DSA_dup_DH(3)

     NAME
          DSA_dup_DH - create a DH structure out of DSA structure

     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 VALUE
          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(3), dsa(3), ERR_get_error(3)

     HISTORY
          DSA_dup_DH() was added in OpenSSL 0.9.4.