/***************************************************************************
- * Copyright (C) 2005-2014 by the Quassel Project *
+ * Copyright (C) 2005-2020 by the Quassel Project *
* devel@quassel-irc.org *
* *
* This program is free software; you can redistribute it and/or modify *
#include "clientauthhandler.h"
-// TODO: support system application proxy (new in Qt 4.6)
-
-#ifdef HAVE_SSL
- #include <QSslSocket>
-#else
- #include <QTcpSocket>
-#endif
+#include <QtEndian>
+#include <QSslSocket>
#include "client.h"
#include "clientsettings.h"
-
-#include "protocols/legacy/legacypeer.h"
-
-using namespace Protocol;
-
-ClientAuthHandler::ClientAuthHandler(CoreAccount account, QObject *parent)
- : AuthHandler(parent),
- _peer(0),
- _account(account)
+#include "peerfactory.h"
+#include "util.h"
+
+ClientAuthHandler::ClientAuthHandler(CoreAccount account, QObject* parent)
+ : AuthHandler(parent)
+ , _peer(nullptr)
+ , _account(account)
+ , _probing(false)
+ , _legacy(false)
+ , _connectionFeatures(0)
+{}
+
+Peer* ClientAuthHandler::peer() const
{
-
+ return _peer;
}
-
void ClientAuthHandler::connectToCore()
{
CoreAccountSettings s;
-#ifdef HAVE_SSL
- QSslSocket *socket = new QSslSocket(this);
+ auto* socket = new QSslSocket(this);
// make sure the warning is shown if we happen to connect without SSL support later
s.setAccountValue("ShowNoClientSslWarning", true);
-#else
- if (_account.useSsl()) {
- if (s.accountValue("ShowNoClientSslWarning", true).toBool()) {
- bool accepted = false;
- emit handleNoSslInClient(&accepted);
- if (!accepted) {
- emit errorMessage(tr("Unencrypted connection canceled"));
- return;
- }
- s.setAccountValue("ShowNoClientSslWarning", false);
- }
- }
- QTcpSocket *socket = new QTcpSocket(this);
-#endif
-// TODO: Handle system proxy
#ifndef QT_NO_NETWORKPROXY
- if (_account.useProxy()) {
- QNetworkProxy proxy(_account.proxyType(), _account.proxyHostName(), _account.proxyPort(), _account.proxyUser(), _account.proxyPassword());
+ QNetworkProxy proxy;
+ proxy.setType(_account.proxyType());
+ if (_account.proxyType() == QNetworkProxy::Socks5Proxy || _account.proxyType() == QNetworkProxy::HttpProxy) {
+ proxy.setHostName(_account.proxyHostName());
+ proxy.setPort(_account.proxyPort());
+ proxy.setUser(_account.proxyUser());
+ proxy.setPassword(_account.proxyPassword());
+ }
+
+ if (_account.proxyType() == QNetworkProxy::DefaultProxy) {
+ QNetworkProxyFactory::setUseSystemConfiguration(true);
+ }
+ else {
+ QNetworkProxyFactory::setUseSystemConfiguration(false);
socket->setProxy(proxy);
}
#endif
setSocket(socket);
- // handled by the base class for now; may need to rethink for protocol detection
- //connect(socket, SIGNAL(error(QAbstractSocket::SocketError)), SLOT(onSocketError(QAbstractSocket::SocketError)));
- connect(socket, SIGNAL(stateChanged(QAbstractSocket::SocketState)), SLOT(onSocketStateChanged(QAbstractSocket::SocketState)));
- connect(socket, SIGNAL(connected()), SLOT(onSocketConnected()));
+ connect(socket, &QAbstractSocket::stateChanged, this, &ClientAuthHandler::onSocketStateChanged);
+ connect(socket, &QIODevice::readyRead, this, &ClientAuthHandler::onReadyRead);
+ connect(socket, &QAbstractSocket::connected, this, &ClientAuthHandler::onSocketConnected);
emit statusMessage(tr("Connecting to %1...").arg(_account.accountName()));
socket->connectToHost(_account.hostName(), _account.port());
}
-
-// TODO: handle protocol detection
void ClientAuthHandler::onSocketStateChanged(QAbstractSocket::SocketState socketState)
{
QString text;
- switch(socketState) {
- case QAbstractSocket::UnconnectedState:
- text = tr("Disconnected");
- // Ensure the disconnected() signal is sent even if we haven't reached the Connected state yet.
- // The baseclass implementation will make sure to only send the signal once.
- onSocketDisconnected();
- break;
- case QAbstractSocket::HostLookupState:
+ switch (socketState) {
+ case QAbstractSocket::HostLookupState:
+ if (!_legacy)
text = tr("Looking up %1...").arg(_account.hostName());
- break;
- case QAbstractSocket::ConnectingState:
+ break;
+ case QAbstractSocket::ConnectingState:
+ if (!_legacy)
text = tr("Connecting to %1...").arg(_account.hostName());
- break;
- case QAbstractSocket::ConnectedState:
- text = tr("Connected to %1").arg(_account.hostName());
- break;
- case QAbstractSocket::ClosingState:
+ break;
+ case QAbstractSocket::ConnectedState:
+ text = tr("Connected to %1").arg(_account.hostName());
+ break;
+ case QAbstractSocket::ClosingState:
+ if (!_probing)
text = tr("Disconnecting from %1...").arg(_account.hostName());
- break;
- default:
- break;
+ break;
+ case QAbstractSocket::UnconnectedState:
+ if (!_probing) {
+ text = tr("Disconnected");
+ // Ensure the disconnected() signal is sent even if we haven't reached the Connected state yet.
+ // The baseclass implementation will make sure to only send the signal once.
+ // However, we do want to prefer a potential socket error signal that may be on route already, so
+ // give this a chance to overtake us by spinning the loop...
+ QTimer::singleShot(0, this, &ClientAuthHandler::onSocketDisconnected);
+ }
+ break;
+ default:
+ break;
}
if (!text.isEmpty()) {
}
}
-// TODO: handle protocol detection
-/*
void ClientAuthHandler::onSocketError(QAbstractSocket::SocketError error)
{
- emit socketError(error, socket()->errorString());
+ if (_probing && error == QAbstractSocket::RemoteHostClosedError) {
+ _legacy = true;
+ return;
+ }
+
+ _probing = false; // all other errors are unrelated to probing and should be handled
+ AuthHandler::onSocketError(error);
}
-*/
-void ClientAuthHandler::onSocketConnected()
+void ClientAuthHandler::onSocketDisconnected()
{
- // TODO: protocol detection
+ if (_probing && _legacy) {
+ // Remote host has closed the connection while probing
+ _probing = false;
+ disconnect(socket(), &QIODevice::readyRead, this, &ClientAuthHandler::onReadyRead);
+ emit statusMessage(tr("Reconnecting in compatibility mode..."));
+ socket()->connectToHost(_account.hostName(), _account.port());
+ return;
+ }
+
+ AuthHandler::onSocketDisconnected();
+}
+void ClientAuthHandler::onSocketConnected()
+{
if (_peer) {
qWarning() << Q_FUNC_INFO << "Peer already exists!";
return;
socket()->setSocketOption(QAbstractSocket::KeepAliveOption, true);
- _peer = new LegacyPeer(this, socket(), this);
+ if (!_legacy) {
+ // First connection attempt, try probing for a capable core
+ _probing = true;
- connect(_peer, SIGNAL(transferProgress(int,int)), SIGNAL(transferProgress(int,int)));
+ QDataStream stream(socket()); // stream handles the endianness for us
+ stream.setVersion(QDataStream::Qt_4_2);
- // compat only
- connect(_peer, SIGNAL(protocolVersionMismatch(int,int)), SLOT(onProtocolVersionMismatch(int,int)));
+ quint32 magic = Protocol::magic;
+ magic |= Protocol::Encryption;
+ magic |= Protocol::Compression;
- emit statusMessage(tr("Synchronizing to core..."));
+ stream << magic;
- bool useSsl = false;
-#ifdef HAVE_SSL
- useSsl = _account.useSsl();
-#endif
+ // here goes the list of protocols we support, in order of preference
+ PeerFactory::ProtoList protos = PeerFactory::supportedProtocols();
+ for (int i = 0; i < protos.count(); ++i) {
+ quint32 reply = protos[i].first;
+ reply |= protos[i].second << 8;
+ if (i == protos.count() - 1)
+ reply |= 0x80000000; // end list
+ stream << reply;
+ }
- _peer->dispatch(RegisterClient(Quassel::buildInfo().fancyVersionString, useSsl));
-}
+ socket()->flush(); // make sure the probing data is sent immediately
+ return;
+ }
+ // If we arrive here, it's the second connection attempt, meaning probing was not successful -> enable legacy support
-void ClientAuthHandler::onProtocolVersionMismatch(int actual, int expected)
-{
- emit errorPopup(tr("<b>The Quassel Core you are trying to connect to is too old!</b><br>"
- "We need at least protocol v%1, but the core speaks v%2 only.").arg(expected, actual));
- requestDisconnect(tr("Incompatible protocol version, connection to core refused"));
-}
+ qDebug() << "Legacy core detected, switching to compatibility mode";
+ auto* peer = PeerFactory::createPeer(PeerFactory::ProtoDescriptor(Protocol::LegacyProtocol, 0),
+ this,
+ socket(),
+ Compressor::NoCompression,
+ this);
+ // Only needed for the legacy peer, as all others check the protocol version before instantiation
+ connect(peer, &RemotePeer::protocolVersionMismatch, this, &ClientAuthHandler::onProtocolVersionMismatch);
-void ClientAuthHandler::handle(const ClientDenied &msg)
-{
- emit errorPopup(msg.errorString);
- requestDisconnect(tr("The core refused connection from this client"));
+ setPeer(peer);
}
-
-void ClientAuthHandler::handle(const ClientRegistered &msg)
+void ClientAuthHandler::onReadyRead()
{
- _coreConfigured = msg.coreConfigured;
- _backendInfo = msg.backendInfo;
+ if (socket()->bytesAvailable() < 4)
+ return;
- Client::setCoreFeatures(static_cast<Quassel::Features>(msg.coreFeatures));
+ if (!_probing)
+ return; // make sure to not read more data than needed
-#ifdef HAVE_SSL
- CoreAccountSettings s;
- if (_account.useSsl()) {
- if (msg.sslSupported) {
- // Make sure the warning is shown next time we don't have SSL in the core
- s.setAccountValue("ShowNoCoreSslWarning", true);
-
- QSslSocket *sslSocket = qobject_cast<QSslSocket *>(socket());
- Q_ASSERT(sslSocket);
- connect(sslSocket, SIGNAL(encrypted()), SLOT(onSslSocketEncrypted()));
- connect(sslSocket, SIGNAL(sslErrors(QList<QSslError>)), SLOT(onSslErrors()));
- qDebug() << "Starting encryption...";
- sslSocket->flush();
- sslSocket->startClientEncryption();
- }
- else {
- if (s.accountValue("ShowNoCoreSslWarning", true).toBool()) {
- bool accepted = false;
- emit handleNoSslInCore(&accepted);
- if (!accepted) {
- requestDisconnect(tr("Unencrypted connection cancelled"));
- return;
- }
- s.setAccountValue("ShowNoCoreSslWarning", false);
- s.setAccountValue("SslCert", QString());
- }
- onConnectionReady();
- }
- return;
- }
-#endif
- // if we use SSL we wait for the next step until every SSL warning has been cleared
- onConnectionReady();
-}
+ _probing = false;
+ disconnect(socket(), &QIODevice::readyRead, this, &ClientAuthHandler::onReadyRead);
+ quint32 reply;
+ socket()->read((char*)&reply, 4);
+ reply = qFromBigEndian<quint32>(reply);
-#ifdef HAVE_SSL
+ auto type = static_cast<Protocol::Type>(reply & 0xff);
+ auto protoFeatures = static_cast<quint16>(reply >> 8 & 0xffff);
+ _connectionFeatures = static_cast<quint8>(reply >> 24);
-void ClientAuthHandler::onSslSocketEncrypted()
-{
- QSslSocket *socket = qobject_cast<QSslSocket *>(sender());
- Q_ASSERT(socket);
+ Compressor::CompressionLevel level;
+ if (_connectionFeatures & Protocol::Compression)
+ level = Compressor::BestCompression;
+ else
+ level = Compressor::NoCompression;
- if (!socket->sslErrors().count()) {
- // Cert is valid, so we don't want to store it as known
- // That way, a warning will appear in case it becomes invalid at some point
- CoreAccountSettings s;
- s.setAccountValue("SSLCert", QString());
+ RemotePeer* peer = PeerFactory::createPeer(PeerFactory::ProtoDescriptor(type, protoFeatures), this, socket(), level, this);
+ if (!peer) {
+ qWarning() << "No valid protocol supported for this core!";
+ emit errorPopup(tr("<b>Incompatible Quassel Core!</b><br>"
+ "None of the protocols this client speaks are supported by the core you are trying to connect to."));
+
+ requestDisconnect(tr("Core speaks none of the protocols we support"));
+ return;
}
- emit encrypted(true);
- onConnectionReady();
+ if (peer->protocol() == Protocol::LegacyProtocol) {
+ connect(peer, &RemotePeer::protocolVersionMismatch, this, &ClientAuthHandler::onProtocolVersionMismatch);
+ _legacy = true;
+ }
+
+ setPeer(peer);
}
+void ClientAuthHandler::onProtocolVersionMismatch(int actual, int expected)
+{
+ emit errorPopup(tr("<b>The Quassel Core you are trying to connect to is too old!</b><br>"
+ "We need at least protocol v%1, but the core speaks v%2 only.")
+ .arg(expected, actual));
+ requestDisconnect(tr("Incompatible protocol version, connection to core refused"));
+}
-void ClientAuthHandler::onSslErrors()
+void ClientAuthHandler::setPeer(RemotePeer* peer)
{
- QSslSocket *socket = qobject_cast<QSslSocket *>(sender());
- Q_ASSERT(socket);
+ qDebug().nospace() << "Using " << qPrintable(peer->protocolName()) << "...";
- CoreAccountSettings s;
- QByteArray knownDigest = s.accountValue("SslCert").toByteArray();
+ _peer = peer;
+ connect(_peer, &RemotePeer::transferProgress, this, &ClientAuthHandler::transferProgress);
- if (knownDigest != socket->peerCertificate().digest()) {
- bool accepted = false;
- bool permanently = false;
- emit handleSslErrors(socket, &accepted, &permanently);
+ // The legacy protocol enables SSL later, after registration
+ if (_legacy)
+ startRegistration();
+ // otherwise, do it now
+ else
+ checkAndEnableSsl(_connectionFeatures & Protocol::Encryption);
+}
- if (!accepted) {
- requestDisconnect(tr("Unencrypted connection canceled"));
- return;
- }
+void ClientAuthHandler::startRegistration()
+{
+ emit statusMessage(tr("Synchronizing to core..."));
- if (permanently)
- s.setAccountValue("SslCert", socket->peerCertificate().digest());
- else
- s.setAccountValue("SslCert", QString());
- }
+ _peer->dispatch(Protocol::RegisterClient(Quassel::Features{}, Quassel::buildInfo().fancyVersionString, Quassel::buildInfo().commitDate));
+}
- socket->ignoreSslErrors();
+void ClientAuthHandler::handle(const Protocol::ClientDenied& msg)
+{
+ emit errorPopup(msg.errorString);
+ requestDisconnect(tr("The core refused connection from this client"));
}
-#endif /* HAVE_SSL */
+void ClientAuthHandler::handle(const Protocol::ClientRegistered& msg)
+{
+ _coreConfigured = msg.coreConfigured;
+ _backendInfo = msg.backendInfo;
+ _authenticatorInfo = msg.authenticatorInfo;
+ _peer->setFeatures(std::move(msg.features));
+
+ // The legacy protocol enables SSL at this point
+ if (_legacy)
+ checkAndEnableSsl(msg.sslSupported);
+ else
+ onConnectionReady();
+}
void ClientAuthHandler::onConnectionReady()
{
+ const auto& coreFeatures = _peer->features();
+ auto unsupported = coreFeatures.toStringList(false);
+ if (!unsupported.isEmpty()) {
+ qInfo() << qPrintable(tr("Core does not support the following features: %1").arg(unsupported.join(", ")));
+ }
+ if (!coreFeatures.unknownFeatures().isEmpty()) {
+ qInfo() << qPrintable(tr("Core supports unknown features: %1").arg(coreFeatures.unknownFeatures().join(", ")));
+ }
+
emit connectionReady();
emit statusMessage(tr("Connected to %1").arg(_account.accountName()));
if (!_coreConfigured) {
// start wizard
- emit startCoreSetup(_backendInfo);
+ emit startCoreSetup(_backendInfo, _authenticatorInfo);
}
- else // TODO: check if we need LoginEnabled
+ else // TODO: check if we need LoginEnabled
login();
}
-
-void ClientAuthHandler::setupCore(const SetupData &setupData)
+void ClientAuthHandler::setupCore(const Protocol::SetupData& setupData)
{
_peer->dispatch(setupData);
}
-
-void ClientAuthHandler::handle(const SetupFailed &msg)
+void ClientAuthHandler::handle(const Protocol::SetupFailed& msg)
{
emit coreSetupFailed(msg.errorString);
}
-
-void ClientAuthHandler::handle(const SetupDone &msg)
+void ClientAuthHandler::handle(const Protocol::SetupDone& msg)
{
Q_UNUSED(msg)
emit coreSetupSuccessful();
}
-
-void ClientAuthHandler::login(const QString &user, const QString &password, bool remember)
+void ClientAuthHandler::login(const QString& user, const QString& password, bool remember)
{
_account.setUser(user);
_account.setPassword(password);
login();
}
-
-void ClientAuthHandler::login(const QString &previousError)
+void ClientAuthHandler::login(const QString& previousError)
{
emit statusMessage(tr("Logging in..."));
if (_account.user().isEmpty() || _account.password().isEmpty() || !previousError.isEmpty()) {
bool valid = false;
- emit userAuthenticationRequired(&_account, &valid, previousError); // *must* be a synchronous call
+ emit userAuthenticationRequired(&_account, &valid, previousError); // *must* be a synchronous call
if (!valid || _account.user().isEmpty() || _account.password().isEmpty()) {
requestDisconnect(tr("Login canceled"));
return;
}
}
- _peer->dispatch(Login(_account.user(), _account.password()));
+ _peer->dispatch(Protocol::Login(_account.user(), _account.password()));
}
-
-void ClientAuthHandler::handle(const LoginFailed &msg)
+void ClientAuthHandler::handle(const Protocol::LoginFailed& msg)
{
login(msg.errorString);
}
-
-void ClientAuthHandler::handle(const LoginSuccess &msg)
+void ClientAuthHandler::handle(const Protocol::LoginSuccess& msg)
{
Q_UNUSED(msg)
emit loginSuccessful(_account);
}
-
-void ClientAuthHandler::handle(const SessionState &msg)
+void ClientAuthHandler::handle(const Protocol::SessionState& msg)
{
- disconnect(socket(), 0, this, 0); // this is the last message we shall ever get
+ disconnect(socket(), nullptr, this, nullptr); // this is the last message we shall ever get
// give up ownership of the peer; CoreSession takes responsibility now
- _peer->setParent(0);
+ _peer->setParent(nullptr);
emit handshakeComplete(_peer, msg);
}
+
+/*** SSL Stuff ***/
+
+void ClientAuthHandler::checkAndEnableSsl(bool coreSupportsSsl)
+{
+ CoreAccountSettings s;
+ if (coreSupportsSsl) {
+ // Make sure the warning is shown next time we don't have SSL in the core
+ s.setAccountValue("ShowNoCoreSslWarning", true);
+
+ connect(socket(), &QSslSocket::encrypted, this, &ClientAuthHandler::onSslSocketEncrypted);
+ connect(socket(), selectOverload<const QList<QSslError>&>(&QSslSocket::sslErrors), this, &ClientAuthHandler::onSslErrors);
+ qDebug() << "Starting encryption...";
+ socket()->flush();
+ socket()->startClientEncryption();
+ }
+ else {
+ if (s.accountValue("ShowNoCoreSslWarning", true).toBool()) {
+ bool accepted = false;
+ emit handleNoSslInCore(&accepted);
+ if (!accepted) {
+ requestDisconnect(tr("Unencrypted connection cancelled"));
+ return;
+ }
+ s.setAccountValue("ShowNoCoreSslWarning", false);
+ s.setAccountValue("SslCert", QString());
+ s.setAccountValue("SslCertDigestVersion", QVariant(QVariant::Int));
+ }
+ if (_legacy)
+ onConnectionReady();
+ else
+ startRegistration();
+ }
+}
+
+
+void ClientAuthHandler::onSslSocketEncrypted()
+{
+ auto* socket = qobject_cast<QSslSocket*>(sender());
+ Q_ASSERT(socket);
+
+ if (!socket->sslErrors().count()) {
+ // Cert is valid, so we don't want to store it as known
+ // That way, a warning will appear in case it becomes invalid at some point
+ CoreAccountSettings s;
+ s.setAccountValue("SSLCert", QString());
+ s.setAccountValue("SslCertDigestVersion", QVariant(QVariant::Int));
+ }
+
+ emit encrypted(true);
+
+ if (_legacy)
+ onConnectionReady();
+ else
+ startRegistration();
+}
+
+void ClientAuthHandler::onSslErrors()
+{
+ CoreAccountSettings s;
+ QByteArray knownDigest = s.accountValue("SslCert").toByteArray();
+ ClientAuthHandler::DigestVersion knownDigestVersion = static_cast<ClientAuthHandler::DigestVersion>(
+ s.accountValue("SslCertDigestVersion").toInt());
+
+ QByteArray calculatedDigest;
+ switch (knownDigestVersion) {
+ case ClientAuthHandler::DigestVersion::Md5:
+ calculatedDigest = socket()->peerCertificate().digest(QCryptographicHash::Md5);
+ break;
+
+ case ClientAuthHandler::DigestVersion::Sha2_512:
+ calculatedDigest = socket()->peerCertificate().digest(QCryptographicHash::Sha512);
+ break;
+
+ default:
+ qWarning() << "Certificate digest version" << QString(knownDigestVersion) << "is not supported";
+ }
+
+ if (knownDigest != calculatedDigest) {
+ bool accepted = false;
+ bool permanently = false;
+ emit handleSslErrors(socket(), &accepted, &permanently);
+
+ if (!accepted) {
+ requestDisconnect(tr("Unencrypted connection canceled"));
+ return;
+ }
+
+ if (permanently) {
+ s.setAccountValue("SslCert", socket()->peerCertificate().digest(QCryptographicHash::Sha512));
+ s.setAccountValue("SslCertDigestVersion", ClientAuthHandler::DigestVersion::Latest);
+ }
+ else {
+ s.setAccountValue("SslCert", QString());
+ s.setAccountValue("SslCertDigestVersion", QVariant(QVariant::Int));
+ }
+ }
+ else if (knownDigestVersion != ClientAuthHandler::DigestVersion::Latest) {
+ s.setAccountValue("SslCert", socket()->peerCertificate().digest(QCryptographicHash::Sha512));
+ s.setAccountValue("SslCertDigestVersion", ClientAuthHandler::DigestVersion::Latest);
+ }
+
+ socket()->ignoreSslErrors();
+}
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