public bool IsKeyValid(string key, string parameter = "ping", string data = "pong")
{
// Play ping-pong to get a score.
NetRequest game = new NetRequest(scripts[nameof(IsKeyValid)].Address, NetRequest.RequestType.POST, (parameter + "=" + data));
string score = game.GetResponse();
// Try to decrypt our score.
if (DecryptData(key, Encoding.ASCII.GetBytes(score)))
{
return(true); // The key is good... obviously...
}
return(false); // The key could not be authenticated.
}
/// <summary>
/// Obtains a blacklist from a webserver using a PHP script and the provided <see cref="RSACryptoServiceProvider"/> public key.
/// </summary>
/// <param name="key">The public key to used to use for cryptographic transformations.</param>
private string[] GetBlacklist(string key)
{
// Import our public key.
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
rsa.FromXmlString(key);
// Encrypt a chunk of data so our server can verify it's really us.
string data = (rsa.Encrypt(("Hello").GetBytes(), false)).GetString();
NetRequest request = new NetRequest(Website, NetRequest.RequestType.POST, "chunk=" + data);
string response = request.GetResponse();
// Try to decrypt the server's response so we can verify it's really the server.
try
{
string decrypted = (rsa.Decrypt(response.GetBytes(), false)).GetString();
string[] blacklist = decrypted.Split('|');
return(blacklist);
}
catch { return(null); }
}