public EncryptedClientDataContainer()
{
RSAHandler = new RSACryptographyHandler();
AESHandler = new AESCryptographyHandler();
EncryptNextMessageSync = true;
EncryptNextMessageAsync = true;
}
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;
}
}
