1 // Copyright (c) 2011 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_SANDBOX_POC_MAIN_UI_WINDOW_H__ 6 #define SANDBOX_SANDBOX_POC_MAIN_UI_WINDOW_H__ 7 8 #include <string> 9 10 #include "base/basictypes.h" 11 12 namespace sandbox { 13 class BrokerServices; 14 enum ResultCode; 15 } 16 17 // Header file for the MainUIWindow, a simple window with a menu bar that 18 // can pop up a dialog (accessible through the menu bar), to specify a path and 19 // filename of any DLL to load and choose an entry point of his/her choice 20 // (note: only entry points with no parameters are expected to work). 21 // 22 // The purpose of this is to be able to spawn an EXE inside a SandBox, have it 23 // load a DLL and call the entry point on it to test how it behaves inside the 24 // sandbox. This is useful for developer debugging and for security testing. 25 // 26 // The MainUIWindow also has a listview that displays debugging information to 27 // the user. 28 // 29 // Sample usage: 30 // 31 // MainUIWindow window; 32 // unsigned int ret = window.CreateMainWindowAndLoop( 33 // handle_to_current_instance, 34 // ::GetCommandLineW(), 35 // show_command, 36 // broker); 37 // 38 // The CreateMainWindowAndLoop() contains a message loop that ends when the 39 // user closes the MainUIWindow. 40 41 // This class encapsulates the Main UI window for the broker application. 42 // It simply shows a menu that gives the user the ability (through a dialog) to 43 // specify a DLL and what entry point to call in the DLL. 44 class MainUIWindow { 45 public: 46 MainUIWindow(); 47 ~MainUIWindow(); 48 49 // Creates the main window, displays it and starts the message pump. This 50 // call will not return until user closes the main UI window that appears 51 // as a result. Arguments 'instance', 'command_line' and 'show_cmd' can be 52 // passed in directly from winmain. The 'broker' argument is a pointer to a 53 // BrokerService that will launch a new EXE inside the sandbox and load the 54 // DLL of the user's choice. 55 unsigned int CreateMainWindowAndLoop(HINSTANCE instance, 56 wchar_t* command_line, 57 int show_command, 58 sandbox::BrokerServices* broker); 59 60 private: 61 // The default value DLL name to add to the edit box. 62 static const wchar_t kDefaultDll_[]; 63 64 // The default value to show in the entry point. 65 static const wchar_t kDefaultEntryPoint_[]; 66 67 // The default value to show in the log file. 68 static const wchar_t kDefaultLogFile_[]; 69 70 // Handles the messages sent to the main UI window. The return value is the 71 // result of the message processing and depends on the message. 72 static LRESULT CALLBACK WndProc(HWND window, 73 UINT message_id, 74 WPARAM wparam, 75 LPARAM lparam); 76 77 // Handles the messages sent to the SpawnTarget dialog. The return value is 78 // the result of the message processing and depends on the message. 79 static INT_PTR CALLBACK SpawnTargetWndProc(HWND dialog, 80 UINT message_id, 81 WPARAM wparam, 82 LPARAM lparam); 83 84 // Retrieves a pointer to the MainWindow from a value stored along with the 85 // window handle (passed in as hwnd). Return value is a pointer to the 86 // MainUIWindow previously stored with SetWindowLong() during WM_CREATE. 87 static MainUIWindow* FromWindow(HWND main_window); 88 89 // Handles the WM_CREATE message for the main UI window. Returns TRUE on 90 // success. 91 static BOOL OnCreate(HWND parent_window, LPCREATESTRUCT); 92 93 // Handles the WM_DESTROY message for the main UI window. 94 void OnDestroy(HWND window); 95 96 // Handles the WM_SIZE message for the main UI window. 97 void OnSize(HWND window, UINT state, int cx, int cy); 98 99 // Handles the WM_PAINT message for the main UI window. 100 void OnPaint(HWND window); 101 102 // Handles the menu command File \ Exit for the main UI window. 103 void OnFileExit(); 104 105 // Handles the menu command Commands \ Launch for the main UI window. 106 void OnCommandsLaunch(HWND window); 107 108 // Handles the Launch button in the SpawnTarget dialog (normally clicked 109 // after selecting DLL and entry point). OnLaunchDll will retrieve the 110 // values entered by the user and store it in the members of the class. 111 // Returns true if user selected a non-zero values for DLL filename 112 // (possibly including path also) and entry point. 113 bool OnLaunchDll(HWND dialog); 114 115 // Spawns a target EXE inside the sandbox (with the help of the 116 // BrokerServices passed in to CreateMainWindowAndLoop), and passes to it 117 // (as command line arguments) the DLL path and the entry point function 118 // name. The EXE is expected to parse the command line and load the DLL. 119 // NOTE: The broker does not know if the target EXE successfully loaded the 120 // DLL, for that you have to rely on the EXE providing a log. 121 // Returns true if the broker reports that it was successful in creating 122 // the target and false if not. 123 bool SpawnTarget(); 124 125 // Shows a standard File Open dialog and returns the DLL filename selected or 126 // blank string if the user cancelled (or an error occurred). 127 std::wstring OnShowBrowseForDllDlg(HWND owner); 128 129 // Shows a standard Save As dialog and returns the log filename selected or 130 // blank string if the user cancelled (or an error occurred). 131 std::wstring OnShowBrowseForLogFileDlg(HWND owner); 132 133 // Formats a message using the supplied format string and prints it in the 134 // listview in the main UI window. Passing a NULL param in 'fmt' results in 135 // no action being performed. Maximum message length is 1K. 136 void AddDebugMessage(const wchar_t* format, ...); 137 138 // Assists AddDebugMessage in displaying a message in the ListView. It 139 // simply wraps ListView_InsertItem to insert a debugging message to the 140 // top of the list view. Passing a NULL param in 'fmt' results in no action 141 // being performed. 142 void InsertLineInListView(wchar_t* debug_message); 143 144 // Calls ListenPipe using the class instance received in parameter. This is 145 // used to create new threads executing ListenPipe 146 static DWORD WINAPI ListenPipeThunk(void *param); 147 148 // Calls WaitForTargetThunk using the class instance received in parameter 149 // This is used to create new threads executing WaitForTarget. 150 static DWORD WINAPI WaitForTargetThunk(void *param); 151 152 // Listens on a pipe and output the data received to a file and to the UI. 153 DWORD ListenPipe(); 154 155 // Waits for the target to dies and display a message in the UI. 156 DWORD WaitForTarget(); 157 158 // The BrokerServices will be used to spawn an EXE in a sandbox and ask 159 // it to load a DLL. 160 sandbox::BrokerServices* broker_; 161 162 // Contains the information about the running target. 163 PROCESS_INFORMATION target_; 164 165 // This is essentially a command line to a target executable that the 166 // broker will spawn and ask to load the DLL. 167 std::wstring spawn_target_; 168 169 // A handle to the current instance of the app. Passed in to this class 170 // through CreateMainWindowAndLoop. 171 HINSTANCE instance_handle_; 172 173 // A path to the DLL that the target should load once it executes. 174 std::wstring dll_path_; 175 176 // The name of the entry point the target should call after it loads the DLL. 177 std::wstring entry_point_; 178 179 // The name of the log file to use. 180 std::wstring log_file_; 181 182 // This is a static handle to the list view that fills up the entire main 183 // UI window. The list view is used to display debugging information to the 184 // user. 185 static HWND list_view_; 186 187 // Pipe used to communicate the logs between the target and the broker. 188 HANDLE pipe_handle_; 189 190 DISALLOW_COPY_AND_ASSIGN(MainUIWindow); 191 }; 192 193 #endif // SANDBOX_SANDBOX_POC_MAIN_UI_WINDOW_H__ 194