@deftypefun {const char *} {gnutls_sign_get_oid} (gnutls_sign_algorithm_t @var{sign})
@var{sign}: is a sign algorithm

Convert a @code{gnutls_sign_algorithm_t}  value to its object identifier.

@strong{Returns:} a string that contains the object identifier of the specified sign
algorithm, or @code{NULL} .

@strong{Since:} 3.4.3
@end deftypefun