=back
+=head1 NOTES
+
+Developers should be aware of the negative performance implications of
+calling these functions multiple times and should consider using
+L<EVP_MD_fetch(3)> with L<EVP_MD-SHA2(7)>instead.
+See L<crypto(7)/Performance> for further information.
=head1 RETURN VALUES
These functions return a B<EVP_MD> structure that contains the
-implementation of the symmetric cipher. See L<EVP_MD_meth_new(3)> for
+implementation of the message digest. See L<EVP_MD_meth_new(3)> for
details of the B<EVP_MD> structure.
=head1 CONFORMING TO
=head1 COPYRIGHT
-Copyright 2017-2018 The OpenSSL Project Authors. All Rights Reserved.
+Copyright 2017-2023 The OpenSSL Project Authors. All Rights Reserved.
Licensed under the Apache License 2.0 (the "License"). You may not use
this file except in compliance with the License. You can obtain a copy