/* Fill BUFFER with LENGTH bytes of random at quality LEVEL. The
function either succeeds or terminates the process in case of a
fatal error. */
static void
get_random (void *buffer, size_t length, int level)
{
int rc;
gcry_assert (buffer);
read_cb_buffer = buffer;
read_cb_size = length;
read_cb_len = 0;
#if USE_RNDLINUX
rc = _gcry_rndlinux_gather_random (read_cb, 0, length, level);
#elif USE_RNDUNIX
rc = _gcry_rndunix_gather_random (read_cb, 0, length, level);
#elif USE_RNDW32
do
{
rc = _gcry_rndw32_gather_random (read_cb, 0, length, level);
}
while (rc >= 0 && read_cb_len < read_cb_size);
#else
rc = -1;
#endif
if (rc < 0 || read_cb_len != read_cb_size)
{
log_fatal ("error reading random from system RNG (rc=%d)\n", rc);
}
}
/* 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 ();
}
/* Try to close the FDs of the random gather module. This is
currently only implemented for rndlinux. */
void
_gcry_rngcsprng_close_fds (void)
{
lock_pool ();
#if USE_RNDLINUX
_gcry_rndlinux_gather_random (NULL, 0, 0, 0);
pool_filled = 0; /* Force re-open on next use. */
#endif
unlock_pool ();
}
