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/***************************************************************************
* fqterm, a terminal emulator for both BBS and *nix. *
* Copyright (C) 2008 fqterm development group. *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. *
***************************************************************************/
#ifndef FQTERM_SSH_KEX_H
#define FQTERM_SSH_KEX_H
#include <openssl/bn.h>
#include <QObject>
#include "fqterm_ssh_types.h"
#include "fqterm_ssh_packet.h"
#include "fqterm_ssh_const.h"
#include "ssh_pubkey_crypto.h"
namespace FQTerm {
class FQTermSSHPacketReceiver;
class FQTermSSHPacketSender;
class FQTermSSHKex: public QObject {
Q_OBJECT;
protected:
FQTermSSHPacketReceiver *packet_receiver_;
FQTermSSHPacketSender *packet_sender_;
char *V_C_;
char *V_S_;
public:
// Init with
// string V_C, the client's identification string (CR and LF
// excluded)
// string V_S, the server's identification string (CR and LF
// excluded)
FQTermSSHKex(const char *V_C, const char *V_S);
virtual ~FQTermSSHKex();
virtual void initKex(FQTermSSHPacketReceiver *packetReceiver,
FQTermSSHPacketSender *outputSender) = 0;
public slots:
virtual void handlePacket(int type) = 0;
signals:
void kexOK();
void reKex();
void kexError(QString);
void startEncryption(const u_char *sessionkey);
};
class FQTermSSH1Kex: public FQTermSSHKex {
Q_OBJECT;
private:
enum FQTermSSH1KexState {
BEFORE_PUBLICKEY, SESSIONKEY_SENT, KEYEX_OK
} kex_state_;
bool is_first_kex_;
struct ssh_pubkey_t *host_key_;
struct ssh_pubkey_t *server_key_;
u_char cookie_[8];
int server_flag_, ciphers_, auth_;
u_char session_id_[16];
u_char session_key_[32];
void makeSessionId();
void makeSessionKey();
public:
FQTermSSH1Kex(const char *V_C, const char *V_S);
~FQTermSSH1Kex();
virtual void initKex(FQTermSSHPacketReceiver *packetReceiver,
FQTermSSHPacketSender *outputSender);
virtual void handlePacket(int type);
};
} // namespace FQTerm
#endif //FQTERM_SSH_KEX_H
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