=pod =head1 NAME DSA_dup_DH - Create a DH structure out of DSA structure =head1 SYNOPSIS #include DH * DSA_dup_DH(DSA *r); =head1 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. =head1 RETURN VALUE DSA_dup_DH() returns the new B structure, and NULL on error. The error codes can be obtained by L. =head1 NOTE Be careful to avoid small subgroup attacks when using this. =head1 SEE ALSO L, L, L =head1 HISTORY DSA_dup_DH() was added in OpenSSL 0.9.4. =cut