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=pod
=head1 NAME
DH_new_by_nid, DH_get_nid - get or find DH named parameters
=head1 SYNOPSIS
#include <openssl/dh.h>
DH *DH_new_by_nid(int nid);
int *DH_get_nid(const DH *dh);
=head1 DESCRIPTION
DH_new_by_nid() creates and returns a DH structure containing named parameters
B<nid>. Currently B<nid> must be B<NID_ffdhe2048>, B<NID_ffdhe3072>,
B<NID_ffdhe4096>, B<NID_ffdhe6144> or B<NID_ffdhe8192>.
DH_get_nid() determines if the parameters contained in B<dh> match
any named set. It returns the NID corresponding to the matching parameters or
B<NID_undef> if there is no match.
=head1 RETURN VALUES
DH_new_by_nid() returns a set of DH parameters or B<NULL> if an error occurred.
DH_get_nid() returns the NID of the matching set of parameters or
B<NID_undef> if there is no match.
=head1 COPYRIGHT
Copyright 2017 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
in the file LICENSE in the source distribution or at
L<https://www.openssl.org/source/license.html>.
=cut
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