// Test AES128
        byte[] mac2 = PacMac.calculateMac(PacSignature.HMAC_SHA1_96_AES128, keys, TEST_DATA);
        assertNotNull(mac2);
        assertEquals(12, mac2.length);

        // Test AES256
        byte[] mac3 = PacMac.calculateMac(PacSignature.HMAC_SHA1_96_AES256, keys, TEST_DATA);
        assertNotNull(mac3);
        assertEquals(12, mac3.length);
    }

    /**