@deftypefun {size_t} {gnutls_mac_get_key_size} (gnutls_mac_algorithm_t @var{algorithm})

@var{algorithm}: is an encryption algorithm

Returns the size of the MAC key used in TLS.

@strong{Returns:} length (in bytes) of the given MAC key size, or 0 if the

given MAC algorithm is invalid.

@end deftypefun