![Dr. Stephen Henson](/assets/img/avatar_default.png)
value of the passed output buffer is NULL. The old method of using EVP_PKEY_size(pkey) isn't flexible enough to cover all cases where the output length may depend on the operation or the parameters associated with it.
The stuff in here is based on patches supplied to me by Steven Schoch <schoch@sheba.arc.nasa.gov> to do DSS. I have since modified a them a little but a debt of gratitude is due for doing the initial work.