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/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of Qt Creator.
**
** 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 Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/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 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
****************************************************************************/
#ifndef SSHPACKET_P_H
#define SSHPACKET_P_H
#include "sshexception_p.h"
#include <QtEndian>
#include <QByteArray>
#include <QList>
namespace Botan { class BigInt; }
namespace QSsh {
namespace Internal {
enum SshPacketType {
SSH_MSG_DISCONNECT = 1,
SSH_MSG_IGNORE = 2,
SSH_MSG_UNIMPLEMENTED = 3,
SSH_MSG_DEBUG = 4,
SSH_MSG_SERVICE_REQUEST = 5,
SSH_MSG_SERVICE_ACCEPT = 6,
SSH_MSG_KEXINIT = 20,
SSH_MSG_NEWKEYS = 21,
SSH_MSG_KEXDH_INIT = 30,
SSH_MSG_KEXDH_REPLY = 31,
SSH_MSG_USERAUTH_REQUEST = 50,
SSH_MSG_USERAUTH_FAILURE = 51,
SSH_MSG_USERAUTH_SUCCESS = 52,
SSH_MSG_USERAUTH_BANNER = 53,
SSH_MSG_USERAUTH_PK_OK = 60,
SSH_MSG_USERAUTH_PASSWD_CHANGEREQ = 60,
SSH_MSG_USERAUTH_INFO_REQUEST = 60,
SSH_MSG_USERAUTH_INFO_RESPONSE = 61,
SSH_MSG_GLOBAL_REQUEST = 80,
SSH_MSG_REQUEST_SUCCESS = 81,
SSH_MSG_REQUEST_FAILURE = 82,
// TODO: We currently take no precautions against sending these messages
// during a key re-exchange, which is not allowed.
SSH_MSG_CHANNEL_OPEN = 90,
SSH_MSG_CHANNEL_OPEN_CONFIRMATION = 91,
SSH_MSG_CHANNEL_OPEN_FAILURE = 92,
SSH_MSG_CHANNEL_WINDOW_ADJUST = 93,
SSH_MSG_CHANNEL_DATA = 94,
SSH_MSG_CHANNEL_EXTENDED_DATA = 95,
SSH_MSG_CHANNEL_EOF = 96,
SSH_MSG_CHANNEL_CLOSE = 97,
SSH_MSG_CHANNEL_REQUEST = 98,
SSH_MSG_CHANNEL_SUCCESS = 99,
SSH_MSG_CHANNEL_FAILURE = 100,
// Not completely safe, since the server may actually understand this
// message type as an extension. Switch to a different value in that case
// (between 128 and 191).
SSH_MSG_INVALID = 128
};
enum SshExtendedDataType { SSH_EXTENDED_DATA_STDERR = 1 };
class SshAbstractCryptoFacility;
class AbstractSshPacket
{
public:
virtual ~AbstractSshPacket();
void clear();
bool isComplete() const;
SshPacketType type() const;
static QByteArray encodeString(const QByteArray &string);
static QByteArray encodeMpInt(const Botan::BigInt &number);
template<typename T> static QByteArray encodeInt(T value)
{
const T valMsb = qToBigEndian(value);
return QByteArray(reinterpret_cast<const char *>(&valMsb), sizeof valMsb);
}
static void setLengthField(QByteArray &data);
void printRawBytes() const; // For Debugging.
const QByteArray &rawData() const { return m_data; }
QByteArray payLoad() const;
protected:
AbstractSshPacket();
virtual quint32 cipherBlockSize() const = 0;
virtual quint32 macLength() const = 0;
virtual void calculateLength() const;
quint32 length() const;
int paddingLength() const;
quint32 minPacketSize() const;
quint32 currentDataSize() const { return m_data.size(); }
QByteArray generateMac(const SshAbstractCryptoFacility &crypt,
quint32 seqNr) const;
static const quint32 PaddingLengthOffset;
static const quint32 PayloadOffset;
static const quint32 TypeOffset;
static const quint32 MinPaddingLength;
mutable QByteArray m_data;
mutable quint32 m_length;
};
} // namespace Internal
} // namespace QSsh
#endif // SSHPACKET_P_H
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