DES加密解密类

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Security.Cryptography;
using System.Globalization;

namespace PubClass
{
   public class DES
    {

        // 创建Key  
        public string GenerateKey()
        {

            DESCryptoServiceProvider desCrypto = (DESCryptoServiceProvider)DESCryptoServiceProvider.Create();

            return ASCIIEncoding.ASCII.GetString(desCrypto.Key);
        }

        // 加密字符串   
        public string EncryptString(string sInputString, string sKey)
        {

            byte[] data = Encoding.UTF8.GetBytes(sInputString);
            DESCryptoServiceProvider DES = new DESCryptoServiceProvider();
            DES.Key = ASCIIEncoding.ASCII.GetBytes(sKey);

            DES.IV = ASCIIEncoding.ASCII.GetBytes(sKey);
            ICryptoTransform desencrypt = DES.CreateEncryptor();
            byte[] result = desencrypt.TransformFinalBlock(data, 0, data.Length);
            return BitConverter.ToString(result);
        }
        // 解密字符串  

        public string DecryptString(string sInputString, string sKey)
        {

            string[] sInput = sInputString.Split("-".ToCharArray());
            byte[] data = new byte[sInput.Length];
            for (int i = 0; i < sInput.Length; i++)
            {

                data[i] = byte.Parse(sInput[i], NumberStyles.HexNumber);
            }
            DESCryptoServiceProvider DES = new DESCryptoServiceProvider();
            DES.Key = ASCIIEncoding.ASCII.GetBytes(sKey);
            DES.IV = ASCIIEncoding.ASCII.GetBytes(sKey);
            ICryptoTransform desencrypt = DES.CreateDecryptor();
            byte[] result = desencrypt.TransformFinalBlock(data, 0, data.Length);
            return Encoding.UTF8.GetString(result);
        }
    }
}