Updated: 2021/Apr/14


DSA_dup_DH(3)                       OpenSSL                      DSA_dup_DH(3)



NAME
       DSA_dup_DH - create a DH structure out of DSA structure

LIBRARY
       libcrypto, -lcrypto

SYNOPSIS
        #include <openssl/dsa.h>

        DH *DSA_dup_DH(const DSA *r);

DESCRIPTION
       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.

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

NOTE
       Be careful to avoid small subgroup attacks when using this.

SEE ALSO
       DH_new(3), DSA_new(3), ERR_get_error(3)

COPYRIGHT
       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>.



1.1.1i                            2018-09-23                     DSA_dup_DH(3)