import java.math.BigInteger;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Arrays;


public class Main {

    /**
     * @param args
     * @throws NoSuchAlgorithmException
     * @throws UnsupportedEncodingException
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        String pass = "blabla";
        String salt = "9B3AF463E1270DC5511D86293D23C0D1"; //Result suppose to be 535791F2391DCE9AD6FEBB9C49DC53FD

        // convert your hex string to bytes
        byte[] bytesSalt = new BigInteger(salt, 16).toByteArray();
        byte[] bytePass = pass.getBytes();
        // get the MD5 digest library, not sure why this isn't just part of the jdk
        MessageDigest md5Digest = null;
        try {
            md5Digest = MessageDigest.getInstance("MD5");
        } catch (NoSuchAlgorithmException e) {
            // error handling here...
        }
        // add the bytes to our digest
        md5Digest.update(bytesSalt);
        md5Digest.update(bytePass);
        // get the digest bytes
        byte[] digestBytes = md5Digest.digest();
        System.out.println("Digest is " + Arrays.toString(digestBytes));
    }
}