using System;
using System.Security.Cryptography;
using System.IO;
using System.Text;
public static class Utility
{
private static byte[] _bytes = ASCIIEncoding.ASCII.GetBytes("AAAAAAAA");
public static string Encrypt(string originalString)
{
if (String.IsNullOrEmpty(originalString))
{
throw new ArgumentNullException("The string which needs to be encrypted can not be empty.");
}
DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider();
MemoryStream memoryStream = new MemoryStream();
CryptoStream cryptoStream = new CryptoStream(memoryStream, cryptoProvider.CreateEncryptor(_bytes, _bytes), CryptoStreamMode.Write);
StreamWriter writer = new StreamWriter(cryptoStream);
writer.Write(originalString);
writer.Flush();
cryptoStream.FlushFinalBlock();
writer.Flush();
return Convert.ToBase64String(memoryStream.GetBuffer(), 0, (int)memoryStream.Length);
}
public static string Decrypt(string cryptedString)
{
if (String.IsNullOrEmpty(cryptedString))
{
throw new ArgumentNullException("The string which needs to be decrypted can not be empty.");
}
DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider();
MemoryStream memoryStream = new MemoryStream(Convert.FromBase64String(cryptedString));
CryptoStream cryptoStream = new CryptoStream(memoryStream, cryptoProvider.CreateDecryptor(_bytes, _bytes), CryptoStreamMode.Read);
StreamReader reader = new StreamReader(cryptoStream);
return reader.ReadToEnd();
}
}