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