1 files changed, 107 insertions, 0 deletions
diff --git a/sandbox/win/src/sync_interception.cc b/sandbox/win/src/sync_interception.cc
new file mode 100644
index 0000000..4832c79
--- /dev/null
+++ b/sandbox/win/src/sync_interception.cc
@@ -0,0 +1,107 @@
+// Copyright (c) 2006-2008 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 "sandbox/src/sync_interception.h"
+
+#include "sandbox/src/crosscall_client.h"
+#include "sandbox/src/ipc_tags.h"
+#include "sandbox/src/policy_params.h"
+#include "sandbox/src/policy_target.h"
+#include "sandbox/src/sandbox_factory.h"
+#include "sandbox/src/sandbox_nt_util.h"
+#include "sandbox/src/sharedmem_ipc_client.h"
+#include "sandbox/src/target_services.h"
+
+namespace sandbox {
+
+HANDLE WINAPI TargetCreateEventW(CreateEventWFunction orig_CreateEvent,
+                                 LPSECURITY_ATTRIBUTES security_attributes,
+                                 BOOL manual_reset, BOOL initial_state,
+                                 LPCWSTR name) {
+  // Check if the process can create it first.
+  HANDLE handle = orig_CreateEvent(security_attributes, manual_reset,
+                                   initial_state, name);
+  DWORD original_error = ::GetLastError();
+  if (NULL != handle)
+    return handle;
+
+  // We don't trust that the IPC can work this early.
+  if (!SandboxFactory::GetTargetServices()->GetState()->InitCalled())
+    return NULL;
+
+  do {
+    if (security_attributes)
+      break;
+
+    void* memory = GetGlobalIPCMemory();
+    if (NULL == memory)
+      break;
+
+    CountedParameterSet<NameBased> params;
+    params[NameBased::NAME] = ParamPickerMake(name);
+
+    if (!QueryBroker(IPC_CREATEEVENT_TAG, params.GetBase()))
+      break;
+
+    SharedMemIPCClient ipc(memory);
+    CrossCallReturn answer = {0};
+    ResultCode code = CrossCall(ipc, IPC_CREATEEVENT_TAG, name, manual_reset,
+                                initial_state, &answer);
+
+    if (SBOX_ALL_OK != code)
+      break;
+
+    ::SetLastError(answer.win32_result);
+    return answer.handle;
+  } while (false);
+
+  ::SetLastError(original_error);
+  return NULL;
+}
+
+// Interception of OpenEventW on the child process.
+// It should never be called directly
+HANDLE WINAPI TargetOpenEventW(OpenEventWFunction orig_OpenEvent,
+                               ACCESS_MASK desired_access, BOOL inherit_handle,
+                               LPCWSTR name) {
+  // Check if the process can open it first.
+  HANDLE handle = orig_OpenEvent(desired_access, inherit_handle, name);
+  DWORD original_error = ::GetLastError();
+  if (NULL != handle)
+    return handle;
+
+  // We don't trust that the IPC can work this early.
+  if (!SandboxFactory::GetTargetServices()->GetState()->InitCalled())
+    return NULL;
+
+  do {
+    void* memory = GetGlobalIPCMemory();
+    if (NULL == memory)
+      break;
+
+    uint32 inherit_handle_ipc = inherit_handle;
+    CountedParameterSet<OpenEventParams> params;
+    params[OpenEventParams::NAME] = ParamPickerMake(name);
+    params[OpenEventParams::ACCESS] = ParamPickerMake(desired_access);
+
+    if (!QueryBroker(IPC_OPENEVENT_TAG, params.GetBase()))
+      break;
+
+    SharedMemIPCClient ipc(memory);
+    CrossCallReturn answer = {0};
+    ResultCode code = CrossCall(ipc, IPC_OPENEVENT_TAG, name, desired_access,
+                                inherit_handle_ipc, &answer);
+
+    if (SBOX_ALL_OK != code)
+      break;
+
+    ::SetLastError(answer.win32_result);
+    return answer.handle;
+  } while (false);
+
+  ::SetLastError(original_error);
+  return NULL;
+}
+
+}  // namespace sandbox