@deftypefun {int} {gnutls_hex_decode2} (const gnutls_datum_t * @var{hex_data}, gnutls_datum_t * @var{result})
@var{hex_data}: contain the encoded data

@var{result}: the result in an allocated string

This function will decode the given encoded data, using the hex
encoding used by PSK password files.

@strong{Returns:} @code{GNUTLS_E_PARSING_ERROR}  on invalid hex data, or 0 on success.
@end deftypefun