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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. *
***************************************************************************/
#include <util/log.h>
#include <torrent/globals.h>
#include <util/sha1hash.h>
#include "functions.h"
#include "bigint.h"
using namespace bt;
namespace mse
{
/*
static const BigInt P = BigInt(
"0xFFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD"
"129024E088A67CC74020BBEA63B139B22514A08798E3404"
"DDEF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C"
"245E485B576625E7EC6F44C42E9A63A36210000000000090563");
*/
static const BigInt P = BigInt("0xFFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD129024E088A67CC74020BBEA63B139B22514A08798E3404DDEF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245E485B576625E7EC6F44C42E9A63A36210000000000090563");
void GeneratePublicPrivateKey(BigInt & priv,BigInt & pub)
{
BigInt G = BigInt("0x02");
priv = BigInt::random();
pub = BigInt::powerMod(G,priv,P);
}
BigInt DHSecret(const BigInt & our_priv,const BigInt & peer_pub)
{
return BigInt::powerMod(peer_pub,our_priv,P);
}
bt::SHA1Hash EncryptionKey(bool a,const BigInt & s,const bt::SHA1Hash & skey)
{
Uint8 buf[120];
memcpy(buf,"key",3);
buf[3] = (Uint8)(a ? 'A' : 'B');
s.toBuffer(buf + 4,96);
memcpy(buf + 100,skey.getData(),20);
return bt::SHA1Hash::generate(buf,120);
}
void DumpBigInt(const QString & name,const BigInt & bi)
{
static Uint8 buf[512];
Uint32 nb = bi.toBuffer(buf,512);
bt::Log & lg = Out();
lg << name << " (" << nb << ") = ";
for (Uint32 i = 0;i < nb;i++)
{
lg << QString("0x%1 ").arg(buf[i],0,16);
}
lg << endl;
}
}
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