1 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef SANDBOX_SRC_FILESYSTEM_POLICY_H__ 6 #define SANDBOX_SRC_FILESYSTEM_POLICY_H__ 7 8 #include <string> 9 10 #include "base/basictypes.h" 11 #include "sandbox/win/src/crosscall_server.h" 12 #include "sandbox/win/src/nt_internals.h" 13 #include "sandbox/win/src/policy_low_level.h" 14 #include "sandbox/win/src/sandbox_policy.h" 15 16 namespace sandbox { 17 18 enum EvalResult; 19 20 // This class centralizes most of the knowledge related to file system policy 21 class FileSystemPolicy { 22 public: 23 // Creates the required low-level policy rules to evaluate a high-level 24 // policy rule for File IO, in particular open or create actions. 25 // 'name' is the file or directory name. 26 // 'semantics' is the desired semantics for the open or create. 27 // 'policy' is the policy generator to which the rules are going to be added. 28 static bool GenerateRules(const wchar_t* name, 29 TargetPolicy::Semantics semantics, 30 LowLevelPolicy* policy); 31 32 // Add basic file system rules. 33 static bool SetInitialRules(LowLevelPolicy* policy); 34 35 // Performs the desired policy action on a create request with an 36 // API that is compatible with the IPC-received parameters. 37 // 'client_info' : the target process that is making the request. 38 // 'eval_result' : The desired policy action to accomplish. 39 // 'file' : The target file or directory. 40 static bool CreateFileAction(EvalResult eval_result, 41 const ClientInfo& client_info, 42 const std::wstring &file, 43 uint32 attributes, 44 uint32 desired_access, 45 uint32 file_attributes, 46 uint32 share_access, 47 uint32 create_disposition, 48 uint32 create_options, 49 HANDLE* handle, 50 NTSTATUS* nt_status, 51 ULONG_PTR* io_information); 52 53 // Performs the desired policy action on an open request with an 54 // API that is compatible with the IPC-received parameters. 55 // 'client_info' : the target process that is making the request. 56 // 'eval_result' : The desired policy action to accomplish. 57 // 'file' : The target file or directory. 58 static bool OpenFileAction(EvalResult eval_result, 59 const ClientInfo& client_info, 60 const std::wstring &file, 61 uint32 attributes, 62 uint32 desired_access, 63 uint32 share_access, 64 uint32 open_options, 65 HANDLE* handle, 66 NTSTATUS* nt_status, 67 ULONG_PTR* io_information); 68 69 // Performs the desired policy action on a query request with an 70 // API that is compatible with the IPC-received parameters. 71 static bool QueryAttributesFileAction(EvalResult eval_result, 72 const ClientInfo& client_info, 73 const std::wstring &file, 74 uint32 attributes, 75 FILE_BASIC_INFORMATION* file_info, 76 NTSTATUS* nt_status); 77 78 // Performs the desired policy action on a query request with an 79 // API that is compatible with the IPC-received parameters. 80 static bool QueryFullAttributesFileAction( 81 EvalResult eval_result, 82 const ClientInfo& client_info, 83 const std::wstring &file, 84 uint32 attributes, 85 FILE_NETWORK_OPEN_INFORMATION* file_info, 86 NTSTATUS* nt_status); 87 88 // Performs the desired policy action on a set_info request with an 89 // API that is compatible with the IPC-received parameters. 90 static bool SetInformationFileAction(EvalResult eval_result, 91 const ClientInfo& client_info, 92 HANDLE target_file_handle, 93 void* file_info, 94 uint32 length, 95 uint32 info_class, 96 IO_STATUS_BLOCK* io_block, 97 NTSTATUS* nt_status); 98 }; 99 100 // Expands the path and check if it's a reparse point. Returns false if 101 // we cannot determine or if there is an unexpected error. In that case 102 // the path cannot be trusted. 103 bool PreProcessName(const std::wstring& path, std::wstring* new_path); 104 105 } // namespace sandbox 106 107 #endif // SANDBOX_SRC_FILESYSTEM_POLICY_H__ 108
