using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Security.Cryptography;
using System.Text;
using System.Web;

namespace UAS_MES.PublicMethod
{
    class Encryption
    {

        private static string encryptKey = "MUPSWORD";

        public static string EncryptStr(string pToEncrypt)
        {
            using (DESCryptoServiceProvider des = new DESCryptoServiceProvider())
            {

                byte[] inputByteArray = Encoding.UTF8.GetBytes(pToEncrypt);
                des.Key = ASCIIEncoding.ASCII.GetBytes(encryptKey);
                des.IV = ASCIIEncoding.ASCII.GetBytes(encryptKey);
                System.IO.MemoryStream ms = new System.IO.MemoryStream();
                using (CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write))
                {
                    cs.Write(inputByteArray, 0, inputByteArray.Length);
                    cs.FlushFinalBlock();
                    cs.Close();
                }
                string str = Convert.ToBase64String(ms.ToArray());
                ms.Close();
                return str;
            }
        }

        public static string GETMD5(string password)
        {
            //初始化MD5对象
            MD5 md5 = MD5.Create();

            //将源字符串转化为byte数组
            Byte[] soucebyte = Encoding.Default.GetBytes(password);

            //soucebyte转化为mf5的byte数组
            Byte[] md5bytes = md5.ComputeHash(soucebyte);

            //将md5的byte数组再转化为MD5数组
            StringBuilder sb = new StringBuilder();
            foreach (Byte b in md5bytes)
            {
                //x表示16进制，2表示2位
                sb.Append(b.ToString("x2"));

            }
            return sb.ToString();
        }

        public static string DecryptStr(string pToDecrypt)
        {
            byte[] inputByteArray = Convert.FromBase64String(pToDecrypt);
            using (DESCryptoServiceProvider des = new DESCryptoServiceProvider())
            {

                des.Key = ASCIIEncoding.ASCII.GetBytes(encryptKey);
                des.IV = ASCIIEncoding.ASCII.GetBytes(encryptKey);
                System.IO.MemoryStream ms = new System.IO.MemoryStream();
                using (CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write))
                {
                    cs.Write(inputByteArray, 0, inputByteArray.Length);
                    cs.FlushFinalBlock();
                    cs.Close();
                }
                string str = Encoding.UTF8.GetString(ms.ToArray());
                ms.Close();
                return str;
            }
        }
    }
}