using System.Security.Cryptography;
using System.Text;

namespace ConsoleApp1
{
    internal class Program
    {
        static void Main(string[] args)
        {
            string username = "boot";
            string password = "#Ba~rk4ekf2,UdCW";
            string u3 = string.Format("{0}:{1}", username, password);
            //a8a5159edab2acadd2272b9a08e6d3b0
            //a8a5159edab2acadd2272b9a8e6d3b0
            //a8a5159edab2acadd2272b9a08e6d3b0
            //a8a5159edab2acadd2272b9a08e6d3b0
            //0001993c04ee2584d558e5004dd7ff2d
            //a8a5159edab2acadd2272b9a08e6d3b0
            string HHH = GetMD5(u3);
            string hash = GetMD5Hash1(u3).ToLower();
            Console.WriteLine("Hello, World!");
        }

        static string GetMD5Hash(string input)
        {
            using (HashAlgorithm algorithm = MD5.Create()) // 更现代的写法，自动处理资源释放
            {
                byte[] inputBytes = Encoding.UTF8.GetBytes(input); // 将字符串转换为字节数组
                byte[] hashBytes = algorithm.ComputeHash(inputBytes); // 计算哈希值
                return Convert.ToHexString(hashBytes); // 将字节数组转换为十六进制字符串（C# 8及以上版本）
            }
        }

        static string GetMD5Hash1(string input)
        {
            StringBuilder sb = new StringBuilder(32); // 预分配32字符空间
            using (HashAlgorithm algorithm = MD5.Create())
            {
                byte[] inputBytes = Encoding.UTF8.GetBytes(input);
                byte[] hashBytes = algorithm.ComputeHash(inputBytes);

                foreach (byte b in hashBytes)
                {
                    sb.Append(b.ToString("x2")); // 使用"x2"确保总是两位十六进制
                }
            }
            return sb.ToString();
        }
        public static string GetMD5(string str)
        {
            //创建MD5对象
            MD5 mD5 = MD5.Create();
            byte[] buffer = Encoding.Default.GetBytes(str);
            var MD5Buffer = mD5.ComputeHash(buffer);
            //将字节数组转换为字符串
            //法一：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
            //return Encoding.Default.GetString(MD5Buffer);(会造成乱码)
            //法二：直接将数组tostring
            //法三：直接将数组中的每个元素ToString()
            string s = "";
            for (int i = 0; i < MD5Buffer.Length; i++)
            {
                s += MD5Buffer[i].ToString("x");//tostring中的参数x是将10进制转化为16进制
            }
            return s;
        }
    }
}