static int
wrap_nettle_rnd (void *_ctx, int level, void *data, size_t datasize)
{
int ret;
RND_LOCK;
ret = do_trivia_source (0);
if (ret < 0)
{
RND_UNLOCK;
gnutls_assert ();
return ret;
}
ret = do_device_source (0);
if (ret < 0)
{
RND_UNLOCK;
gnutls_assert ();
return ret;
}
yarrow256_random (&yctx, datasize, data);
RND_UNLOCK;
return 0;
}
static int
wrap_nettle_rnd_init (void **ctx)
{
int ret;
ret = gnutls_mutex_init (&rnd_mutex);
if (ret < 0)
{
gnutls_assert ();
return ret;
}
yarrow256_init (&yctx, SOURCES, ysources);
ret = do_device_source (1);
if (ret < 0)
{
gnutls_assert ();
return ret;
}
ret = do_trivia_source (1);
if (ret < 0)
{
gnutls_assert ();
return ret;
}
yarrow256_slow_reseed (&yctx);
return 0;
}
static int wrap_nettle_rnd_init(void **ctx)
{
int ret;
struct event_st event;
uint8_t nonce_key[NONCE_KEY_SIZE];
memset(&rnd_ctx, 0, sizeof(rnd_ctx));
ret = gnutls_mutex_init(&nonce_ctx.mutex);
if (ret < 0) {
gnutls_assert();
return ret;
}
ret = gnutls_mutex_init(&rnd_ctx.mutex);
if (ret < 0) {
gnutls_assert();
return ret;
}
/* initialize the main RNG */
yarrow256_init(&rnd_ctx.yctx, SOURCES, rnd_ctx.ysources);
_rnd_get_event(&event);
rnd_ctx.forkid = _gnutls_get_forkid();
ret = do_device_source(&rnd_ctx, 1, &event);
if (ret < 0) {
gnutls_assert();
return ret;
}
ret = do_trivia_source(&rnd_ctx, 1, &event);
if (ret < 0) {
gnutls_assert();
return ret;
}
yarrow256_slow_reseed(&rnd_ctx.yctx);
/* initialize the nonce RNG */
ret = _rnd_get_system_entropy(nonce_key, sizeof(nonce_key));
if (ret < 0)
return gnutls_assert_val(ret);
ret = nonce_rng_init(&nonce_ctx, nonce_key, sizeof(nonce_key), 1);
if (ret < 0)
return gnutls_assert_val(ret);
return 0;
}
static int
wrap_nettle_rnd(void *_ctx, int level, void *data, size_t datasize)
{
int ret, reseed = 0;
struct event_st event;
if (level == GNUTLS_RND_NONCE)
return wrap_nettle_rnd_nonce(_ctx, data, datasize);
_rnd_get_event(&event);
RND_LOCK(&rnd_ctx);
if (_gnutls_detect_fork(rnd_ctx.forkid)) { /* fork() detected */
memset(&rnd_ctx.device_last_read, 0, sizeof(rnd_ctx.device_last_read));
reseed = 1;
}
/* reseed main */
ret = do_trivia_source(&rnd_ctx, 0, &event);
if (ret < 0) {
gnutls_assert();
goto cleanup;
}
ret = do_device_source(&rnd_ctx, 0, &event);
if (ret < 0) {
gnutls_assert();
goto cleanup;
}
if (reseed != 0) {
yarrow256_slow_reseed(&rnd_ctx.yctx);
rnd_ctx.forkid = _gnutls_get_forkid();
}
yarrow256_random(&rnd_ctx.yctx, datasize, data);
ret = 0;
cleanup:
RND_UNLOCK(&rnd_ctx);
return ret;
}