QCA

tlssocket.cpp
1 /*
2  Copyright (C) 2007 Justin Karneges <[email protected]>
3 
4  Permission is hereby granted, free of charge, to any person obtaining a copy
5  of this software and associated documentation files (the "Software"), to deal
6  in the Software without restriction, including without limitation the rights
7  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8  copies of the Software, and to permit persons to whom the Software is
9  furnished to do so, subject to the following conditions:
10 
11  The above copyright notice and this permission notice shall be included in
12  all copies or substantial portions of the Software.
13 
14  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17  AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
18  AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
19  CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
20 */
21 
22 #include "tlssocket.h"
23 
24 #ifdef QT_STATICPLUGIN
25 #include "import_plugins.h"
26 #endif
27 
28 class TLSSocket::Private : public QObject
29 {
30  Q_OBJECT
31 public:
32  TLSSocket * q;
33  QTcpSocket * sock;
34  QCA::TLS * tls;
35  QString host;
36  bool encrypted;
37  bool error, done;
38  QByteArray readbuf, writebuf;
39  QCA::Synchronizer sync;
40  bool waiting;
41 
42  Private(TLSSocket *_q)
43  : QObject(_q)
44  , q(_q)
45  , sync(_q)
46  {
47  sock = new QTcpSocket(this);
48  connect(sock, &QTcpSocket::connected, this, &TLSSocket::Private::sock_connected);
49  connect(sock, &QTcpSocket::readyRead, this, &TLSSocket::Private::sock_readyRead);
50  connect(sock, &QTcpSocket::bytesWritten, this, &TLSSocket::Private::sock_bytesWritten);
51 #if QT_VERSION >= QT_VERSION_CHECK(5, 15, 0)
52  connect(sock, &QTcpSocket::errorOccurred, this, &TLSSocket::Private::sock_error);
53 #else
54  connect(sock,
55  QOverload<QAbstractSocket::SocketError>::of(&QTcpSocket::error),
56  this,
57  &TLSSocket::Private::sock_error);
58 #endif
59 
60  tls = new QCA::TLS(this);
61  connect(tls, &QCA::TLS::handshaken, this, &TLSSocket::Private::tls_handshaken);
62  connect(tls, &QCA::TLS::readyRead, this, &TLSSocket::Private::tls_readyRead);
63  connect(tls, &QCA::TLS::readyReadOutgoing, this, &TLSSocket::Private::tls_readyReadOutgoing);
64  connect(tls, &QCA::TLS::closed, this, &TLSSocket::Private::tls_closed);
65  connect(tls, &QCA::TLS::error, this, &TLSSocket::Private::tls_error);
67  encrypted = false;
68  error = false;
69  waiting = false;
70  done = false;
71  }
72 
73  bool waitForReadyRead(int msecs)
74  {
75  waiting = true;
76  bool ok = sync.waitForCondition(msecs);
77  // while(1)
78  // QCoreApplication::instance()->processEvents();
79  waiting = false;
80  if (error || done)
81  return false;
82  return ok;
83  }
84 
85 private Q_SLOTS:
86  void sock_connected()
87  {
88  // printf("sock connected\n");
89  tls->startClient(host);
90  }
91 
92  void sock_readyRead()
93  {
94  // printf("sock ready read\n");
95  QByteArray buf = sock->readAll();
96  // printf("%d bytes\n", buf.size());
97  tls->writeIncoming(buf);
98  }
99 
100  void sock_bytesWritten(qint64 x)
101  {
102  Q_UNUSED(x);
103  // printf("sock bytes written: %d\n", (int)x);
104  }
105 
106  void sock_error(QAbstractSocket::SocketError x)
107  {
108  // printf("sock error: %d\n", x);
109  Q_UNUSED(x);
110  done = true;
111  if (waiting)
112  sync.conditionMet();
113  }
114 
115  void tls_handshaken()
116  {
117  // printf("tls handshaken\n");
118  if (tls->peerIdentityResult() != QCA::TLS::Valid) {
119  printf("not valid\n");
120  sock->abort();
121  tls->reset();
122  error = true;
123  } else {
124  // printf("valid\n");
125  encrypted = true;
126  // printf("%d bytes in writebuf\n", writebuf.size());
127  if (!writebuf.isEmpty()) {
128  // printf("[%s]\n", writebuf.data());
129  tls->write(writebuf);
130  writebuf.clear();
131  }
132  }
133  if (waiting)
134  sync.conditionMet();
135  }
136 
137  void tls_readyRead()
138  {
139  // printf("tls ready read\n");
140  if (waiting)
141  sync.conditionMet();
142  }
143 
144  void tls_readyReadOutgoing()
145  {
146  // printf("tls ready read outgoing\n");
147  QByteArray buf = tls->readOutgoing();
148  // printf("%d bytes\n", buf.size());
149  sock->write(buf);
150  }
151 
152  void tls_closed()
153  {
154  // printf("tls closed\n");
155  }
156 
157  void tls_error()
158  {
159  // printf("tls error\n");
160  }
161 };
162 
163 TLSSocket::TLSSocket(QObject *parent)
164  : QTcpSocket(parent)
165 {
166  d = new Private(this);
167 }
168 
169 TLSSocket::~TLSSocket()
170 {
171  delete d;
172 }
173 
174 void TLSSocket::connectToHostEncrypted(const QString &host, quint16 port)
175 {
176  d->host = host;
177  setOpenMode(QIODevice::ReadWrite);
178  d->sock->connectToHost(host, port);
179 }
180 
181 QCA::TLS *TLSSocket::tls()
182 {
183  return d->tls;
184 }
185 
186 bool TLSSocket::waitForReadyRead(int msecs)
187 {
188  /*if(d->readbuf.isEmpty())
189  return false;
190 
191  if(d->tls->bytesAvailable() == 0)
192  return false;*/
193 
194  return d->waitForReadyRead(msecs);
195 }
196 
197 qint64 TLSSocket::readData(char *data, qint64 maxlen)
198 {
199  if (!d->error)
200  d->readbuf += d->tls->read();
201  unsigned char *p = (unsigned char *)d->readbuf.data();
202  int size = d->readbuf.size();
203  int readsize = qMin(size, (int)maxlen);
204  int newsize = size - readsize;
205  memcpy(data, p, readsize);
206  memmove(p, p + readsize, newsize);
207  d->readbuf.resize(newsize);
208  return readsize;
209 }
210 
211 qint64 TLSSocket::writeData(const char *data, qint64 len)
212 {
213  // printf("write %d bytes\n", (int)len);
214  QByteArray buf(data, len);
215  if (d->encrypted)
216  d->tls->write(buf);
217  else
218  d->writebuf += buf;
219  return len;
220 }
221 
222 #include "tlssocket.moc"
void handshaken()
Emitted when the protocol handshake is complete.
void clear()
void setTrustedCertificates(const CertificateCollection &trusted)
Set up the set of trusted certificates that will be used to verify that the certificate provided is v...
void readyRead()
This signal is emitted when SecureLayer has decrypted (application side) data ready to be read...
identity is verified
bool isEmpty() const const
QAbstractSocket::SocketError error() const const
void closed()
This signal is emitted when the SecureLayer connection is closed.
void conditionMet()
Call to continue execution in the paused thread.
Transport Layer Security / Secure Socket Layer.
Q_OBJECTQ_OBJECT
QByteArray read() override
This method reads decrypted (plain) data from the SecureLayer implementation.
IdentityResult peerIdentityResult() const
After the SSL/TLS handshake is complete, this method allows you to determine if the other end of the ...
void readyReadOutgoing()
This signal is emitted when SecureLayer has encrypted (network side) data ready to be read...
bool waitForCondition(int msecs=-1)
Call to pause execution in this thread.
QByteArray readAll()
void error(QWidget *parent, const QString &text, const QString &caption=QString(), Options options=Notify)
void writeIncoming(const QByteArray &a) override
This method accepts encoded (typically encrypted) data for processing.
void bytesWritten(qint64 bytes)
void reset()
Reset the connection.
QCA_EXPORT CertificateCollection systemStore()
Get system-wide root Certificate Authority (CA) certificates.
Enable synchronization between two threads.
Definition: qca_support.h:361
void startClient(const QString &host=QString())
Start the TLS/SSL connection as a client.
void errorOccurred(QAbstractSocket::SocketError socketError)
QByteArray readOutgoing(int *plainBytes=nullptr) override
This method provides encoded (typically encrypted) data.
void error()
This signal is emitted when an error is detected.
char * data()
qint64 write(const char *data, qint64 maxSize)
void write(const QByteArray &a) override
This method writes unencrypted (plain) data to the SecureLayer implementation.
void readyRead()
Q_SLOTSQ_SLOTS
QMetaObject::Connection connect(const QObject *sender, const char *signal, const QObject *receiver, const char *method, Qt::ConnectionType type)
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