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openvpn-gui/main.c

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/*
* OpenVPN-GUI -- A Windows GUI for OpenVPN.
*
* Copyright (C) 2004 Mathias Sundman <mathias@nilings.se>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program (see the file COPYING included with this
* distribution); if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#if !defined (UNICODE)
#error UNICODE and _UNICODE must be defined. This version only supports unicode builds.
#endif
#include <windows.h>
#include <shlwapi.h>
#include <wtsapi32.h>
#include <prsht.h>
#include <pbt.h>
#include <commdlg.h>
#include "tray.h"
#include "openvpn.h"
#include "openvpn_config.h"
#include "viewlog.h"
#include "service.h"
#include "main.h"
#include "options.h"
#include "passphrase.h"
#include "proxy.h"
#include "registry.h"
#include "openvpn-gui-res.h"
#include "localization.h"
#include "manage.h"
#include "misc.h"
#include "save_pass.h"
#ifndef DISABLE_CHANGE_PASSWORD
#include <openssl/evp.h>
#include <openssl/err.h>
#endif
/* Declare Windows procedure */
LRESULT CALLBACK WindowProcedure (HWND, UINT, WPARAM, LPARAM);
static void ShowSettingsDialog();
void CloseApplication(HWND hwnd);
void ImportConfigFile();
/* Class name and window title */
TCHAR szClassName[ ] = _T("OpenVPN-GUI");
TCHAR szTitleText[ ] = _T("OpenVPN");
/* Options structure */
options_t o;
/* Workaround for ASLR on Windows */
__declspec(dllexport) char aslr_workaround;
static int
VerifyAutoConnections()
{
int i;
BOOL match;
for (i = 0; i < MAX_CONFIGS && o.auto_connect[i] != 0; i++)
{
int j;
match = FALSE;
for (j = 0; j < MAX_CONFIGS; j++)
{
if (_tcsicmp(o.conn[j].config_file, o.auto_connect[i]) == 0)
{
match = TRUE;
break;
}
}
if (match == FALSE)
{
/* autostart config not found */
ShowLocalizedMsg(IDS_ERR_AUTOSTART_CONF, o.auto_connect[i]);
return FALSE;
}
}
return TRUE;
}
int WINAPI _tWinMain (HINSTANCE hThisInstance,
UNUSED HINSTANCE hPrevInstance,
UNUSED LPTSTR lpszArgument,
UNUSED int nCmdShow)
{
MSG messages; /* Here messages to the application are saved */
WNDCLASSEX wincl; /* Data structure for the windowclass */
DWORD shell32_version;
/* Initialize handlers for manangement interface notifications */
mgmt_rtmsg_handler handler[] = {
{ ready, OnReady },
{ hold, OnHold },
{ log, OnLogLine },
{ state, OnStateChange },
{ password, OnPassword },
{ proxy, OnProxy },
{ stop, OnStop },
{ needok, OnNeedOk },
{ needstr, OnNeedStr },
{ 0, NULL }
};
InitManagement(handler);
/* initialize options to default state */
InitOptions(&o);
#ifdef DEBUG
/* Open debug file for output */
if (!(o.debug_fp = _wfopen(DEBUG_FILE, L"a+,ccs=UTF-8")))
{
/* can't open debug file */
ShowLocalizedMsg(IDS_ERR_OPEN_DEBUG_FILE, DEBUG_FILE);
exit(1);
}
PrintDebug(_T("Starting OpenVPN GUI v%S"), PACKAGE_VERSION);
#endif
o.hInstance = hThisInstance;
if(!GetModuleHandle(_T("RICHED20.DLL")))
{
LoadLibrary(_T("RICHED20.DLL"));
}
else
{
/* can't load riched20.dll */
ShowLocalizedMsg(IDS_ERR_LOAD_RICHED20);
exit(1);
}
/* Check version of shell32.dll */
shell32_version=GetDllVersion(_T("shell32.dll"));
if (shell32_version < PACKVERSION(5,0))
{
/* shell32.dll version to low */
ShowLocalizedMsg(IDS_ERR_SHELL_DLL_VERSION, shell32_version);
exit(1);
}
#ifdef DEBUG
PrintDebug(_T("Shell32.dll version: 0x%lx"), shell32_version);
#endif
/* Check if a previous instance is already running. */
if ((FindWindow (szClassName, NULL)) != NULL)
{
/* GUI already running */
ShowLocalizedMsg(IDS_ERR_GUI_ALREADY_RUNNING);
exit(1);
}
UpdateRegistry(); /* Checks version change and update keys/values */
GetRegistryKeys();
/* Parse command-line options */
ProcessCommandLine(&o, GetCommandLine());
EnsureDirExists(o.config_dir);
if (!CheckVersion()) {
exit(1);
}
if (!EnsureDirExists(o.log_dir))
{
ShowLocalizedMsg(IDS_ERR_CREATE_PATH, _T("log_dir"), o.log_dir);
exit(1);
}
if (!IsUserAdmin() && strtod(o.ovpn_version, NULL) > 2.3 && !o.silent_connection)
CheckIServiceStatus(TRUE);
BuildFileList();
if (!VerifyAutoConnections()) {
exit(1);
}
GetProxyRegistrySettings();
#ifndef DISABLE_CHANGE_PASSWORD
/* Initialize OpenSSL */
OpenSSL_add_all_algorithms();
ERR_load_crypto_strings();
#endif
/* The Window structure */
wincl.hInstance = hThisInstance;
wincl.lpszClassName = szClassName;
wincl.lpfnWndProc = WindowProcedure; /* This function is called by windows */
wincl.style = CS_DBLCLKS; /* Catch double-clicks */
wincl.cbSize = sizeof (WNDCLASSEX);
/* Use default icon and mouse-pointer */
wincl.hIcon = LoadLocalizedIcon(ID_ICO_APP);
wincl.hIconSm = LoadLocalizedIcon(ID_ICO_APP);
wincl.hCursor = LoadCursor (NULL, IDC_ARROW);
wincl.lpszMenuName = NULL; /* No menu */
wincl.cbClsExtra = 0; /* No extra bytes after the window class */
wincl.cbWndExtra = 0; /* structure or the window instance */
/* Use Windows's default color as the background of the window */
wincl.hbrBackground = (HBRUSH) COLOR_3DSHADOW; //COLOR_BACKGROUND;
/* Register the window class, and if it fails quit the program */
if (!RegisterClassEx (&wincl))
return 1;
/* The class is registered, let's create the program*/
CreateWindowEx (
0, /* Extended possibilites for variation */
szClassName, /* Classname */
szTitleText, /* Title Text */
WS_OVERLAPPEDWINDOW, /* default window */
(int)CW_USEDEFAULT, /* Windows decides the position */
(int)CW_USEDEFAULT, /* where the window ends up on the screen */
230, /* The programs width */
200, /* and height in pixels */
HWND_DESKTOP, /* The window is a child-window to desktop */
NULL, /* No menu */
hThisInstance, /* Program Instance handler */
NULL /* No Window Creation data */
);
/* Run the message loop. It will run until GetMessage() returns 0 */
while (GetMessage (&messages, NULL, 0, 0))
{
TranslateMessage(&messages);
DispatchMessage(&messages);
}
/* The program return-value is 0 - The value that PostQuitMessage() gave */
return messages.wParam;
}
static void
StopAllOpenVPN()
{
int i;
for (i = 0; i < o.num_configs; i++)
{
if (o.conn[i].state != disconnected)
StopOpenVPN(&o.conn[i]);
}
/* Wait for all connections to terminate (Max 5 sec) */
for (i = 0; i < 20; i++, Sleep(250))
{
if (CountConnState(disconnected) == o.num_configs)
break;
}
}
static int
AutoStartConnections()
{
int i;
for (i = 0; i < o.num_configs; i++)
{
if (o.conn[i].auto_connect)
StartOpenVPN(&o.conn[i]);
}
return TRUE;
}
static void
ResumeConnections()
{
int i;
for (i = 0; i < o.num_configs; i++) {
/* Restart suspend connections */
if (o.conn[i].state == suspended)
StartOpenVPN(&o.conn[i]);
/* If some connection never reached SUSPENDED state */
if (o.conn[i].state == suspending)
StopOpenVPN(&o.conn[i]);
}
}
/*
* Set scale factor of windows in pixels. Scale = 100% for dpi = 96
*/
static void
dpi_setscale(UINT dpix)
{
/* scale factor in percentage compared to the reference dpi of 96 */
if (dpix != 0)
o.dpi_scale = MulDiv(dpix, 100, 96);
else
o.dpi_scale = 100;
PrintDebug(L"DPI scale set to %u", o.dpi_scale);
}
/*
* Get dpi of the system and set the scale factor.
* The system dpi may be different from the per monitor dpi on
* Win 8.1 later. We set dpi awareness to system-dpi level in the
* manifest, and let Windows automatically re-scale windows
* if/when dpi changes dynamically.
*/
static void
dpi_initialize(void)
{
UINT dpix = 0;
HDC hdc = GetDC(NULL);
if (hdc)
{
dpix = GetDeviceCaps(hdc, LOGPIXELSX);
ReleaseDC(NULL, hdc);
PrintDebug(L"System DPI: dpix = %u", dpix);
}
else
{
PrintDebug(L"GetDC failed, using default dpi = 96 (error = %lu)", GetLastError());
dpix = 96;
}
dpi_setscale(dpix);
}
/* This function is called by the Windows function DispatchMessage() */
LRESULT CALLBACK WindowProcedure (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
static UINT s_uTaskbarRestart;
switch (message) {
case WM_CREATE:
/* Save Window Handle */
o.hWnd = hwnd;
dpi_initialize();
s_uTaskbarRestart = RegisterWindowMessage(TEXT("TaskbarCreated"));
WTSRegisterSessionNotification(hwnd, NOTIFY_FOR_THIS_SESSION);
/* Load application icon */
HICON hIcon = LoadLocalizedIcon(ID_ICO_APP);
if (hIcon) {
SendMessage(hwnd, WM_SETICON, (WPARAM) (ICON_SMALL), (LPARAM) (hIcon));
SendMessage(hwnd, WM_SETICON, (WPARAM) (ICON_BIG), (LPARAM) (hIcon));
}
CreatePopupMenus(); /* Create popup menus */
ShowTrayIcon();
if (o.service_only)
CheckServiceStatus(); // Check if service is running or not
if (!AutoStartConnections()) {
SendMessage(hwnd, WM_CLOSE, 0, 0);
break;
}
break;
case WM_NOTIFYICONTRAY:
OnNotifyTray(lParam); // Manages message from tray
break;
case WM_COMMAND:
if ( (LOWORD(wParam) >= IDM_CONNECTMENU) && (LOWORD(wParam) < IDM_CONNECTMENU + MAX_CONFIGS) ) {
StartOpenVPN(&o.conn[LOWORD(wParam) - IDM_CONNECTMENU]);
}
if ( (LOWORD(wParam) >= IDM_DISCONNECTMENU) && (LOWORD(wParam) < IDM_DISCONNECTMENU + MAX_CONFIGS) ) {
StopOpenVPN(&o.conn[LOWORD(wParam) - IDM_DISCONNECTMENU]);
}
if ( (LOWORD(wParam) >= IDM_STATUSMENU) && (LOWORD(wParam) < IDM_STATUSMENU + MAX_CONFIGS) ) {
ShowWindow(o.conn[LOWORD(wParam) - IDM_STATUSMENU].hwndStatus, SW_SHOW);
}
if ( (LOWORD(wParam) >= IDM_VIEWLOGMENU) && (LOWORD(wParam) < IDM_VIEWLOGMENU + MAX_CONFIGS) ) {
ViewLog(LOWORD(wParam) - IDM_VIEWLOGMENU);
}
if ( (LOWORD(wParam) >= IDM_EDITMENU) && (LOWORD(wParam) < IDM_EDITMENU + MAX_CONFIGS) ) {
EditConfig(LOWORD(wParam) - IDM_EDITMENU);
}
if ( (LOWORD(wParam) >= IDM_CLEARPASSMENU) && (LOWORD(wParam) < IDM_CLEARPASSMENU + MAX_CONFIGS) ) {
DisablePasswordSave(&o.conn[LOWORD(wParam) - IDM_CLEARPASSMENU]);
}
#ifndef DISABLE_CHANGE_PASSWORD
if ( (LOWORD(wParam) >= IDM_PASSPHRASEMENU) && (LOWORD(wParam) < IDM_PASSPHRASEMENU + MAX_CONFIGS) ) {
ShowChangePassphraseDialog(&o.conn[LOWORD(wParam) - IDM_PASSPHRASEMENU]);
}
#endif
if (LOWORD(wParam) == IDM_IMPORT) {
ImportConfigFile();
}
if (LOWORD(wParam) == IDM_SETTINGS) {
ShowSettingsDialog();
}
if (LOWORD(wParam) == IDM_CLOSE) {
CloseApplication(hwnd);
}
if (LOWORD(wParam) == IDM_SERVICE_START) {
MyStartService();
}
if (LOWORD(wParam) == IDM_SERVICE_STOP) {
MyStopService();
}
if (LOWORD(wParam) == IDM_SERVICE_RESTART) MyReStartService();
break;
case WM_CLOSE:
CloseApplication(hwnd);
break;
case WM_DESTROY:
WTSUnRegisterSessionNotification(hwnd);
StopAllOpenVPN();
OnDestroyTray(); /* Remove Tray Icon and destroy menus */
PostQuitMessage (0); /* Send a WM_QUIT to the message queue */
break;
case WM_QUERYENDSESSION:
return(TRUE);
case WM_ENDSESSION:
StopAllOpenVPN();
OnDestroyTray();
break;
case WM_WTSSESSION_CHANGE:
switch (wParam) {
case WTS_SESSION_LOCK:
o.session_locked = TRUE;
break;
case WTS_SESSION_UNLOCK:
o.session_locked = FALSE;
if (CountConnState(suspended) != 0)
ResumeConnections();
break;
}
break;
default: /* for messages that we don't deal with */
if (message == s_uTaskbarRestart)
{
/* Explorer has restarted, re-register the tray icon. */
ShowTrayIcon();
CheckAndSetTrayIcon();
break;
}
return DefWindowProc (hwnd, message, wParam, lParam);
}
return 0;
}
static INT_PTR CALLBACK
AboutDialogFunc(UNUSED HWND hDlg, UINT msg, UNUSED WPARAM wParam, LPARAM lParam)
{
LPPSHNOTIFY psn;
if (msg == WM_NOTIFY) {
psn = (LPPSHNOTIFY) lParam;
if (psn->hdr.code == (UINT) PSN_APPLY)
return TRUE;
}
return FALSE;
}
static void
ShowSettingsDialog()
{
PROPSHEETPAGE psp[4];
int page_number = 0;
/* General tab */
psp[page_number].dwSize = sizeof(PROPSHEETPAGE);
psp[page_number].dwFlags = PSP_DLGINDIRECT;
psp[page_number].hInstance = o.hInstance;
psp[page_number].pResource = LocalizedDialogResource(ID_DLG_GENERAL);
psp[page_number].pfnDlgProc = GeneralSettingsDlgProc;
psp[page_number].lParam = 0;
psp[page_number].pfnCallback = NULL;
++page_number;
/* Proxy tab */
if (o.service_only == 0) {
psp[page_number].dwSize = sizeof(PROPSHEETPAGE);
psp[page_number].dwFlags = PSP_DLGINDIRECT;
psp[page_number].hInstance = o.hInstance;
psp[page_number].pResource = LocalizedDialogResource(ID_DLG_PROXY);
psp[page_number].pfnDlgProc = ProxySettingsDialogFunc;
psp[page_number].lParam = 0;
psp[page_number].pfnCallback = NULL;
++page_number;
}
/* Advanced tab */
psp[page_number].dwSize = sizeof(PROPSHEETPAGE);
psp[page_number].dwFlags = PSP_DLGINDIRECT;
psp[page_number].hInstance = o.hInstance;
psp[page_number].pResource = LocalizedDialogResource(ID_DLG_ADVANCED);
psp[page_number].pfnDlgProc = AdvancedSettingsDlgProc;
psp[page_number].lParam = 0;
psp[page_number].pfnCallback = NULL;
++page_number;
/* About tab */
psp[page_number].dwSize = sizeof(PROPSHEETPAGE);
psp[page_number].dwFlags = PSP_DLGINDIRECT;
psp[page_number].hInstance = o.hInstance;
psp[page_number].pResource = LocalizedDialogResource(ID_DLG_ABOUT);
psp[page_number].pfnDlgProc = AboutDialogFunc;
psp[page_number].lParam = 0;
psp[page_number].pfnCallback = NULL;
++page_number;
PROPSHEETHEADER psh;
psh.dwSize = sizeof(PROPSHEETHEADER);
psh.dwFlags = PSH_USEHICON | PSH_PROPSHEETPAGE | PSH_NOAPPLYNOW | PSH_NOCONTEXTHELP;
psh.hwndParent = o.hWnd;
psh.hInstance = o.hInstance;
psh.hIcon = LoadLocalizedIcon(ID_ICO_APP);
psh.pszCaption = LoadLocalizedString(IDS_SETTINGS_CAPTION);
psh.nPages = page_number;
psh.nStartPage = 0;
psh.ppsp = (LPCPROPSHEETPAGE) &psp;
psh.pfnCallback = NULL;
PropertySheet(&psh);
}
void
CloseApplication(HWND hwnd)
{
int i;
if (o.service_state == service_connected
&& ShowLocalizedMsgEx(MB_YESNO, _T("Exit OpenVPN"), IDS_NFO_SERVICE_ACTIVE_EXIT) == IDNO)
return;
for (i = 0; i < o.num_configs; i++)
{
if (o.conn[i].state == disconnected)
continue;
/* Ask for confirmation if still connected */
if (ShowLocalizedMsgEx(MB_YESNO, _T("Exit OpenVPN"), IDS_NFO_ACTIVE_CONN_EXIT) == IDNO)
return;
}
DestroyWindow(hwnd);
}
void
ImportConfigFile()
{
TCHAR filter[2*_countof(o.ext_string)+5];
_sntprintf_0(filter, _T("*.%s%c*.%s%c"), o.ext_string, _T('\0'), o.ext_string, _T('\0'));
OPENFILENAME fn;
TCHAR source[MAX_PATH] = _T("");
fn.lStructSize = sizeof(OPENFILENAME);
fn.hwndOwner = NULL;
fn.lpstrFilter = filter;
fn.lpstrCustomFilter = NULL;
fn.nFilterIndex = 1;
fn.lpstrFile = source;
fn.nMaxFile = MAX_PATH;
fn.lpstrFileTitle = NULL;
fn.lpstrInitialDir = NULL;
fn.lpstrTitle = NULL;
fn.Flags = OFN_DONTADDTORECENT | OFN_FILEMUSTEXIST;
fn.lpstrDefExt = NULL;
if (GetOpenFileName(&fn))
{
TCHAR destination[MAX_PATH];
PTCHAR fileName = source + fn.nFileOffset;
_sntprintf_0(destination, _T("%s\\%s"), o.config_dir, fileName);
destination[_tcslen(destination) - _tcslen(o.ext_string) - 1] = _T('\0');
if (EnsureDirExists(destination))
{
_sntprintf_0(destination, _T("%s\\%s"), destination, fileName);
if (!CopyFile(source, destination, TRUE))
{
if (GetLastError() == ERROR_FILE_EXISTS)
{
fileName[_tcslen(fileName) - _tcslen(o.ext_string) - 1] = _T('\0');
ShowLocalizedMsg(IDS_ERR_IMPORT_EXISTS, fileName);
return;
}
}
else
{
ShowLocalizedMsg(IDS_NFO_IMPORT_SUCCESS);
return;
}
}
ShowLocalizedMsg(IDS_ERR_IMPORT_FAILED, destination);
}
}
#ifdef DEBUG
void PrintDebugMsg(TCHAR *msg)
{
time_t log_time;
struct tm *time_struct;
TCHAR date[30];
log_time = time(NULL);
time_struct = localtime(&log_time);
_sntprintf(date, _countof(date), _T("%d-%.2d-%.2d %.2d:%.2d:%.2d"),
time_struct->tm_year + 1900,
time_struct->tm_mon + 1,
time_struct->tm_mday,
time_struct->tm_hour,
time_struct->tm_min,
time_struct->tm_sec);
_ftprintf(o.debug_fp, _T("%s %s\n"), date, msg);
fflush(o.debug_fp);
}
#endif
#define PACKVERSION(major,minor) MAKELONG(minor,major)
DWORD GetDllVersion(LPCTSTR lpszDllName)
{
HINSTANCE hinstDll;
DWORD dwVersion = 0;
/* For security purposes, LoadLibrary should be provided with a
fully-qualified path to the DLL. The lpszDllName variable should be
tested to ensure that it is a fully qualified path before it is used. */
hinstDll = LoadLibrary(lpszDllName);
if(hinstDll)
{
DLLGETVERSIONPROC pDllGetVersion;
pDllGetVersion = (DLLGETVERSIONPROC)GetProcAddress(hinstDll,
"DllGetVersion");
/* Because some DLLs might not implement this function, you
must test for it explicitly. Depending on the particular
DLL, the lack of a DllGetVersion function can be a useful
indicator of the version. */
if(pDllGetVersion)
{
DLLVERSIONINFO dvi;
HRESULT hr;
ZeroMemory(&dvi, sizeof(dvi));
dvi.cbSize = sizeof(dvi);
hr = (*pDllGetVersion)(&dvi);
if(SUCCEEDED(hr))
{
dwVersion = PACKVERSION(dvi.dwMajorVersion, dvi.dwMinorVersion);
}
}
FreeLibrary(hinstDll);
}
return dwVersion;
}
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