private void NotificationHandler(string notificationInJson)
{
Notification notification = JsonSerializer.Deserialize <Notification>(notificationInJson);
aesEncryption.SetKey(chatKey);
string decryptedMessage = coding.Decode(aesEncryption.Decrypt(notification.EncryptedMessage));
Console.WriteLine($"{notification.Sender}: {decryptedMessage}");
}
private void KeyExchange()
{
while (true)
{
// send to the client server public key [and other credentials]
tcpClient.Send(server.rsa.ExportRSAPublicKey());
// get key for symmetric encryption from client
byte[] encryptedMessageWithKey = tcpClient.GetMessage();
try
{
byte[] messageWithKeyBytes = server.rsa.Decrypt(encryptedMessageWithKey, false);
string messageWithKeyInJson = coding.Decode(messageWithKeyBytes);
AesKeyExchangeRequest aesKeyExchangeRequest = JsonSerializer.Deserialize <AesKeyExchangeRequest>(messageWithKeyInJson);
aesEncryption.SetKey(aesKeyExchangeRequest.Key);
aesEncryption.SetIV(aesKeyExchangeRequest.IV);
ClientAesKey = aesEncryption.GetKey();
AesKeyExchangeResponse response = new AesKeyExchangeResponse {
Code = StatusCode.Ok,
RequestId = aesKeyExchangeRequest.Id
};
SendMessageAesEncrypted(response, ClientAesKey);
return;
}
catch (Exception exception)
{
Console.WriteLine(exception.Message);
}
}
}