@deftypefun {int} {gnutls_tpm_key_list_get_url} (gnutls_tpm_key_list_t @var{list}, unsigned int @var{idx}, char ** @var{url}, unsigned int @var{flags})
@var{list}: a list of the keys

@var{idx}: The index of the key (starting from zero)

@var{url}: The URL to be returned

@var{flags}: should be zero

This function will return for each given index a URL of
the corresponding key.
If the provided index is out of bounds then @code{GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE} 
is returned.

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

@strong{Since:} 3.1.0
@end deftypefun