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/*
* Copyright (C) 2015 by Christian Kamm <kamm@incasoftware.de>
*
* 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.
*/
#pragma once
#include "owncloudgui.h"
#include <QObject>
#include <QString>
#include <QNetworkProxy>
#include <QAuthenticator>
#include <QPointer>
#include <QScopedPointer>
#include <QSettings>
#include <QSet>
namespace QKeychain {
class Job;
class ReadPasswordJob;
}
namespace OCC {
class ConfigFile;
class ProxyAuthDialog;
/**
* @brief Handle proxyAuthenticationRequired signals from our QNetworkAccessManagers.
*
* The main complication here is that the slot needs to return credential information
* synchronously - but running a dialog or getting password data from synchronous
* storage are asynchronous operations. This leads to reentrant calls that are
* fairly complicated to handle.
*/
class ProxyAuthHandler : public QObject
{
Q_OBJECT
public:
static ProxyAuthHandler *instance();
~ProxyAuthHandler() override;
public slots:
/// Intended for QNetworkAccessManager::proxyAuthenticationRequired()
void handleProxyAuthenticationRequired(const QNetworkProxy &proxy,
QAuthenticator *authenticator);
private slots:
void slotKeychainJobDone();
void slotSenderDestroyed(QObject *);
private:
ProxyAuthHandler();
/// Runs the ProxyAuthDialog and returns true if new credentials were entered.
bool getCredsFromDialog();
/// Checks the keychain for credentials of the current proxy.
bool getCredsFromKeychain();
/// Stores the current credentials in the keychain.
void storeCredsInKeychain();
QString keychainUsernameKey() const;
QString keychainPasswordKey() const;
/// The hostname:port of the current proxy, used for detecting switches
/// to a different proxy.
QString _proxy;
QString _username;
QString _password;
/// If the user cancels the credential dialog, blocked will be set to
/// true and we won't bother him again.
bool _blocked;
/// In several instances handleProxyAuthenticationRequired() can be called
/// while it is still running. These counters detect what we're currently
/// waiting for.
int _waitingForDialog;
int _waitingForKeychain;
bool _keychainJobRunning;
QPointer<ProxyAuthDialog> _dialog;
/// The QSettings instance to securely store username/password in the keychain.
QScopedPointer<QSettings> _settings;
/// Pointer to the most-recently-run ReadPasswordJob, needed due to reentrancy.
QScopedPointer<QKeychain::ReadPasswordJob> _readPasswordJob;
/// For checking the proxy config settings.
QScopedPointer<ConfigFile> _configFile;
/// To distinguish between a new QNAM asking for credentials and credentials
/// failing for an existing QNAM, we keep track of the senders of the
/// proxyAuthRequired signal here.
QSet<QObject *> _gaveCredentialsTo;
};
} // namespace OCC
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