#region DES加密/解密字符串

    //默认密钥向量

    private static byte[] Keys = { 0x11, 0x22, 0x33, 0x44, 0x55, 0xAA, 0xBB, 0xCC };

    public static string EncryptDES(string encryptString)

    {

        string encryptKey = StringUtils.ConvertToStr(GetConfig("CryptDESKey"), "abcd");//GetConfig方法为从配置文件读区数据

        return EncryptDES(encryptString, encryptKey);

    }

    /// <summary>

    /// DES加密字符串

    /// </summary>

    /// <param name="encryptString">待加密的字符串</param>

    /// <param name="encryptKey">加密密钥,要求为8位</param>

    /// <returns>加密成功返回加密后的字符串，失败返回源串</returns>

    public static string EncryptDES(string encryptString, string encryptKey)

    {

        try

        {

            byte[] rgbKey = Encoding.UTF8.GetBytes(encryptKey.Substring(, ));

            byte[] rgbIV = Keys;

            byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptString);

            DESCryptoServiceProvider dCSP = new DESCryptoServiceProvider();

            MemoryStream mStream = new MemoryStream();

            CryptoStream cStream = new CryptoStream(mStream, dCSP.CreateEncryptor(rgbKey, rgbIV), CryptoStreamMode.Write);

            cStream.Write(inputByteArray, , inputByteArray.Length);

            cStream.FlushFinalBlock();

            return Convert.ToBase64String(mStream.ToArray()).Replace("+", "%20");

        }

        catch (Exception ex)

        {

            return string.Empty;

        }

    }

    public static string DecryptDES(string decryptString)

    {

        string decryptKey = StringUtils.ConvertToStr(GetConfig("CryptDESKey"), "abcd");

        return DecryptDES(decryptString, decryptKey);

    }

    /// <summary>

    /// DES解密字符串

    /// </summary>

    /// <param name="decryptString">待解密的字符串</param>

    /// <param name="decryptKey">解密密钥,要求为8位,和加密密钥相同</param>

    /// <returns>解密成功返回解密后的字符串，失败返源串</returns>

    public static string DecryptDES(string decryptString, string decryptKey)

    {

        try

        {

            byte[] rgbKey = Encoding.UTF8.GetBytes(decryptKey);

            byte[] rgbIV = Keys;

            byte[] inputByteArray = Convert.FromBase64String(decryptString.Replace(' ', '+'));

            DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider();

            MemoryStream mStream = new MemoryStream();

            CryptoStream cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write);

            cStream.Write(inputByteArray, , inputByteArray.Length);

            cStream.FlushFinalBlock();

            return Encoding.UTF8.GetString(mStream.ToArray());

        }

        catch (Exception ex)

        {

            WrLogger logger = new WrLogger();

            logger.WriteException("App_Code.WebUtils.DecryptDES(string, string) Error, DecryptString:" + decryptString, ex);

            return string.Empty;

        }

    }

    #endregion