auto_rng.h

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/*
* Auto Seeded RNG
* (C) 2008 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
 
#ifndef BOTAN_AUTO_SEEDING_RNG_H__
#define BOTAN_AUTO_SEEDING_RNG_H__
 
#include <botan/rng.h>
#include <botan/libstate.h>
#include <string>
 
namespace Botan {
 
/**
* An automatically seeded PRNG
*/
class BOTAN_DLL AutoSeeded_RNG : public RandomNumberGenerator
   {
   public:
      void randomize(byte out[], size_t len)
         { rng->randomize(out, len); }
 
      bool is_seeded() const { return rng->is_seeded(); }
 
      void clear() { rng->clear(); }
 
      std::string name() const { return rng->name(); }
 
      void reseed(size_t poll_bits = 256) { rng->reseed(poll_bits); }
 
      void add_entropy_source(EntropySource* es)
         { rng->add_entropy_source(es); }
 
      void add_entropy(const byte in[], size_t len)
         { rng->add_entropy(in, len); }
 
      AutoSeeded_RNG() { rng = &global_state().global_rng(); }
   private:
      RandomNumberGenerator* rng;
   };
 
}
 
#endif