blob: c38e05254ea8c926260ba9f240f24726e16299ba [file] [log] [blame]
// 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.
#include "base/gtest_prod_util.h"
#include "base/macros.h"
#include "base/memory/weak_ptr.h"
class PrefRegistrySimple;
class PrefService;
namespace metrics {
// A class for detecting if an install is cloned. It does this by detecting
// when the hardware running Chrome changes.
class ClonedInstallDetector {
virtual ~ClonedInstallDetector();
// Posts a task to |task_runner| 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.
void CheckForClonedInstall(PrefService* local_state);
static void RegisterPrefs(PrefRegistrySimple* registry);
// Returns true for the whole session if we detected a cloned install during
// the construction of a client id.
bool ShouldResetClientIds(PrefService* local_state);
// Returns true for the whole session if we detect a cloned install this
// session.
bool ClonedInstallDetectedInCurrentSession() const;
FRIEND_TEST_ALL_PREFIXES(ClonedInstallDetectorTest, SaveId);
FRIEND_TEST_ALL_PREFIXES(ClonedInstallDetectorTest, DetectClone);
FRIEND_TEST_ALL_PREFIXES(ClonedInstallDetectorTest, ShouldResetClientIds);
FRIEND_TEST_ALL_PREFIXES(MetricsStateManagerTest, CheckProviderResetIds);
// 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, const std::string& raw_id);
// Indicates that we detected a cloned install during the current session.
bool detected_this_session_ = false;
// Indicates that we detected a cloned install during the construction of a
// client id and should reset client ids as a result.
bool should_reset_client_ids_ = false;
base::WeakPtrFactory<ClonedInstallDetector> weak_ptr_factory_{this};
} // namespace metrics