암호화 클래스

/// <summary> 

    ///   

    /// </summary> 

    public class AES

    { 

        //      

        private static byte[] Keys = { 0x41, 0x72, 0x65, 0x79, 0x6F, 0x75, 0x6D, 0x79, 0x53, 0x6E, 0x6F, 0x77, 0x6D, 0x61, 0x6E, 0x3F };



        public static string Encode(string encryptString, string encryptKey)

        {

            encryptKey = Utils.GetSubString(encryptKey, 32, "");

            encryptKey = encryptKey.PadRight(32, ' ');



            RijndaelManaged rijndaelProvider = new RijndaelManaged();

            rijndaelProvider.Key = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 32));

            rijndaelProvider.IV = Keys;

            ICryptoTransform rijndaelEncrypt = rijndaelProvider.CreateEncryptor();

 

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

            byte[] encryptedData = rijndaelEncrypt.TransformFinalBlock(inputData,0,inputData.Length);



            return Convert.ToBase64String(encryptedData);

        }

    

        public static string Decode(string decryptString, string decryptKey)

        {

            if (decryptString == string.Empty)

            {

                return string.Empty;

            }

            try

            {

                decryptKey = Utils.GetSubString(decryptKey, 32, "");

                decryptKey = decryptKey.PadRight(32, ' ');



                RijndaelManaged rijndaelProvider = new RijndaelManaged();

                rijndaelProvider.Key = Encoding.UTF8.GetBytes(decryptKey);

                rijndaelProvider.IV = Keys;

                ICryptoTransform rijndaelDecrypt = rijndaelProvider.CreateDecryptor();

 

                byte[] inputData = Convert.FromBase64String(decryptString);

                byte[] decryptedData = rijndaelDecrypt.TransformFinalBlock(inputData,0,inputData.Length);



                return Encoding.UTF8.GetString(decryptedData);

            }

            catch

            {

                return "";

            }



        }



    }



    /// <summary> 

    ///   

    /// </summary> 

    public class DES

    { 

        //      

        private static byte[] Keys = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };

        

        /// <summary>

        /// DES     

        /// </summary>

        /// <param name="encryptString">       </param>

        /// <param name="encryptKey">    ,   8 </param>

        /// <returns>             ,      </returns>

        public static string Encode(string encryptString, string encryptKey)

        {

            encryptKey = Utils.GetSubString(encryptKey, 8, "");

            encryptKey = encryptKey.PadRight(8, ' ');

            byte[] rgbKey = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 8));

            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, 0, inputByteArray.Length);

            cStream.FlushFinalBlock();

            return Convert.ToBase64String(mStream.ToArray());

        

        }



        /// <summary>

        /// DES     

        /// </summary>

        /// <param name="decryptString">       </param>

        /// <param name="decryptKey">    ,   8 ,       </param>

        /// <returns>             ,     </returns>

        public static string Decode(string decryptString, string decryptKey)

        {

            try

            {

                decryptKey = Utils.GetSubString(decryptKey, 8, "");

                decryptKey = decryptKey.PadRight(8, ' ');

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

                byte[] rgbIV = Keys;

                byte[] inputByteArray = Convert.FromBase64String(decryptString);

                DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider();

        

                MemoryStream mStream = new MemoryStream();

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

                cStream.Write(inputByteArray, 0, inputByteArray.Length);

                cStream.FlushFinalBlock();

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

            }

            catch

            {

                return "";

            }        

        }

    }