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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.
#ifndef SANDBOX_SRC_FILESYSTEM_POLICY_H__
#define SANDBOX_SRC_FILESYSTEM_POLICY_H__
#include <string>
#include "base/basictypes.h"
#include "sandbox/src/crosscall_server.h"
#include "sandbox/src/nt_internals.h"
#include "sandbox/src/policy_low_level.h"
#include "sandbox/src/sandbox_policy.h"
namespace sandbox {
enum EvalResult;
// This class centralizes most of the knowledge related to file system policy
class FileSystemPolicy {
public:
// Creates the required low-level policy rules to evaluate a high-level
// policy rule for File IO, in particular open or create actions.
// 'name' is the file or directory name.
// 'semantics' is the desired semantics for the open or create.
// 'policy' is the policy generator to which the rules are going to be added.
static bool GenerateRules(const wchar_t* name,
TargetPolicy::Semantics semantics,
LowLevelPolicy* policy);
// Add basic file system rules.
static bool SetInitialRules(LowLevelPolicy* policy);
// Performs the desired policy action on a create request with an
// API that is compatible with the IPC-received parameters.
// 'client_info' : the target process that is making the request.
// 'eval_result' : The desired policy action to accomplish.
// 'file' : The target file or directory.
static bool CreateFileAction(EvalResult eval_result,
const ClientInfo& client_info,
const std::wstring &file,
uint32 attributes,
uint32 desired_access,
uint32 file_attributes,
uint32 share_access,
uint32 create_disposition,
uint32 create_options,
HANDLE* handle,
NTSTATUS* nt_status,
ULONG_PTR* io_information);
// Performs the desired policy action on an open request with an
// API that is compatible with the IPC-received parameters.
// 'client_info' : the target process that is making the request.
// 'eval_result' : The desired policy action to accomplish.
// 'file' : The target file or directory.
static bool OpenFileAction(EvalResult eval_result,
const ClientInfo& client_info,
const std::wstring &file,
uint32 attributes,
uint32 desired_access,
uint32 share_access,
uint32 open_options,
HANDLE* handle,
NTSTATUS* nt_status,
ULONG_PTR* io_information);
// Performs the desired policy action on a query request with an
// API that is compatible with the IPC-received parameters.
static bool QueryAttributesFileAction(EvalResult eval_result,
const ClientInfo& client_info,
const std::wstring &file,
uint32 attributes,
FILE_BASIC_INFORMATION* file_info,
NTSTATUS* nt_status);
// Performs the desired policy action on a query request with an
// API that is compatible with the IPC-received parameters.
static bool QueryFullAttributesFileAction(
EvalResult eval_result,
const ClientInfo& client_info,
const std::wstring &file,
uint32 attributes,
FILE_NETWORK_OPEN_INFORMATION* file_info,
NTSTATUS* nt_status);
// Performs the desired policy action on a set_info request with an
// API that is compatible with the IPC-received parameters.
static bool SetInformationFileAction(EvalResult eval_result,
const ClientInfo& client_info,
HANDLE target_file_handle,
void* file_info,
uint32 length,
uint32 info_class,
IO_STATUS_BLOCK* io_block,
NTSTATUS* nt_status);
};
// Expands the path and check if it's a reparse point. Returns false if
// we cannot determine or if there is an unexpected error. In that case
// the path cannot be trusted.
bool PreProcessName(const std::wstring& path, std::wstring* new_path);
} // namespace sandbox
#endif // SANDBOX_SRC_FILESYSTEM_POLICY_H__
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