private async Task HandleLogonChallengeAsync()
{
var error = await _reader.ReadUInt8Async(); // always 3
var size = await _reader.ReadUInt16Async();
if (_client.Available < size)
{
await CloseAsync(AuthStatus.ProtocolError);
return;
}
var gameName = await _reader.ReadUInt32Async();
if (gameName != GameName)
{
await CloseAsync(AuthStatus.ProtocolError);
return;
}
var versionMajor = await _reader.ReadUInt8Async();
var versionMinor = await _reader.ReadUInt8Async();
var versionPatch = await _reader.ReadUInt8Async();
_buildNumber = await _reader.ReadUInt16Async();
var platform = (Architecture)await _reader.ReadUInt32Async();
var os = (OperatingSystem)await _reader.ReadUInt32Async();
var locale = (Locale)await _reader.ReadUInt32Async();
var timezoneBias = await _reader.ReadUInt32Async();
var ipAddress = new IPAddress(await _reader.ReadUInt32Async());
var realAddress = (_client.Client.RemoteEndPoint as IPEndPoint).Address;
var accountNameLength = await _reader.ReadUInt8Async();
var accountName = await _reader.ReadStringAsync(accountNameLength);
accountName = accountName.ToUpperInvariant();
_info = Program.authDatabase.Accounts.Single(a => a.username == accountName);
_info.last_ip = realAddress.ToString();
//_info.last_login = new DateTime().ToUniversalTime().ToString();
_info.os = os.ToString();
//_info.locale = (int)locale; <not the same>
byte[] passhash = MimicUtils.HexStringToByteArray(_info.pass_hash);
BigInteger s, v;
if (_info.s != "" && _info.v != "")
{
s = SrpHandler.BigIntFromHexString(_info.s);
v = SrpHandler.BigIntFromHexString(_info.v);
}
else
{
s = BigInteger.Zero;
v = BigInteger.Zero;
}
_authentication.ComputePrivateFields(accountName, passhash, s, v);
List <byte> data = new List <byte>();
data.Add((byte)_currentCommand);
data.Add(0);
data.Add((byte)AuthStatus.Success);
data.AddRange(_authentication.PublicKey); // B
data.Add((byte)_authentication.Generator.Length);
data.AddRange(_authentication.Generator); // g
data.Add((byte)_authentication.SafePrime.Length);
data.AddRange(_authentication.SafePrime); // N
data.AddRange(_authentication.Salt); // s
data.AddRange(Enumerable.Repeat((byte)0, 16));
data.Add(0); // security flags;
await _clientStream.WriteAsync(data.ToArray(), 0, data.Count);
}
public AuthHandler(ILogger <AuthHandler> logger)
{
_logger = logger;
_authentication = new SrpHandler();
}