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/* GPGOEInit.c - GPGOE DLL Loader |
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* Copyright (C) 2001, 2002, 2006 Timo Schulz |
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* |
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* This file is part of GPGOE. |
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* |
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* GPGOE is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU Lesser General Public License as published by |
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* the Free Software Foundation; either version 2.1 of the License, or |
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* (at your option) any later version. |
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* |
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* GPGOE is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public License |
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* along with GPGOE; if not, write to the Free Software Foundation, |
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* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA |
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*/ |
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|
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#ifdef HAVE_CONFIG_H |
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#include <config.h> |
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#endif |
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#include <windows.h> |
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#include <tlhelp32.h> |
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#include <stdio.h> |
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#include <ctype.h> |
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|
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#include "resource.h" |
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|
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|
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/* Supported plug-in modes. */ |
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enum gpgoe_mode_t { |
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GPGOE_MODE_NORMAL = 0, |
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GPGOE_MODE_PLAINREPLY = 1 |
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}; |
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|
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/* DLL imports. */ |
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int gpgoe_initialize (void); |
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int gpgoe_remove (void); |
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void gpgoe_set_active_modes (int mode); |
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int gpgoe_get_active_modes (void); |
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|
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|
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/* Global module handle. */ |
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static HINSTANCE glob_hinst = NULL; |
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|
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/* String array of programs which are known to cause trouble |
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with GPGoe. */ |
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static const char *conflict_apps[] = { |
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"DUMMY", /* dummy entry. */ |
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"SPYXX.EXE", |
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NULL |
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}; |
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|
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|
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/* Enumerate all processes and figure out if a program |
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is running which could be a conflict for gpgoe. */ |
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static int |
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check_for_conflict_apps (void) |
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{ |
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PROCESSENTRY32 pe; |
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HANDLE hd; |
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BOOL next; |
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int fnd = 0; |
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|
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hd = CreateToolhelp32Snapshot (TH32CS_SNAPPROCESS, 0); |
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if (hd == (HANDLE)-1) |
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return 0; |
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|
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memset (&pe, 0, sizeof (pe)); |
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pe.dwSize = sizeof (pe); |
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next = Process32First (hd, &pe); |
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while (next) { |
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size_t i; |
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|
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for (i=0; i < strlen (pe.szExeFile); i++) |
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pe.szExeFile[i] = (char)toupper ((int)pe.szExeFile[i]); |
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for (i=0; conflict_apps[i] != NULL; i++) { |
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if (strstr (pe.szExeFile, conflict_apps[i])) { |
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fnd = i; |
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break; |
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} |
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} |
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next = Process32Next (hd, &pe); |
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if (!next) |
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break; |
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} |
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CloseHandle (hd); |
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return fnd; |
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} |
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|
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|
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/* Return -1 if there was a running instance of OE detected. */ |
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static int |
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outlook_is_running (void) |
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{ |
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if (!FindWindowEx (NULL, NULL, "Outlook Express Browser Class", NULL)) |
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return 0; |
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return -1; |
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} |
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|
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|
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/* Set the menu item @muid to the state @state. */ |
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void |
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set_menu_state (HMENU menu, UINT muid, UINT state) |
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{ |
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MENUITEMINFO mii; |
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|
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memset (&mii, 0, sizeof (mii)); |
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mii.cbSize = sizeof (mii); |
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mii.fMask = MIIM_STATE; |
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mii.fState = state; |
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SetMenuItemInfo (menu, muid, FALSE, &mii); |
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} |
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|
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|
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/* Get an option with the name @name from the registry. */ |
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int |
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get_gpgoe_option (const char *name) |
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{ |
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HKEY hkey; |
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LONG err; |
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char val[32]; |
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DWORD type = 0, vallen = sizeof (val); |
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|
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err = RegOpenKeyEx (HKEY_CURRENT_USER, "Software\\GNU\\GPGoe", 0, |
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KEY_READ, &hkey); |
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if (err != ERROR_SUCCESS) |
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return 0; |
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err = RegQueryValueEx (hkey, name, NULL, &type, (BYTE*)val, &vallen); |
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RegCloseKey (hkey); |
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if (err != ERROR_SUCCESS) |
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return 0; |
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return atoi (val); |
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} |
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|
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|
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/* Put an option with the name @name and the value @val in th registry. */ |
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int |
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put_gpgoe_option (const char *name, int val) |
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{ |
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HKEY hkey; |
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char buf[32]; |
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LONG err; |
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|
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sprintf (buf, "%d", val); |
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err = RegOpenKeyEx (HKEY_CURRENT_USER, "Software\\GNU\\GPGoe", 0, |
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KEY_WRITE, &hkey); |
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if (err != ERROR_SUCCESS) |
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return -1; |
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err = RegSetValueEx (hkey, name, 0, REG_SZ, (BYTE *)buf, strlen (buf)); |
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RegCloseKey (hkey); |
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return err != ERROR_SUCCESS? -1 : 0; |
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} |
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|
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|
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/* Create the GPGoe registry if needed. */ |
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static int |
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create_registry_key (void) |
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{ |
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HKEY hkey; |
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LONG err; |
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|
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err = RegOpenKeyEx (HKEY_CURRENT_USER, "Software\\GNU\\GPGoe", |
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0, KEY_READ, &hkey); |
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if (err == ERROR_SUCCESS) { |
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RegCloseKey (hkey); |
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return 0; |
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} |
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err = RegCreateKey (HKEY_CURRENT_USER, "Software\\GNU\\GPGoe", &hkey); |
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if (err != ERROR_SUCCESS) |
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return -1; |
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RegCloseKey (hkey); |
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return 0; |
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} |
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|
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|
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/* Main window procedure for the taskbar program. */ |
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LRESULT CALLBACK |
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gpgoe_main_proc(HWND hwnd, UINT msg, WPARAM wparam, LPARAM lparam) |
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{ |
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static int decrypt_replies = 0; |
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NOTIFYICONDATA NID; |
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POINT p; |
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HMENU hm, popup; |
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int id; |
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|
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switch (msg) { |
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case WM_CREATE: |
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NID.cbSize = sizeof (NID); |
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NID.uFlags = NIF_MESSAGE | NIF_ICON | NIF_TIP; |
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NID.uCallbackMessage = WM_USER; |
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NID.hWnd = hwnd; |
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NID.hIcon = LoadIcon (glob_hinst, MAKEINTRESOURCE (IDI_GPGOE)); |
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strcpy(NID.szTip, "GPG for Outlook Express"); |
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Shell_NotifyIcon (NIM_ADD, &NID); |
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DestroyIcon (NID.hIcon); |
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|
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decrypt_replies = get_gpgoe_option ("PlaintextReply"); |
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if (decrypt_replies) |
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gpgoe_set_active_modes (GPGOE_MODE_PLAINREPLY); |
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if (gpgoe_initialize ()) { |
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MessageBox (hwnd, "Couldn't register GPG OE hook", "Error", MB_ICONERROR|MB_OK); |
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ExitProcess (0); |
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} |
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break; |
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|
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case WM_DESTROY: |
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case WM_ENDSESSION: |
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put_gpgoe_option ("PlaintextReply", decrypt_replies); |
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gpgoe_remove (); |
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Shell_NotifyIcon (NIM_DELETE, &NID); |
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PostQuitMessage (0); |
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ExitProcess (0); |
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return 0; |
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|
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case WM_COMMAND: |
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switch (LOWORD (wparam)) { |
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case ID_INIT_SUPP_PLAINREPLY: |
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decrypt_replies ^= 1; |
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if (!decrypt_replies) { |
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int modes = gpgoe_get_active_modes (); |
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gpgoe_set_active_modes (modes & (~GPGOE_MODE_PLAINREPLY)); |
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} |
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else { |
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gpgoe_set_active_modes (GPGOE_MODE_PLAINREPLY); |
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if (outlook_is_running ()) |
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MessageBox (NULL, "You need to restart Outlook Express.", |
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"GPGOE Information", MB_ICONINFORMATION|MB_OK); |
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} |
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break; |
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|
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case ID_INIT_QUIT: |
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SendMessage (hwnd, WM_DESTROY, 0, 0); |
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break; |
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} |
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break; |
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|
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case WM_USER: |
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switch (lparam) { |
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case WM_LBUTTONDBLCLK: |
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SetForegroundWindow (hwnd); |
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id = MessageBox (NULL, "Remove the GPG OE plug-in from the system?", |
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"Are you sure?", MB_YESNO|MB_ICONINFORMATION); |
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if (id == IDYES) |
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SendMessage (hwnd, WM_DESTROY, 0, 0); |
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break; |
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|
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case WM_RBUTTONUP: |
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SetForegroundWindow (hwnd); |
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GetCursorPos (&p); |
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hm = LoadMenu (glob_hinst, MAKEINTRESOURCE (IDR_INIT)); |
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popup = GetSubMenu (hm, 0); |
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set_menu_state (popup, ID_INIT_SUPP_PLAINREPLY, |
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decrypt_replies? MFS_CHECKED : MFS_UNCHECKED); |
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TrackPopupMenu (popup, TPM_RIGHTALIGN, p.x, p.y, 0, hwnd, NULL); |
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PostMessage (hwnd, WM_USER, 0, 0); |
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DestroyMenu (popup); |
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DestroyMenu (hm); |
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break; |
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} |
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break; |
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} |
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|
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return DefWindowProc (hwnd, msg, wparam, lparam); |
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} |
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|
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|
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/* Main entry function. */ |
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int WINAPI |
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WinMain (HINSTANCE hinst, HINSTANCE prev, LPSTR cmdline, int cmd_show) |
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{ |
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WNDCLASS wc; |
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HWND hwnd; |
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MSG msg; |
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int idx; |
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|
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idx = check_for_conflict_apps (); |
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if (idx > 0) { |
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char buf[256]; |
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_snprintf (buf, sizeof (buf)-1, |
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"GPGoe found an instance of a program which\n" |
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"might be effect the functionality of the plugin.\n" |
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"\n" |
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"Name of the process: %s\n" |
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"\n" |
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"Continue to load the plug-in?", conflict_apps[idx]); |
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idx = MessageBox (NULL, buf, "GPGOE Warning", MB_ICONWARNING|MB_YESNO); |
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if (idx == IDNO) |
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return 0; |
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} |
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|
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create_registry_key (); |
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glob_hinst = hinst; |
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CreateMutex (NULL, 1, "GPGOE"); |
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if (GetLastError () == ERROR_ALREADY_EXISTS) |
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return 0; |
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|
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memset (&wc, 0, sizeof(wc)); |
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wc.hInstance = hinst; |
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wc.lpszClassName = "GPGOE"; |
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wc.lpfnWndProc = (WNDPROC)gpgoe_main_proc; |
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if (!RegisterClass (&wc)) { |
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MessageBox (NULL, "Couldn't register the window class", "Error", |
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MB_ICONERROR|MB_OK); |
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return 1; |
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} |
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|
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hwnd = CreateWindow ("GPGOE", "GPGOE", 0, 0, 0, 0, 0, NULL, NULL, hinst, NULL); |
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if (!hwnd) { |
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MessageBox (NULL, "Couldn't create window", "Error", MB_ICONERROR|MB_OK); |
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return 1; |
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} |
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UpdateWindow (hwnd); |
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while (GetMessage (&msg, hwnd, 0, 0)) { |
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TranslateMessage (&msg); |
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DispatchMessage (&msg); |
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} |
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return 0; |
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} |
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