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@ -32,9 +32,12 @@ namespace {
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class RandomBytes
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{
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public:
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RandomBytes() : rd(), rng(rd()), dist(0, 255)
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RandomBytes() : rng(s), dist(0, 255)
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{
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uv_mutex_init_checked(&m);
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// Diffuse the initial state in case it has low quality
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rng.discard(10000);
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}
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~RandomBytes()
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@ -54,7 +57,22 @@ public:
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private:
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uv_mutex_t m;
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std::random_device rd;
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// Fills the whole initial MT19937-64 state with non-deterministic random numbers
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struct SeedSequence
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{
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using result_type = std::random_device::result_type;
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template<typename T>
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static void generate(T begin, T end)
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{
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std::random_device rd;
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for (T i = begin; i != end; ++i) {
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*i = rd();
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}
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}
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};
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SeedSequence s;
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std::mt19937_64 rng;
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std::uniform_int_distribution<> dist;
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};
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