为什么我会收到“不良数据”错误？我使用.txt文件作为输入和输出 [英] Why am I getting "BAD DATA" error ? I am using a .txt file as an input and output

问题描述

  static   void  decrypt（ string  inputFile， string  outFile， string  key）
 {
 FileStream input =  new  FileStream（inputFile，FileMode.OpenOrCreate，FileAccess.Read）; 
  //   FileStream output = new FileStream（outFile，FileMode.OpenOrCreate，FileAccess.ReadWrite）;  
 DESCryptoServiceProvider desKeys =  new  DESCryptoServiceProvider（）; 
 desKeys.Key = ASCIIEncoding.ASCII.GetBytes（key）; 
 desKeys.IV = ASCIIEncoding.ASCII.GetBytes（key）; 
 CryptoStream decrypt =  new  CryptoStream（input，desKeys.CreateDecryptor（），CryptoStreamMode.Read）; 
 StreamWriter decrypted =  new  StreamWriter（outFile）; 
 decrypted.Write（ new  StreamReader（decrypt）.ReadToEnd（））; 
 decrypted.Flush（）; 
 decrypted.Close（）; 
 input.Close（）; 
} 

解决方案

您可以使用以下代码解决您的问题



加密：

 static void EncryptFile（string sInputFilename，string sOutputFilename，string sKey）
 {
 FileStream fsInput = new FileStream（sInputFilename，FileMode.Open，FileAccess.Read）; 
 FileStream fsEncrypted = new FileStream（sOutputFilename，FileMode.Create，FileAccess.Write）; 
 DESCryptoServiceProvider DES = new DESCryptoServiceProvider（）; 
 DES.Key = ASCIIEncoding.ASCII.GetBytes（sKey）; 
 DES.IV = DES.Key; 
 ICryptoTransform desencrypt = DES.CreateEncryptor（）; 
 CryptoStream cryptostream = new CryptoStream（fsEncrypted，desencrypt，CryptoStreamMode.Write）; 
 
 byte [] bytearrayinput = new byte [fsInput.Length]; 
 fsInput.Read（bytearrayinput，0，bytearrayinput.Length）; 
 cryptostream.Write（bytearrayinput，0，bytearrayinput.Length）; 
 cryptostream.Close（）; 
 fsInput.Close（）; 
 fsEncrypted.Close（）; 
} 

解密：

 static void DecryptFile（string sInputFilename，string sOutputFilename，string sKey）
 {
 try 
 {
 DESCryptoServiceProvider DES = new DESCryptoServiceProvider（）; 
 FileStream fsDecrypted = new FileStream（sOutputFilename，FileMode.Create，FileAccess.Write）; 
 //此提供程序需要64位密钥和IV。 
 
 //设置密钥用于DES算法。 
 DES.Key = ASCIIEncoding.ASCII.GetBytes（sKey）; 
 
 //设置初始化向量。 
 DES.IV = ASCIIEncoding.ASCII.GetBytes（sKey）; 
 
 //创建一个文件流以重新读取加密文件。 
 FileStream fsread = new FileStream（sInputFilename，FileMode.Open，FileAccess.Read）; 
 
 //从DES实例创建DES解密器。 
 
 ICryptoTransform desdecrypt = DES.CreateDecryptor（）; 
 CryptoStream cryptostream = new CryptoStream（fsDecrypted，desdecrypt，CryptoStreamMode.Write）; 
 
 byte [] bytearrayinput = new byte [fsread.Length]; 
 fsread.Read（bytearrayinput，0，bytearrayinput.Length）; 
 cryptostream.Write（bytearrayinput，0，bytearrayinput.Length）; 
 cryptostream.Close（）; 
 fsread.Close（）; 
 fsDecrypted.Close（）; 
} 
 catch（例外e）
 {
 Console.WriteLine（e.Message）; 
 Console.ReadKey（）; 
} 
} 

看起来钥匙没有在我的主要正确传递

谢谢所有

static void decrypt(string inputFile,string outFile,string key)
        {
            FileStream input = new FileStream(inputFile, FileMode.OpenOrCreate, FileAccess.Read);
            //FileStream output = new FileStream(outFile, FileMode.OpenOrCreate, FileAccess.ReadWrite);
            DESCryptoServiceProvider desKeys = new DESCryptoServiceProvider();
            desKeys.Key = ASCIIEncoding.ASCII.GetBytes(key);
            desKeys.IV = ASCIIEncoding.ASCII.GetBytes(key);
            CryptoStream decrypt = new CryptoStream(input, desKeys.CreateDecryptor(), CryptoStreamMode.Read);
            StreamWriter decrypted = new StreamWriter(outFile);
            decrypted.Write(new StreamReader(decrypt).ReadToEnd());
            decrypted.Flush();
            decrypted.Close();
            input.Close();
        }

解决方案

hi use the following code to solve your problem

Encryption:

static void EncryptFile(string sInputFilename, string sOutputFilename, string sKey)
  {
    FileStream fsInput = new FileStream(sInputFilename, FileMode.Open, FileAccess.Read);
   FileStream fsEncrypted = new FileStream(sOutputFilename, FileMode.Create, FileAccess.Write);
   DESCryptoServiceProvider DES = new DESCryptoServiceProvider();
   DES.Key = ASCIIEncoding.ASCII.GetBytes(sKey);
   DES.IV = DES.Key;
  ICryptoTransform desencrypt = DES.CreateEncryptor();
   CryptoStream cryptostream = new CryptoStream(fsEncrypted, desencrypt, CryptoStreamMode.Write);

   byte[] bytearrayinput = new byte[fsInput.Length];
   fsInput.Read(bytearrayinput, 0, bytearrayinput.Length);
   cryptostream.Write(bytearrayinput, 0, bytearrayinput.Length);
   cryptostream.Close();
   fsInput.Close();
   fsEncrypted.Close();
  }

Decryption:

static void DecryptFile(string sInputFilename, string sOutputFilename, string sKey)
  {
      try
      {
          DESCryptoServiceProvider DES = new DESCryptoServiceProvider();
          FileStream fsDecrypted = new FileStream(sOutputFilename, FileMode.Create, FileAccess.Write);
          //A 64 bit key and IV is required for this provider.

          //Set secret key For DES algorithm.
          DES.Key = ASCIIEncoding.ASCII.GetBytes(sKey);

          //Set initialization vector.
          DES.IV = ASCIIEncoding.ASCII.GetBytes(sKey);

          //Create a file stream to read the encrypted file back.
          FileStream fsread = new FileStream(sInputFilename,  FileMode.Open, FileAccess.Read);

          //Create a DES decryptor from the DES instance.

          ICryptoTransform desdecrypt = DES.CreateDecryptor();
          CryptoStream cryptostream = new CryptoStream(fsDecrypted, desdecrypt, CryptoStreamMode.Write);

          byte[] bytearrayinput = new byte[fsread.Length];
          fsread.Read(bytearrayinput, 0, bytearrayinput.Length);
          cryptostream.Write(bytearrayinput, 0, bytearrayinput.Length);
          cryptostream.Close();
          fsread.Close();
          fsDecrypted.Close();
      }
      catch (Exception e)
      {
          Console.WriteLine(e.Message);
          Console.ReadKey();
      }
  }

Looks like the key was not passed correctly in my main
thanks all

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