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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #ifndef CHROME_BROWSER_POLICY_POLICY_LOADER_WIN_H_ | |
| 6 #define CHROME_BROWSER_POLICY_POLICY_LOADER_WIN_H_ | |
| 7 | |
| 8 #include <windows.h> | |
| 9 #include <userenv.h> | |
| 10 | |
| 11 #include "base/basictypes.h" | |
| 12 #include "base/files/file_path.h" | |
| 13 #include "base/memory/ref_counted.h" | |
| 14 #include "base/memory/scoped_ptr.h" | |
| 15 #include "base/strings/string16.h" | |
| 16 #include "base/synchronization/waitable_event.h" | |
| 17 #include "base/values.h" | |
| 18 #include "base/win/object_watcher.h" | |
| 19 #include "components/policy/core/common/async_policy_loader.h" | |
| 20 #include "components/policy/core/common/policy_types.h" | |
| 21 | |
| 22 namespace base { | |
| 23 class SequencedTaskRunner; | |
| 24 } | |
| 25 | |
| 26 namespace policy { | |
| 27 | |
| 28 class AppliedGPOListProvider; | |
| 29 class PolicyLoadStatusSample; | |
| 30 class PolicyMap; | |
| 31 class RegistryDict; | |
| 32 | |
| 33 // Interface for mocking out GPO enumeration in tests. | |
| 34 class AppliedGPOListProvider { | |
| 35 public: | |
| 36 virtual ~AppliedGPOListProvider() {} | |
| 37 virtual DWORD GetAppliedGPOList(DWORD flags, | |
| 38 LPCTSTR machine_name, | |
| 39 PSID sid_user, | |
| 40 GUID* extension_guid, | |
| 41 PGROUP_POLICY_OBJECT* gpo_list) = 0; | |
| 42 virtual BOOL FreeGPOList(PGROUP_POLICY_OBJECT gpo_list) = 0; | |
| 43 }; | |
| 44 | |
| 45 // Loads policies from the Windows registry, and watches for Group Policy | |
| 46 // notifications to trigger reloads. | |
| 47 class PolicyLoaderWin : public AsyncPolicyLoader, | |
| 48 public base::win::ObjectWatcher::Delegate { | |
| 49 public: | |
| 50 // The PReg file name used by GPO. | |
| 51 static const base::FilePath::CharType kPRegFileName[]; | |
| 52 | |
| 53 PolicyLoaderWin(scoped_refptr<base::SequencedTaskRunner> task_runner, | |
| 54 const string16& chrome_policy_key, | |
| 55 AppliedGPOListProvider* gpo_provider); | |
| 56 virtual ~PolicyLoaderWin(); | |
| 57 | |
| 58 // Creates a policy loader that uses the Win API to access GPO. | |
| 59 static scoped_ptr<PolicyLoaderWin> Create( | |
| 60 scoped_refptr<base::SequencedTaskRunner> task_runner, | |
| 61 const string16& chrome_policy_key); | |
| 62 | |
| 63 // AsyncPolicyLoader implementation. | |
| 64 virtual void InitOnBackgroundThread() OVERRIDE; | |
| 65 virtual scoped_ptr<PolicyBundle> Load() OVERRIDE; | |
| 66 | |
| 67 private: | |
| 68 // Builds the Chrome policy schema in |chrome_policy_schema_|. | |
| 69 void BuildChromePolicySchema(); | |
| 70 | |
| 71 // Reads Chrome Policy from a PReg file at the given path and stores the | |
| 72 // result in |policy|. | |
| 73 bool ReadPRegFile(const base::FilePath& preg_file, | |
| 74 RegistryDict* policy, | |
| 75 PolicyLoadStatusSample *status); | |
| 76 | |
| 77 // Loads and parses GPO policy in |policy_object_list| for scope |scope|. If | |
| 78 // successful, stores the result in |policy| and returns true. Returns false | |
| 79 // on failure reading the policy, indicating that policy loading should fall | |
| 80 // back to reading the registry. | |
| 81 bool LoadGPOPolicy(PolicyScope scope, | |
| 82 PGROUP_POLICY_OBJECT policy_object_list, | |
| 83 RegistryDict* policy, | |
| 84 PolicyLoadStatusSample *status); | |
| 85 | |
| 86 // Queries Windows for applied group policy and writes the result to |policy|. | |
| 87 // This is the preferred way to obtain GPO data, there are reports of abuse | |
| 88 // of the registry GPO keys by 3rd-party software. | |
| 89 bool ReadPolicyFromGPO(PolicyScope scope, | |
| 90 RegistryDict* policy, | |
| 91 PolicyLoadStatusSample *status); | |
| 92 | |
| 93 // Parses Chrome policy from |gpo_dict| for the given |scope| and |level| and | |
| 94 // merges it into |chrome_policy_map|. | |
| 95 void LoadChromePolicy(const RegistryDict* gpo_dict, | |
| 96 PolicyLevel level, | |
| 97 PolicyScope scope, | |
| 98 PolicyMap* chrome_policy_map); | |
| 99 | |
| 100 // Loads 3rd-party policy from |gpo_dict| and merges it into |bundle|. | |
| 101 void Load3rdPartyPolicy(const RegistryDict* gpo_dict, | |
| 102 PolicyScope scope, | |
| 103 PolicyBundle* bundle); | |
| 104 | |
| 105 // Installs the watchers for the Group Policy update events. | |
| 106 void SetupWatches(); | |
| 107 | |
| 108 // ObjectWatcher::Delegate overrides: | |
| 109 virtual void OnObjectSignaled(HANDLE object) OVERRIDE; | |
| 110 | |
| 111 bool is_initialized_; | |
| 112 const string16 chrome_policy_key_; | |
| 113 class AppliedGPOListProvider* gpo_provider_; | |
| 114 base::DictionaryValue chrome_policy_schema_; | |
| 115 | |
| 116 base::WaitableEvent user_policy_changed_event_; | |
| 117 base::WaitableEvent machine_policy_changed_event_; | |
| 118 base::win::ObjectWatcher user_policy_watcher_; | |
| 119 base::win::ObjectWatcher machine_policy_watcher_; | |
| 120 bool user_policy_watcher_failed_; | |
| 121 bool machine_policy_watcher_failed_; | |
| 122 | |
| 123 DISALLOW_COPY_AND_ASSIGN(PolicyLoaderWin); | |
| 124 }; | |
| 125 | |
| 126 } // namespace policy | |
| 127 | |
| 128 #endif // CHROME_BROWSER_POLICY_POLICY_LOADER_WIN_H_ | |
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