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comparison: security/sandbox/win/src/handle_dispatcher.cc
security/sandbox/win/src/handle_dispatcher.cc
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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 #include "sandbox/win/src/handle_dispatcher.h" | |
| 6 | |
| 7 #include "base/win/scoped_handle.h" | |
| 8 #include "sandbox/win/src/handle_interception.h" | |
| 9 #include "sandbox/win/src/handle_policy.h" | |
| 10 #include "sandbox/win/src/ipc_tags.h" | |
| 11 #include "sandbox/win/src/policy_broker.h" | |
| 12 #include "sandbox/win/src/policy_params.h" | |
| 13 #include "sandbox/win/src/sandbox.h" | |
| 14 #include "sandbox/win/src/sandbox_nt_util.h" | |
| 15 #include "sandbox/win/src/sandbox_types.h" | |
| 16 #include "sandbox/win/src/sandbox_utils.h" | |
| 17 | |
| 18 namespace sandbox { | |
| 19 | |
| 20 HandleDispatcher::HandleDispatcher(PolicyBase* policy_base) | |
| 21 : policy_base_(policy_base) { | |
| 22 static const IPCCall duplicate_handle_proxy = { | |
| 23 {IPC_DUPLICATEHANDLEPROXY_TAG, VOIDPTR_TYPE, ULONG_TYPE, ULONG_TYPE, | |
| 24 ULONG_TYPE}, | |
| 25 reinterpret_cast<CallbackGeneric>(&HandleDispatcher::DuplicateHandleProxy) | |
| 26 }; | |
| 27 | |
| 28 ipc_calls_.push_back(duplicate_handle_proxy); | |
| 29 } | |
| 30 | |
| 31 bool HandleDispatcher::SetupService(InterceptionManager* manager, | |
| 32 int service) { | |
| 33 // We perform no interceptions for handles right now. | |
| 34 switch (service) { | |
| 35 case IPC_DUPLICATEHANDLEPROXY_TAG: | |
| 36 return true; | |
| 37 } | |
| 38 | |
| 39 return false; | |
| 40 } | |
| 41 | |
| 42 bool HandleDispatcher::DuplicateHandleProxy(IPCInfo* ipc, | |
| 43 HANDLE source_handle, | |
| 44 DWORD target_process_id, | |
| 45 DWORD desired_access, | |
| 46 DWORD options) { | |
| 47 NTSTATUS error; | |
| 48 static NtQueryObject QueryObject = NULL; | |
| 49 if (!QueryObject) | |
| 50 ResolveNTFunctionPtr("NtQueryObject", &QueryObject); | |
| 51 | |
| 52 // Get a copy of the handle for use in the broker process. | |
| 53 HANDLE handle_temp; | |
| 54 if (!::DuplicateHandle(ipc->client_info->process, source_handle, | |
| 55 ::GetCurrentProcess(), &handle_temp, | |
| 56 0, FALSE, DUPLICATE_SAME_ACCESS)) { | |
| 57 ipc->return_info.win32_result = ::GetLastError(); | |
| 58 return false; | |
| 59 } | |
| 60 base::win::ScopedHandle handle(handle_temp); | |
| 61 | |
| 62 // Get the object type (32 characters is safe; current max is 14). | |
| 63 BYTE buffer[sizeof(OBJECT_TYPE_INFORMATION) + 32 * sizeof(wchar_t)]; | |
| 64 OBJECT_TYPE_INFORMATION* type_info = | |
| 65 reinterpret_cast<OBJECT_TYPE_INFORMATION*>(buffer); | |
| 66 ULONG size = sizeof(buffer) - sizeof(wchar_t); | |
| 67 error = QueryObject(handle, ObjectTypeInformation, type_info, size, &size); | |
| 68 if (!NT_SUCCESS(error)) { | |
| 69 ipc->return_info.win32_result = error; | |
| 70 return false; | |
| 71 } | |
| 72 type_info->Name.Buffer[type_info->Name.Length / sizeof(wchar_t)] = L'\0'; | |
| 73 | |
| 74 CountedParameterSet<HandleTarget> params; | |
| 75 params[HandleTarget::NAME] = ParamPickerMake(type_info->Name.Buffer); | |
| 76 params[HandleTarget::TARGET] = ParamPickerMake(target_process_id); | |
| 77 | |
| 78 EvalResult eval = policy_base_->EvalPolicy(IPC_DUPLICATEHANDLEPROXY_TAG, | |
| 79 params.GetBase()); | |
| 80 ipc->return_info.win32_result = | |
| 81 HandlePolicy::DuplicateHandleProxyAction(eval, *ipc->client_info, | |
| 82 source_handle, | |
| 83 target_process_id, | |
| 84 &ipc->return_info.handle, | |
| 85 desired_access, options); | |
| 86 return true; | |
| 87 } | |
| 88 | |
| 89 } // namespace sandbox | |
| 90 |
