jitter_rng.h - mozsearch

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/*

* CPU Jitter Random Number Generator

* (C) 2024 Planck Security S.A.

* Botan is released under the Simplified BSD License (see license.txt)

*/

#ifndef BOTAN_JITTER_RNG_H_

#define BOTAN_JITTER_RNG_H_

#include <botan/rng.h>

#include <memory>

#include <string>

namespace Botan {

struct Jitter_RNG_Internal;

/*

* RNG using libjitterentropy (https://github.com/smuellerDD/jitterentropy-library).

*/

class BOTAN_PUBLIC_API(3, 6) Jitter_RNG final : public RandomNumberGenerator {

   public:

      Jitter_RNG();

      ~Jitter_RNG();

      std::string name() const override { return "JitterRNG"; }

      bool is_seeded() const override { return true; }

      bool accepts_input() const override { return false; }

      void clear() override;

   private:

      void fill_bytes_with_input(std::span<uint8_t> out, std::span<const uint8_t> in) override;

      std::unique_ptr<Jitter_RNG_Internal> m_jitter;

};

}  // namespace Botan

#endif