Function AddDataToRng

src/random.cpp:302–316

static uint64_t rng_counter = 0;

static void AddDataToRng(void* data, size_t len) {
    CSHA512 hasher;
    hasher.Write((const unsigned char*)&len, sizeof(len));
    hasher.Write((const unsigned char*)data, len);
    unsigned char buf[64];
    {
        std::unique_lock<std::mutex> lock(cs_rng_state);
        hasher.Write(rng_state, sizeof(rng_state));
        hasher.Write((const unsigned char*)&rng_counter, sizeof(rng_counter));
        ++rng_counter;
        hasher.Finalize(buf);
        memcpy(rng_state, buf + 32, 32);
    }
    memory_cleanse(buf, 64);
}

void GetStrongRandBytes(unsigned char* out, int num)
{