import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Scanner;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 * Created by Martynas on 2017-04-24.
 */
public class Main {
    private static MessageDigest md;

    public static void main(String[] args) {

        System.out.println("Create login:");
        Scanner scan = new Scanner(System.in);
        String login = scan.next();
        System.out.println("Create password");
        String password = scan.next();


        boolean loggedIn = false;

        while(!loggedIn) {
            System.out.println();
            System.out.println("Write your login:");
            String tempLogin = scan.next();
            if (tempLogin.equals(login)) {
                System.out.println();
                System.out.println("Write your password:");
                String tempPassword = scan.next();
                if(cryptWithMD5(password).equals(cryptWithMD5(tempPassword))){
                    System.out.println(cryptWithMD5(password));
                    System.out.println("Login successful");
                    loggedIn = true;
                } else System.out.println("Wrong password");

            } else System.out.println("wrong login");
        }
    }

    public static String cryptWithMD5(String pass){
        try {
            md = MessageDigest.getInstance("MD5");
            byte[] passBytes = pass.getBytes();
            md.reset();
            byte[] digested = md.digest(passBytes);
            StringBuffer sb = new StringBuffer();
            for(int i=0;i<digested.length;i++){
                sb.append(Integer.toHexString(0xff & digested[i]));
            }
            return sb.toString();
        } catch (NoSuchAlgorithmException ex) {
            Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
        }
        return null;


    }

}