/****************************************************************************
**
** Copyright (C) 1992-2008 Trolltech ASA. All rights reserved.
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** This file is part of the QtNetwork module of the Qt Toolkit.
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** License versions 2.0 or 3.0 as published by the Free Software
** Foundation and appearing in the files LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file.  Alternatively you may (at
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** License if such license has been publicly approved by Trolltech ASA
** (or its successors, if any) and the KDE Free Qt Foundation. In
** addition, as a special exception, Trolltech gives you certain
** additional rights. These rights are described in the Trolltech GPL
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** http://www.trolltech.com/products/qt/gplexception/ and in the file
** GPL_EXCEPTION.txt in this package.
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****************************************************************************/

/****************************************************************************
**
** In addition, as a special exception, Trolltech gives permission to link
** the code of its release of Qt with the OpenSSL project's "OpenSSL" library
** (or modified versions of the "OpenSSL" library that use the same license
** as the original version), and distribute the linked executables.
**
** You must comply with the GNU General Public License version 2 in all
** respects for all of the code used other than the "OpenSSL" code.  If you
** modify this file, you may extend this exception to your version of the file,
** but you are not obligated to do so.  If you do not wish to do so, delete
** this exception statement from your version of this file.
**
****************************************************************************/

#ifndef QSSLSOCKET_H
#define QSSLSOCKET_H

#include <QtCore/qlist.h>
#include <QtCore/qregexp.h>

QT_BEGIN_HEADER

QT_MODULE(Network)

#ifndef QT_NO_OPENSSL

#include <QtNetwork/qtcpsocket.h>
#include <QtNetwork/qsslerror.h>

class QDir;
class QSslCipher;
class QSslCertificate;

Q_DECLARE_METATYPE(QList<QSslError>)

class QSslSocketPrivate;
class Q_NETWORK_EXPORT QSslSocket : public QTcpSocket
{
    Q_OBJECT
public:
    enum SslMode {
        UnencryptedMode,
        SslClientMode,
        SslServerMode
    };

    QSslSocket(QObject *parent = 0);
    ~QSslSocket();

    // Autostarting the SSL client handshake.
    void connectToHostEncrypted(const QString &hostName, quint16 port, OpenMode mode = ReadWrite);
    bool setSocketDescriptor(int socketDescriptor, SocketState state = ConnectedState,
                             OpenMode openMode = ReadWrite);

    SslMode mode() const;
    bool isEncrypted() const;

    QSsl::SslProtocol protocol() const;
    void setProtocol(QSsl::SslProtocol protocol);

    // From QIODevice
    qint64 bytesAvailable() const;
    qint64 bytesToWrite() const;
    bool canReadLine() const;
    void close();
    bool atEnd() const;
    bool flush();
    void abort();

    // Certificate & cipher accessors.
    void setLocalCertificate(const QSslCertificate &certificate);
    void setLocalCertificate(const QString &fileName, QSsl::EncodingFormat format = QSsl::Pem);
    QSslCertificate localCertificate() const;
    QSslCertificate peerCertificate() const;
    QList<QSslCertificate> peerCertificateChain() const;
    QSslCipher sessionCipher() const;

    // Private keys, for server sockets.
    void setPrivateKey(const QSslKey &key);
    void setPrivateKey(const QString &fileName, QSsl::KeyAlgorithm algorithm = QSsl::Rsa,
                       QSsl::EncodingFormat format = QSsl::Pem,
                       const QByteArray &passPhrase = QByteArray());
    QSslKey privateKey() const;

    // Cipher settings.
    QList<QSslCipher> ciphers() const;
    void setCiphers(const QList<QSslCipher> &ciphers);
    void setCiphers(const QString &ciphers);
    static void setDefaultCiphers(const QList<QSslCipher> &ciphers);
    static QList<QSslCipher> defaultCiphers();
    static QList<QSslCipher> supportedCiphers();

    // CA settings.
    bool addCaCertificates(const QString &path, QSsl::EncodingFormat format = QSsl::Pem,
                           QRegExp::PatternSyntax syntax = QRegExp::FixedString);
    void addCaCertificate(const QSslCertificate &certificate);
    void addCaCertificates(const QList<QSslCertificate> &certificates);
    void setCaCertificates(const QList<QSslCertificate> &certificates);
    QList<QSslCertificate> caCertificates() const;
    static bool addDefaultCaCertificates(const QString &path, QSsl::EncodingFormat format = QSsl::Pem,
                                         QRegExp::PatternSyntax syntax = QRegExp::FixedString);
    static void addDefaultCaCertificate(const QSslCertificate &certificate);
    static void addDefaultCaCertificates(const QList<QSslCertificate> &certificates);
    static void setDefaultCaCertificates(const QList<QSslCertificate> &certificates);
    static QList<QSslCertificate> defaultCaCertificates();
    static QList<QSslCertificate> systemCaCertificates();

    bool waitForConnected(int msecs = 30000);
    bool waitForEncrypted(int msecs = 30000);
    bool waitForReadyRead(int msecs = 30000);
    bool waitForBytesWritten(int msecs = 30000);
    bool waitForDisconnected(int msecs = 30000);

    QList<QSslError> sslErrors() const;

    static bool supportsSsl();

public Q_SLOTS:
    void startClientEncryption();
    void startServerEncryption();
    void ignoreSslErrors();

Q_SIGNALS:
    void encrypted();
    void sslErrors(const QList<QSslError> &errors);
    void modeChanged(QSslSocket::SslMode newMode);

protected Q_SLOTS:
    void connectToHostImplementation(const QString &hostName, quint16 port,
                                     OpenMode openMode);
    void disconnectFromHostImplementation();

protected:
    qint64 readData(char *data, qint64 maxlen);
    qint64 writeData(const char *data, qint64 len);

private:
    Q_DECLARE_PRIVATE(QSslSocket)
    Q_DISABLE_COPY(QSslSocket)
    Q_PRIVATE_SLOT(d_func(), void _q_connectedSlot())
    Q_PRIVATE_SLOT(d_func(), void _q_hostFoundSlot())
    Q_PRIVATE_SLOT(d_func(), void _q_disconnectedSlot())
    Q_PRIVATE_SLOT(d_func(), void _q_stateChangedSlot(QAbstractSocket::SocketState))
    Q_PRIVATE_SLOT(d_func(), void _q_errorSlot(QAbstractSocket::SocketError))
    Q_PRIVATE_SLOT(d_func(), void _q_readyReadSlot())
    Q_PRIVATE_SLOT(d_func(), void _q_bytesWrittenSlot(qint64))
    friend class QSslSocketBackendPrivate;
};

#endif // QT_NO_OPENSSL

QT_END_HEADER

#endif
