mirror of
https://github.com/kasmtech/KasmVNC.git
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122 lines
3.6 KiB
C++
122 lines
3.6 KiB
C++
/* Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved.
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*
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* This is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This software 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 General Public License
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* along with this software; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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* USA.
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*/
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// -=- Currentuser.cxx
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#include <stdlib.h>
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#include <rfb/LogWriter.h>
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#include <rfb_win32/CurrentUser.h>
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#include <rfb_win32/Service.h>
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#include <lmcons.h>
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#include <wtsapi32.h>
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using namespace rfb;
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using namespace win32;
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static LogWriter vlog("CurrentUser");
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const TCHAR* shellIconClass = _T("Shell_TrayWnd");
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BOOL CALLBACK enumWindows(HWND hwnd, LPARAM lParam) {
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TCHAR className[16];
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if (GetClassName(hwnd, className, sizeof(className)) &&
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(_tcscmp(className, shellIconClass) == 0)) {
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vlog.debug("located tray icon window (%s)", (const char*)CStr(className));
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DWORD processId = 0;
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GetWindowThreadProcessId(hwnd, &processId);
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if (!processId)
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return TRUE;
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Handle process = OpenProcess(MAXIMUM_ALLOWED, FALSE, processId);
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if (!process.h)
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return TRUE;
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if (!OpenProcessToken(process, MAXIMUM_ALLOWED, (HANDLE*)lParam))
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return TRUE;
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vlog.debug("obtained user token");
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return FALSE;
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}
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return TRUE;
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}
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BOOL CALLBACK enumDesktops(LPTSTR lpszDesktop, LPARAM lParam) {
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HDESK desktop = OpenDesktop(lpszDesktop, 0, FALSE, DESKTOP_ENUMERATE);
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vlog.debug("opening \"%s\"", lpszDesktop);
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if (!desktop) {
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vlog.info("desktop \"%s\" inaccessible", (const char*)CStr(lpszDesktop));
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return TRUE;
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}
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BOOL result = EnumDesktopWindows(desktop, enumWindows, lParam);
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if (!CloseDesktop(desktop))
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vlog.info("unable to close desktop: %ld", GetLastError());
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return result;
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}
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CurrentUserToken::CurrentUserToken() {
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if (isServiceProcess()) {
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// Try to get the user token using the Terminal Services APIs
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WTSQueryUserToken(-1, &h);
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} else {
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// Try to open the security token for the User-Mode process
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if (!OpenProcessToken(GetCurrentProcess(), GENERIC_ALL, &h)) {
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DWORD err = GetLastError();
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if (err != ERROR_CALL_NOT_IMPLEMENTED)
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throw rdr::SystemException("OpenProcessToken failed", err);
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h = INVALID_HANDLE_VALUE;
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}
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}
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}
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ImpersonateCurrentUser::ImpersonateCurrentUser() {
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RegCloseKey(HKEY_CURRENT_USER);
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if (!isServiceProcess())
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return;
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if (!token.canImpersonate())
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throw rdr::Exception("Cannot impersonate unsafe or null token");
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if (!ImpersonateLoggedOnUser(token)) {
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DWORD err = GetLastError();
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if (err != ERROR_CALL_NOT_IMPLEMENTED)
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throw rdr::SystemException("Failed to impersonate user", GetLastError());
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}
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}
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ImpersonateCurrentUser::~ImpersonateCurrentUser() {
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if (!RevertToSelf()) {
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DWORD err = GetLastError();
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if (err != ERROR_CALL_NOT_IMPLEMENTED)
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exit(err);
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}
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RegCloseKey(HKEY_CURRENT_USER);
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}
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UserName::UserName() : TCharArray(UNLEN+1) {
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DWORD len = UNLEN+1;
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if (!GetUserName(buf, &len))
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throw rdr::SystemException("GetUserName failed", GetLastError());
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}
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UserSID::UserSID() {
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CurrentUserToken token;
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if (!token.canImpersonate())
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return;
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setSID(Sid::FromToken(token.h));
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}
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