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/***************************************************************************
* Copyright (C) 2005 by Joris Guisson *
* joris.guisson@gmail.com *
* *
* 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 Street, Fifth Floor, Boston, MA 02110-1301, USA. *
***************************************************************************/
#ifndef MSEENCRYPTEDAUTHENTICATE_H
#define MSEENCRYPTEDAUTHENTICATE_H
#include <util/sha1hash.h>
#include <torrent/authenticate.h>
#include "bigint.h"
namespace mse
{
class RC4Encryptor;
const Uint32 MAX_EA_BUF_SIZE = 622 + 512;
/**
* @author Joris Guisson <joris.guisson@gmail.com>
*
* Encrypted version of the Authenticate class
*/
class EncryptedAuthenticate : public bt::Authenticate
{
Q_OBJECT
public:
EncryptedAuthenticate(const QString& ip, Uint16 port, const bt::SHA1Hash& info_hash, const bt::PeerID& peer_id, bt::PeerManager* pman);
virtual ~EncryptedAuthenticate();
private slots:
virtual void connected();
virtual void onReadyRead();
private:
void handleYB();
void handleCryptoSelect();
void findVC();
void handlePadD();
private:
enum State
{
NOT_CONNECTED,
SENT_YA,
GOT_YB,
FOUND_VC,
WAIT_FOR_PAD_D,
NORMAL_HANDSHAKE
};
BigInt xa,ya,s,skey,yb;
State state;
RC4Encryptor* our_rc4;
Uint8 buf[MAX_EA_BUF_SIZE];
Uint32 buf_size;
Uint32 vc_off;
Uint32 dec_bytes;
bt::SHA1Hash enc,dec;
Uint32 crypto_select;
Uint16 pad_D_len;
Uint32 end_of_crypto_handshake;
};
}
#endif
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