1 files changed, 43 insertions, 0 deletions
diff --git a/comm/third_party/botan/src/lib/rng/system_rng/system_rng.h b/comm/third_party/botan/src/lib/rng/system_rng/system_rng.h
new file mode 100644
index 0000000000..e0f0181ca1
--- /dev/null
+++ b/comm/third_party/botan/src/lib/rng/system_rng/system_rng.h
@@ -0,0 +1,43 @@
+/*
+* System RNG interface
+* (C) 2014,2015 Jack Lloyd
+*
+* Botan is released under the Simplified BSD License (see license.txt)
+*/
+
+#ifndef BOTAN_SYSTEM_RNG_H_
+#define BOTAN_SYSTEM_RNG_H_
+
+#include <botan/rng.h>
+
+namespace Botan {
+
+/**
+* Return a shared reference to a global PRNG instance provided by the
+* operating system. For instance might be instantiated by /dev/urandom
+* or CryptGenRandom.
+*/
+BOTAN_PUBLIC_API(2,0) RandomNumberGenerator& system_rng();
+
+/*
+* Instantiable reference to the system RNG.
+*/
+class BOTAN_PUBLIC_API(2,0) System_RNG final : public RandomNumberGenerator
+   {
+   public:
+      std::string name() const override { return system_rng().name(); }
+
+      void randomize(uint8_t out[], size_t len) override { system_rng().randomize(out, len); }
+
+      void add_entropy(const uint8_t in[], size_t length) override { system_rng().add_entropy(in, length); }
+
+      bool is_seeded() const override { return system_rng().is_seeded(); }
+
+      bool accepts_input() const override { return system_rng().accepts_input(); }
+
+      void clear() override { system_rng().clear(); }
+   };
+
+}
+
+#endif