1 files changed, 74 insertions, 0 deletions
diff --git a/libktorrent/mse/functions.cpp b/libktorrent/mse/functions.cpp
new file mode 100644
index 0000000..bb19b93
--- /dev/null
+++ b/libktorrent/mse/functions.cpp
@@ -0,0 +1,74 @@
+/***************************************************************************
+ *   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;
+	}
+
+}