56 lines
No EOL
1.9 KiB
C#
56 lines
No EOL
1.9 KiB
C#
using System.Text;
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using MassTransit.Mediator;
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using Microsoft.Extensions.Logging;
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using NetCoreServer;
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using Server.Packets;
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namespace Server;
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public class AuthSession : TcpSession
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{
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private readonly IMediator _mediator;
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private readonly ILogger<AuthSession> _logger;
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public AuthSession(TcpServer
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server, IMediator mediator, ILogger<AuthSession> logger) : base(server)
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{
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_mediator = mediator;
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_logger = logger;
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}
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protected override void OnReceived(byte[] buffer, long offset, long size)
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{
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Console.WriteLine($"Length: {size} & offset: {offset}");
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Span<byte> decryptedBuffer = new byte[size];
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// xor every value after the first 8 bytes
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var dataBuffer = Decrypt(new ArraySegment<byte>(buffer, 8, (int)size - 8).ToArray());
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Console.WriteLine("Length " + BitConverter.ToUInt16(buffer, 0));
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var opCode = BitConverter.ToUInt16(buffer.ToArray(), 2);
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Console.WriteLine("Packet Op Code: " + opCode);
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Console.WriteLine("Some Value: " + buffer[4]);
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var clientAliveTime = BitConverter.ToUInt16(buffer.ToArray(), 5);
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Console.WriteLine("Client Alive time: " + clientAliveTime);
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Console.WriteLine("Might be a flag:" + buffer[7]);
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Console.WriteLine("Full buffer: " + Encoding.ASCII.GetString(dataBuffer.ToArray()));
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RawPacket rawPacket = new RawPacket((OperationCode)opCode, dataBuffer, clientAliveTime, buffer[0],
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buffer[3],
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Id, this);
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Parallel.Invoke(() => _mediator.Send(rawPacket));
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_logger.LogInformation("Connection from: {@RemoteEndpoint}", Socket.RemoteEndPoint?.ToString());
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base.OnReceived(decryptedBuffer.ToArray(), offset, decryptedBuffer.Length);
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}
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private byte[] Decrypt(byte[] buffer)
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{
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for (int i = 0; i < buffer.Length; ++i)
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{
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buffer[i] = (byte)(buffer[i] ^ i ^ (3 * (0xFE - i)));
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}
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return buffer;
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}
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} |