PolicyManager: Add a random number provider.
This patch adds a new provider with a single variable that returns a
random value from /dev/urandom every time it is called. The variable
is exported to all the policy implementations (currently none) in the
policy_manager/all_variables.h file.
BUG=None
TEST=unittests.
Change-Id: I6efdecd0f37f1a706b5a0dfd3a77ac4205e35aa0
Reviewed-on: https://chromium-review.googlesource.com/181537
Reviewed-by: Gilad Arnold <garnold@chromium.org>
Commit-Queue: Alex Deymo <deymo@chromium.org>
Tested-by: Alex Deymo <deymo@chromium.org>
diff --git a/policy_manager/random_provider.h b/policy_manager/random_provider.h
new file mode 100644
index 0000000..7c7bae9
--- /dev/null
+++ b/policy_manager/random_provider.h
@@ -0,0 +1,30 @@
+// Copyright (c) 2014 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROMEOS_PLATFORM_UPDATE_ENGINE_PM_RANDOM_PROVIDER_H
+#define CHROMEOS_PLATFORM_UPDATE_ENGINE_PM_RANDOM_PROVIDER_H
+
+#include "base/basictypes.h"
+
+namespace chromeos_policy_manager {
+
+// Provider of random values.
+class RandomProvider {
+ public:
+ RandomProvider() {}
+
+ // Initialize the provider variables and internal state. Returns whether it
+ // succeeded.
+ bool Init();
+
+ // Destroy all the provider variables in a best-effor approach.
+ void Finalize();
+
+ private:
+ DISALLOW_COPY_AND_ASSIGN(RandomProvider);
+};
+
+} // namespace chromeos_policy_manager
+
+#endif // CHROMEOS_PLATFORM_UPDATE_ENGINE_PM_RANDOM_PROVIDER_H