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// 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/win/src/sync_interception.h"
#include "sandbox/win/src/crosscall_client.h"
#include "sandbox/win/src/ipc_tags.h"
#include "sandbox/win/src/policy_params.h"
#include "sandbox/win/src/policy_target.h"
#include "sandbox/win/src/sandbox_factory.h"
#include "sandbox/win/src/sandbox_nt_util.h"
#include "sandbox/win/src/sharedmem_ipc_client.h"
#include "sandbox/win/src/target_services.h"
namespace sandbox {
ResultCode ProxyCreateEvent(LPCWSTR name,
BOOL initial_state,
BOOL manual_reset,
CrossCallReturn* answer) {
void* memory = GetGlobalIPCMemory();
if (!memory)
return SBOX_ERROR_GENERIC;
CountedParameterSet<NameBased> params;
params[NameBased::NAME] = ParamPickerMake(name);
if (!QueryBroker(IPC_CREATEEVENT_TAG, params.GetBase()))
return SBOX_ERROR_GENERIC;
SharedMemIPCClient ipc(memory);
ResultCode code = CrossCall(ipc, IPC_CREATEEVENT_TAG, name, manual_reset,
initial_state, answer);
return code;
}
ResultCode ProxyOpenEvent(LPCWSTR name,
ACCESS_MASK desired_access,
BOOL inherit_handle,
CrossCallReturn* answer) {
void* memory = GetGlobalIPCMemory();
if (!memory)
return SBOX_ERROR_GENERIC;
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()))
return SBOX_ERROR_GENERIC;
SharedMemIPCClient ipc(memory);
ResultCode code = CrossCall(ipc, IPC_OPENEVENT_TAG, name, desired_access,
inherit_handle_ipc, answer);
return code;
}
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);
if (handle || !name)
return handle;
DWORD original_error = ::GetLastError();
// We don't trust that the IPC can work this early.
if (!SandboxFactory::GetTargetServices()->GetState()->InitCalled())
return NULL;
CrossCallReturn answer = {0};
ResultCode code = ProxyCreateEvent(name, initial_state, manual_reset,
&answer);
if (code == SBOX_ALL_OK) {
::SetLastError(answer.win32_result);
return answer.handle;
}
::SetLastError(original_error);
return NULL;
}
HANDLE WINAPI TargetCreateEventA(CreateEventAFunction orig_CreateEvent,
LPSECURITY_ATTRIBUTES security_attributes,
BOOL manual_reset,
BOOL initial_state,
LPCSTR name) {
// Check if the process can create it first.
HANDLE handle = orig_CreateEvent(security_attributes, manual_reset,
initial_state, name);
if (handle || !name)
return handle;
DWORD original_error = ::GetLastError();
// We don't trust that the IPC can work this early.
if (!SandboxFactory::GetTargetServices()->GetState()->InitCalled())
return NULL;
UNICODE_STRING* wide_name = AnsiToUnicode(name);
if (!wide_name)
return NULL;
CrossCallReturn answer = {0};
ResultCode code = ProxyCreateEvent(wide_name->Buffer, initial_state,
manual_reset, &answer);
operator delete(wide_name, NT_ALLOC);
if (code == SBOX_ALL_OK) {
::SetLastError(answer.win32_result);
return answer.handle;
}
::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);
if (handle || !name)
return handle;
DWORD original_error = ::GetLastError();
// We don't trust that the IPC can work this early.
if (!SandboxFactory::GetTargetServices()->GetState()->InitCalled())
return NULL;
CrossCallReturn answer = {0};
ResultCode code = ProxyOpenEvent(name, desired_access, inherit_handle,
&answer);
if (code == SBOX_ALL_OK) {
::SetLastError(answer.win32_result);
return answer.handle;
}
::SetLastError(original_error);
return NULL;
}
HANDLE WINAPI TargetOpenEventA(OpenEventAFunction orig_OpenEvent,
ACCESS_MASK desired_access,
BOOL inherit_handle,
LPCSTR name) {
// Check if the process can open it first.
HANDLE handle = orig_OpenEvent(desired_access, inherit_handle, name);
if (handle || !name)
return handle;
DWORD original_error = ::GetLastError();
// We don't trust that the IPC can work this early.
if (!SandboxFactory::GetTargetServices()->GetState()->InitCalled())
return NULL;
UNICODE_STRING* wide_name = AnsiToUnicode(name);
if (!wide_name)
return NULL;
CrossCallReturn answer = {0};
ResultCode code = ProxyOpenEvent(wide_name->Buffer, desired_access,
inherit_handle, &answer);
operator delete(wide_name, NT_ALLOC);
if (code == SBOX_ALL_OK) {
::SetLastError(answer.win32_result);
return answer.handle;
}
::SetLastError(original_error);
return NULL;
}
} // namespace sandbox
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