/* Try to close the FDs of the random gather module. This is
currently only implemented for rndlinux. */
void
_gcry_rngsystem_close_fds (void)
{
lock_rng ();
#if USE_RNDLINUX
_gcry_rndlinux_gather_random (NULL, 0, 0, 0);
#endif
unlock_rng ();
}
/* Public function to fill the buffer with LENGTH bytes of
cryptographically strong random bytes. Level GCRY_WEAK_RANDOM is
here mapped to GCRY_STRONG_RANDOM, GCRY_STRONG_RANDOM is strong
enough for most usage, GCRY_VERY_STRONG_RANDOM is good for key
generation stuff but may be very slow. */
void
_gcry_rngsystem_randomize (void *buffer, size_t length,
enum gcry_random_level level)
{
_gcry_rngsystem_initialize (1); /* Auto-initialize if needed. */
if (level != GCRY_VERY_STRONG_RANDOM)
level = GCRY_STRONG_RANDOM;
lock_rng ();
get_random (buffer, length, level);
unlock_rng ();
}