MacExample.java

import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;

import org.apache.commons.codec.binary.Hex;

import java.security.Security;

public class MacExample {
    public static void main(String[] args) throws Exception {
        Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
        String message = args[0];
        byte[] secretSymmetricKey = Hex.decodeHex("20f7e4926a4b66c8a32071ff56aedc82".toCharArray());
        Mac aescmac = Mac.getInstance("AESCMAC", "BC");
        SecretKeySpec msgSpec = new SecretKeySpec(secretSymmetricKey, "AES");
        aescmac.init(msgSpec);
        aescmac.update(message.getBytes());
        byte[] mac = aescmac.doFinal();
        System.out.println(Hex.encodeHex(mac));
    }
}