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/**************************************************************************
**
** Copyright (C) 2012-2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt Installer Framework.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
**************************************************************************/
#include "adminauthorization.h"
#include "utils.h"
#include <QDebug>
#include <QDir>
#include <QSettings>
#include <qt_windows.h>
#ifdef Q_CC_MINGW
# ifndef SEE_MASK_NOASYNC
# define SEE_MASK_NOASYNC 0x00000100
# endif
#endif
namespace QInstaller {
struct DeCoInitializer
{
DeCoInitializer()
: neededCoInit(CoInitialize(NULL) == S_OK)
{
}
~DeCoInitializer()
{
if (neededCoInit)
CoUninitialize();
}
bool neededCoInit;
};
bool AdminAuthorization::hasAdminRights()
{
SID_IDENTIFIER_AUTHORITY authority = { SECURITY_NT_AUTHORITY };
PSID adminGroup;
// Initialize SID.
if (!AllocateAndInitializeSid(&authority,
2,
SECURITY_BUILTIN_DOMAIN_RID,
DOMAIN_ALIAS_RID_ADMINS,
0, 0, 0, 0, 0, 0,
&adminGroup))
return false;
BOOL isInAdminGroup = FALSE;
if (!CheckTokenMembership(0, adminGroup, &isInAdminGroup))
isInAdminGroup = FALSE;
FreeSid(adminGroup);
return isInAdminGroup;
}
//copied from qsystemerror.cpp in Qt
static QString windowsErrorString(int errorCode)
{
QString ret;
wchar_t *string = 0;
FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER|FORMAT_MESSAGE_FROM_SYSTEM,
NULL,
errorCode,
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPWSTR)&string,
0,
NULL);
ret = QString::fromWCharArray(string);
LocalFree((HLOCAL)string);
if (ret.isEmpty() && errorCode == ERROR_MOD_NOT_FOUND)
ret = QString::fromLatin1("The specified module could not be found.");
ret.append(QLatin1String(" (0x"));
ret.append(QString::number(uint(errorCode), 16).rightJustified(8, QLatin1Char('0')));
ret.append(QLatin1String(")"));
return ret;
}
bool AdminAuthorization::execute(QWidget *, const QString &program, const QStringList &arguments)
{
DeCoInitializer _;
// AdminAuthorization::execute uses UAC to ask for admin privileges. If the user is no
// administrator yet and the computer's policies are set to not use UAC (which is the case
// in some corporate networks), the call to execute() will simply succeed and not at all
// launch the child process. To avoid this, we detect this situation here and return early.
if (!hasAdminRights()) {
QLatin1String key("HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\"
"Policies\\System");
QSettings registry(key, QSettings::NativeFormat);
const QVariant enableLUA = registry.value(QLatin1String("EnableLUA"));
if ((enableLUA.type() == QVariant::Int) && (enableLUA.toInt() == 0))
return false;
}
const QString file = QDir::toNativeSeparators(program);
const QString args = QInstaller::createCommandline(QString(), arguments);
SHELLEXECUTEINFOW shellExecuteInfo = { 0 };
shellExecuteInfo.nShow = SW_HIDE;
shellExecuteInfo.lpVerb = L"runas";
shellExecuteInfo.lpFile = (wchar_t *)file.utf16();
shellExecuteInfo.cbSize = sizeof(SHELLEXECUTEINFOW);
shellExecuteInfo.lpParameters = (wchar_t *)args.utf16();
shellExecuteInfo.fMask = SEE_MASK_NOASYNC;
qDebug() << QString::fromLatin1("Starting elevated process %1 with arguments: %2.").arg(file, args);
if (ShellExecuteExW(&shellExecuteInfo)) {
qDebug() << "Finished starting elevated process.";
return true;
} else {
qWarning() << QString::fromLatin1("Error while starting elevated process: %1, "
"Error: %2").arg(program, windowsErrorString(GetLastError()));
}
return false;
}
} // namespace QInstaller
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