DES復号化(親測定可)

  
  
  
  

   
   
   
   
//    
   
   
   
   
 string MyDESCrypto(string str, byte[] keys, byte[] ivs)  
   
   
   
   
    {  
   
   
   
   
        //   
   
   
   
   
        byte[] strs = Encoding.Unicode.GetBytes(str);  
   
   
   
   
 
   
   
   
   
 
   
   
   
   
        DESCryptoServiceProvider desc = new DESCryptoServiceProvider();  
   
   
   
   
        MemoryStream mStream = new MemoryStream();  
   
   
   
   
 
   
   
   
   
        ICryptoTransform transform = desc.CreateEncryptor(keys, ivs);//   
   
   
   
   
        CryptoStream cStream = new CryptoStream(mStream, transform, CryptoStreamMode.Write);  
   
   
   
   
        cStream.Write(strs, 0, strs.Length);  
   
   
   
   
        cStream.FlushFinalBlock();  
   
   
   
   
        return Convert.ToBase64String(mStream.ToArray());  
   
   
   
   
    }  
   
   
   
   
 
   
   
   
   
 
   
   
   
   
    string MyDESCryptoDe(string str, byte[] keys, byte[] ivs)  
   
   
   
   
    {  
   
   
   
   
        //   
   
   
   
   
        byte[] strs = Convert.FromBase64String(str);  
   
   
   
   
 
   
   
   
   
        DESCryptoServiceProvider desc = new DESCryptoServiceProvider();  
   
   
   
   
        MemoryStream mStream = new MemoryStream();  
   
   
   
   
 
   
   
   
   
        ICryptoTransform transform = desc.CreateDecryptor(keys, ivs);//   
   
   
   
   
 
   
   
   
   
        CryptoStream cStream = new CryptoStream(mStream, transform, CryptoStreamMode.Write);  
   
   
   
   
        cStream.Write(strs, 0, strs.Length);  
   
   
   
   
        cStream.FlushFinalBlock();  
   
   
   
   
        return Encoding.Unicode.GetString(mStream.ToArray());  
   
   
   
   
    }