Decrypting a file : Encrypt Decrypt File : File Directory Stream C# Examples

    
using  System;
using  System.IO;
using  System.Security.Cryptography;

class  MainClass
{
    public  static  void  Main()  
    {
        TripleDESCryptoServiceProvider  tdes  =  new  TripleDESCryptoServiceProvider();

        FileStream  fsKeyIn  =  File.OpenRead(@"c:\encrypted.key");
        
        BinaryReader  br  =  new  BinaryReader(fsKeyIn);

        tdes.Key  =  br.ReadBytes(24);
        tdes.IV  =  br.ReadBytes(8);

        FileStream  fsIn  =  File.OpenRead(@"c:\encrypted.txt");

        CryptoStream  cs  =  new  CryptoStream(fsIn,  tdes.CreateDecryptor(),CryptoStreamMode.Read);

        StreamReader  sr  =  new  StreamReader(cs);

        Console.WriteLine(sr.ReadToEnd());
        sr.Close();
    }
}