1 files changed, 70 insertions, 0 deletions
diff --git a/comm/third_party/botan/src/lib/prov/pkcs11/p11_randomgenerator.h b/comm/third_party/botan/src/lib/prov/pkcs11/p11_randomgenerator.h
new file mode 100644
index 0000000000..339cb95a5c
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+++ b/comm/third_party/botan/src/lib/prov/pkcs11/p11_randomgenerator.h
@@ -0,0 +1,70 @@
+/*
+* PKCS#11 Random Generator
+* (C) 2016 Daniel Neus, Sirrix AG
+* (C) 2016 Philipp Weber, Sirrix AG
+*
+* Botan is released under the Simplified BSD License (see license.txt)
+*/
+
+#ifndef BOTAN_P11_RNG_H_
+#define BOTAN_P11_RNG_H_
+
+#include <botan/rng.h>
+#include <botan/p11_types.h>
+#include <botan/entropy_src.h>
+
+#include <string>
+#include <functional>
+
+namespace Botan {
+namespace PKCS11 {
+
+class Module;
+
+/// A random generator that only fetches random from the PKCS#11 RNG
+class BOTAN_PUBLIC_API(2,0) PKCS11_RNG final : public Hardware_RNG
+   {
+   public:
+      /// Initialize the RNG with the PKCS#11 session that provides access to the cryptoki functions
+      explicit PKCS11_RNG(Session& session);
+
+      std::string name() const override
+         {
+         return "PKCS11_RNG";
+         }
+
+      /// Always returns true
+      bool is_seeded() const override
+         {
+         return true;
+         }
+
+      /// No operation - always returns 0
+      size_t reseed(Entropy_Sources&, size_t, std::chrono::milliseconds) override
+         {
+         return 0;
+         }
+
+      /// @return the module used by this RNG
+      inline Module& module() const
+         {
+         return m_session.get().module();
+         }
+
+      /// Calls `C_GenerateRandom` to generate random data
+      void randomize(uint8_t output[], std::size_t length) override;
+
+      /// Calls `C_SeedRandom` to add entropy to the random generation function of the token/middleware
+      void add_entropy(const uint8_t in[], std::size_t length) override;
+
+      // C_SeedRandom may suceed
+      bool accepts_input() const override { return true; }
+
+   private:
+      const std::reference_wrapper<Session> m_session;
+   };
+}
+
+}
+
+#endif