private void writeLittleEndianLong(ByteArrayOutputStream baos, long value) {
        for (int i = 0; i < 8; i++) {
            baos.write((int) ((value >> (i * 8)) & 0xFF));
        }
    }

    @Test
    void testEmptyPac() {
        // Test that PAC with size <= 8 is rejected
        byte[] emptyData = new byte[8];

        PACDecodingException e = assertThrows(PACDecodingException.class, () -> new Pac(emptyData, keys));