public void Decrypt()
{
packet = crypt.decrypt(packet, 2, packet.Length - 2);
packetBufferStream = new MemoryStream(packet);
packetBuffer = new BinaryReader(packetBufferStream);
}
public override void DataReceived(ref byte[] inputPacket)
{
if (gameData.Blowfish_Key.Length > 0)
{
LoginReader packet = new LoginReader(inputPacket, gameData);
packet.Decrypt();
byte opcode = packet.readB();
switch (opcode)
{
case 0x01:
#region Failed Login.
byte reason = packet.readB();
string message = "";
switch (reason)
{
case 0x01:
message = "System Error.";
break;
case 0x02:
message = "Password is incorrect.";
break;
case 0x03:
message = "Username or password incorrect.";
break;
case 0x04:
message = "Access Failed.";
break;
case 0x07:
message = "Account in use.";
break;
case 0x0f:
message = "Server overloaded.";
break;
case 0x10:
message = "Server undergoing maintenance.";
break;
case 0x11:
message = "Temporary password has expired.";
break;
case 0x23:
message = "Dual box detected.";
break;
}
Debug.Error("Unable to login, message from server: " + message);
Close();
break;
#endregion
case 0x0B:
#region GameGuard Response.
string name = UserConfig.Username;
string pw = UserConfig.Password;
byte[] login_info = new byte[128];
login_info[0x5B] = 0x24;
for (int i = 0; i < name.Length; i++)
{
login_info[0x5E + i] = (byte)name[i];
}
for (int i = 0; i < pw.Length; i++)
{
login_info[0x6C + i] = (byte)pw[i];
}
byte[] Exponent = { 1, 0, 1 };
System.Security.Cryptography.RSAParameters RSAKeyInfo = new System.Security.Cryptography.RSAParameters();
//Set RSAKeyInfo to the public key values.
RSAKeyInfo.Modulus = gameData.RSA_Key;
RSAKeyInfo.Exponent = Exponent;
RSA poo = new RSA();
poo.ImportParameters(RSAKeyInfo);
byte[] outb = new byte[128];
outb = poo.EncryptValue(login_info);
byte[] login_send = new byte[176];
byte[] login_sende = new byte[176];
outb.CopyTo(login_send, 1);
login_send[129] = gameData.Session[0];
login_send[130] = gameData.Session[1];
login_send[131] = gameData.Session[2];
login_send[132] = gameData.Session[3];
login_send[133] = 0x23; //gameguard reply start
login_send[134] = 0x01;
login_send[135] = 0x00;
login_send[136] = 0x00;
login_send[137] = 0x67; //
login_send[138] = 0x45;
login_send[139] = 0x00;
login_send[140] = 0x00;
login_send[141] = 0xAB; //
login_send[142] = 0x89;
login_send[143] = 0x00;
login_send[144] = 0x00;
login_send[145] = 0xEF; //
login_send[146] = 0xCD;
login_send[147] = 0x00;
login_send[148] = 0x00; //game guard reply stop
login_send[149] = 0x08; //
login_send[150] = 0x00;
login_send[151] = 0x00;
login_send[152] = 0x00;
login_send[153] = 0x00; //
login_send[154] = 0x00;
login_send[155] = 0x00;
login_send[156] = 0x00;
login_send[157] = 0x00; //
login_send[158] = 0x00;
login_send[159] = 0x00;
ulong chk = General.CheckSum(login_send, 160);
login_send[160] = (byte)(chk & 0xff);
login_send[161] = (byte)(chk >> 0x08 & 0xff);
login_send[163] = (byte)(chk >> 0x10 & 0xff);
login_send[163] = (byte)(chk >> 0x18 & 0xff);
LoginWriter pck = new LoginWriter(login_send, gameData);
pck.Encrypt();
Send(pck.Finalize());
Debug.Information("Sending login information.");
break;
#endregion
case 0x03:
#region LoginOK
byte[] send = new byte[32];
send[0] = 0x05;
send[1] = packet.readB();
send[2] = packet.readB();
send[3] = packet.readB();
send[4] = packet.readB();
send[5] = packet.readB();
send[6] = packet.readB();
send[7] = packet.readB();
send[8] = packet.readB();
send[9] = 0x04;
send[10] = 0x00;
send[11] = 0x00;
send[12] = 0x00;
send[13] = 0x00;
send[14] = 0x00;
send[15] = 0x00;
gameData.LoginOK = new byte[8];
gameData.LoginOK[0] = send[1];
gameData.LoginOK[1] = send[2];
gameData.LoginOK[2] = send[3];
gameData.LoginOK[3] = send[4];
gameData.LoginOK[4] = send[5];
gameData.LoginOK[5] = send[6];
gameData.LoginOK[6] = send[7];
gameData.LoginOK[7] = send[8];
chk = General.CheckSum(send, 16);
send[16] = (byte)(chk & 0xff);
send[17] = (byte)(chk >> 0x08 & 0xff);
send[18] = (byte)(chk >> 0x10 & 0xff);
send[19] = (byte)(chk >> 0x18 & 0xff);
pck = new LoginWriter(send, gameData);
pck.Encrypt();
Send(pck.Finalize());
break;
#endregion
case 0x04:
#region Server List
int serv_num = packet.readB();
Servers = new GameServer[serv_num];
packet.readB(); // Unknown byte
for (int i = 0; i < serv_num; i++)
{
GameServer server = new GameServer(ref UserConfig, ref gameData, ref Plugins, ref Extensions);
server.ID = packet.packetBuffer.ReadByte();
server.IP = new IPAddress(BitConverter.GetBytes(packet.packetBuffer.ReadInt32()));
server.Port = packet.packetBuffer.ReadInt32();
server.AgeLimit = packet.packetBuffer.ReadByte();
server.PvP = packet.packetBuffer.ReadByte();
server.CurrentPlayers = packet.packetBuffer.ReadInt16();
server.MaxPlayers = packet.packetBuffer.ReadInt16();
server.Online = packet.packetBuffer.ReadByte();
server.ExtraData = packet.packetBuffer.ReadInt32();
server.DisplayBrackets = packet.packetBuffer.ReadByte();
Servers[i] = server;
}
try {
selectedServer = Int32.Parse(UserConfig.GameServer) - 1;
} catch (Exception ex) {
Debug.Exception("Unable to parse which gameserver to use.", ex);
return;
}
Debug.Information("Logging into: " + General.ServerNames[selectedServer]);
byte[] buff = new byte[32];
buff[0] = 0x02;
buff[1] = gameData.LoginOK[0];
buff[2] = gameData.LoginOK[1];
buff[3] = gameData.LoginOK[2];
buff[4] = gameData.LoginOK[3];
buff[5] = gameData.LoginOK[4];
buff[6] = gameData.LoginOK[5];
buff[7] = gameData.LoginOK[6];
buff[8] = gameData.LoginOK[7];
buff[9] = Servers[selectedServer].ID;
buff[10] = 0x00;
buff[11] = 0x00;
buff[12] = 0x00;
buff[13] = 0x00;
buff[14] = 0x00;
buff[15] = 0x00;
chk = General.CheckSum(buff, 16);
buff[16] = (byte)(chk & 0xff);
buff[17] = (byte)(chk >> 0x08 & 0xff);
buff[18] = (byte)(chk >> 0x10 & 0xff);
buff[19] = (byte)(chk >> 0x18 & 0xff);
pck = new LoginWriter(buff, gameData);
pck.Encrypt();
Send(pck.Finalize());
break;
#endregion
case 0x06:
#region PlayFailed
message = "";
switch (packet.packetBuffer.ReadByte())
{
case 0x01:
message = "System Error.";
break;
case 0x02:
message = "Username or password is wrong.";
break;
case 0x03:
message = "Reason 3.";
break;
case 0x04:
message = "Reason 4.";
break;
case 0x0F:
message = "Too many players connected.";
break;
}
Debug.Error("Unable to connect to the game server, message: " + message);
break;
#endregion
case 0x07:
#region PlayOK
gameData.PlayOK = new byte[] { packet.readB(), packet.readB(), packet.readB(), packet.readB(), packet.readB(), packet.readB(), packet.readB(), packet.readB() };
Debug.Information("Transfering to the GameServer Module.");
Close();
Servers[selectedServer].StartConnect();
break;
#endregion
default:
Debug.Warning("Unknown packet: " + General.Hex(opcode));
break;
}
}
else
{
Blowfish blowfish = new Blowfish();
LoginCrypt crypt = new LoginCrypt(General.Hex(UserConfig.BlowfishKey));
#region Blowfish key stuff
Debug.Information("Attempting to get Blowfish key.");
try
{
int size = 180;
byte[] raw = inputPacket;
raw = crypt.decrypt(raw, 2, size + 4);
int key = ByteHelper.ByteIntR(raw, size - 4);
int Bloques = (size / 4) - 1;
int[] r = new int[Bloques];
int t;
for (t = Bloques - 1; t > 0; t--)
{
int p = ByteHelper.ByteIntR(raw, (4 * t)) ^ key;
r[Bloques - t - 1] = p;
key = ByteHelper.Vuelta(ByteHelper.Vuelta(key) - ByteHelper.Vuelta(p));
}
r[Bloques - 1] = ByteHelper.ByteIntR(raw, 0);
inputPacket = ByteHelper.IntByte(r);
int ia;
byte[] t2 = new byte[16];
for (ia = 0; ia < 16; ia++)
{
t2[ia] = inputPacket[153 + ia];
}
gameData.Blowfish_Key = t2;
byte[] session = new byte[4];
session[0] = inputPacket[1];
session[1] = inputPacket[2];
session[2] = inputPacket[3];
session[3] = inputPacket[4];
gameData.Session = session;
crypt = new LoginCrypt(gameData.Blowfish_Key);
}
catch (Exception ex)
{
Debug.Exception("Error getting Blowfish key", ex);
return;
}
Debug.Information("Successfully got Blowfish key:");
Debug.Information(" - " + General.Hex(gameData.Blowfish_Key));
#endregion
#region RSA key stuff
Debug.Information("Attempting to get RSA key.");
try
{
byte[] enckey = new byte[128];
for (int i = 0; i < 128; i++)
{
enckey[i] = inputPacket[9 + i];
}
for (int i = 0; i < 0x40; i++)
{
enckey[0x40 + i] = (byte)(enckey[0x40 + i] ^ enckey[i]);
}
for (int i = 0; i < 4; i++)
{
enckey[0x0d + i] = (byte)(enckey[0x0d + i] ^ enckey[0x34 + i]);
}
for (int i = 0; i < 0x40; i++)
{
enckey[i] = (byte)(enckey[i] ^ enckey[0x40 + i]);
}
for (int i = 0; i < 4; i++)
{
byte temp = enckey[0x00 + i];
enckey[0x00 + i] = enckey[0x4d + i];
enckey[0x4d + i] = temp;
}
gameData.RSA_Key = enckey;
}
catch (Exception ex)
{
Debug.Exception("Error getting RSA key", ex);
return;
}
Debug.Information("Successfully got RSA key:");
Debug.Information(" - " + General.Hex(gameData.RSA_Key));
#endregion
#region GameGuard Login stuff
try
{
byte[] send = new byte[40];
byte[] sende = new byte[40];
send[00] = 0x07;
send[01] = inputPacket[1];
send[02] = inputPacket[2];
send[03] = inputPacket[3];
send[04] = inputPacket[4];
ulong chk = General.CheckSum(send, 24);
send[24] = (byte)(chk & 0xff);
send[25] = (byte)(chk >> 0x08 & 0xff);
send[26] = (byte)(chk >> 0x10 & 0xff);
send[27] = (byte)(chk >> 0x18 & 0xff);
LoginWriter lw = new LoginWriter(send, gameData);
lw.Encrypt();
Send(lw.Finalize());
}
catch (Exception ex)
{
Debug.Exception("Error sending GameGuard packet.", ex);
return;
}
Debug.Information("Successfully sent GameGuard packet.");
#endregion
}
}