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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** 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 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 General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** 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-3.0.html.
**
****************************************************************************/
#pragma once
#include "sshconnection.h"
#include <QByteArray>
#include <QScopedPointer>
namespace Botan {
class DH_PrivateKey;
class ECDH_PrivateKey;
class HashFunction;
}
namespace QSsh {
namespace Internal {
struct SshKeyExchangeInit;
class SshSendFacility;
class SshIncomingPacket;
class SshKeyExchange
{
public:
SshKeyExchange(const SshConnectionParameters &connParams, SshSendFacility &sendFacility);
~SshKeyExchange();
void sendKexInitPacket(const QByteArray &serverId);
// Returns true <=> the server sends a guessed package.
bool sendDhInitPacket(const SshIncomingPacket &serverKexInit);
void sendNewKeysPacket(const SshIncomingPacket &dhReply,
const QByteArray &clientId);
QByteArray k() const { return m_k; }
QByteArray h() const { return m_h; }
Botan::HashFunction *hash() const { return m_hash.data(); }
QByteArray encryptionAlgo() const { return m_encryptionAlgo; }
QByteArray decryptionAlgo() const { return m_decryptionAlgo; }
QByteArray hMacAlgoClientToServer() const { return m_c2sHMacAlgo; }
QByteArray hMacAlgoServerToClient() const { return m_s2cHMacAlgo; }
private:
QByteArray hashAlgoForKexAlgo() const;
void determineHashingAlgorithm(const SshKeyExchangeInit &kexInit, bool serverToClient);
void checkHostKey(const QByteArray &hostKey);
Q_NORETURN void throwHostKeyException();
QByteArray m_serverId;
QByteArray m_clientKexInitPayload;
QByteArray m_serverKexInitPayload;
QScopedPointer<Botan::DH_PrivateKey> m_dhKey;
QScopedPointer<Botan::ECDH_PrivateKey> m_ecdhKey;
QByteArray m_kexAlgoName;
QByteArray m_k;
QByteArray m_h;
QByteArray m_serverHostKeyAlgo;
QByteArray m_encryptionAlgo;
QByteArray m_decryptionAlgo;
QByteArray m_c2sHMacAlgo;
QByteArray m_s2cHMacAlgo;
QScopedPointer<Botan::HashFunction> m_hash;
const SshConnectionParameters m_connParams;
SshSendFacility &m_sendFacility;
};
} // namespace Internal
} // namespace QSsh
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