DSA_dup_DH.3ssl man page

 #include <openssl/dsa.h>

 DH *DSA_dup_DH(const DSA *r);

DSA_dup_DH() duplicates DSA parameters/keys as DH parameters/keys. q is lost during that conversion, but the resulting DH parameters contain its length.

DSA_dup_DH() returns the new DH structure, and NULL on error. The error codes can be obtained by ERR_get_error(3).

Be careful to avoid small subgroup attacks when using this.

DH_new(3), DSA_new(3), ERR_get_error(3)

Copyright 2000-2018 The OpenSSL Project Authors. All Rights Reserved.

Licensed under the OpenSSL license (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>.

DSA_get0_pqg.3ssl(3), DSA_meth_new.3ssl(3).