@item @var{int} @ref{gnutls_openpgp_privkey_export} (gnutls_openpgp_privkey_t @var{key}, gnutls_openpgp_crt_fmt_t @var{format}, const char * @var{password}, unsigned int @var{flags}, void * @var{output_data}, size_t * @var{output_data_size})
