public void Process(byte[] buffer, Connection connection)
{
var key = connection.AesKey.GetClientKey();
var iv = connection.AesKey.GetClientIv();
var aes = new AesCryptography()
{
CipherMode = System.Security.Cryptography.CipherMode.CBC,
KeySize = AesKeySize.KeySize128,
PaddingMode = System.Security.Cryptography.PaddingMode.PKCS7
};
var decrypted = aes.Decrypt(buffer, key, iv, out var sucess);
if (sucess)
{
var msg = new ByteBuffer(decrypted);
var fileName = msg.ReadString();
var fileLength = msg.ReadInt64();
var length = msg.ReadInt32();
var bytes = msg.ReadBytes(length);
FileDownload handler;
if (Authentication.FileDownloader.ContainsKey(connection.UniqueKey))
{
handler = Authentication.FileDownloader[connection.UniqueKey];
if (handler.FileName != fileName)
{
handler.SetFileData(connection.UniqueKey, fileName, fileLength);
handler.Close();
handler.Reset();
}
}
else
{
handler = new FileDownload();
handler.SetFileData(connection.UniqueKey, fileName, fileLength);
Authentication.AddDownloadHandler(connection.UniqueKey, handler);
}
if (!handler.Completed)
{
if (!handler.IsOpen)
{
handler.Open();
}
handler.Save(bytes);
}
}
else
{
connection.Disconnect();
Global.WriteLog($"Failed to decrypt file packet.", "Black");
}
}