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.\" ========================================================================
.\"
.IX Title "DH_NEW_BY_NID 3"
.TH DH_NEW_BY_NID 3 "2023-09-11" "1.1.1w" "OpenSSL"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
DH_new_by_nid, DH_get_nid \- get or find DH named parameters
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 3
\& #include <openssl/dh.h>
\& DH *DH_new_by_nid(int nid);
\& int *DH_get_nid(const DH *dh);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\fBDH_new_by_nid()\fR creates and returns a \s-1DH\s0 structure containing named parameters
\&\fBnid\fR. Currently \fBnid\fR must be \fBNID_ffdhe2048\fR, \fBNID_ffdhe3072\fR,
\&\fBNID_ffdhe4096\fR, \fBNID_ffdhe6144\fR or \fBNID_ffdhe8192\fR.
.PP
\&\fBDH_get_nid()\fR determines if the parameters contained in \fBdh\fR match
any named set. It returns the \s-1NID\s0 corresponding to the matching parameters or
\&\fBNID_undef\fR if there is no match.
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
\&\fBDH_new_by_nid()\fR returns a set of \s-1DH\s0 parameters or \fB\s-1NULL\s0\fR if an error occurred.
.PP
\&\fBDH_get_nid()\fR returns the \s-1NID\s0 of the matching set of parameters or
\&\fBNID_undef\fR if there is no match.
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2017 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the OpenSSL license (the \*(L"License\*(R").  You may not use
this file except in compliance with the License.  You can obtain a copy
in the file \s-1LICENSE\s0 in the source distribution or at
<https://www.openssl.org/source/license.html>.