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DH_new_by_nid(3)                    OpenSSL                   DH_new_by_nid(3)



NAME
       DH_new_by_nid, DH_get_nid - create or get DH named parameters

LIBRARY
       libcrypto, -lcrypto

SYNOPSIS
        #include <openssl/dh.h>

       The following functions have been deprecated since OpenSSL 3.0, and can
       be hidden entirely by defining OPENSSL_API_COMPAT with a suitable
       version value, see openssl_user_macros(7):

        DH *DH_new_by_nid(int nid);

        int DH_get_nid(const DH *dh);

DESCRIPTION
       DH_new_by_nid() creates and returns a DH structure containing named
       parameters nid. Currently nid must be NID_ffdhe2048, NID_ffdhe3072,
       NID_ffdhe4096, NID_ffdhe6144, NID_ffdhe8192, NID_modp_1536,
       NID_modp_2048, NID_modp_3072, NID_modp_4096, NID_modp_6144 or
       NID_modp_8192.

       DH_get_nid() determines if the parameters contained in dh match any
       named safe prime group. It returns the NID corresponding to the
       matching parameters or NID_undef if there is no match.  This function
       is deprecated.

RETURN VALUES
       DH_new_by_nid() returns a set of DH parameters or NULL if an error
       occurred.

       DH_get_nid() returns the NID of the matching set of parameters for p
       and g and optionally q, otherwise it returns NID_undef if there is no
       match.

HISTORY
       All of these functions were deprecated in OpenSSL 3.0.

COPYRIGHT
       Copyright 2017-2022 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
       <https://www.openssl.org/source/license.html>.



3.0.12                            2023-05-07                  DH_new_by_nid(3)