Mega Code Archive
Use RC2 to encrypt and decrypt text file
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using System;
using System.Security.Cryptography;
using System.Text;
using System.IO;
class RC2Sample
{
static void Main()
{
RC2 RC2alg = RC2.Create("RC2");
string sData = "this is a test";
string FileName = "Text.txt";
EncryptTextToFile(sData, FileName, RC2alg.Key, RC2alg.IV);
string Final = DecryptTextFromFile(FileName, RC2alg.Key, RC2alg.IV);
Console.WriteLine(Final);
}
public static void EncryptTextToFile(String Data, String FileName, byte[] Key, byte[] IV)
{
FileStream fStream = File.Open(FileName,FileMode.OpenOrCreate);
RC2 RC2alg = RC2.Create();
CryptoStream cStream = new CryptoStream(fStream,RC2alg.CreateEncryptor(Key,IV),CryptoStreamMode.Write);
StreamWriter sWriter = new StreamWriter(cStream);
sWriter.WriteLine(Data);
sWriter.Close();
cStream.Close();
fStream.Close();
}
public static string DecryptTextFromFile(String FileName, byte[] Key, byte[] IV)
{
FileStream fStream = File.Open(FileName, FileMode.OpenOrCreate);
RC2 RC2alg = RC2.Create();
CryptoStream cStream = new CryptoStream(fStream,RC2alg.CreateDecryptor(Key,IV),CryptoStreamMode.Read);
StreamReader sReader = new StreamReader(cStream);
string val = sReader.ReadLine();
sReader.Close();
cStream.Close();
fStream.Close();
return val;
}
}
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