擎运行<\/li> V8-inspector注入<\/strong>：尝试恢复被阉割的调试功能<\/li> 关键函数<\/strong>：dispatchProtocolMessage<\/code> - CDP协议消息分发函数<\/li> <\/ul> 5. CDP协议在加解密中的实战应用<\/h2> 5.1 基本工作流程<\/h3> 启用CDP监听(cdp.js<\/code>)<\/li> Python启动调试Web并连接CDP<\/li> 定位加密位置并设置断点<\/li> 调用CDP注册接口<\/li> 调用加密\/解密接口<\/li> 通过中间代理完成数据填充<\/li> <\/ol> 5.2 高效脚本实现<\/h3> # CDP_test示例代码<\/span> <\/span><\/span>import<\/span> websockets <\/span><\/span>import<\/span> asyncio <\/span><\/span>import<\/span> json <\/span><\/span> <\/span><\/span>async<\/span> def<\/span> cdp_client<\/span>(): <\/span><\/span> async<\/span> with<\/span> websockets.<\/span>connect('ws:\/\/localhost:9222\/devtools\/page\/XXX'<\/span>) as<\/span> ws: <\/span><\/span> # 设置断点<\/span> <\/span><\/span> await<\/span> ws.<\/span>send(json.<\/span>dumps({ <\/span><\/span> "id"<\/span>: 1<\/span>, <\/span><\/span> "method"<\/span>: "Debugger.setBreakpointByUrl"<\/span>, <\/span><\/span> "params"<\/span>: { <\/span><\/span> "lineNumber"<\/span>: 123<\/span>, <\/span><\/span> "url"<\/span>: "https:\/\/target.com\/encrypt.js"<\/span> <\/span><\/span> } <\/span><\/span> })) <\/span><\/span> <\/span><\/span> # 执行加密函数<\/span> <\/span><\/span> await<\/span> ws.<\/span>send(json.<\/span>dumps({ <\/span><\/span> "id"<\/span>: 2<\/span>, <\/span><\/span> "method"<\/span>: "Runtime.evaluate"<\/span>, <\/span><\/span> "params"<\/span>: { <\/span><\/span> "expression"<\/span>: "window.encrypt('testdata')"<\/span>, <\/span><\/span> "returnByValue"<\/span>: True<\/span> <\/span><\/span> } <\/span><\/span> })) <\/span><\/span> <\/span><\/span> response =<\/span> await<\/span> ws.<\/span>recv() <\/span><\/span> print(json.<\/span>loads(response)) <\/span><\/span><\/code><\/pre>5.3 优势分析<\/h3> 高效性<\/strong>：熟练情况下10分钟内完成加解密分析<\/li> 准确性<\/strong>：直接调用原JS加密函数，避免逆向误差<\/li> 通用性<\/strong>：不依赖具体加密方式，适用于各种编码<\/li> 可扩展性<\/strong>：可结合AI快速编写中间代理脚本<\/li> <\/ol> 6. 高级应用：瑞数反爬解决方案<\/h2> 6.1 传统解决方案<\/h3> 补环境法<\/strong>：模拟浏览器环境获取cookie<\/li> 需要完整逆向JS逻辑<\/li> 工作量大且易受小更新影响<\/li> <\/ul> 6.2 CDP解决方案<\/h3> 通过CDP直接使用真实浏览器环境<\/li> 获取动态生成的cookie等认证信息<\/li> 实现自动化请求构造<\/li> <\/ol> async<\/span> def<\/span> bypass_rs<\/span>(): <\/span><\/span> async<\/span> with<\/span> websockets.<\/span>connect('ws:\/\/localhost:9222\/devtools\/page\/XXX'<\/span>) as<\/span> ws: <\/span><\/span> # 获取cookie<\/span> <\/span><\/span> await<\/span> ws.<\/span>send(json.<\/span>dumps({ <\/span><\/span> "id"<\/span>: 1<\/span>, <\/span><\/span> "method"<\/span>: "Network.getAllCookies"<\/span> <\/span><\/span> })) <\/span><\/span> cookies =<\/span> await<\/span> ws.<\/span>recv() <\/span><\/span> <\/span><\/span> # 执行生成动态参数的JS<\/span> <\/span><\/span> await<\/span> ws.<\/span>send(json.<\/span>dumps({ <\/span><\/span> "id"<\/span>: 2<\/span>, <\/span><\/span> "method"<\/span>: "Runtime.evaluate"<\/span>, <\/span><\/span> "params"<\/span>: { <\/span><\/span> "expression"<\/span>: "window.generateDynamicParam()"<\/span>, <\/span><\/span> "returnByValue"<\/span>: True<\/span> <\/span><\/span> } <\/span><\/span> })) <\/span><\/span> dynamic_param =<\/span> await<\/span> ws.<\/span>recv() <\/span><\/span> <\/span><\/span> return<\/span> construct_request(cookies, dynamic_param) <\/span><\/span><\/code><\/pre>7. 工具与资源<\/h2> 7.1 推荐工具<\/h3> WeChatOpenDevTools-Python<\/strong>：微信小程序调试工具 https:\/\/github.com\/JaveleyQAQ\/WeChatOpenDevTools-Python <\/code><\/pre> <\/li> Frida脚本<\/strong>：APP加解密Hook https:\/\/github.com\/F6JO\/mPaas-frida-hook <\/code><\/pre> <\/li> CDP_test<\/strong>：CDP协议加解密示例 https:\/\/github.com\/Nstkm001\/CDP_test <\/code><\/pre> <\/li> <\/ol> 7.2 学习资源<\/h3> V8调试原理： https:\/\/ivanfan.site\/2022\/07\/16\/v8\/v8-inspector%20%E8%B0%83%E8%AF%95\/ <\/code><\/pre> <\/li> 瑞数反爬分析： https:\/\/blog.csdn.net\/qq_40759445\/article\/details\/136503498 <\/code><\/pre> <\/li> <\/ol> 8. 总结与最佳实践<\/h2> 8.1 技术选型建议<\/h3> Web前端<\/strong>：优先使用CDP协议直接调试<\/li> 微信小程序<\/strong>：结合DevTools和条件断点<\/li> APP应用<\/strong>：使用Frida RPC技术<\/li> 复杂反爬<\/strong>：CDP+真实浏览器环境<\/li> <\/ol> 8.2 效率优化技巧<\/h3> 快速定位加密点：从网络请求反向追踪<\/li> 使用AI辅助编写中间代理脚本<\/li> 建立常用加解密模式库<\/li> 开发自动化测试工作流<\/li> <\/ol> 8.3 注意事项<\/h3> 微信版本更新可能导致工具失效<\/li> CDP协议需要浏览器支持远程调试<\/li> 部分环境可能存在法律合规风险<\/li> 复杂混淆代码需要结合多种技术分析<\/li> <\/ol>

CDP协议在Web渗透测试中的深度应用与加解密技术<\/h1>

1. CDP协议基础与应用概述<\/h2> Chrome DevTools Protocol (CDP)是Chrome浏览器提供的调试协议，允许开发者通过程序化的方式与浏览器交互，实现调试、监控和修改网页行为的功能。<\/p>

2. Web渗透中的加解密技术<\/h2>

3. 小程序加解密分析技术<\/h2>

4. APP加解密分析技术<\/h2>

5. CDP协议在加解密中的实战应用<\/h2>

6. 高级应用：瑞数反爬解决方案<\/h2>

7. 工具与资源<\/h2>

8. 总结与最佳实践<\/h2>

8.3 注意事项<\/h3> 微信版本更新可能导致工具失效<\/li> CDP协议需要浏览器支持远程调试<\/li> 部分环境可能存在法律合规风险<\/li> 复杂混淆代码需要结合多种技术分析<\/li> <\/ol>

1. CDP协议基础与应用概述<\/h2>
Chrome DevTools Protocol (CDP)是Chrome浏览器提供的调试协议，允许开发者通过程序化的方式与浏览器交互，实现调试、监控和修改网页行为的功能。<\/p>

8.3 注意事项<\/h3>

微信版本更新可能导致工具失效<\/li>
CDP协议需要浏览器支持远程调试<\/li>
部分环境可能存在法律合规风险<\/li>
复杂混淆代码需要结合多种技术分析<\/li> <\/ol>