public static byte[] CalculateInitialVector(uint initialValue)
{
var thash = new TigerHash();
var hash = thash.ComputeHash(BitConverter.GetBytes(initialValue));
thash.Clear();
return(hash);
}
private static void DoIW5ServerAuth(object stateo)
{
var state = (ServerAuthstate)stateo;
// obtain key auth
try
{
var query = Query.EQ("keyHash", (long)state.KeyData);
var result = Database.AServerKeys.Find(query);
if (result.Count() > 0)
{
var keyEntry = result.First();
var keyString = keyEntry.key;
var thash = new TigerHash();
var key = thash.ComputeHash(Encoding.ASCII.GetBytes(keyString));
// generate iv
var ivBase = BitConverter.ToUInt32(DWCrypto.GenerateRandom(4), 0);
var iv = DWCrypto.CalculateInitialVector(ivBase);
// blah
var globalKey = DWCrypto.GenerateRandom(24);
var gameTicket = DWTickets.BuildGameTicket(globalKey, state.GameID, "", 0); // 4: official
var lsgTicket = DWTickets.BuildLSGTicket(globalKey, state.KeyData, 1, "");
var encryptedGameTicket = DWCrypto.Encrypt(iv, key, gameTicket);
var reply = state.Packet.MakeReply(13, true);
reply.BitBuffer.UseDataTypes = false;
reply.BitBuffer.WriteBoolean(false);
reply.BitBuffer.WriteUInt32(700);
reply.BitBuffer.WriteUInt32(ivBase);
reply.BitBuffer.WriteBytes(encryptedGameTicket);
reply.BitBuffer.WriteBytes(lsgTicket);
reply.Send(false);
return;
}
}
catch (Exception e)
{
Log.Debug("Exception: " + e.ToString());
}
}
private static void CreateIW5ServerKey(object stateo)
{
var state = (IW5ServerAuthstate)stateo;
// obtain key auth
try
{
Log.Debug("got a request for a new IW5 dedi key; seems fun to me");
// actually the advanced RSA stuff should be used but that might be incompatible with the .NET implementation of RSA
var passGen = new PasswordGenerator();
passGen.Maximum = 20;
passGen.Minimum = 20;
var key = passGen.Generate();
key = string.Format("X{0}-{1}-{2}-{3}-{4}", key.Substring(1, 3), key.Substring(4, 4), key.Substring(8, 4), key.Substring(12, 4), key.Substring(16, 4));
var thash = new TigerHash();
var hash = thash.ComputeHash(Encoding.ASCII.GetBytes(key));
var keyHash = BitConverter.ToInt64(hash, 0);
var keyEntry = new ServerKey();
keyEntry.key = key;
keyEntry.keyHash = keyHash;
keyEntry.unkInt = new Random().Next();
Database.AServerKeys.Save(keyEntry);
var keyStuff = new byte[86];
Array.Copy(Encoding.ASCII.GetBytes(key), keyStuff, key.Length);
var obfuscationKey = "43FCB2ACF2D72593DD7CD1C69E0F03C07229F4C83166F7B05BA0C5FE3AA3A2D93EK2495783KDKN92939DK";
var i = 0;
foreach (var character in obfuscationKey)
{
keyStuff[i] ^= (byte)character;
i++;
}
// generate iv
var ivBase = BitConverter.ToUInt32(DWCrypto.GenerateRandom(4), 0);
var iv = DWCrypto.CalculateInitialVector(ivBase);
// blah
var globalKey = DWCrypto.GenerateRandom(24);
var gameTicket = DWTickets.BuildGameTicket(globalKey, state.GameID, "", (byte)0); // 4: official
var lsgTicket = DWTickets.BuildLSGTicket(globalKey, (ulong)keyHash, 1, "");
var encryptedGameTicket = DWCrypto.Encrypt(iv, hash, gameTicket);
var reply = state.Packet.MakeReply(25, true);
reply.BitBuffer.UseDataTypes = false;
reply.BitBuffer.WriteBoolean(false);
reply.BitBuffer.WriteUInt32(700);
reply.BitBuffer.WriteUInt32(ivBase);
reply.BitBuffer.WriteBytes(encryptedGameTicket);
reply.BitBuffer.WriteBytes(lsgTicket);
reply.BitBuffer.WriteBytes(keyStuff);
reply.BitBuffer.WriteInt32(keyEntry.unkInt);
reply.Send(false);
}
catch (Exception e)
{
Log.Debug("Exception: " + e.ToString());
}
}