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import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.IOException;
import java.math.BigInteger;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Scanner;

public class JavaMD5Hashh {

	public static void main(String[] args)
 	{


 	System.out.println("Enter your username: ");
	Scanner scanner = new Scanner(System.in);
	String username = scanner.nextLine();
	System.out.println("Enter your password ");
	Scanner scanner2= new Scanner(System.in);
	String password = scanner2.nextLine();



		String user1 = "Tom";
		String user2= "Harry";

		String password1= "authentic";
		String password2 = "prevention";

		System.out.println("authentic in hex: " + md5(password1));
		System.out.println("prevention in hex: " + md5(password2));



		 try {

	            FileWriter writer = new FileWriter("MyFile2.txt", true);
	            writer.write(username + "     " + md5(password)); //five spaces
	            writer.write("\r\n");   // write new line
	            writer.close();

	        } catch (IOException e) {
	            e.printStackTrace();
	        }


 	}


 public static String md5(String input)
 	{

	 String md5 = null;

	 if(null == input) return null;

	 try
	 {
		 //Create MessageDigest object for MD5
		 MessageDigest digest = MessageDigest.getInstance("MD5");

		 //Update input string in message digest
		 digest.update(input.getBytes(), 0, input.length());
		 //Converts message digest value in base 16 (hex)
		 md5 = new BigInteger(1, digest.digest()).toString(16);
	 }
	 catch (NoSuchAlgorithmException e)
	 {
		 e.printStackTrace();
	 }
	 return md5;
 	}
 	}