Re: create Digest by name

There's org.bouncycastle.jcajce.provider.util.DigestFactory - it might
be more general than you want though, so you might still want to
implement your own based on it.

Regards,

David

On 9/3/19 11:31 pm, Hohwiller, Jörg wrote:
> Hi there,
>
> I am looking for a way how to create a BC Digest by name. It seems this
> use-case is not addressed. I can create a MessageDigest with BC Provider
> by name but can not unwrap it via official API.
>
> However, I want to create an ECDSASigner with a HMacDSAKCalculator and
> that requires a BC Digest. It seems that due to design flaws and
> limitations of JCE there is a partial mess what can be done via official
> Java APIs and what has to be done via BC proprietary APIs and in such
> case this makes it unnecessary difficult.
>
> Of course I could use reflection hacks or put an own class in your
> org.bouncycastle.jcajce.provider.digest package to unwrap the Digest
> from BCMessageDigest but this does not seem to be a reliable or elegant
> way.
>
> Otherwise I might end up with some ugly switch case statement that then
> is very unflexible for digest algorithms I have not covered in my code
> (that may be even added in the future without me maintaining the code).
>
> Any ideas how to solve this properly? What am I missing?
>
> Thank you so much
>
>   Jörg
>
>
>