Add internal method to add new random data to our internal RNG state
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1 changed files with 16 additions and 0 deletions
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@ -207,6 +207,22 @@ static std::mutex cs_rng_state;
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static unsigned char rng_state[32] = {0};
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static uint64_t rng_counter = 0;
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static void AddDataToRng(void* data, size_t len) {
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CSHA512 hasher;
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hasher.Write((const unsigned char*)&len, sizeof(len));
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hasher.Write((const unsigned char*)data, len);
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unsigned char buf[64];
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{
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std::unique_lock<std::mutex> lock(cs_rng_state);
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hasher.Write(rng_state, sizeof(rng_state));
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hasher.Write((const unsigned char*)&rng_counter, sizeof(rng_counter));
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++rng_counter;
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hasher.Finalize(buf);
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memcpy(rng_state, buf + 32, 32);
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}
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memory_cleanse(buf, 64);
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}
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void GetStrongRandBytes(unsigned char* out, int num)
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{
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assert(num <= 32);
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