@deftypefun {int} {gnutls_privkey_export_x509} (gnutls_privkey_t @var{pkey}, gnutls_x509_privkey_t * @var{key})
@var{pkey}: The private key

@var{key}: Location for the key to be exported.

Converts the given abstract private key to a @code{gnutls_x509_privkey_t} 
type. The abstract key must be of type @code{GNUTLS_PRIVKEY_X509} . The input
 @code{key} must not be initialized. The key returned in  @code{key} should be deinitialized
using @code{gnutls_x509_privkey_deinit()} .

@strong{Returns:} On success, @code{GNUTLS_E_SUCCESS}  (0) is returned, otherwise a
negative error value.

@strong{Since:} 3.4.0
@end deftypefun