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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/filesystem_interception.h"
#include <stdint.h>
#include "sandbox/win/src/crosscall_client.h"
#include "sandbox/win/src/filesystem_policy.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"
#include "mozilla/sandboxing/sandboxLogging.h"
// This status occurs when trying to access a network share on the machine from
// which it is shared.
#define STATUS_NETWORK_OPEN_RESTRICTION ((NTSTATUS)0xC0000201L)
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 &&
STATUS_NETWORK_OPEN_RESTRICTION != status)
return status;
mozilla::sandboxing::LogBlocked("NtCreateFile",
object_attributes->ObjectName->Buffer,
object_attributes->ObjectName->Length);
// 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 (!memory)
break;
std::unique_ptr<wchar_t, NtAllocDeleter> name;
uint32_t attributes = 0;
NTSTATUS ret =
AllocAndCopyName(object_attributes, &name, &attributes, nullptr);
if (!NT_SUCCESS(ret) || !name)
break;
uint32_t desired_access_uint32 = desired_access;
uint32_t options_uint32 = options;
uint32_t disposition_uint32 = disposition;
uint32_t broker = BROKER_FALSE;
CountedParameterSet<OpenFile> params;
const wchar_t* name_ptr = name.get();
params[OpenFile::NAME] = ParamPickerMake(name_ptr);
params[OpenFile::ACCESS] = ParamPickerMake(desired_access_uint32);
params[OpenFile::DISPOSITION] = ParamPickerMake(disposition_uint32);
params[OpenFile::OPTIONS] = ParamPickerMake(options_uint32);
params[OpenFile::BROKER] = ParamPickerMake(broker);
if (!QueryBroker(IpcTag::NTCREATEFILE, params.GetBase()))
break;
SharedMemIPCClient ipc(memory);
CrossCallReturn answer = {0};
// The following call must match in the parameters with
// FilesystemDispatcher::ProcessNtCreateFile.
ResultCode code =
CrossCall(ipc, IpcTag::NTCREATEFILE, name.get(), attributes,
desired_access_uint32, file_attributes, sharing, disposition,
options_uint32, &answer);
if (SBOX_ALL_OK != code)
break;
status = answer.nt_status;
if (!NT_SUCCESS(answer.nt_status))
break;
__try {
*file = answer.handle;
io_status->Status = answer.nt_status;
io_status->Information = answer.extended[0].ulong_ptr;
} __except (EXCEPTION_EXECUTE_HANDLER) {
break;
}
mozilla::sandboxing::LogAllowed("NtCreateFile",
object_attributes->ObjectName->Buffer,
object_attributes->ObjectName->Length);
} 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 &&
STATUS_NETWORK_OPEN_RESTRICTION != status)
return status;
mozilla::sandboxing::LogBlocked("NtOpenFile",
object_attributes->ObjectName->Buffer,
object_attributes->ObjectName->Length);
// 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 (!memory)
break;
std::unique_ptr<wchar_t, NtAllocDeleter> name;
uint32_t attributes;
NTSTATUS ret =
AllocAndCopyName(object_attributes, &name, &attributes, nullptr);
if (!NT_SUCCESS(ret) || !name)
break;
uint32_t desired_access_uint32 = desired_access;
uint32_t options_uint32 = options;
uint32_t disposition_uint32 = FILE_OPEN;
uint32_t broker = BROKER_FALSE;
const wchar_t* name_ptr = name.get();
CountedParameterSet<OpenFile> params;
params[OpenFile::NAME] = ParamPickerMake(name_ptr);
params[OpenFile::ACCESS] = ParamPickerMake(desired_access_uint32);
params[OpenFile::DISPOSITION] = ParamPickerMake(disposition_uint32);
params[OpenFile::OPTIONS] = ParamPickerMake(options_uint32);
params[OpenFile::BROKER] = ParamPickerMake(broker);
if (!QueryBroker(IpcTag::NTOPENFILE, params.GetBase()))
break;
SharedMemIPCClient ipc(memory);
CrossCallReturn answer = {0};
ResultCode code =
CrossCall(ipc, IpcTag::NTOPENFILE, name.get(), attributes,
desired_access_uint32, sharing, options_uint32, &answer);
if (SBOX_ALL_OK != code)
break;
status = answer.nt_status;
if (!NT_SUCCESS(answer.nt_status))
break;
__try {
*file = answer.handle;
io_status->Status = answer.nt_status;
io_status->Information = answer.extended[0].ulong_ptr;
} __except (EXCEPTION_EXECUTE_HANDLER) {
break;
}
mozilla::sandboxing::LogAllowed("NtOpenFile",
object_attributes->ObjectName->Buffer,
object_attributes->ObjectName->Length);
} 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 &&
STATUS_NETWORK_OPEN_RESTRICTION != status)
return status;
mozilla::sandboxing::LogBlocked("NtQueryAttributesFile",
object_attributes->ObjectName->Buffer,
object_attributes->ObjectName->Length);
// 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 (!memory)
break;
std::unique_ptr<wchar_t, NtAllocDeleter> name;
uint32_t attributes = 0;
NTSTATUS ret =
AllocAndCopyName(object_attributes, &name, &attributes, nullptr);
if (!NT_SUCCESS(ret) || !name)
break;
InOutCountedBuffer file_info(file_attributes,
sizeof(FILE_BASIC_INFORMATION));
uint32_t broker = BROKER_FALSE;
CountedParameterSet<FileName> params;
const wchar_t* name_ptr = name.get();
params[FileName::NAME] = ParamPickerMake(name_ptr);
params[FileName::BROKER] = ParamPickerMake(broker);
if (!QueryBroker(IpcTag::NTQUERYATTRIBUTESFILE, params.GetBase()))
break;
SharedMemIPCClient ipc(memory);
CrossCallReturn answer = {0};
ResultCode code = CrossCall(ipc, IpcTag::NTQUERYATTRIBUTESFILE, name.get(),
attributes, file_info, &answer);
if (SBOX_ALL_OK != code)
break;
status = answer.nt_status;
mozilla::sandboxing::LogAllowed("NtQueryAttributesFile",
object_attributes->ObjectName->Buffer,
object_attributes->ObjectName->Length);
} 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 &&
STATUS_NETWORK_OPEN_RESTRICTION != status)
return status;
mozilla::sandboxing::LogBlocked("NtQueryFullAttributesFile",
object_attributes->ObjectName->Buffer,
object_attributes->ObjectName->Length);
// 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 (!memory)
break;
std::unique_ptr<wchar_t, NtAllocDeleter> name;
uint32_t attributes = 0;
NTSTATUS ret =
AllocAndCopyName(object_attributes, &name, &attributes, nullptr);
if (!NT_SUCCESS(ret) || !name)
break;
InOutCountedBuffer file_info(file_attributes,
sizeof(FILE_NETWORK_OPEN_INFORMATION));
uint32_t broker = BROKER_FALSE;
CountedParameterSet<FileName> params;
const wchar_t* name_ptr = name.get();
params[FileName::NAME] = ParamPickerMake(name_ptr);
params[FileName::BROKER] = ParamPickerMake(broker);
if (!QueryBroker(IpcTag::NTQUERYFULLATTRIBUTESFILE, params.GetBase()))
break;
SharedMemIPCClient ipc(memory);
CrossCallReturn answer = {0};
ResultCode code = CrossCall(ipc, IpcTag::NTQUERYFULLATTRIBUTESFILE,
name.get(), attributes, file_info, &answer);
if (SBOX_ALL_OK != code)
break;
status = answer.nt_status;
mozilla::sandboxing::LogAllowed("NtQueryFullAttributesFile",
object_attributes->ObjectName->Buffer,
object_attributes->ObjectName->Length);
} 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;
mozilla::sandboxing::LogBlocked("NtSetInformationFile");
// We don't trust that the IPC can work this early.
if (!SandboxFactory::GetTargetServices()->GetState()->InitCalled())
return status;
do {
void* memory = GetGlobalIPCMemory();
if (!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, nullptr,
nullptr);
__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;
}
std::unique_ptr<wchar_t, NtAllocDeleter> name;
NTSTATUS ret =
AllocAndCopyName(&object_attributes, &name, nullptr, nullptr);
if (!NT_SUCCESS(ret) || !name)
break;
uint32_t broker = BROKER_FALSE;
CountedParameterSet<FileName> params;
const wchar_t* name_ptr = name.get();
params[FileName::NAME] = ParamPickerMake(name_ptr);
params[FileName::BROKER] = ParamPickerMake(broker);
if (!QueryBroker(IpcTag::NTSETINFO_RENAME, 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, IpcTag::NTSETINFO_RENAME, file, io_status_buffer,
file_info_buffer, length, file_info_class, &answer);
if (SBOX_ALL_OK != code)
break;
status = answer.nt_status;
mozilla::sandboxing::LogAllowed("NtSetInformationFile");
} while (false);
return status;
}
} // namespace sandbox
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