MARKUS

using System;

using System.Collections.Generic;

using System.IO;

using System.Linq;

using System.Security.Cryptography;

using System.Text;

using System.Threading.Tasks;

namespace Markus.Service.Extensions

{

    public class Encrypt

    {

        public static class AESEncrypter

        {

            private static RijndaelManaged _rManaged = new RijndaelManaged();

            private static UTF8Encoding _utf8Encoder = new UTF8Encoding();

            static AESEncrypter()

            {

                MD5 _md5 = new MD5CryptoServiceProvider();

                _rManaged.KeySize = 256;

                _rManaged.BlockSize = 128;

                _rManaged.Mode = CipherMode.CBC;

                _rManaged.Padding = PaddingMode.PKCS7;

                _rManaged.Key = _md5.ComputeHash(_utf8Encoder.GetBytes("zxcvbnmasdfghjklqwertyuiop098765"));

                _rManaged.IV = _md5.ComputeHash(_utf8Encoder.GetBytes("qwertyuiopasdfghjklzxcvbnm123456"));

            }

            /// <summary>암호화</summary>

            /// <param name="val">암호화할 값</param>

            /// <returns>암호화된 값</returns>

            public static string Encrypt(string val)

            {

                string _resVal = string.Empty;

                byte[] _utf8Val = null;

                byte[] _encryptVal = null;

                ICryptoTransform tForm = _rManaged.CreateEncryptor();

                try

                {

                    if (!string.IsNullOrEmpty(val))

                    {

                        _utf8Val = _utf8Encoder.GetBytes(val);

                        _encryptVal = tForm.TransformFinalBlock(_utf8Val, 0, _utf8Val.Length);

                        _resVal = Convert.ToBase64String(_encryptVal);

                    }

                    else

                        _resVal = string.Empty;

                }

                catch

                {

                    _resVal = string.Empty;

                }

                return _resVal;

            }

            /// <summary>복호화</summary>

            /// <param name="val">복호화할 값</param>

            /// <returns>복호화된 값</returns>

            public static string Decrypt(string val)

            {

                string _resVal = string.Empty;

                byte[] _decryptVal = null;

                byte[] _encryptVal = null;

                ICryptoTransform tForm = _rManaged.CreateDecryptor();

                try

                {

                    if (!string.IsNullOrEmpty(val))

                    {

                        _encryptVal = Convert.FromBase64String(val);

                        _decryptVal = tForm.TransformFinalBlock(_encryptVal, 0, _encryptVal.Length);

                        _resVal = _utf8Encoder.GetString(_decryptVal);

                    }

                    else

                        _resVal = string.Empty;

                }

                catch

                {

                    _resVal = string.Empty;

                }

                return _resVal;

            }

        }

    }

}