/// <summary>
/// Occurs when the client has been sucessfully authenticated by the loginserver.
/// Called by UILoginDialog.cs.
/// </summary>
/// <param name="Client">The client that received the packet.</param>
/// <param name="Packet">The packet that was received.</param>
public static void OnLoginNotify(NetworkClient Client, ProcessedPacket Packet)
{
//Should this be stored for permanent access?
byte[] ServerPublicKey = Packet.ReadBytes(Packet.ReadByte());
byte[] EncryptedData = Packet.ReadBytes(Packet.ReadByte());
AESEncryptor Enc = (AESEncryptor)Client.ClientEncryptor;
Enc.PublicKey = ServerPublicKey;
Client.ClientEncryptor = Enc;
lock (NetworkFacade.Client)
NetworkFacade.Client.ClientEncryptor = Enc;
ECDiffieHellmanCng PrivateKey = Client.ClientEncryptor.GetDecryptionArgsContainer().AESDecryptArgs.PrivateKey;
byte[] NOnce = Client.ClientEncryptor.GetDecryptionArgsContainer().AESDecryptArgs.NOnce;
byte[] ChallengeResponse = StaticStaticDiffieHellman.Decrypt(PrivateKey,
ECDiffieHellmanCngPublicKey.FromByteArray(ServerPublicKey, CngKeyBlobFormat.EccPublicBlob),
NOnce, EncryptedData);
MemoryStream StreamToEncrypt = new MemoryStream();
BinaryWriter Writer = new BinaryWriter(StreamToEncrypt);
Writer.Write((byte)ChallengeResponse.Length);
Writer.Write(ChallengeResponse, 0, ChallengeResponse.Length);
Writer.Write(Client.ClientEncryptor.Username);
Writer.Write((byte)PlayerAccount.Hash.Length);
Writer.Write(PlayerAccount.Hash);
Writer.Flush();
//Encrypt data using key and IV from server, hoping that it'll be decrypted correctly at the other end...
Client.SendEncrypted((byte)PacketType.CHALLENGE_RESPONSE, StreamToEncrypt.ToArray());
}
public static void InitialClientConnect(NetworkClient Client, ProcessedPacket P)
{
Logger.LogInfo("Received InitialClientConnect!");
PacketStream EncryptedPacket = new PacketStream((byte)PacketType.LOGIN_NOTIFY_CITY, 0);
EncryptedPacket.WriteHeader();
AESEncryptor Enc = (AESEncryptor)Client.ClientEncryptor;
Enc.PublicKey = P.ReadBytes((P.ReadByte()));
Enc.NOnce = P.ReadBytes((P.ReadByte()));
Enc.PrivateKey = NetworkFacade.ServerPrivateKey;
Client.ClientEncryptor = Enc;
MemoryStream StreamToEncrypt = new MemoryStream();
BinaryWriter Writer = new BinaryWriter(StreamToEncrypt);
Writer.Write(Enc.Challenge, 0, Enc.Challenge.Length);
Writer.Flush();
byte[] EncryptedData = StaticStaticDiffieHellman.Encrypt(NetworkFacade.ServerPrivateKey,
System.Security.Cryptography.ECDiffieHellmanCngPublicKey.FromByteArray(Enc.PublicKey,
System.Security.Cryptography.CngKeyBlobFormat.EccPublicBlob), Enc.NOnce, StreamToEncrypt.ToArray());
EncryptedPacket.WriteUInt16((ushort)(PacketHeaders.UNENCRYPTED +
(1 + NetworkFacade.ServerPublicKey.Length) +
(1 + EncryptedData.Length)));
EncryptedPacket.WriteByte((byte)NetworkFacade.ServerPublicKey.Length);
EncryptedPacket.WriteBytes(NetworkFacade.ServerPublicKey);
EncryptedPacket.WriteByte((byte)EncryptedData.Length);
EncryptedPacket.WriteBytes(EncryptedData);
Client.Send(EncryptedPacket.ToArray());
}
/// <summary>
/// Client wanted to log in!
/// </summary>
public static void HandleLoginRequest(NetworkClient Client, ProcessedPacket P)
{
try
{
Logger.LogInfo("Received LoginRequest!\r\n");
byte Version1 = (byte)P.ReadByte();
byte Version2 = (byte)P.ReadByte();
byte Version3 = (byte)P.ReadByte();
byte Version4 = (byte)P.ReadByte();
string ClientVersion = Version1.ToString() + "." + Version2.ToString() + "." + Version3.ToString() +
"." + Version4.ToString();
if (ClientVersion != GlobalSettings.Default.ClientVersion)
{
PacketStream OutPacket = new PacketStream((byte)PacketType.INVALID_VERSION, 2);
OutPacket.WriteHeader();
OutPacket.WriteByte(0x01);
Client.Send(OutPacket.ToArray());
Logger.LogInfo("Bad version - sent SInvalidVersion!\r\n");
Client.Disconnect();
return;
}
PacketStream EncryptedPacket = new PacketStream((byte)PacketType.LOGIN_NOTIFY, 0);
EncryptedPacket.WriteHeader();
AESEncryptor Enc = (AESEncryptor)Client.ClientEncryptor;
if (Enc == null)
{
Enc = new AESEncryptor("");
}
Enc.PublicKey = P.ReadBytes((P.ReadByte()));
Enc.NOnce = P.ReadBytes((P.ReadByte()));
Enc.PrivateKey = NetworkFacade.ServerKey;
Client.ClientEncryptor = Enc;
MemoryStream StreamToEncrypt = new MemoryStream();
BinaryWriter Writer = new BinaryWriter(StreamToEncrypt);
Writer.Write(Enc.Challenge, 0, Enc.Challenge.Length);
Writer.Flush();
byte[] EncryptedData = StaticStaticDiffieHellman.Encrypt(NetworkFacade.ServerKey,
System.Security.Cryptography.ECDiffieHellmanCngPublicKey.FromByteArray(Enc.PublicKey,
System.Security.Cryptography.CngKeyBlobFormat.EccPublicBlob), Enc.NOnce, StreamToEncrypt.ToArray());
EncryptedPacket.WriteUInt16((ushort)(PacketHeaders.UNENCRYPTED +
(1 + NetworkFacade.ServerPublicKey.Length) +
(1 + EncryptedData.Length)));
EncryptedPacket.WriteByte((byte)NetworkFacade.ServerPublicKey.Length);
EncryptedPacket.WriteBytes(NetworkFacade.ServerPublicKey);
EncryptedPacket.WriteByte((byte)EncryptedData.Length);
EncryptedPacket.WriteBytes(EncryptedData);
Client.Send(EncryptedPacket.ToArray());
}
//This should HOPEFULLY wade off clients sending unreadable (I.E old protocol) packets...
catch (Exception E)
{
Logger.LogDebug("Error while handling login request, disconnecting client: " +
E.ToString());
Client.Disconnect();
return;
}
}
