L<EVP_CipherInit_ex(3)>, the actual implementation to be used is
fetched implicitly using default search criteria.
-Implicit fetching can also occur with functions such as
-L<EVP_PKEY_derive_init_ex(3)> where a NULL algorithm parameter is
+Implicit fetching can also occur when a NULL algorithm parameter is
supplied.
In this case an algorithm implementation is implicitly fetched using
default search criteria and an algorithm name that is consistent with
=head1 SEE ALSO
L<EVP_DigestInit_ex(3)>, L<EVP_EncryptInit_ex(3)>,
-L<EVP_PKEY_derive_init_ex(3)>,
L<OPENSSL_CTX(3)>,
L<EVP_set_default_properties(3)>,
L<EVP_MD_fetch(3)>,