Return the base EVP_PKEY type id for pkey (for example EVP_PKEY_RSA).
pkey
Declared in <openssl/evp.h>
<openssl/evp.h>
int EVP_PKEY_get_base_id(EVP_PKEY const* pkey);
EVP_PKEY_* type constant, or EVP_PKEY_NONE if unset.