DES加密解密工具

using System;
using System.Text;
using System.Security.Cryptography;
using System.IO;namespace DESPwd
{
public class DESUtil
{
static DESCryptoServiceProvider des = new DESCryptoServiceProvider(); public static DESCryptoServiceProvider DES
{
get { return des; }
}
const string EncryptionKey = "诺丽科技";
const string EncryptionIV = "kell";
public static string Encoder(string input)
{
byte[] SourceData = Encoding.Unicode.GetBytes(input);
byte[] returnData = null;
try
{
des.Key = ASCIIEncoding.Unicode.GetBytes(EncryptionKey);
des.IV = ASCIIEncoding.Unicode.GetBytes(EncryptionIV);
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write);
cs.Write(SourceData, , SourceData.Length);
cs.FlushFinalBlock();
returnData = ms.ToArray();
}
catch (Exception ex)
{
throw ex;
}
return Encoding.Unicode.GetString(returnData);
}
public static string Decoder(string input)
{
byte[] SourceData = Encoding.Unicode.GetBytes(input);
byte[] returnData = null;
try
{
DESCryptoServiceProvider desProvider = new DESCryptoServiceProvider();
desProvider.Key = Encoding.Unicode.GetBytes(EncryptionKey);
desProvider.IV = Encoding.Unicode.GetBytes(EncryptionIV);
MemoryStream ms = new MemoryStream();
ICryptoTransform encrypto = desProvider.CreateDecryptor();
CryptoStream cs = new CryptoStream(ms, encrypto, CryptoStreamMode.Write);
cs.Write(SourceData, , SourceData.Length);
cs.FlushFinalBlock();
returnData = ms.ToArray();
}
catch (Exception ex)
{
throw ex;
}
return Encoding.Unicode.GetString(returnData);
}
}
}

using System;
using System.Windows.Forms;namespace DESPwd
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
} private void button10_Click(object sender, EventArgs e)
{
textBox9.Text = DESUtil.Encoder(textBox8.Text);
} private void button11_Click(object sender, EventArgs e)
{
textBox11.Text = DESUtil.Decoder(textBox9.Text);
}
}
}