@deftypefun {gnutls_sign_algorithm_t} {gnutls_pk_to_sign} (gnutls_pk_algorithm_t @var{pk}, gnutls_digest_algorithm_t @var{hash})
@var{pk}: is a public key algorithm
@var{hash}: a hash algorithm
This function maps public key and hash algorithms combinations
to signature algorithms.
@strong{Returns:} return a @code{gnutls_sign_algorithm_t} value, or @code{GNUTLS_SIGN_UNKNOWN} on error.
@end deftypefun