1=pod
2
3=head1 NAME
4
5DSA_dup_DH - create a DH structure out of DSA structure
6
7=head1 SYNOPSIS
8
9 #include <openssl/dsa.h>
10
11 DH * DSA_dup_DH(const DSA *r);
12
13=head1 DESCRIPTION
14
15DSA_dup_DH() duplicates DSA parameters/keys as DH parameters/keys. q
16is lost during that conversion, but the resulting DH parameters
17contain its length.
18
19=head1 RETURN VALUE
20
21DSA_dup_DH() returns the new B<DH> structure, and NULL on error. The
22error codes can be obtained by L<ERR_get_error(3)|ERR_get_error(3)>.
23
24=head1 NOTE
25
26Be careful to avoid small subgroup attacks when using this.
27
28=head1 SEE ALSO
29
30L<dh(3)|dh(3)>, L<dsa(3)|dsa(3)>, L<ERR_get_error(3)|ERR_get_error(3)>
31
32=head1 HISTORY
33
34DSA_dup_DH() was added in OpenSSL 0.9.4.
35
36=cut
37