是否可以制作DES / Triple DES文件加密器 [英] Is is possible to make a DES/Triple DES file encrypter

问题描述

我正在尝试制作DES和三重DES文件加密器，我无法找到关于DES文件加密的任何文章或视频，这就是我提出问题的原因。我已经尝试了以下代码，但我得到了无效的密钥错误，如果我将IV从16更改为8并不重要我仍然会收到此错误。



我试过的代码：

I am trying to make a DES and triple DES file encrypter i cant find any articles or videos on DES file encryption which is why i asked my question. I have tried the following code but i get invalided key error and it doesn't matter if i change the IV from 16 to 8 i still get this error.

The code i tried:

private void TDES_EncryptFile()
       {
           Stream myStream;
           SaveFileDialog saveFileDialog1 = new SaveFileDialog();
           saveFileDialog1.Filter = "Encrypted File (*.enc)|*.enc";
           saveFileDialog1.RestoreDirectory = true;

           if (saveFileDialog1.ShowDialog() == true)
           {
               if ((myStream = saveFileDialog1.OpenFile()) != null)
                   myStream.Close();

               string keyText = keys2.Text;
               byte[] keyBytes = ASCIIEncoding.ASCII.GetBytes(keyText);
               byte[] ivBytes = ASCIIEncoding.ASCII.GetBytes(keyText);
               string inputFile = Openfile.Text;
               string encryptedFile = saveFileDialog1.FileName;
               using (FileStream inputFileStream = File.Open(inputFile, FileMode.Open))
               using (FileStream outputFileStream = File.Open(encryptedFile, FileMode.Create))
               {
                   using (TripleDESCryptoServiceProvider tds = new TripleDESCryptoServiceProvider())
                   {
                       tds.Key = keyBytes;
                       tds.IV = ivBytes;

                       ICryptoTransform cryptoTransform = tds.CreateEncryptor();

                       using (CryptoStream cryptoStream = new CryptoStream(outputFileStream, cryptoTransform, CryptoStreamMode.Write))
                       {
                           byte[] buffer = new byte[inputFileStream.Length];
                           inputFileStream.Read(buffer, 0, buffer.Length);
                           cryptoStream.Write(buffer, 0, buffer.Length);
                           MessageBox.Show("The File Was Successfully Encrypted", "Encrypted!", MessageBoxButton.OK, MessageBoxImage.Information);
                       }
                   }
               }
           }
       }

推荐答案

事实证明我需要md5-hash我的密钥然后指定8个字符长IV

It turns out i needed to md5-hash my key and then specify 8 character long IV

byte[] keyBytes = md5.ComputeHash(utf.GetBytes(keyText));
byte[] ivBytes = ASCIIEncoding.ASCII.GetBytes(keyText.Substring(0, 8));

这篇关于是否可以制作DES / Triple DES文件加密器的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！