@item @var{int} @ref{gnutls_x509_privkey_export_pkcs8} (gnutls_x509_privkey_t @var{key}, gnutls_x509_crt_fmt_t @var{format}, const char * @var{password}, unsigned int @var{flags}, void * @var{output_data}, size_t * @var{output_data_size})
