private void Receive(IAsyncResult ar)
{
if (IsClientConnected())
{
int bytesReceived = tcpClient.Client.EndReceive(ar);
if (bytesReceived != 0)
{
Interlocked.Increment(ref transferred);
Interlocked.Increment(ref received);
AuthenticationCrypto.Decrypt(Buffer, 0, 1);
if ((Buffer[0] & 0x80) != 0)
{
byte temp = Buffer[0];
Buffer = new byte[5];
Buffer[0] = (byte)((0x7f & temp));
remaining = 4;
}
else
{
remaining = 3;
}
index = 1;
tcpClient.Client.BeginReceive(Buffer, index, remaining, SocketFlags.None, new AsyncCallback(ReceiveHeader), null);
}
}
}
private void ReceiveHeader(IAsyncResult ar)
{
if (IsClientConnected())
{
int bytesReceived = tcpClient.Client.EndReceive(ar);
if (bytesReceived != 0)
{
Interlocked.Add(ref transferred, bytesReceived);
Interlocked.Add(ref received, bytesReceived);
if (bytesReceived == remaining)
{
AuthenticationCrypto.Decrypt(Buffer, 1, Buffer.Length - 1);
ServerHeader header = new ServerHeader(Buffer);
if (header.Opcode == Opcodes.SMSG_GM_MESSAGECHAT || header.Opcode == Opcodes.SMSG_MESSAGECHAT)
{
Debug.WriteLine(header.Opcode);
}
if (header.Size > 0)
{
index = 0;
remaining = header.Size;
Buffer = new byte[header.Size];
tcpClient.Client.BeginReceive(Buffer, index, remaining, SocketFlags.None, new AsyncCallback(ReceivePayload), header);
}
else
{
HandleIncoming(new PacketReader(header));
Start();
}
}
else
{
index += bytesReceived;
remaining -= bytesReceived;
tcpClient.Client.BeginReceive(Buffer, index, remaining, SocketFlags.None, new AsyncCallback(ReceiveHeader), null);
}
}
}
}
void HandleServerAuthChallenge(PacketReader reader)
{
uint one = reader.ReadUInt32();
uint seed = reader.ReadUInt32();
BigInteger seed1 = reader.ReadBytes(16).ToBigInteger();
BigInteger seed2 = reader.ReadBytes(16).ToBigInteger();
var rand = System.Security.Cryptography.RandomNumberGenerator.Create();
byte[] bytes = new byte[4];
rand.GetBytes(bytes);
BigInteger _seed = bytes.ToBigInteger();
uint zero = 0;
byte[] response = HashAlgorithm.SHA1.Hash(Encoding.ASCII.GetBytes(Manager.m_WorldServer.username.ToUpper()),
BitConverter.GetBytes(zero),
BitConverter.GetBytes((uint)_seed),
BitConverter.GetBytes(seed),
Manager.m_WorldServer.SessionKey.ToCleanByteArray());
PacketWriter writer = new PacketWriter(Opcodes.ClientAuthSession);
writer.Write((uint)12340);
writer.Write(zero);
writer.Write(Manager.m_WorldServer.username.ToUpper().ToCString());
writer.Write(zero);
writer.Write((uint)_seed);
writer.Write(zero);
writer.Write(zero);
writer.Write(zero);
writer.Write((ulong)zero);
writer.Write(response);
writer.Write(zero);
Send(writer);
AuthenticationCrypto.Initialize(Manager.m_WorldServer.SessionKey.ToCleanByteArray());
}