public static void HandleAuthLogonChallenge(IClient client, IncomingAuthPacket packet)
{
Contract.Requires(client != null);
Contract.Requires(packet != null);
var unk = packet.ReadByte();
var size = packet.ReadInt16();
// we can't read it in directly as a string or char array as in C# chars are 16 bits
var gameName = packet.ReadFourCC();
var version1 = packet.ReadByte();
var version2 = packet.ReadByte();
var version3 = packet.ReadByte();
var build = packet.ReadInt16();
var platform = packet.ReadFourCC();
var os = packet.ReadFourCC();
var country = packet.ReadFourCC();
var timezoneBias = packet.ReadInt32();
var ip = packet.ReadInt32();
var usernameLength = packet.ReadByte();
var usernameBytes = packet.ReadBytes(usernameLength);
var username = Encoding.ASCII.GetString(usernameBytes);
SRPServer srpData = GetSRPDataForUsername(username);
if (srpData == null)
{
SendAuthenticationChallengeFailure(client, AuthResult.FailUnknownAccount);
}
else
{
client.UserData.SRP = srpData;
// make sure the result is at least 32 bytes long
var peData = srpData.PublicEphemeralValueB.GetBytes(32);
var publicEphemeral = new BigInteger(peData);
var rand = new BigInteger(new FastRandom(), 16 * 8);
SendAuthenticationChallengeSuccess(client,
publicEphemeral,
srpData.Parameters.Generator,
srpData.Parameters.Modulus,
srpData.Salt,
rand);
}
}
public static void HandleReconnectChallenge(IClient client, IncomingAuthPacket packet)
{
// structure is the same as AuthenticationLogonChallenge
Contract.Requires(client != null);
Contract.Requires(packet != null);
var unk = packet.ReadByte();
var size = packet.ReadInt16();
var gameName = packet.ReadFourCC();
var version1 = packet.ReadByte();
var version2 = packet.ReadByte();
var version3 = packet.ReadByte();
var build = packet.ReadInt16();
var platform = packet.ReadFourCC();
var os = packet.ReadFourCC();
var country = packet.ReadFourCC();
var timezoneBias = packet.ReadInt32();
var ip = packet.ReadInt32();
var usernameLength = packet.ReadByte();
var usernameBytes = packet.ReadBytes(usernameLength);
var username = Encoding.ASCII.GetString(usernameBytes);
// TODO fetch this from the database (or some other persistent storage)
BigInteger sessionKey = null;
if (sessionKey == null) {
client.Disconnect();
return;
}
BigInteger rand = new BigInteger(new FastRandom(), 16 * 8);
SendReconnectChallengeSuccess(client, rand);
client.UserData.ReconnectRand = rand;
client.UserData.Username = username;
}
