[kmf-discuss] Create and Store Key APIs

[Wyllys Ingersoll]

I've had a look at the code and based on Max's suggestions, I think
some fixes are needed.

#1 - It should be optional for CreateKeypair to actually store the
     keys in the keystore as they are created.  The alternative is
     to just create them in memory and let the caller store them
     later.

#2 - #1 leads to another problem, we don't have separate APIs for
     storing keys.  We have a KMF_StorePrivateKey() function, but
     it is only for raw asymmetric Private keys, it won't work with
     a standard KMF_KEY_HANDLE nor will it work with public keys.
     I think we need a KMF_StoreKey() API that looks like this:
     KMF_RETURN
	KMF_StoreKey(KMF_HANDLE_T kmfhandle,
		KMF_STOREKEY_PARAMS *params,
		KMF_KEY_HANDLE *kmfkey);

     This could be used to store public or private keys in any of the
     supported keystores.

Fixing these 2 issues would allow a program to create keys in memory
and store them later.

#3 - KMF_StorePrivateKey() should probably go away or perhaps
     be renamed KMF_StoreRawPrivateKey to make it clear that it has
     a very specific usage.

Thoughts ?

- Wyllys