Botan  2.4.0
Crypto and TLS for C++11
system_rng.h
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1 /*
2 * System RNG interface
3 * (C) 2014,2015 Jack Lloyd
4 *
5 * Botan is released under the Simplified BSD License (see license.txt)
6 */
7 
8 #ifndef BOTAN_SYSTEM_RNG_H_
9 #define BOTAN_SYSTEM_RNG_H_
10 
11 #include <botan/rng.h>
12 
13 namespace Botan {
14 
15 /**
16 * Return a shared reference to a global PRNG instance provided by the
17 * operating system. For instance might be instantiated by /dev/urandom
18 * or CryptGenRandom.
19 */
20 BOTAN_PUBLIC_API(2,0) RandomNumberGenerator& system_rng();
21 
22 /*
23 * Instantiable reference to the system RNG.
24 */
26  {
27  public:
28  std::string name() const override { return system_rng().name(); }
29 
30  void randomize(uint8_t out[], size_t len) override { system_rng().randomize(out, len); }
31 
32  void add_entropy(const uint8_t in[], size_t length) override { system_rng().add_entropy(in, length); }
33 
34  bool is_seeded() const override { return system_rng().is_seeded(); }
35 
36  void clear() override { system_rng().clear(); }
37  };
38 
39 }
40 
41 #endif
RandomNumberGenerator & system_rng()
Definition: system_rng.cpp:230
void add_entropy(const uint8_t in[], size_t length) override
Definition: system_rng.h:32
virtual void add_entropy(const uint8_t input[], size_t length)=0
virtual void randomize(uint8_t output[], size_t length)=0
#define BOTAN_PUBLIC_API(maj, min)
Definition: compiler.h:27
void clear() override
Definition: system_rng.h:36
std::string name() const override
Definition: system_rng.h:28
virtual std::string name() const =0
Definition: alg_id.cpp:13
virtual bool is_seeded() const =0
bool is_seeded() const override
Definition: system_rng.h:34
void randomize(uint8_t out[], size_t len) override
Definition: system_rng.h:30