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/****************************************************************************
**
** Copyright (C) 2018 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtNetwork module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QDTLS_H
#define QDTLS_H
#include <QtNetwork/qtnetworkglobal.h>
#include <QtNetwork/qsslsocket.h>
#include <QtNetwork/qssl.h>
#include <QtCore/qcryptographichash.h>
#include <QtCore/qobject.h>
Q_MOC_INCLUDE(<QtNetwork/QSslPreSharedKeyAuthenticator>)
#ifndef Q_CLANG_QDOC
QT_REQUIRE_CONFIG(dtls);
#endif
QT_BEGIN_NAMESPACE
enum class QDtlsError : unsigned char
{
NoError,
InvalidInputParameters,
InvalidOperation,
UnderlyingSocketError,
RemoteClosedConnectionError,
PeerVerificationError,
TlsInitializationError,
TlsFatalError,
TlsNonFatalError
};
class QHostAddress;
class QUdpSocket;
class QByteArray;
class QString;
class QDtlsClientVerifierPrivate;
class Q_NETWORK_EXPORT QDtlsClientVerifier : public QObject
{
Q_OBJECT
public:
explicit QDtlsClientVerifier(QObject *parent = nullptr);
~QDtlsClientVerifier();
struct Q_NETWORK_EXPORT GeneratorParameters
{
GeneratorParameters();
GeneratorParameters(QCryptographicHash::Algorithm a, const QByteArray &s);
QCryptographicHash::Algorithm hash = QCryptographicHash::Sha1;
QByteArray secret;
};
bool setCookieGeneratorParameters(const GeneratorParameters ¶ms);
GeneratorParameters cookieGeneratorParameters() const;
bool verifyClient(QUdpSocket *socket, const QByteArray &dgram,
const QHostAddress &address, quint16 port);
QByteArray verifiedHello() const;
QDtlsError dtlsError() const;
QString dtlsErrorString() const;
private:
Q_DECLARE_PRIVATE(QDtlsClientVerifier)
Q_DISABLE_COPY(QDtlsClientVerifier)
};
class QSslPreSharedKeyAuthenticator;
template<class> class QVector;
class QSslConfiguration;
class QSslCipher;
class QSslError;
class QDtlsPrivate;
class Q_NETWORK_EXPORT QDtls : public QObject
{
Q_OBJECT
public:
enum HandshakeState
{
HandshakeNotStarted,
HandshakeInProgress,
PeerVerificationFailed,
HandshakeComplete
};
explicit QDtls(QSslSocket::SslMode mode, QObject *parent = nullptr);
~QDtls();
bool setPeer(const QHostAddress &address, quint16 port,
const QString &verificationName = {});
bool setPeerVerificationName(const QString &name);
QHostAddress peerAddress() const;
quint16 peerPort() const;
QString peerVerificationName() const;
QSslSocket::SslMode sslMode() const;
void setMtuHint(quint16 mtuHint);
quint16 mtuHint() const;
using GeneratorParameters = QDtlsClientVerifier::GeneratorParameters;
bool setCookieGeneratorParameters(const GeneratorParameters ¶ms);
GeneratorParameters cookieGeneratorParameters() const;
bool setDtlsConfiguration(const QSslConfiguration &configuration);
QSslConfiguration dtlsConfiguration() const;
HandshakeState handshakeState() const;
bool doHandshake(QUdpSocket *socket, const QByteArray &dgram = {});
bool handleTimeout(QUdpSocket *socket);
bool resumeHandshake(QUdpSocket *socket);
bool abortHandshake(QUdpSocket *socket);
bool shutdown(QUdpSocket *socket);
bool isConnectionEncrypted() const;
QSslCipher sessionCipher() const;
QSsl::SslProtocol sessionProtocol() const;
qint64 writeDatagramEncrypted(QUdpSocket *socket, const QByteArray &dgram);
QByteArray decryptDatagram(QUdpSocket *socket, const QByteArray &dgram);
QDtlsError dtlsError() const;
QString dtlsErrorString() const;
QVector<QSslError> peerVerificationErrors() const;
void ignoreVerificationErrors(const QVector<QSslError> &errorsToIgnore);
Q_SIGNALS:
void pskRequired(QSslPreSharedKeyAuthenticator *authenticator);
void handshakeTimeout();
private:
bool startHandshake(QUdpSocket *socket, const QByteArray &dgram);
bool continueHandshake(QUdpSocket *socket, const QByteArray &dgram);
Q_DECLARE_PRIVATE(QDtls)
Q_DISABLE_COPY(QDtls)
};
QT_END_NAMESPACE
#endif // QDTLS_H
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