-
Notifications
You must be signed in to change notification settings - Fork 225
/
Copy pathcoreauthhandler.cpp
346 lines (294 loc) · 13.4 KB
/
coreauthhandler.cpp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
/***************************************************************************
* Copyright (C) 2005-2022 by the Quassel Project *
* devel@quassel-irc.org *
* *
* 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) version 3. *
* *
* 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, write to the *
* Free Software Foundation, Inc., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
***************************************************************************/
#include "coreauthhandler.h"
#include <QtEndian>
#include <QSslSocket>
#include "core.h"
CoreAuthHandler::CoreAuthHandler(QSslSocket* socket, QObject* parent)
: AuthHandler(parent)
, _peer(nullptr)
, _metricsServer(Core::instance()->metricsServer())
, _proxyReceived(false)
, _proxyLine({})
, _useProxyLine(false)
, _magicReceived(false)
, _legacy(false)
, _clientRegistered(false)
, _connectionFeatures(0)
{
setSocket(socket);
connect(socket, &QIODevice::readyRead, this, &CoreAuthHandler::onReadyRead);
// TODO: Timeout for the handshake phase
}
void CoreAuthHandler::onReadyRead()
{
// once we have selected a peer, we certainly don't want to read more data!
if (_peer)
return;
if (!_proxyReceived) {
quint32 magic;
socket()->peek((char*) &magic, 4);
magic = qFromBigEndian<quint32>(magic);
if (magic == Protocol::proxyMagic) {
if (!socket()->canReadLine()) {
return;
}
QByteArray line = socket()->readLine(108);
_proxyLine = ProxyLine::parseProxyLine(line);
if (_proxyLine.protocol != QAbstractSocket::UnknownNetworkLayerProtocol) {
QList<QString> subnets = Quassel::optionValue("proxy-cidr").split(",");
for (const QString& subnet : subnets) {
if (socket()->peerAddress().isInSubnet(QHostAddress::parseSubnet(subnet))) {
_useProxyLine = true;
break;
}
}
}
}
_proxyReceived = true;
}
if (socket()->bytesAvailable() < 4)
return;
if (!_magicReceived) {
quint32 magic;
socket()->peek((char*)&magic, 4);
magic = qFromBigEndian<quint32>(magic);
if ((magic & 0xffffff00) != Protocol::magic) {
// no magic, assume legacy protocol
qDebug() << "Legacy client detected, switching to compatibility mode";
_legacy = true;
RemotePeer* peer = PeerFactory::createPeer(PeerFactory::ProtoDescriptor(Protocol::LegacyProtocol, 0),
this,
socket(),
Compressor::NoCompression,
this);
connect(peer, &RemotePeer::protocolVersionMismatch, this, &CoreAuthHandler::onProtocolVersionMismatch);
setPeer(peer);
return;
}
_magicReceived = true;
quint8 features = magic & 0xff;
// figure out which connection features we'll use based on the client's support
if (Core::sslSupported() && (features & Protocol::Encryption))
_connectionFeatures |= Protocol::Encryption;
if (features & Protocol::Compression)
_connectionFeatures |= Protocol::Compression;
socket()->read((char*)&magic, 4); // read the 4 bytes we've just peeked at
}
// read the list of protocols supported by the client
while (socket()->bytesAvailable() >= 4 && _supportedProtos.size() < 16) { // sanity check
quint32 data;
socket()->read((char*)&data, 4);
data = qFromBigEndian<quint32>(data);
auto type = static_cast<Protocol::Type>(data & 0xff);
auto protoFeatures = static_cast<quint16>(data >> 8 & 0xffff);
_supportedProtos.append(PeerFactory::ProtoDescriptor(type, protoFeatures));
if (data >= 0x80000000) { // last protocol
Compressor::CompressionLevel level;
if (_connectionFeatures & Protocol::Compression)
level = Compressor::BestCompression;
else
level = Compressor::NoCompression;
RemotePeer* peer = PeerFactory::createPeer(_supportedProtos, this, socket(), level, this);
if (!peer) {
qWarning() << "Received invalid handshake data from client" << hostAddress().toString();
close();
return;
}
if (peer->protocol() == Protocol::LegacyProtocol) {
_legacy = true;
connect(peer, &RemotePeer::protocolVersionMismatch, this, &CoreAuthHandler::onProtocolVersionMismatch);
}
setPeer(peer);
// inform the client
quint32 reply = peer->protocol() | peer->enabledFeatures() << 8 | _connectionFeatures << 24;
reply = qToBigEndian<quint32>(reply);
socket()->write((char*)&reply, 4);
socket()->flush();
if (!_legacy && (_connectionFeatures & Protocol::Encryption))
startSsl(); // legacy peer enables it later
return;
}
}
}
void CoreAuthHandler::setPeer(RemotePeer* peer)
{
qDebug().nospace() << "Using " << qPrintable(peer->protocolName()) << "...";
_peer = peer;
if (_proxyLine.protocol != QAbstractSocket::UnknownNetworkLayerProtocol) {
_peer->setProxyLine(_proxyLine);
}
disconnect(socket(), &QIODevice::readyRead, this, &CoreAuthHandler::onReadyRead);
}
// only in compat mode
void CoreAuthHandler::onProtocolVersionMismatch(int actual, int expected)
{
qWarning() << qPrintable(tr("Client")) << _peer->description() << qPrintable(tr("too old, rejecting."));
QString errorString = tr("<b>Your Quassel Client is too old!</b><br>"
"This core needs at least client/core protocol version %1 (got: %2).<br>"
"Please consider upgrading your client.")
.arg(expected, actual);
_peer->dispatch(Protocol::ClientDenied(errorString));
_peer->close();
}
bool CoreAuthHandler::checkClientRegistered()
{
if (!_clientRegistered) {
qWarning() << qPrintable(tr("Client")) << qPrintable(hostAddress().toString())
<< qPrintable(tr("did not send a registration message before trying to login, rejecting."));
_peer->dispatch(
Protocol::ClientDenied(tr("<b>Client not initialized!</b><br>You need to send a registration message before trying to login.")));
_peer->close();
return false;
}
return true;
}
void CoreAuthHandler::handle(const Protocol::RegisterClient& msg)
{
bool useSsl;
if (_legacy)
useSsl = Core::sslSupported() && msg.sslSupported;
else
useSsl = _connectionFeatures & Protocol::Encryption;
if (Quassel::isOptionSet("require-ssl") && !useSsl && !_peer->isLocal()) {
qInfo() << qPrintable(tr("SSL required but non-SSL connection attempt from %1").arg(hostAddress().toString()));
_peer->dispatch(Protocol::ClientDenied(tr("<b>SSL is required!</b><br>You need to use SSL in order to connect to this core.")));
_peer->close();
return;
}
_peer->setFeatures(std::move(msg.features));
_peer->setBuildDate(msg.buildDate);
_peer->setClientVersion(msg.clientVersion);
QVariantList backends;
QVariantList authenticators;
bool configured = Core::isConfigured();
if (!configured) {
backends = Core::backendInfo();
if (_peer->hasFeature(Quassel::Feature::Authenticators)) {
authenticators = Core::authenticatorInfo();
}
}
_peer->dispatch(Protocol::ClientRegistered(Quassel::Features{}, configured, backends, authenticators, useSsl));
// useSsl is only used for the legacy protocol
if (_legacy && useSsl)
startSsl();
_clientRegistered = true;
}
void CoreAuthHandler::handle(const Protocol::SetupData& msg)
{
if (!checkClientRegistered())
return;
// The default parameter to authenticator is Database.
// Maybe this should be hardcoded elsewhere, i.e. as a define.
QString authenticator = msg.authenticator;
qInfo() << "[" << authenticator << "]";
if (authenticator.trimmed().isEmpty()) {
authenticator = QString("Database");
}
QString result = Core::setup(msg.adminUser, msg.adminPassword, msg.backend, msg.setupData, authenticator, msg.authSetupData);
if (!result.isEmpty())
_peer->dispatch(Protocol::SetupFailed(result));
else
_peer->dispatch(Protocol::SetupDone());
}
void CoreAuthHandler::handle(const Protocol::Login& msg)
{
if (!checkClientRegistered())
return;
if (!Core::isConfigured()) {
qWarning() << qPrintable(tr("Client")) << qPrintable(hostAddress().toString())
<< qPrintable(tr("attempted to login before the core was configured, rejecting."));
_peer->dispatch(Protocol::ClientDenied(
tr("<b>Attempted to login before core was configured!</b><br>The core must be configured before attempting to login.")));
return;
}
// First attempt local auth using the real username and password.
// If that fails, move onto the auth provider.
// Check to see if the user has the "Database" authenticator configured.
UserId uid = 0;
if (Core::getUserAuthenticator(msg.user) == "Database") {
uid = Core::validateUser(msg.user, msg.password);
}
// If they did not, *or* if the database login fails, try to use a different authenticator.
// TODO: this logic should likely be moved into Core::authenticateUser in the future.
// Right now a core can only have one authenticator configured; this might be something
// to change in the future.
if (uid == 0) {
uid = Core::authenticateUser(msg.user, msg.password);
}
if (uid == 0) {
qInfo() << qPrintable(tr("Invalid login attempt from %1 as \"%2\"").arg(hostAddress().toString(), msg.user));
_peer->dispatch(Protocol::LoginFailed(tr(
"<b>Invalid username or password!</b><br>The username/password combination you supplied could not be found in the database.")));
if (_metricsServer) {
_metricsServer->addLoginAttempt(msg.user, false);
}
return;
}
_peer->dispatch(Protocol::LoginSuccess());
if (_metricsServer) {
_metricsServer->addLoginAttempt(uid, true);
}
qInfo() << qPrintable(tr("Client %1 initialized and authenticated successfully as \"%2\" (UserId: %3).")
.arg(_peer->address(), msg.user, QString::number(uid.toInt())));
const auto& clientFeatures = _peer->features();
auto unsupported = clientFeatures.toStringList(false);
if (!unsupported.isEmpty()) {
if (unsupported.contains("NoFeatures"))
qInfo() << qPrintable(tr("Client does not support extended features."));
else
qInfo() << qPrintable(tr("Client does not support the following features: %1").arg(unsupported.join(", ")));
}
if (!clientFeatures.unknownFeatures().isEmpty()) {
qInfo() << qPrintable(tr("Client supports unknown features: %1").arg(clientFeatures.unknownFeatures().join(", ")));
}
disconnect(socket(), nullptr, this, nullptr);
disconnect(_peer, nullptr, this, nullptr);
_peer->setParent(nullptr); // Core needs to take care of this one now!
socket()->flush(); // Make sure all data is sent before handing over the peer (and socket) to the session thread (bug 682)
emit handshakeComplete(_peer, uid);
}
QHostAddress CoreAuthHandler::hostAddress() const
{
if (_useProxyLine) {
return _proxyLine.sourceHost;
}
else if (socket()) {
return socket()->peerAddress();
}
return {};
}
bool CoreAuthHandler::isLocal() const
{
return hostAddress() == QHostAddress::LocalHost ||
hostAddress() == QHostAddress::LocalHostIPv6;
}
/*** SSL Stuff ***/
void CoreAuthHandler::startSsl()
{
qDebug() << qPrintable(tr("Starting encryption for Client:")) << _peer->description();
connect(socket(), selectOverload<const QList<QSslError>&>(&QSslSocket::sslErrors), this, &CoreAuthHandler::onSslErrors);
socket()->flush(); // ensure that the write cache is flushed before we switch to ssl (bug 682)
socket()->startServerEncryption();
}
void CoreAuthHandler::onSslErrors()
{
socket()->ignoreSslErrors();
}