using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Security.Cryptography;

namespace MD5加密
{
    class Program
    {
        static void Main(string[] args)
        {
            string s = GetMD5("123");

            Console.WriteLine(s);
            Console.ReadLine();
        }

        public static string GetMD5(string str)
        {
            MD5 md5 = MD5.Create();

            //开始加密
            //需要将字符转换成字节数组
            byte[] buffer = Encoding.Default.GetBytes(str);


            byte[] MD5Buffer = md5.ComputeHash(buffer);

            //字符数组--> 字符串
            //将字节数组中每个元素按照指定的编码格式解析成字符串
            //直接将数组ToString()
            //将字节数组中的每个元素ToString()
            //返回加密好的字符数组 

            string strNew = "";
            for (int i = 0; i < MD5Buffer.Length; i++ )
            {
                //x 转成十六进制
                //2 0x0A而不是0xA
                strNew += MD5Buffer[i].ToString("x2");
                //202cb962ac59075b964b07152d234b70

                //strNew += MD5Buffer[i].ToString("x");
                //202cb962ac5975b964b7152d234b70


            }
                return strNew;
        }
    }
}