1 // Copyright (c) 2011 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 SANDBOX_WIN_SRC_SANDBOX_POLICY_BASE_H_ 6 #define SANDBOX_WIN_SRC_SANDBOX_POLICY_BASE_H_ 7 8 #include <windows.h> 9 10 #include <list> 11 #include <vector> 12 13 #include "base/basictypes.h" 14 #include "base/compiler_specific.h" 15 #include "base/strings/string16.h" 16 #include "sandbox/win/src/crosscall_server.h" 17 #include "sandbox/win/src/handle_closer.h" 18 #include "sandbox/win/src/ipc_tags.h" 19 #include "sandbox/win/src/policy_engine_opcodes.h" 20 #include "sandbox/win/src/policy_engine_params.h" 21 #include "sandbox/win/src/sandbox_policy.h" 22 #include "sandbox/win/src/win_utils.h" 23 24 namespace sandbox { 25 26 class AppContainerAttributes; 27 class LowLevelPolicy; 28 class TargetProcess; 29 struct PolicyGlobal; 30 31 // We act as a policy dispatcher, implementing the handler for the "ping" IPC, 32 // so we have to provide the appropriate handler on the OnMessageReady method. 33 // There is a static_cast for the handler, and the compiler only performs the 34 // cast if the first base class is Dispatcher. 35 class PolicyBase : public Dispatcher, public TargetPolicy { 36 public: 37 PolicyBase(); 38 39 // TargetPolicy: 40 virtual void AddRef() OVERRIDE; 41 virtual void Release() OVERRIDE; 42 virtual ResultCode SetTokenLevel(TokenLevel initial, 43 TokenLevel lockdown) OVERRIDE; 44 virtual ResultCode SetJobLevel(JobLevel job_level, 45 uint32 ui_exceptions) OVERRIDE; 46 virtual ResultCode SetAlternateDesktop(bool alternate_winstation) OVERRIDE; 47 virtual string16 GetAlternateDesktop() const OVERRIDE; 48 virtual ResultCode CreateAlternateDesktop(bool alternate_winstation) OVERRIDE; 49 virtual void DestroyAlternateDesktop() OVERRIDE; 50 virtual ResultCode SetIntegrityLevel(IntegrityLevel integrity_level) OVERRIDE; 51 virtual ResultCode SetDelayedIntegrityLevel( 52 IntegrityLevel integrity_level) OVERRIDE; 53 virtual ResultCode SetAppContainer(const wchar_t* sid) OVERRIDE; 54 virtual ResultCode SetCapability(const wchar_t* sid) OVERRIDE; 55 virtual ResultCode SetProcessMitigations(MitigationFlags flags) OVERRIDE; 56 virtual MitigationFlags GetProcessMitigations() OVERRIDE; 57 virtual ResultCode SetDelayedProcessMitigations( 58 MitigationFlags flags) OVERRIDE; 59 virtual MitigationFlags GetDelayedProcessMitigations() OVERRIDE; 60 virtual void SetStrictInterceptions() OVERRIDE; 61 virtual ResultCode SetStdoutHandle(HANDLE handle) OVERRIDE; 62 virtual ResultCode SetStderrHandle(HANDLE handle) OVERRIDE; 63 virtual ResultCode AddRule(SubSystem subsystem, Semantics semantics, 64 const wchar_t* pattern) OVERRIDE; 65 virtual ResultCode AddDllToUnload(const wchar_t* dll_name); 66 virtual ResultCode AddKernelObjectToClose(const char16* handle_type, 67 const char16* handle_name) OVERRIDE; 68 69 // Dispatcher: 70 virtual Dispatcher* OnMessageReady(IPCParams* ipc, 71 CallbackGeneric* callback) OVERRIDE; 72 virtual bool SetupService(InterceptionManager* manager, int service) OVERRIDE; 73 74 // Creates a Job object with the level specified in a previous call to 75 // SetJobLevel(). 76 ResultCode MakeJobObject(HANDLE* job); 77 78 // Creates the two tokens with the levels specified in a previous call to 79 // SetTokenLevel(). 80 ResultCode MakeTokens(HANDLE* initial, HANDLE* lockdown); 81 82 const AppContainerAttributes* GetAppContainer(); 83 84 // Adds a target process to the internal list of targets. Internally a 85 // call to TargetProcess::Init() is issued. 86 bool AddTarget(TargetProcess* target); 87 88 // Called when there are no more active processes in a Job. 89 // Removes a Job object associated with this policy and the target associated 90 // with the job. 91 bool OnJobEmpty(HANDLE job); 92 93 EvalResult EvalPolicy(int service, CountedParameterSetBase* params); 94 95 HANDLE GetStdoutHandle(); 96 HANDLE GetStderrHandle(); 97 98 private: 99 ~PolicyBase(); 100 101 // Test IPC providers. 102 bool Ping(IPCInfo* ipc, void* cookie); 103 104 // Returns a dispatcher from ipc_targets_. 105 Dispatcher* GetDispatcher(int ipc_tag); 106 107 // Sets up interceptions for a new target. 108 bool SetupAllInterceptions(TargetProcess* target); 109 110 // Sets up the handle closer for a new target. 111 bool SetupHandleCloser(TargetProcess* target); 112 113 // This lock synchronizes operations on the targets_ collection. 114 CRITICAL_SECTION lock_; 115 // Maintains the list of target process associated with this policy. 116 // The policy takes ownership of them. 117 typedef std::list<TargetProcess*> TargetSet; 118 TargetSet targets_; 119 // Standard object-lifetime reference counter. 120 volatile LONG ref_count; 121 // The user-defined global policy settings. 122 TokenLevel lockdown_level_; 123 TokenLevel initial_level_; 124 JobLevel job_level_; 125 uint32 ui_exceptions_; 126 bool use_alternate_desktop_; 127 bool use_alternate_winstation_; 128 // Helps the file system policy initialization. 129 bool file_system_init_; 130 bool relaxed_interceptions_; 131 HANDLE stdout_handle_; 132 HANDLE stderr_handle_; 133 IntegrityLevel integrity_level_; 134 IntegrityLevel delayed_integrity_level_; 135 MitigationFlags mitigations_; 136 MitigationFlags delayed_mitigations_; 137 // The array of objects that will answer IPC calls. 138 Dispatcher* ipc_targets_[IPC_LAST_TAG]; 139 // Object in charge of generating the low level policy. 140 LowLevelPolicy* policy_maker_; 141 // Memory structure that stores the low level policy. 142 PolicyGlobal* policy_; 143 // The list of dlls to unload in the target process. 144 std::vector<string16> blacklisted_dlls_; 145 // This is a map of handle-types to names that we need to close in the 146 // target process. A null set means we need to close all handles of the 147 // given type. 148 HandleCloser handle_closer_; 149 std::vector<string16> capabilities_; 150 scoped_ptr<AppContainerAttributes> appcontainer_list_; 151 152 static HDESK alternate_desktop_handle_; 153 static HWINSTA alternate_winstation_handle_; 154 155 DISALLOW_COPY_AND_ASSIGN(PolicyBase); 156 }; 157 158 } // namespace sandbox 159 160 #endif // SANDBOX_WIN_SRC_SANDBOX_POLICY_BASE_H_ 161