/// <summary>
/// Sends a <see cref="PacketComposer"/> to Wolfteam.
/// </summary>
/// <param name="packet">The packet you want to send.</param>
private async Task SendPacketAsync(PacketComposer packet)
{
if (!Connected)
{
throw new Exception("Session is not connected to Wolfteam.");
}
if (!Listening)
{
Logger.Warn("You are sending a packet without listening for a response.");
}
var buffer = await packet.ToArrayAsync();
await _client.GetStream().WriteAsync(buffer, 0, buffer.Length);
}
/// <summary>
/// Constructs and sends the <see cref="PacketOut.Login"/> packet to Wolfteam.
/// </summary>
/// <returns></returns>
public async Task LoginAsync()
{
using (var packet = new PacketComposer(PacketOut.Login))
{
// Add username (16 bytes).
packet.Writer.Write(Encoding.ASCII.GetBytes(_account.Username)); // Username.
packet.Writer.Write(new byte[16 - _account.Username.Length]); // Username padding (to 16 bytes).
// Add unknown (16 bytes).
packet.Writer.Write(_account.AuthRandom); // Auth uk (4 bytes).
packet.Writer.Write(HexUtil.HexToBytes("60F41900")); // Unknown (4 bytes).
packet.Writer.Write(HexUtil.HexToBytes("41F3DADA")); // Unknown (4 bytes) (Changes in between requests through real client).
packet.Writer.Write(HexUtil.HexToBytes("60F41900")); // Unknown (4 bytes).
// Add second payload (32 bytes)
using (var subPacketStream = new MemoryStream(32))
using (var subPacket = new BinaryWriter(subPacketStream))
{
subPacket.Write(Encoding.ASCII.GetBytes(_account.Password)); // Password.
subPacket.Write(new byte[20 - _account.Password.Length]); // Password padding (to 20 bytes).
subPacket.Write(WolfteamConfig.ClientVersion); // Client version (4 bytes).
// Add checksums.
const int subPacketId = 4114;
var subPacketBuffer = subPacketStream.ToArray();
if (subPacketBuffer.Length % 12 != 0)
{
throw new Exception("Buffer length must be a multiple of 12.");
}
// Write checksums.
subPacket.Seek(0, SeekOrigin.Begin);
for (var index = 0; index < subPacketBuffer.Length / 12; index++)
{
subPacket.Write(WolfteamConfig.MagicChecksum + subPacketId);
subPacket.Write(subPacketBuffer, index * 12, 12);
}
// Append to main packet.
packet.AppendPayload(await _crypto.EncryptAsync(subPacketStream.ToArray()));
}
await SendPacketAsync(packet);
}
}
