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// Copyright 2008, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#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;
if (NULL == answer.handle)
break;
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;
if (NULL == answer.handle)
break;
return answer.handle;
} while (false);
::SetLastError(original_error);
return NULL;
}
} // namespace sandbox
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