private void Init(string serverPublicKey = null)
{
_asyncServerCryptographyHandler = new RSACryptographyHandler();
_asyncClientCryptographyHandler = new RSACryptographyHandler { IsReady = true };
_syncCryptographyHandler = new AESCryptographyHandler();
// Send client's RSA public key and request the server's RSA public key
var request = new TcpMessage("rsakey") { Content = _asyncClientCryptographyHandler.PublicKey };
var response = SendAndReceive(request);
if (response.HasType("rsakey"))
{
var key = response.Content;
if (!string.IsNullOrEmpty(serverPublicKey) && !serverPublicKey.Equals(key))
throw new Exception("Server did not return correct public key");
_asyncServerCryptographyHandler.PublicKey = key;
}
// Request the AES key from the server
request = new TcpMessage("aeskey");
response = SendAndReceive(request);
if (response.HasType("aeskey"))
_syncCryptographyHandler.KeyAsString = response.Content;
// Request the AES initialization vector from the server
request = new TcpMessage("aesiv");
response = SendAndReceive(request);
if (response.HasType("aesiv"))
_syncCryptographyHandler.InitializationVectorAsString = response.Content;
}
public EncryptedTcpServer(string serverPublicPrivateKey, int dataPort = DefaultDataPort, int eventPort = DefaultEventPort)
: base(dataPort, eventPort)
{
_serverCryptographyHandler = new RSACryptographyHandler();
if (serverPublicPrivateKey != null)
_serverCryptographyHandler.PrivateKey = serverPublicPrivateKey;
_clients = new Dictionary<TcpConnectedHost, EncryptedClientDataContainer>();
Register(HandleRSAKeyExchangeRequest);
Register(HandleAESKeyExchangeRequest);
Register(HandleAESInitializationVectorExchangeRequest);
}
public EncryptedClientDataContainer()
{
RSAHandler = new RSACryptographyHandler();
AESHandler = new AESCryptographyHandler();
EncryptNextMessageSync = true;
EncryptNextMessageAsync = true;
}
