DI_Backup/DI/Agent/Services/HashService.cs

using System;
using System.Text;
using System.Security.Cryptography;
using log4net;
using System.IO;

namespace Agent.Services
{
    class HashService
    {
        private static readonly ILog log = LogManager.GetLogger(typeof(HashService));

        private readonly SHA256 _sha256 = SHA256.Create();

        private readonly MD5 _md5 = MD5.Create();

        /// <summary>
        /// SHA256 HEX 문자열 (-제거)
        /// </summary>
        /// <param name="plain"></param>
        /// <returns></returns>
        public string ToSHA256(string plain)
        {
            try
            {
                return ToSHA256(Encoding.UTF8.GetBytes(plain));
            }
            catch (Exception e)
            {
                log.Error(e);

                return null;
            }
        }
        private string ToSHA256(byte[] plain)
        {
            try
            {
                return BitConverter.ToString(_sha256.ComputeHash(plain)).Replace("-", "");
            }
            catch (Exception)
            {
                throw;
            }
        }

        /// <summary>
        /// 파일 -> MD5 HEX 문자열 (-제거)
        /// </summary>
        /// <param name="path"></param>
        /// <returns></returns>
        public string FileToMD5(string path)
        {
            try
            {
                using (FileStream fs = new FileStream(path, FileMode.Open, FileAccess.Read))
                {
                    byte[] buff = new byte[fs.Length];
                    fs.Read(buff, 0, buff.Length);
                    return ToMD5(buff);
                }
            }
            catch (Exception e)
            {
                log.Error(e);

                return null;
            }
        }
        private string ToMD5(byte[] plain)
        {
            try
            {
                return BitConverter.ToString(_md5.ComputeHash(plain)).Replace("-", "");
            }
            catch (Exception)
            {
                throw;
            }
        }


    }
}