private static boolean is32BitJvm() {
        Integer bits = Integer.getInteger("sun.arch.data.model");
        return bits != null && bits == 32;
    }
Uses the non-portable system property sun.arch.data.model to help
determine if we are running on a 32-bit JVM. Since the majority of modern
systems are 64 bits, this method "assumes" 64 bits and only returns true
if sun.arch.data.model explicitly indicates a 32-bit JVM.

@return true if we can determine definitively that this is a 32-bit JVM,
        otherwise false
netbare-core/src/main/java/com/github/megatronking/netbare/ssl/CertificateGenerator.java