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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_PACKET_H
#define FQTERM_SSH_PACKET_H
#include <openssl/bn.h>
#include <QObject>
#include "fqterm_ssh_types.h"
#include "fqterm_ssh_buffer.h"
#include "ssh_mac.h"
#include "fqterm_serialization.h"
#include "ssh_cipher.h"
namespace FQTerm {
class FQTermSSHPacketSender: public QObject {
Q_OBJECT;
public:
FQTermSSHBuffer *output_buffer_;
FQTermSSHBuffer *buffer_;
ssh_cipher_t *cipher;
ssh_mac_t *mac;
FQTermSSHPacketSender();
virtual ~FQTermSSHPacketSender();
void startPacket(int pkt_type);
void putByte(int data);
void putInt(u_int data);
void putString(const char *string, int len = -1);
void putRawData(const char *data, int length);
void putBN(BIGNUM *bignum);
void write();
virtual int getIVSize() const { return cipher->IVSize;}
virtual int getKeySize() const { return cipher->keySize;}
int getMacKeySize() const { return mac->keySize;}
public slots:
void startEncryption(const u_char *key, const u_char *IV = NULL);
void resetEncryption();
void startMac(const u_char *sessionkey);
void resetMac();
void enableCompress(int enable) {is_compressed_ = enable;};
signals:
void dataToWrite();
protected:
bool is_encrypt_;
int cipher_type_;
bool is_mac_;
bool is_compressed_;
u_int32_t sequence_no_;
virtual void makePacket() = 0;
};
class FQTermSSHPacketReceiver: public QObject {
Q_OBJECT;
public:
FQTermSSHBuffer *buffer_;
ssh_cipher_t *cipher;
ssh_mac_t *mac;
FQTermSSHPacketReceiver();
virtual ~FQTermSSHPacketReceiver();
int packetType()const {
return packet_type_;
}
u_char getByte();
u_int getInt();
void *getString(int *length = NULL);
void getRawData(char *data, int length);
void getBN(BIGNUM *bignum);
void consume(int len);
virtual int packetDataLen() const { return real_data_len_;}
virtual int getIVSize() const { return cipher->IVSize;}
virtual int getKeySize() const { return cipher->keySize;}
int getMacKeySize() const { return mac->keySize;}
virtual void parseData(FQTermSSHBuffer *input) = 0;
public slots:
void startEncryption(const u_char *key, const u_char *IV = NULL);
void resetEncryption();
void startMac(const u_char *sessionkey);
void resetMac();
void enableCompress(int enable) {is_compressed_ = enable;};
signals:
void packetAvaliable(int type);
void packetError(QString);
protected:
bool is_decrypt_;
int cipher_type_;
bool is_mac_;
bool is_compressed_;
int packet_type_;
int real_data_len_;
u_int32_t sequence_no_;
};
} // namespace FQTerm
#endif // FQTERM_SSH_PACKET
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