Re: Detecting whether an algorithm is supported without creating one?

[Bradford Wetmore]

On 12/11/2014 8:02 PM, Weijun Wang wrote:

I'd like to check if "SHA-256" is supported without calling
MessageDigest.getInstance("SHA-256"). Does such a method exist?

Not that I'm aware of.

Brad

My case is a multi-thread digestor like this:

class Digestor {
    Digestor(String alg) throws NSAE;
    @ThreadSafe byte[] digest(byte[]) throws Nothing;
}

So a Digestor is created and multiple threads can call the digest()
method. I would be glad if the constructor can throw an NSAE but not
creating a MessageDigest object because I don't know how to safely use
it inside digest().

Thanks
Max