TRNG_SEED_LEN_BYTES
static_assert(sizeof(entropy) >= TRNG_SEED_LEN_BYTES);
ret = xtrng_collect_random_data(rng, entropy, TRNG_SEED_LEN_BYTES, true);
if (ret != TRNG_SEED_LEN_BYTES)
TRNG_SEED_LEN_BYTES, entropy);