JS逆向与前端加密暴力破解实战教程<\/h1>

一、无限debugger破解方法<\/h2>

1. 认识无限debugger<\/h3>
无限debugger是网站反调试的常见手段，通常通过`debugger<\/code>语句或Function("debugger").call()<\/code>等方式实现，导致调试器不断暂停执行。<\/p>`

2. 破解方法<\/h3>
(1) 条件断点法<\/h4>

在Chrome开发者工具中，找到触发debugger的代码行<\/li>
右键选择"Add conditional breakpoint"<\/li>
输入条件false<\/code>，这样断点永远不会触发<\/li>
<\/ul>
(2) 函数重写法<\/h4>
\/\/ 重写Function构造函数
<\/span><\/span><\/span><\/span>Function.prototype<\/span>.constructor<\/span> =<\/span> function<\/span>() {
<\/span><\/span>    return<\/span> function<\/span>(){};
<\/span><\/span>};
<\/span><\/span>
<\/span><\/span>\/\/ 或者直接禁用debugger
<\/span><\/span><\/span><\/span>var<\/span> _constructor<\/span> =<\/span> Function.prototype<\/span>.constructor<\/span>;
<\/span><\/span>Function.prototype<\/span>.constructor<\/span> =<\/span> function<\/span>() {
<\/span><\/span>    if<\/span>(arguments<\/span>[0<\/span>] ===<\/span> "debugger"<\/span>) {
<\/span><\/span>        return<\/span> function<\/span>(){};
<\/span><\/span>    }
<\/span><\/span>    return<\/span> _constructor<\/span>.apply<\/span>(this<\/span>, arguments<\/span>);
<\/span><\/span>};
<\/span><\/span><\/code><\/pre>(3) 禁用所有断点<\/h4>

在Chrome开发者工具的"Sources"面板<\/li>
点击右上角的"Deactivate breakpoints"图标(六边形带暂停符号)<\/li>
<\/ul>
(4) 使用Never Pause Here功能<\/h4>

在触发debugger的行上右键<\/li>
选择"Never pause here"<\/li>
<\/ul>
(5) 修改浏览器核心<\/h4>

对于顽固的VM18XX环境，可能需要修改浏览器核心代码<\/li>
示例代码：<\/li>
<\/ul>
\/\/ 在控制台执行
<\/span><\/span><\/span><\/span>let<\/span> oldFunction<\/span> =<\/span> Function.prototype<\/span>.constructor<\/span>;
<\/span><\/span>Function.prototype<\/span>.constructor<\/span> =<\/span> function<\/span>(a<\/span>) {
<\/span><\/span>    if<\/span>(a<\/span> ==<\/span> "debugger"<\/span>) {
<\/span><\/span>        console<\/span>.log<\/span>("debugger blocked"<\/span>);
<\/span><\/span>        return<\/span> function<\/span>(){};
<\/span><\/span>    }
<\/span><\/span>    return<\/span> oldFunction<\/span>(a<\/span>);
<\/span><\/span>};
<\/span><\/span><\/code><\/pre>二、加速乐\/BAT反爬破解<\/h2>
1. 加速乐原理分析<\/h3>
加速乐通过以下方式实现防护：<\/p>

动态cookie生成（如__jsl_clearance_s<\/code>）<\/li>
浏览器指纹检测<\/li>
行为验证<\/li>
代码混淆<\/li>
<\/ul>
2. 破解步骤<\/h3>
(1) 获取动态cookie<\/h4>
\/\/ 示例：解析加速乐cookie生成逻辑
<\/span><\/span><\/span><\/span>function<\/span> getCookie<\/span>() {
<\/span><\/span>    \/\/ 通常包含以下步骤：
<\/span><\/span><\/span><\/span>    \/\/ 1. 获取初始cookie
<\/span><\/span><\/span><\/span>    \/\/ 2. 解析服务器返回的JS挑战
<\/span><\/span><\/span><\/span>    \/\/ 3. 执行数学运算生成最终cookie
<\/span><\/span><\/span><\/span>    \/\/ 4. 设置cookie并重定向
<\/span><\/span><\/span><\/span>    return<\/span> calculatedCookie<\/span>;
<\/span><\/span>}
<\/span><\/span><\/code><\/pre>(2) 绕过浏览器指纹检测<\/h4>
\/\/ 覆盖常见指纹检测点
<\/span><\/span><\/span><\/span>Object.defineProperty<\/span>(navigator<\/span>, 'webdriver'<\/span>, {
<\/span><\/span>    get<\/span>:<\/span> () => false<\/span>
<\/span><\/span>});
<\/span><\/span>
<\/span><\/span>Object.defineProperty<\/span>(navigator<\/span>, 'plugins'<\/span>, {
<\/span><\/span>    get<\/span>:<\/span> () => [1<\/span>, 2<\/span>, 3<\/span>],
<\/span><\/span>});
<\/span><\/span>
<\/span><\/span>Object.defineProperty<\/span>(navigator<\/span>, 'languages'<\/span>, {
<\/span><\/span>    get<\/span>:<\/span> () => ['zh-CN'<\/span>, 'zh'<\/span>],
<\/span><\/span>});
<\/span><\/span><\/code><\/pre>(3) 处理代码混淆<\/h4>

使用AST工具解析混淆代码<\/li>
关键点：

识别字符串加密<\/li>
还原控制流平坦化<\/li>
重建函数调用关系<\/li>
<\/ul>
<\/li>
<\/ul>
3. 完整破解流程<\/h3>

首次请求获取JS挑战<\/strong><\/li>
<\/ol>
import<\/span> requests
<\/span><\/span>
<\/span><\/span>first_response =<\/span> requests.<\/span>get("https:\/\/target.com"<\/span>)
<\/span><\/span>jsl_script =<\/span> extract_jsl_script(first_response.<\/span>text)  # 提取JS挑战代码<\/span>
<\/span><\/span><\/code><\/pre>
解析并执行JS代码<\/strong><\/li>
<\/ol>
import<\/span> execjs
<\/span><\/span>
<\/span><\/span>ctx =<\/span> execjs.<\/span>compile(jsl_script)
<\/span><\/span>cookie_value =<\/span> ctx.<\/span>call("generateCookie"<\/span>)  # 调用生成cookie的函数<\/span>
<\/span><\/span><\/code><\/pre>
携带cookie发起正式请求<\/strong><\/li>
<\/ol>
cookies =<\/span> {"__jsl_clearance_s"<\/span>: cookie_value}
<\/span><\/span>final_response =<\/span> requests.<\/span>get("https:\/\/target.com"<\/span>, cookies=<\/span>cookies)
<\/span><\/span><\/code><\/pre>三、前端加密分析与暴力破解<\/h2>
1. 常见加密方式<\/h3>

RSA\/AES对称加密<\/li>
自定义加密算法<\/li>
哈希运算（MD5, SHA等）<\/li>
数据编码（Base64, Hex等）<\/li>
<\/ul>
2. 加密定位方法<\/h3>
(1) 搜索关键函数<\/h4>

在开发者工具中搜索：

encrypt<\/code><\/li>
decrypt<\/code><\/li>
sign<\/code><\/li>
key<\/code><\/li>
AES<\/code><\/li>
RSA<\/code><\/li>
<\/ul>
<\/li>
<\/ul>
(2) XHR断点<\/h4>

在"Sources"面板添加XHR断点<\/li>
拦截所有包含特定字符串的请求<\/li>
<\/ul>
(3) 堆栈追踪<\/h4>

在加密参数位置下断点<\/li>
查看调用堆栈(Call Stack)定位加密函数<\/li>
<\/ul>
3. 暴力破解示例<\/h3>
(1) 简单加密破解<\/h4>
\/\/ 假设发现如下加密函数
<\/span><\/span><\/span><\/span>function<\/span> encrypt<\/span>(input<\/span>) {
<\/span><\/span>    var<\/span> result<\/span> =<\/span> ""<\/span>;
<\/span><\/span>    for<\/span>(var<\/span> i<\/span> =<\/span> 0<\/span>; i<\/span> <<\/span> input<\/span>.length<\/span>; i<\/span>++<\/span>) {
<\/span><\/span>        result<\/span> +=<\/span> String.fromCharCode<\/span>(input<\/span>.charCodeAt<\/span>(i<\/span>) +<\/span> 1<\/span>);
<\/span><\/span>    }
<\/span><\/span>    return<\/span> result<\/span>;
<\/span><\/span>}
<\/span><\/span>
<\/span><\/span>\/\/ 暴力破解解密函数
<\/span><\/span><\/span><\/span>function<\/span> decrypt<\/span>(encrypted<\/span>) {
<\/span><\/span>    var<\/span> result<\/span> =<\/span> ""<\/span>;
<\/span><\/span>    for<\/span>(var<\/span> i<\/span> =<\/span> 0<\/span>; i<\/span> <<\/span> encrypted<\/span>.length<\/span>; i<\/span>++<\/span>) {
<\/span><\/span>        result<\/span> +=<\/span> String.fromCharCode<\/span>(encrypted<\/span>.charCodeAt<\/span>(i<\/span>) -<\/span> 1<\/span>);
<\/span><\/span>    }
<\/span><\/span>    return<\/span> result<\/span>;
<\/span><\/span>}
<\/span><\/span><\/code><\/pre>(2) 复杂加密破解流程<\/h4>

定位加密函数<\/li>
提取加密算法<\/li>
分析密钥生成方式<\/li>
模拟加密过程或直接调用加密函数<\/li>
构建自动化破解工具<\/li>
<\/ol>
四、实战技巧与工具<\/h2>
1. 常用工具<\/h3>

Chrome开发者工具<\/li>
Fiddler\/Charles抓包工具<\/li>
AST解析工具（Babel, Esprima）<\/li>
Python execjs库<\/li>
Node.js调试环境<\/li>
<\/ul>
2. 高级技巧<\/h3>

Hook关键函数<\/strong>：<\/li>
<\/ul>
\/\/ Hook加密函数示例
<\/span><\/span><\/span><\/span>let<\/span> oldEncrypt<\/span> =<\/span> window.encrypt<\/span>;
<\/span><\/span>window.encrypt<\/span> =<\/span> function<\/span>(data<\/span>) {
<\/span><\/span>    console<\/span>.log<\/span>("加密输入:"<\/span>, data<\/span>);
<\/span><\/span>    let<\/span> result<\/span> =<\/span> oldEncrypt<\/span>(data<\/span>);
<\/span><\/span>    console<\/span>.log<\/span>("加密结果:"<\/span>, result<\/span>);
<\/span><\/span>    return<\/span> result<\/span>;
<\/span><\/span>};
<\/span><\/span><\/code><\/pre>
环境模拟<\/strong>：<\/li>
<\/ul>
\/\/ 模拟浏览器环境
<\/span><\/span><\/span><\/span>const<\/span> jsdom<\/span> =<\/span> require<\/span>("jsdom"<\/span>);
<\/span><\/span>const<\/span> { JSDOM<\/span> } =<\/span> jsdom<\/span>;
<\/span><\/span>const<\/span> dom<\/span> =<\/span> new<\/span> JSDOM<\/span>(`<!DOCTYPE html>`<\/span>);
<\/span><\/span>window =<\/span> dom<\/span>.window;
<\/span><\/span>document =<\/span> window.document;
<\/span><\/span><\/code><\/pre>
自动化处理<\/strong>：<\/li>
<\/ul>
# Python自动化示例<\/span>
<\/span><\/span>from<\/span> selenium import<\/span> webdriver
<\/span><\/span>from<\/span> selenium.webdriver.chrome.options import<\/span> Options
<\/span><\/span>
<\/span><\/span>options =<\/span> Options()
<\/span><\/span>options.<\/span>add_argument("--disable-blink-features=AutomationControlled"<\/span>)
<\/span><\/span>driver =<\/span> webdriver.<\/span>Chrome(options=<\/span>options)
<\/span><\/span>
<\/span><\/span>driver.<\/span>get("https:\/\/target.com"<\/span>)
<\/span><\/span># 执行JS代码破解加密<\/span>
<\/span><\/span>result =<\/span> driver.<\/span>execute_script("return encrypt('test');"<\/span>)
<\/span><\/span><\/code><\/pre>五、注意事项<\/h2>

遵守法律法规，仅用于授权测试<\/li>
复杂加密可能需要动态分析结合静态分析<\/li>
注意网站更新频率，加密方式可能经常变化<\/li>
处理反调试时要考虑性能影响<\/li>
真实环境中可能需要组合多种破解方法<\/li>
<\/ol>
通过以上方法，可以系统性地分析和破解前端加密及反调试机制。实际应用中需要根据具体场景灵活组合这些技术。<\/p>
JS逆向与前端加密暴力破解实战教程<\/h1>

一、无限debugger破解方法<\/h2>

1. 认识无限debugger<\/h3> 无限debugger是网站反调试的常见手段，通常通过debugger<\/code>语句或Function("debugger").call()<\/code>等方式实现，导致调试器不断暂停执行。<\/p>

二、加速乐\/BAT反爬破解<\/h2>

2. 破解步骤<\/h3>

三、前端加密分析与暴力破解<\/h2>

2. 加密定位方法<\/h3>

3. 暴力破解示例<\/h3>

四、实战技巧与工具<\/h2>

1. 认识无限debugger<\/h3>
无限debugger是网站反调试的常见手段，通常通过`debugger<\/code>语句或Function("debugger").call()<\/code>等方式实现，导致调试器不断暂停执行。<\/p>`
