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// Copyright 2014 The Chromium 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 CHROME_BROWSER_METRICS_CLONED_INSTALL_DETECTOR_H_
#define CHROME_BROWSER_METRICS_CLONED_INSTALL_DETECTOR_H_
#include "base/gtest_prod_util.h"
#include "base/memory/ref_counted.h"
#include "base/memory/weak_ptr.h"
class PrefRegistrySimple;
class PrefService;
namespace metrics {
class MachineIdProvider;
// A class for detecting if an install is cloned. It does this by detecting
// when the hardware running Chrome changes.
class ClonedInstallDetector {
public:
explicit ClonedInstallDetector(MachineIdProvider* raw_id_provider);
virtual ~ClonedInstallDetector();
// Posts a task to generate a machine ID and store it to a local state pref.
// If the newly generated ID is different than the previously stored one, then
// the install is considered cloned. The ID is a 24-bit value based off of
// machine characteristics. This value should never be sent over the network.
// TODO(jwd): Implement change detection.
void CheckForClonedInstall(PrefService* local_state);
static void RegisterPrefs(PrefRegistrySimple* registry);
private:
FRIEND_TEST_ALL_PREFIXES(ClonedInstallDetectorTest, SaveId);
FRIEND_TEST_ALL_PREFIXES(ClonedInstallDetectorTest, DetectClone);
// Converts raw_id into a 24-bit hash and stores the hash in |local_state|.
// |raw_id| is not a const ref because it's passed from a cross-thread post
// task.
void SaveMachineId(PrefService* local_state, std::string raw_id);
scoped_refptr<MachineIdProvider> raw_id_provider_;
base::WeakPtrFactory<ClonedInstallDetector> weak_ptr_factory_;
DISALLOW_COPY_AND_ASSIGN(ClonedInstallDetector);
};
} // namespace metrics
#endif // CHROME_BROWSER_METRICS_CLONED_INSTALL_DETECTOR_H_
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