On Wed, 2016-01-13 at 06:05 -0800, Tadeusz Struk wrote:

I agree, ideally keyctl should do the job for all the cases and
request_key() should just return a key data.

No, you can NOT RELY ON HAVING THE KEY DATA. It might be in hardware.
You might have something which will perform sign/verify/encrypt/decrypt
operations *with* the key at your request, but which can never just
*give* you the key.

Any crypto API which relies on *having* the key is fundamentally wrong.

-- 
dwmw2