static void Main(string[] args)
{
TcpListener tcpl = null;
TcpClient tcpc = null;
NetworkStream stream = null;
TripleDESCryptoServiceProvider crypt3des = null;
SymmetricsSI symmetrics = null;
RSACryptoServiceProvider rsaClient = null;
RSACryptoServiceProvider rsaServer = null;
try
{
Console.WriteLine("SERVER\n");
tcpl = new TcpListener(IPAddress.Any, 9999);
tcpl.Start();
tcpc = tcpl.AcceptTcpClient();
stream = tcpc.GetStream();
ProtocolSI protocol = new ProtocolSI();
ProtocolSICmdType command;
byte[] packet = protocol.Make(ProtocolSICmdType.ACK);
crypt3des = new TripleDESCryptoServiceProvider();
symmetrics = new SymmetricsSI(crypt3des);
rsaClient = new RSACryptoServiceProvider();
rsaServer = new RSACryptoServiceProvider();
string privateAndPublicKeyFilename = "serverpvpbkey.txt";
if (File.Exists(privateAndPublicKeyFilename)) rsaServer.FromXmlString(File.ReadAllText(privateAndPublicKeyFilename));
else File.WriteAllText(privateAndPublicKeyFilename, rsaServer.ToXmlString(true));
Console.WriteLine("waiting for client public key");
stream.Read(protocol.Buffer, 0, protocol.Buffer.Length);
rsaClient.FromXmlString(protocol.GetStringFromData());
Console.WriteLine("ok");
Console.WriteLine("CLIENT PUBLIC KEY: " + rsaServer.ToXmlString(false));
Console.WriteLine("sending for server public key");
packet = protocol.Make(ProtocolSICmdType.PUBLIC_KEY, rsaServer.ToXmlString(false));
stream.Write(packet, 0, packet.Length);
stream.Read(protocol.Buffer, 0, protocol.Buffer.Length);
Console.WriteLine("ok");
Console.WriteLine("sending for 3des key");
packet = protocol.Make(ProtocolSICmdType.SECRET_KEY, rsaServer.Encrypt(crypt3des.Key, false));
stream.Write(packet, 0, packet.Length);
stream.Read(protocol.Buffer, 0, protocol.Buffer.Length);
Console.WriteLine("ok");
Console.WriteLine("sending for 3des iv");
packet = protocol.Make(ProtocolSICmdType.IV, rsaServer.Encrypt(crypt3des.IV, false));
stream.Write(packet, 0, packet.Length);
stream.Read(protocol.Buffer, 0, protocol.Buffer.Length);
Console.WriteLine("ok");
Console.WriteLine("sending for 3des padding");
packet = protocol.Make(ProtocolSICmdType.IV, rsaServer.Encrypt(BitConverter.GetBytes((int)crypt3des.Padding), false));
stream.Write(packet, 0, packet.Length);
stream.Read(protocol.Buffer, 0, protocol.Buffer.Length);
Console.WriteLine("ok");
Console.WriteLine("sending for 3des mode");
packet = protocol.Make(ProtocolSICmdType.MODE, rsaServer.Encrypt(BitConverter.GetBytes((int)crypt3des.Mode), false));
stream.Write(packet, 0, packet.Length);
stream.Read(protocol.Buffer, 0, protocol.Buffer.Length);
Console.WriteLine("ok");
}
catch (Exception e)
{
Console.WriteLine(e.Message);
throw;
}
finally
{
Console.WriteLine("disconnected");
if (stream != null) stream.Dispose();
if (tcpc != null) tcpc.Close();
if (tcpl != null) tcpl.Stop();
}
}
static void Main(string[] args)
{
Console.WriteLine("CLIENT\n");
TcpClient tcpc = null;
NetworkStream stream = null;
TripleDESCryptoServiceProvider crypt3des = null;
SymmetricsSI symmetrics = null;
RSACryptoServiceProvider rsaClient = null;
RSACryptoServiceProvider rsaServer = null;
try
{
tcpc = new TcpClient();
tcpc.Connect("", 9999);
stream = tcpc.GetStream();
ProtocolSI protocol = new ProtocolSI();
byte[] packet;
crypt3des = new TripleDESCryptoServiceProvider();
symmetrics = new SymmetricsSI(crypt3des);
rsaClient = new RSACryptoServiceProvider();
string privateAndPublicKeyFilename = "clientpvpbkey.txt";
rsaServer = new RSACryptoServiceProvider();
if (File.Exists(privateAndPublicKeyFilename)) rsaClient.FromXmlString(File.ReadAllText(privateAndPublicKeyFilename));
else File.WriteAllText(privateAndPublicKeyFilename, rsaClient.ToXmlString(true));
var ack = protocol.Make(ProtocolSICmdType.ACK);
// Send key
Console.WriteLine("sending for client public key");
packet = protocol.Make(ProtocolSICmdType.PUBLIC_KEY, rsaClient.ToXmlString(false));
stream.Write(packet, 0, packet.Length);
Console.WriteLine("ok");
Console.WriteLine("waiting for server public key");
stream.Read(protocol.Buffer, 0, protocol.Buffer.Length);
stream.Write(ack, 0, ack.Length);
rsaServer.FromXmlString(protocol.GetStringFromData());
Console.WriteLine("ok");
Console.WriteLine("SERVER PUBLIC KEY: " + rsaServer.ToXmlString(false));
Console.WriteLine("waiting for 3des key");
stream.Read(protocol.Buffer, 0, protocol.Buffer.Length);
stream.Write(ack, 0, ack.Length);
crypt3des.Key = rsaServer.Decrypt(protocol.GetData(), false);
Console.WriteLine("ok");
Console.WriteLine("3DES KEY: " + crypt3des.Key.ToString());
Console.WriteLine("waiting for 3des iv");
stream.Read(protocol.Buffer, 0, protocol.Buffer.Length);
stream.Write(ack, 0, ack.Length);
crypt3des.IV = rsaServer.Decrypt(protocol.GetData(), false);
Console.WriteLine("ok");
Console.WriteLine("3DES IV: " + crypt3des.IV.ToString());
Console.WriteLine("waiting for 3des padding");
stream.Read(protocol.Buffer, 0, protocol.Buffer.Length);
stream.Write(ack, 0, ack.Length);
crypt3des.Padding = (PaddingMode)BitConverter.ToInt32(rsaServer.Decrypt(protocol.GetData(), false), 0);
Console.WriteLine("ok");
Console.WriteLine("3DES PADDING: " + crypt3des.Padding.ToString());
Console.WriteLine("waiting for 3des mode");
stream.Read(protocol.Buffer, 0, protocol.Buffer.Length);
stream.Write(ack, 0, ack.Length);
crypt3des.Mode = (CipherMode)BitConverter.ToInt32(rsaServer.Decrypt(protocol.GetData(), false), 0);
Console.WriteLine("ok");
Console.WriteLine("3DES MODE: " + crypt3des.Mode.ToString());
}
catch (Exception e)
{
Console.WriteLine(e.Message);
throw;
}
finally
{
Console.WriteLine("disconnected");
if (stream != null) stream.Dispose();
if (tcpc != null) tcpc.Close();
if (crypt3des != null) crypt3des.Dispose();
if (symmetrics != null) crypt3des.Dispose();
if (rsaClient != null) rsaClient.Dispose();
if (rsaServer != null) rsaServer.Dispose();
}
}
static void Main(string[] args)
{
TcpClient tcpc = null;
NetworkStream stream = null;
TripleDESCryptoServiceProvider crypto = null;
SymmetricsSI symmetrics = null;
try
{
Console.Write("A ligar ao servidor... ");
tcpc = new TcpClient();
tcpc.Connect("", 9999);
Console.WriteLine("ok");
stream = tcpc.GetStream();
ProtocolSI protocol = new ProtocolSI();
byte[] packet;
crypto = new TripleDESCryptoServiceProvider();
symmetrics = new SymmetricsSI(crypto);
// Send key
packet = protocol.Make(ProtocolSICmdType.PADDING, (int)crypto.Padding);
stream.Write(packet, 0, packet.Length);
stream.Read(protocol.Buffer, 0, protocol.Buffer.Length);
packet = protocol.Make(ProtocolSICmdType.IV, crypto.IV);
stream.Write(packet, 0, packet.Length);
stream.Read(protocol.Buffer, 0, protocol.Buffer.Length);
packet = protocol.Make(ProtocolSICmdType.MODE, (int)crypto.Mode);
stream.Write(packet, 0, packet.Length);
stream.Read(protocol.Buffer, 0, protocol.Buffer.Length);
packet = protocol.Make(ProtocolSICmdType.SECRET_KEY, crypto.Key);
stream.Write(packet, 0, packet.Length);
stream.Read(protocol.Buffer, 0, protocol.Buffer.Length);
packet = protocol.Make(ProtocolSICmdType.EOF);
stream.Write(packet, 0, packet.Length);
stream.Read(protocol.Buffer, 0, protocol.Buffer.Length);
var message = symmetrics.Encrypt(Encoding.UTF8.GetBytes("HelloWorld"));
packet = protocol.Make(ProtocolSICmdType.SYM_CIPHER_DATA, message);
stream.Write(packet, 0, packet.Length);
stream.Read(protocol.Buffer, 0, protocol.Buffer.Length);
if (protocol.GetCmdType() != ProtocolSICmdType.ACK)
throw new Exception("Server could not decrypt");
}
catch (Exception e)
{
Console.WriteLine(e.Message);
throw;
}
finally
{
Console.WriteLine("disconnected");
if (stream != null) stream.Dispose();
if (tcpc != null) tcpc.Close();
if (crypto != null) crypto.Dispose();
if (symmetrics != null) crypto.Dispose();
}
}
