/// <summary>
/// Factory method that calls XXX() to deserialize
/// a DH object from a DER-formatted buffer using the BIO interface.
/// </summary>
/// <param name="bio"></param>
/// <returns></returns>
public static DH FromParametersDER(BIO bio)
{
DH_new_delegate dh_new = new DH_new_delegate(Managed_DH_new);
d2i_DHparams_delegate d2i_DHparams = new d2i_DHparams_delegate(Managed_d2i_DHparams);
IntPtr dh_new_ptr = Marshal.GetFunctionPointerForDelegate(dh_new);
IntPtr d2i_DHparams_ptr = Marshal.GetFunctionPointerForDelegate(d2i_DHparams);
IntPtr ptr = Native.ExpectNonNull(Native.ASN1_d2i_bio(dh_new_ptr, d2i_DHparams_ptr, bio.Handle, IntPtr.Zero));
DH dh = new DH(ptr, true);
return(dh);
}