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- =pod
- =head1 NAME
- DSA_dup_DH - create a DH structure out of DSA structure
- =head1 SYNOPSIS
- #include <openssl/dsa.h>
- DH * DSA_dup_DH(const 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<DH> structure, and NULL on error. The
- error codes can be obtained by L<ERR_get_error(3)|ERR_get_error(3)>.
- =head1 NOTE
- Be careful to avoid small subgroup attacks when using this.
- =head1 SEE ALSO
- L<dh(3)|dh(3)>, L<dsa(3)|dsa(3)>, L<ERR_get_error(3)|ERR_get_error(3)>
- =head1 HISTORY
- DSA_dup_DH() was added in OpenSSL 0.9.4.
- =cut
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