@deftypefun {void} {gnutls_pkcs11_privkey_set_pin_function} (gnutls_pkcs11_privkey_t @var{key}, gnutls_pin_callback_t @var{fn}, void * @var{userdata})
@var{key}: The private key

@var{fn}: the callback

@var{userdata}: data associated with the callback

This function will set a callback function to be used when
required to access the object. This function overrides the global
set using @code{gnutls_pkcs11_set_pin_function()} .

@strong{Since:} 3.1.0
@end deftypefun