Java Password Encryption with PBE Key

JavaPBEKeySpecEncryption.java

package JavaPBEKeySpecEncryption;

/**
 *
 * @author daniel
 */
import java.io.Console;
import java.io.IOException;
import java.security.*;
import java.io.ByteArrayOutputStream;
import javax.xml.bind.DatatypeConverter;

import java.util.*;

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

public class JavaPBEKeySpecEncryption {

    public static void main(String[] args) {

        Console console = System.console();

        if (console == null) {
            System.out.print("Console unavailable");
            return;
        }

        String password = console.readLine("Enter password:");

        try {
            SecureRandom salt = new SecureRandom();
            int salt_len = 32;
            byte salt_bytes[] = new byte[salt_len];
            salt.nextBytes(salt_bytes);

            ByteArrayOutputStream data_to_hash = new ByteArrayOutputStream();
            data_to_hash.write(salt_bytes, 0, salt_len);
            data_to_hash.write(password.getBytes());

            SecretKeyFactory skf = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA512");

            int keyLength = 256;
            PBEKeySpec spec = new PBEKeySpec(password.toCharArray(), salt_bytes, 1000, keyLength);
            SecretKey key = skf.generateSecret(spec);
            byte[] digest = key.getEncoded();

            String hash_pwd = DatatypeConverter.printHexBinary(digest).toUpperCase();

            String salt_str = DatatypeConverter.printHexBinary(salt_bytes).toUpperCase();

            console.printf("Storing into db hash:" + hash_pwd);
            console.printf("\n");
            console.printf("Storing into db salt:" + salt_str);
            console.printf("\n");

        } catch (NoSuchAlgorithmException | InvalidKeySpecException e) {
            System.out.print("MD5 not supported for some reason");
            return;
        } catch (IOException e) {
            System.out.print("Could not prepare data for hashing");
            return;

        }

    }

}