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75 lines
2.9 KiB
75 lines
2.9 KiB
15 years ago
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/***************************************************************************
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* Copyright (C) 2005 by Joris Guisson *
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* joris.guisson@gmail.com *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the *
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* Free Software Foundation, Inc., *
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
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***************************************************************************/
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#include <util/log.h>
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#include <torrent/globals.h>
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#include <util/sha1hash.h>
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#include "functions.h"
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#include "bigint.h"
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using namespace bt;
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namespace mse
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{
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/*
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static const BigInt P = BigInt(
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"0xFFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD"
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"129024E088A67CC74020BBEA63B139B22514A08798E3404"
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"DDEF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C"
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"245E485B576625E7EC6F44C42E9A63A36210000000000090563");
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*/
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static const BigInt P = BigInt("0xFFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD129024E088A67CC74020BBEA63B139B22514A08798E3404DDEF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245E485B576625E7EC6F44C42E9A63A36210000000000090563");
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void GeneratePublicPrivateKey(BigInt & priv,BigInt & pub)
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{
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BigInt G = BigInt("0x02");
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priv = BigInt::random();
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pub = BigInt::powerMod(G,priv,P);
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}
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BigInt DHSecret(const BigInt & our_priv,const BigInt & peer_pub)
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{
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return BigInt::powerMod(peer_pub,our_priv,P);
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}
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bt::SHA1Hash EncryptionKey(bool a,const BigInt & s,const bt::SHA1Hash & skey)
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{
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Uint8 buf[120];
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memcpy(buf,"key",3);
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buf[3] = (Uint8)(a ? 'A' : 'B');
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s.toBuffer(buf + 4,96);
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memcpy(buf + 100,skey.getData(),20);
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return bt::SHA1Hash::generate(buf,120);
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}
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void DumpBigInt(const QString & name,const BigInt & bi)
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{
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static Uint8 buf[512];
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Uint32 nb = bi.toBuffer(buf,512);
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bt::Log & lg = Out();
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lg << name << " (" << nb << ") = ";
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for (Uint32 i = 0;i < nb;i++)
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{
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lg << QString("0x%1 ").arg(buf[i],0,16);
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}
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lg << endl;
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}
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}
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