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);

        }

    }

}