import javax.crypto.*;
import javax.crypto.spec.*;
import java.util.*;

public class aes {
    public static void main(String[] a) throws Exception {
        Scanner s = new Scanner(System.in);
        System.out.print("Key (16 chars): ");
        SecretKeySpec k = new SecretKeySpec(s.nextLine().getBytes(), "AES");
        Cipher c = Cipher.getInstance("AES");
        System.out.print("Msg: ");
        String m = s.nextLine();
        
        c.init(Cipher.ENCRYPT_MODE, k);
        String e = Base64.getEncoder().encodeToString(c.doFinal(m.getBytes()));
        System.out.println("Enc: " + e);
        
        c.init(Cipher.DECRYPT_MODE, k);
        System.out.println("Dec: " + new String(c.doFinal(Base64.getDecoder().decode(e))));
    }
}