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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/src/filesystem_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 {
NTSTATUS WINAPI TargetNtCreateFile(NtCreateFileFunction orig_CreateFile,
PHANDLE file, ACCESS_MASK desired_access,
POBJECT_ATTRIBUTES object_attributes,
PIO_STATUS_BLOCK io_status,
PLARGE_INTEGER allocation_size,
ULONG file_attributes, ULONG sharing,
ULONG disposition, ULONG options,
PVOID ea_buffer, ULONG ea_length) {
// Check if the process can open it first.
NTSTATUS status = orig_CreateFile(file, desired_access, object_attributes,
io_status, allocation_size,
file_attributes, sharing, disposition,
options, ea_buffer, ea_length);
if (STATUS_ACCESS_DENIED != status)
return status;
// We don't trust that the IPC can work this early.
if (!SandboxFactory::GetTargetServices()->GetState()->InitCalled())
return status;
do {
if (!ValidParameter(file, sizeof(HANDLE), WRITE))
break;
if (!ValidParameter(io_status, sizeof(IO_STATUS_BLOCK), WRITE))
break;
void* memory = GetGlobalIPCMemory();
if (NULL == memory)
break;
wchar_t* name;
uint32 attributes = 0;
NTSTATUS ret = AllocAndCopyName(object_attributes, &name, &attributes,
NULL);
if (!NT_SUCCESS(ret) || NULL == name)
break;
ULONG broker = FALSE;
CountedParameterSet<OpenFile> params;
params[OpenFile::NAME] = ParamPickerMake(name);
params[OpenFile::ACCESS] = ParamPickerMake(desired_access);
params[OpenFile::OPTIONS] = ParamPickerMake(options);
params[OpenFile::BROKER] = ParamPickerMake(broker);
if (!QueryBroker(IPC_NTCREATEFILE_TAG, params.GetBase()))
break;
SharedMemIPCClient ipc(memory);
CrossCallReturn answer = {0};
// The following call must match in the parameters with
// FilesystemDispatcher::ProcessNtCreateFile.
ResultCode code = CrossCall(ipc, IPC_NTCREATEFILE_TAG, name, attributes,
desired_access, file_attributes, sharing,
disposition, options, &answer);
operator delete(name, NT_ALLOC);
if (SBOX_ALL_OK != code)
break;
if (!NT_SUCCESS(answer.nt_status))
return answer.nt_status;
__try {
*file = answer.handle;
io_status->Status = answer.nt_status;
io_status->Information = answer.extended[0].ulong_ptr;
status = io_status->Status;
} __except(EXCEPTION_EXECUTE_HANDLER) {
break;
}
} while (false);
return status;
}
NTSTATUS WINAPI TargetNtOpenFile(NtOpenFileFunction orig_OpenFile, PHANDLE file,
ACCESS_MASK desired_access,
POBJECT_ATTRIBUTES object_attributes,
PIO_STATUS_BLOCK io_status, ULONG sharing,
ULONG options) {
// Check if the process can open it first.
NTSTATUS status = orig_OpenFile(file, desired_access, object_attributes,
io_status, sharing, options);
if (STATUS_ACCESS_DENIED != status)
return status;
// We don't trust that the IPC can work this early.
if (!SandboxFactory::GetTargetServices()->GetState()->InitCalled())
return status;
do {
if (!ValidParameter(file, sizeof(HANDLE), WRITE))
break;
if (!ValidParameter(io_status, sizeof(IO_STATUS_BLOCK), WRITE))
break;
void* memory = GetGlobalIPCMemory();
if (NULL == memory)
break;
wchar_t* name;
uint32 attributes;
NTSTATUS ret = AllocAndCopyName(object_attributes, &name, &attributes,
NULL);
if (!NT_SUCCESS(ret) || NULL == name)
break;
ULONG broker = FALSE;
CountedParameterSet<OpenFile> params;
params[OpenFile::NAME] = ParamPickerMake(name);
params[OpenFile::ACCESS] = ParamPickerMake(desired_access);
params[OpenFile::OPTIONS] = ParamPickerMake(options);
params[OpenFile::BROKER] = ParamPickerMake(broker);
if (!QueryBroker(IPC_NTOPENFILE_TAG, params.GetBase()))
break;
SharedMemIPCClient ipc(memory);
CrossCallReturn answer = {0};
ResultCode code = CrossCall(ipc, IPC_NTOPENFILE_TAG, name, attributes,
desired_access, sharing, options, &answer);
operator delete(name, NT_ALLOC);
if (SBOX_ALL_OK != code)
break;
if (!NT_SUCCESS(answer.nt_status))
return answer.nt_status;
__try {
*file = answer.handle;
io_status->Status = answer.nt_status;
io_status->Information = answer.extended[0].ulong_ptr;
status = io_status->Status;
} __except(EXCEPTION_EXECUTE_HANDLER) {
break;
}
} while (false);
return status;
}
NTSTATUS WINAPI TargetNtQueryAttributesFile(
NtQueryAttributesFileFunction orig_QueryAttributes,
POBJECT_ATTRIBUTES object_attributes,
PFILE_BASIC_INFORMATION file_attributes) {
// Check if the process can query it first.
NTSTATUS status = orig_QueryAttributes(object_attributes, file_attributes);
if (STATUS_ACCESS_DENIED != status)
return status;
// We don't trust that the IPC can work this early.
if (!SandboxFactory::GetTargetServices()->GetState()->InitCalled())
return status;
do {
if (!ValidParameter(file_attributes, sizeof(FILE_BASIC_INFORMATION), WRITE))
break;
void* memory = GetGlobalIPCMemory();
if (NULL == memory)
break;
wchar_t* name = NULL;
uint32 attributes = 0;
NTSTATUS ret = AllocAndCopyName(object_attributes, &name, &attributes,
NULL);
if (!NT_SUCCESS(ret) || NULL == name)
break;
InOutCountedBuffer file_info(file_attributes,
sizeof(FILE_BASIC_INFORMATION));
ULONG broker = FALSE;
CountedParameterSet<FileName> params;
params[FileName::NAME] = ParamPickerMake(name);
params[FileName::BROKER] = ParamPickerMake(broker);
if (!QueryBroker(IPC_NTQUERYATTRIBUTESFILE_TAG, params.GetBase()))
break;
SharedMemIPCClient ipc(memory);
CrossCallReturn answer = {0};
ResultCode code = CrossCall(ipc, IPC_NTQUERYATTRIBUTESFILE_TAG, name,
attributes, file_info, &answer);
operator delete(name, NT_ALLOC);
if (SBOX_ALL_OK != code)
break;
return answer.nt_status;
} while (false);
return status;
}
NTSTATUS WINAPI TargetNtQueryFullAttributesFile(
NtQueryFullAttributesFileFunction orig_QueryFullAttributes,
POBJECT_ATTRIBUTES object_attributes,
PFILE_NETWORK_OPEN_INFORMATION file_attributes) {
// Check if the process can query it first.
NTSTATUS status = orig_QueryFullAttributes(object_attributes,
file_attributes);
if (STATUS_ACCESS_DENIED != status)
return status;
// We don't trust that the IPC can work this early.
if (!SandboxFactory::GetTargetServices()->GetState()->InitCalled())
return status;
do {
if (!ValidParameter(file_attributes, sizeof(FILE_NETWORK_OPEN_INFORMATION),
WRITE))
break;
void* memory = GetGlobalIPCMemory();
if (NULL == memory)
break;
wchar_t* name = NULL;
uint32 attributes = 0;
NTSTATUS ret = AllocAndCopyName(object_attributes, &name, &attributes,
NULL);
if (!NT_SUCCESS(ret) || NULL == name)
break;
InOutCountedBuffer file_info(file_attributes,
sizeof(FILE_NETWORK_OPEN_INFORMATION));
ULONG broker = FALSE;
CountedParameterSet<FileName> params;
params[FileName::NAME] = ParamPickerMake(name);
params[FileName::BROKER] = ParamPickerMake(broker);
if (!QueryBroker(IPC_NTQUERYFULLATTRIBUTESFILE_TAG, params.GetBase()))
break;
SharedMemIPCClient ipc(memory);
CrossCallReturn answer = {0};
ResultCode code = CrossCall(ipc, IPC_NTQUERYFULLATTRIBUTESFILE_TAG, name,
attributes, file_info, &answer);
operator delete(name, NT_ALLOC);
if (SBOX_ALL_OK != code)
break;
return answer.nt_status;
} while (false);
return status;
}
NTSTATUS WINAPI TargetNtSetInformationFile(
NtSetInformationFileFunction orig_SetInformationFile, HANDLE file,
PIO_STATUS_BLOCK io_status, PVOID file_info, ULONG length,
FILE_INFORMATION_CLASS file_info_class) {
// Check if the process can open it first.
NTSTATUS status = orig_SetInformationFile(file, io_status, file_info, length,
file_info_class);
if (STATUS_ACCESS_DENIED != status)
return status;
// We don't trust that the IPC can work this early.
if (!SandboxFactory::GetTargetServices()->GetState()->InitCalled())
return status;
do {
void* memory = GetGlobalIPCMemory();
if (NULL == memory)
break;
if (!ValidParameter(io_status, sizeof(IO_STATUS_BLOCK), WRITE))
break;
if (!ValidParameter(file_info, length, READ))
break;
FILE_RENAME_INFORMATION* file_rename_info =
reinterpret_cast<FILE_RENAME_INFORMATION*>(file_info);
OBJECT_ATTRIBUTES object_attributes;
UNICODE_STRING object_name;
InitializeObjectAttributes(&object_attributes, &object_name, 0, NULL, NULL);
__try {
if (!IsSupportedRenameCall(file_rename_info, length, file_info_class))
break;
object_attributes.RootDirectory = file_rename_info->RootDirectory;
object_name.Buffer = file_rename_info->FileName;
object_name.Length = object_name.MaximumLength =
static_cast<USHORT>(file_rename_info->FileNameLength);
} __except(EXCEPTION_EXECUTE_HANDLER) {
break;
}
wchar_t* name;
NTSTATUS ret = AllocAndCopyName(&object_attributes, &name, NULL, NULL);
if (!NT_SUCCESS(ret) || !name)
break;
ULONG broker = FALSE;
CountedParameterSet<FileName> params;
params[FileName::NAME] = ParamPickerMake(name);
params[FileName::BROKER] = ParamPickerMake(broker);
if (!QueryBroker(IPC_NTSETINFO_RENAME_TAG, params.GetBase()))
break;
InOutCountedBuffer io_status_buffer(io_status, sizeof(IO_STATUS_BLOCK));
// This is actually not an InOut buffer, only In, but using InOut facility
// really helps to simplify the code.
InOutCountedBuffer file_info_buffer(file_info, length);
SharedMemIPCClient ipc(memory);
CrossCallReturn answer = {0};
ResultCode code = CrossCall(ipc, IPC_NTSETINFO_RENAME_TAG, file,
io_status_buffer, file_info_buffer, length,
file_info_class, &answer);
if (SBOX_ALL_OK != code)
break;
status = answer.nt_status;
} while (false);
return status;
}
} // namespace sandbox
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