public static string SendCommand(string Text, HenkTcpClient Client, byte[] EncryptionKeyServer, string Password, byte[] Salt)
{
if (Text.Equals("!users"))
{
int Online = BitConverter.ToInt32(Client.WriteAndGetReply(new byte[] { 42, 6, 1 }, TimeSpan.FromSeconds(1)).DecryptedData, 0);
string Users = string.Empty;
for (int x = 0; x < Online; x++)
{
Users += ", " + AES256.decrypt(Client.WriteAndGetReply(CombineBytes(new byte[] { 42, 6, 1 }, BitConverter.GetBytes(x)), TimeSpan.FromSeconds(1)).Data, Password, Salt);
}
return($"({Online}) {Users.Remove(0, 2)}");
}
if (Text.StartsWith("!admin "))
{
Rfc2898DeriveBytes HashedAdminPassword = new Rfc2898DeriveBytes(Text.Remove(0, 7), Salt, 500000);
return(_SendCommand(CombineBytes(new byte[] { 42, 6 }, HenkTcp.Encryption.Encrypt(Aes.Create(), Encoding.UTF8.GetBytes("!admin " + Convert.ToBase64String(HashedAdminPassword.GetBytes(20))), EncryptionKeyServer)), Client));
}
else if (Text.StartsWith("!kick "))
{
return(_SendCommand(CombineBytes(new byte[] { 42, 6, 2 }, AES256.encrypt(Text.Remove(0, 6), Password, Salt)), Client));
}
else if (Text.StartsWith("!ban "))
{
return(_SendCommand(CombineBytes(new byte[] { 42, 6, 3 }, AES256.encrypt(Text.Remove(0, 5), Password, Salt)), Client));
}
else
{
return(_SendCommand(CombineBytes(new byte[] { 42, 6 }, HenkTcp.Encryption.Encrypt(Aes.Create(), Encoding.UTF8.GetBytes(Text), EncryptionKeyServer)), Client));
}
}
public static int Establish(ref byte[] EncryptionKeyServer, ref byte[] Salt, HenkTcpClient Client, string Password, string UserName, RSAKey RSAKey)
{
try
{
EncryptionKeyServer = Encryption.RSA.Decrypt(Client.WriteAndGetReply(CombineBytes(new byte[] { 42, 1 }, RSAKey.PublicKey), TimeSpan.FromSeconds(TIMESPAN)).Data, RSAKey.PrivateKey);
Client.SetEncryption(Aes.Create(), EncryptionKeyServer);
Salt = Client.WriteAndGetReply(new byte[] { 42, 2 }, TimeSpan.FromSeconds(1)).DecryptedData;
Rfc2898DeriveBytes HashedPassword = new Rfc2898DeriveBytes(Password, Salt, 250000);
byte ValidPassword = Client.WriteAndGetReply(CombineBytes(new byte[] { 42, 3 }, HenkTcp.Encryption.Encrypt(Aes.Create(), HashedPassword.GetBytes(20), EncryptionKeyServer)), TimeSpan.FromSeconds(TIMESPAN)).Data[0];
if (ValidPassword.Equals(1))
{
byte ValidUserName = Client.WriteAndGetReply(CombineBytes(new byte[] { 42, 4 }, AES256.encrypt(UserName, Password, Salt)), TimeSpan.FromSeconds(TIMESPAN)).Data[0];
if (ValidUserName.Equals(1))
{
return(3); //evrything ok
}
else
{
Client.Disconnect(); return(2);
} //UserName already taken
}
else
{
Client.Disconnect(); return(1);
} //Wrong password
}
catch { return(0); }//server did not reply on a message
}
