Differential D22438 Diff 62666 src/util/externalcommand_polkitbackend.cpp

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src/util/externalcommand_polkitbackend.cpp

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1​ /*************************************************************************
2​ * Copyright (C) 2019 by Shubham <aryan100jangid@gmail.com> *
3​ * *
4​ * This program is free software; you can redistribute it and/or *
5​ * modify it under the terms of the GNU General Public License as *
6​ * published by the Free Software Foundation; either version 3 of *
7​ * the License, or (at your option) any later version. *
8​ * *
9​ * This program is distributed in the hope that it will be useful, *
10​ * but WITHOUT ANY WARRANTY; without even the implied warranty of *
11​ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
12​ * GNU General Public License for more details. *
13​ * *
14​ * You should have received a copy of the GNU General Public License *
15​ * along with this program. If not, see <http://www.gnu.org/licenses/>.*
16​ *************************************************************************/
17​
18​#include "util/externalcommand_polkitbackend.h"
19​
20​#include <QApplication>
21​#include <QDebug>
22​#include <QDBusConnection>
23​#include <QDBusConnectionInterface>
24​#include <QEventLoop>
25​#include <QString>
26​#include <QTimer>
27​#include <QWidget>
28​
29​#include <PolkitQt1/Authority>
30​#include <PolkitQt1/Subject>
31​
32​using namespace PolkitQt1;
33​
34​namespace Auth
35​{
36​
37​PolkitEventLoop::PolkitEventLoop(QObject *parent)
38​ : QEventLoop(qobject_cast<QEventLoop *>(parent)),
39​ m_result(Authority::No)
40​{
41​
42​}
43​
44​PolkitEventLoop::~PolkitEventLoop()
45​{
46​
47​}
48​
49​Authority::Result PolkitEventLoop::result() const
50​{
51​ return m_result;
52​}
53​
54​PolkitQt1Backend::PolkitQt1Backend()
55​ : m_flyingActions(false)
56​{
57​ // Connect various useful Polkit signals
58​ connect(Authority::instance(), &Authority::configChanged, this, &Auth::PolkitQt1Backend::authStatusChanged);
59​ connect(Authority::instance(), &Authority::consoleKitDBChanged, this, &Auth::PolkitQt1Backend::authStatusChanged);
60​
61​ m_flyingActions = true;
62​}
63​
64​PolkitQt1Backend::~PolkitQt1Backend()
65​{
66​
67​}
68​
69​void PolkitQt1Backend::initPolkitAgent(const QString &action, QWidget *parent /*= nullptr*/) const
70​{
71​ if (!parent) {
72​ qWarning() << "Parent widget does not exists, can not proceed further";
73​ return;
74​ }
75​
76​ // Check if we are running terminal session or GUI session
77​ if (!qApp) {
78​ qWarning() << "We are running a TTY (Terminal) session";
79​ qDebug() << "Can not proceed further since we do not support Text based Polkit Authentication Agent";
80​ return;
81​ }
82​
83​ // Get the dialog parent window Id
84​ quint64 parentWindowID = parent->effectiveWinId();
85​
86​ // Make a call to the KDE polkit Authentication Agent asking for it's services
87​ QDBusMessage callAgent = QDBusMessage::createMethodCall(QLatin1String("org.kde.polkit-kde-authentication-agent-1"), QLatin1String("/org/kde/Polkit1AuthAgent"), QLatin1String("org.kde.Polkit1AuthAgent"),
88​ QLatin1String("setWindowIdForAction"));
89​
90​ callAgent << action;
91​ callAgent << parentWindowID;
92​
93​ QDBusPendingCall call = QDBusConnection::sessionBus().asyncCall(callAgent);
94​ call.waitForFinished();
95​
96​ auto watcher = new QDBusPendingCallWatcher(call);
97​
98​ connect(watcher, &QDBusPendingCallWatcher::finished, this, [this, action, watcher](){
99​
100​ const QDBusMessage reply = watcher->reply();
101​
102​ if (reply.type() == QDBusMessage::ErrorMessage) {
103​ qWarning() << "Could not call the Authentication Agent, Error:" << reply.errorMessage();
104​ }
105​
106​ watcher->deleteLater();
107​ });
108​}
109​
110​Authority::Result PolkitQt1Backend::actionStatus(const QString &action, const QByteArray &callerID) const
111​{
112​ SystemBusNameSubject subject(QString::fromUtf8(callerID));
113​
114​ auto authority = Authority::instance();
115​
116​ auto result = authority->checkAuthorizationSync(action, subject, Authority::AllowUserInteraction);
117​
118​ if (authority->hasError()) {
119​ qDebug() << "Encountered error while checking action status, Error code:" << authority->lastError() << "\n";
120​ qDebug() << "Error Details:" << authority->errorDetails();
121​ authority->clearError();
122​ }
123​
124​ return result;
125​}
126​
127​QByteArray PolkitQt1Backend::callerID() const
128​{
129​ return QDBusConnection::systemBus().baseService().toUtf8();
130​}
131​
132​bool PolkitQt1Backend::authorizeAction(const QString &action, const QByteArray &callerID)
133​{
134​ SystemBusNameSubject subject(QString::fromUtf8(callerID));
135​
136​ auto authority = Authority::instance();
137​
138​ PolkitEventLoop event;
139​ event.processEvents();
140​
141​ connect(authority, &Authority::checkAuthorizationFinished, &event, &PolkitEventLoop::quit);
142​
143​ authority->checkAuthorization(action, subject, Authority::AllowUserInteraction);
144​
145​ event.exec();
146​
147​ if (authority->hasError()) {
148​ qWarning() << "Encountered error while checking authorization, Error code:" << authority->lastError() << "\n";
149​ qDebug() << "Error details:" << authority->errorDetails();
150​
151​ // Clear all the errors from the buffer so that hasError() does not give previous error as a result when called later
152​ authority->clearError();
153​ }
154​
155​ if (event.result() == Authority::Yes) {
156​ return true;
157​ } else {
158​ return false;
159​ }
160​}
161​
162​bool PolkitQt1Backend::revokeAuthorization(const QString &action, const QByteArray &callerID)
163​{
164​ Q_UNUSED(action)
165​
166​ SystemBusNameSubject subject(QString::fromUtf8(callerID));
167​
168​ auto authority = Authority::instance();
169​
170​ return authority->revokeTemporaryAuthorizationsSync(subject);
171​}
172​
173​void PolkitQt1Backend::authStatusChanged()
174​{
175​ for (auto it = m_cachedResults.begin(); it != m_cachedResults.end(); ++it) {
176​ const QString action = it.key();
177​ QByteArray pid = QDBusConnection::systemBus().baseService().toUtf8();
178​ if (it.value() != actionStatus(action, pid)) {
179​ *it = actionStatus(action, pid);
180​ }
181​ }
182​
183​ // Force updating known actions
184​ Authority::instance()->enumerateActions();
185​ m_flyingActions = true;
186​}
187​
188​} // namespace Auth