On 12/15/2015 03:09 AM, Wang Weijun wrote:
Good.

But the builder will not provide default values so you will see

   new DrbgParameters.Builder().build().getAlgorithm() == null

which means the getters still return requested values.

That's fine, this is no different than what the current class does.

--Sean

In this case, the algorithm will only be known after it is used for a specific 
DRBG, for example, SHA-256 for HashDRBG, and AES-256 for CtrDRBG.

--Max

On Dec 15, 2015, at 12:05 AM, Sean Mullan <sean.mul...@oracle.com> wrote:

The DrbgParameters class has 7 parameters, most of which are optional. A 
typical use case might involve lots of null parameters:

DrbgParameters params = new DrbgParameters(null, null, 256, false, false, 
nonce, null);

That seems awkward, and you have be overly careful to map the right value to 
each parameter.

I think this is a case where a DrbgParameters.Builder would be very useful.

--Sean

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