5 DH_new_by_nid, DH_get_nid - create or get DH named parameters
9 #include <openssl/dh.h>
10 DH *DH_new_by_nid(int nid);
12 Deprecated since OpenSSL 3.0, can be hidden entirely by defining
13 B<OPENSSL_API_COMPAT> with a suitable version value, see
14 L<openssl_user_macros(7)>:
16 int DH_get_nid(const DH *dh);
20 DH_new_by_nid() creates and returns a DH structure containing named parameters
21 B<nid>. Currently B<nid> must be B<NID_ffdhe2048>, B<NID_ffdhe3072>,
22 B<NID_ffdhe4096>, B<NID_ffdhe6144>, B<NID_ffdhe8192>,
23 B<NID_modp_1536>, B<NID_modp_2048>, B<NID_modp_3072>,
24 B<NID_modp_4096>, B<NID_modp_6144> or B<NID_modp_8192>.
26 DH_get_nid() determines if the parameters contained in B<dh> match
27 any named safe prime group. It returns the NID corresponding to the matching
28 parameters or B<NID_undef> if there is no match.
29 This function is deprecated.
33 DH_new_by_nid() returns a set of DH parameters or B<NULL> if an error occurred.
35 DH_get_nid() returns the NID of the matching set of parameters for p and g
36 and optionally q, otherwise it returns B<NID_undef> if there is no match.
40 The DH_get_nid() function was deprecated in OpenSSL 3.0.
44 Copyright 2017-2020 The OpenSSL Project Authors. All Rights Reserved.
46 Licensed under the Apache License 2.0 (the "License"). You may not use
47 this file except in compliance with the License. You can obtain a copy
48 in the file LICENSE in the source distribution or at
49 L<https://www.openssl.org/source/license.html>.