import java.nio.charset.StandardCharsets;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Base64;

import org.jsoup.Jsoup;
import org.jsoup.safety.Safelist;

class Main {
  public static void main(String[] args)  throws NoSuchAlgorithmException{
    System.out.println("Hello world!");
    System.out.println(getHashedPassword("123456", "test"));
    String unsafeHtml = "<script>alert('Hello, world!'');</script>";
    String safeHtml = Jsoup.clean(unsafeHtml, Safelist.basic());
    System.out.println(safeHtml);
    System.out.println(unsafeHtml);
  }

  public static String getHashedPassword(String password, String salt) throws NoSuchAlgorithmException{
    String saltedPassword = password + salt;
    MessageDigest messageDigest = MessageDigest.getInstance("SHA-256");
    byte[] hash = messageDigest.digest(saltedPassword.getBytes(StandardCharsets.UTF_8));
    return new String(Base64.getEncoder().encode(hash));
  }
}