doc: document the rsa_oaep_md: pkeyopt
This was missing but essential for using non-SHA1 digests with OAEP.
Fixes
@@ -262,6 +262,11 @@ B<PSS> block structure.
For PSS and OAEP padding sets the MGF1 digest. If the MGF1 digest is not
explicitly set in PSS mode then the signing digest is used.
+=item B<rsa_oaep_md:>I<digest>
+
+Sets the digest used for the OAEP hash function. If not explicitly set then
+SHA1 is used.
+
=back
=head1 RSA-PSS ALGORITHM
@@ -391,6 +396,11 @@ Verify some data using an L<SM2(7)> certificate and a specific ID:
openssl pkeyutl -verify -certin -in file -inkey sm2.cert -sigfile sig \
-rawin -digest sm3 -pkeyopt distid:someid
+Decrypt some data using a private key with OAEP padding using SHA256:
+
+ openssl pkeyutl -decrypt -in file -inkey key.pem -out secret \
+ -pkeyopt rsa_padding_mode:oaep -pkeyopt rsa_oaep_md:sha256
+
=head1 SEE ALSO
L<openssl(1)>,
