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/*
Copyright (C) 2013 Red Hat, Inc.
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. If not, see <http://www.gnu.org/licenses/>.
*/
#include "vdcommon.h"
#include "as_user.h"
#include <wtsapi32.h>
AsUser::AsUser(DWORD session_id):
_session_id(session_id),
_token(INVALID_HANDLE_VALUE),
_started(false)
{
}
bool AsUser::begin()
{
BOOL ret;
if (_session_id == (DWORD)-1) {
ret = ProcessIdToSessionId(GetCurrentProcessId(), &_session_id);
if (!ret) {
vd_printf("ProcessIdToSessionId failed %lu", GetLastError());
return false;
}
}
if (_token == INVALID_HANDLE_VALUE) {
ret = WTSQueryUserToken(_session_id, &_token);
if (!ret) {
vd_printf("WTSQueryUserToken failed -- %lu", GetLastError());
return false;
}
}
ret = ImpersonateLoggedOnUser(_token);
if (!ret) {
vd_printf("ImpersonateLoggedOnUser failed: %lu", GetLastError());
return false;
}
_started = true;
return true;
}
void AsUser::end()
{
if (_started) {
RevertToSelf();
_started = false;
}
}
AsUser::~AsUser()
{
end();
if (_token != INVALID_HANDLE_VALUE) {
CloseHandle(_token);
}
}
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