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/*
* Auto Seeded RNG
* (C) 2008 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#ifndef BOTAN_AUTO_SEEDING_RNG_H__
#define BOTAN_AUTO_SEEDING_RNG_H__
#include <botan/rng.h>
namespace Botan {
class BOTAN_DLL AutoSeeded_RNG final : public RandomNumberGenerator
{
public:
void randomize(byte out[], size_t len) override;
void randomize_with_input(byte output[], size_t output_len,
const byte input[], size_t input_len) override;
bool is_seeded() const override { return m_rng->is_seeded(); }
void clear() override { m_rng->clear(); m_counter = 0; }
std::string name() const override { return m_rng->name(); }
size_t reseed_with_sources(Entropy_Sources& srcs,
size_t poll_bits,
std::chrono::milliseconds poll_timeout) override
{
return m_rng->reseed_with_sources(srcs, poll_bits, poll_timeout);
}
void add_entropy(const byte in[], size_t len) override
{ m_rng->add_entropy(in, len); }
AutoSeeded_RNG(size_t bytes_before_reseed = BOTAN_RNG_MAX_OUTPUT_BEFORE_RESEED);
private:
std::unique_ptr<RandomNumberGenerator> m_rng;
uint32_t m_counter = 0;
};
}
#endif
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