blob: 26bc3e640258421d95fbf9eac8bc8331663ade2f (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
|
// Copyright (c) 2010 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_POLICY_CONFIGURATION_POLICY_PROVIDER_WIN_H_
#define CHROME_BROWSER_POLICY_CONFIGURATION_POLICY_PROVIDER_WIN_H_
#pragma once
#include "base/object_watcher.h"
#include "base/ref_counted.h"
#include "base/scoped_ptr.h"
#include "base/waitable_event.h"
#include "base/weak_ptr.h"
#include "chrome/browser/policy/configuration_policy_store.h"
#include "chrome/browser/policy/configuration_policy_provider.h"
namespace base {
namespace win {
class RegKey;
} // namespace win
} // namespace base
namespace policy {
// An implementation of |ConfigurationPolicyProvider| using the
// mechanism provided by Windows Groups Policy. Policy decisions are
// stored as values in a special section of the Windows Registry.
// On a managed machine in a domain, this portion of the registry is
// periodically updated by the Windows Group Policy machinery to contain
// the latest version of the policy set by administrators.
class ConfigurationPolicyProviderWin
: public ConfigurationPolicyProvider,
public base::SupportsWeakPtr<ConfigurationPolicyProviderWin> {
public:
// Keeps watch on Windows Group Policy notification event to trigger a policy
// reload when Group Policy changes. This class is reference counted to
// facilitate timer-based reloads through the message loop. It is not safe to
// access GroupPolicyChangeWatcher concurrently from multiple threads.
class GroupPolicyChangeWatcher
: public base::ObjectWatcher::Delegate,
public MessageLoop::DestructionObserver,
public base::RefCountedThreadSafe<GroupPolicyChangeWatcher> {
public:
GroupPolicyChangeWatcher(
base::WeakPtr<ConfigurationPolicyProviderWin> provider,
int reload_interval_minutes);
virtual ~GroupPolicyChangeWatcher();
// Start watching.
void Start();
// Stop any pending watch activity in order to allow for timely shutdown.
void Stop();
private:
// Updates the watchers and schedules the reload task if appropriate.
void SetupWatches();
// Post a reload notification and update the watch machinery.
void Reload();
// Called for timer-based refresh from the message loop.
void ReloadFromTask();
// ObjectWatcher::Delegate implementation:
virtual void OnObjectSignaled(HANDLE object);
// MessageLoop::DestructionObserver implementation:
virtual void WillDestroyCurrentMessageLoop();
base::WeakPtr<ConfigurationPolicyProviderWin> provider_;
base::WaitableEvent user_policy_changed_event_;
base::WaitableEvent machine_policy_changed_event_;
base::ObjectWatcher user_policy_watcher_;
base::ObjectWatcher machine_policy_watcher_;
bool user_policy_watcher_failed_;
bool machine_policy_watcher_failed_;
// Period to schedule the reload task at.
int reload_interval_minutes_;
// A reference to a delayed task for timer-based reloading.
CancelableTask* reload_task_;
};
explicit ConfigurationPolicyProviderWin(
const StaticPolicyValueMap& policy_map);
virtual ~ConfigurationPolicyProviderWin();
// ConfigurationPolicyProvider method overrides:
virtual bool Provide(ConfigurationPolicyStore* store);
protected:
// The sub key path for Chromium's Group Policy information in the
// Windows registry.
static const wchar_t kPolicyRegistrySubKey[];
private:
scoped_refptr<GroupPolicyChangeWatcher> watcher_;
// Methods to perform type-specific policy lookups in the registry.
// HKLM is checked first, then HKCU.
// Reads a string registry value |name| at the specified |key| and puts the
// resulting string in |result|.
bool GetRegistryPolicyString(const string16& name, string16* result);
// Gets a list value contained under |key| one level below the policy root.
bool GetRegistryPolicyStringList(const string16& key, ListValue* result);
bool GetRegistryPolicyBoolean(const string16& value_name, bool* result);
bool GetRegistryPolicyInteger(const string16& value_name, uint32* result);
};
} // namespace policy
#endif // CHROME_BROWSER_POLICY_CONFIGURATION_POLICY_PROVIDER_WIN_H_
|
