JS逆向加密——Base64方法的處理

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在Js逆向的過(guò)程中經(jīng)常遇到  window.btoa() /window.atob() :

   這是 瀏覽器內(nèi)置的Base64 編碼和解碼 ，第十六題案例，第十九題案例  等等

解決方式 ：

1.   簡(jiǎn)單字符串使用 Buffer 方法

• 
  
  // atob base64 編碼
  
  
• 
  
  var s = new Buffer.from("待解碼的字符串", "base64").toString("binary")
  
  
• 
  
  
  
  
• 
  
  // btoa base64 解碼
  
  
• 
  
  var s = new Buffer.from("待編碼的字符串", "binary").toString("base64")
  
  
  

2. python爬蟲直接改寫

• 
  
  import base64
  
  
• 
  
  
  
  
• 
  
  # atob  base64編碼
  
  
• 
  
  s = base64.b64encode("待解碼的字符".encode("utf8")).decode()
  
  
• 
  
  
  
  
• 
  
  # btoa  base64解碼
  
  
• 
  
  s = base64.b64decode("待編碼的字符".encode("utf8")).decode()
  
  
  

3. 直接用JS實(shí)現(xiàn)Base64功能

以下是 完整JS的base64代碼

// 這是 完整可用的JS實(shí)現(xiàn)base64編碼的模塊

var Base64 = {

    // private property

    _keyStr: "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/="

    // public method for encoding

    , encode: function (input)

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關(guān)鍵詞：Base tostring python爬蟲 function property