JS解密：jsfuck 技術原理解析

jsfuck 簡介

• jsfuck 源於一門編程語言 brainfuck，其主要的思想就是隻使用8種特定的符號來編寫代碼；

• jsfuck 也是沿用了這個思想，它僅僅使用6種符號來編寫代碼，它們分別是 (、)、+、[、]、!；

• github:https://github.com/aemkei/jsfuck

• 下面這串代碼，複製黏貼到 consle 中執行：

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• 執行的結果如下圖所示，窗口彈出數字 “1”：

  
  

生成 jsfuck 代碼

• 我們也可以在 jsfuck 調試網站，將普通的 js 代碼轉換成 jsfuck 代碼；

調試網站：http://www.jsfuck.com/

jsfuck 調試

• 複製下面的代碼，在 console 中執行；

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• 發現 console 提示下面的錯誤；

  
  

• 此時我們需要把代碼複製到 notepad++ 編輯器，鼠標放在代碼最後，如下圖：

  
  

• 之後往上翻，查找對應的左半邊括號，如下圖：

  
  
• 將【括號內部】的代碼，複製到 console 中執行，得到下面的代碼：