Otherwise these behave in a similar way to d2i_X509() and i2d_X509()
described in the L<d2i_X509(3)> manual page.
+=head1 RETURN VALUES
+
+d2i_DHparams() returns a valid B<DH> structure or NULL if an error occurred.
+
+i2d_DHparams() returns the length of encoded data on success or a value which
+is less than or equal to 0 on error.
+
=head1 SEE ALSO
L<d2i_X509(3)>
=head1 COPYRIGHT
-Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.
+Copyright 2000-2018 The OpenSSL Project Authors. All Rights Reserved.
-Licensed under the OpenSSL license (the "License"). You may not use
+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
in the file LICENSE in the source distribution or at
L<https://www.openssl.org/source/license.html>.