private void btnEncode_Click(object sender, EventArgs e)
        {
            if (string.IsNullOrEmpty(tbEncodeKey.Text))
            {
                MessageBox.Show("No encryption key provided");
                return;
            }
            if (string.IsNullOrEmpty(tbMessage.Text))
            {
                MessageBox.Show("No message to encrypt provided");
                return;
            }
            if (loadedImg == null)
            {
                MessageBox.Show("No image to encrypt messages in provided");
                return;
            }
            if (string.IsNullOrEmpty(tbSteganographicKey.Text))
            {
                if (MessageBox.Show("No steganographic key found. Re-use the encryption key instead?", "", MessageBoxButtons.YesNo) == DialogResult.Yes)
                {
                    tbSteganographicKey.Text = tbEncodeKey.Text;
                }
                else
                {
                    return;
                }
            }

            byte[] inputKey     = Encoding.UTF8.GetBytes(tbEncodeKey.Text);
            byte[] inputSKey    = Encoding.UTF8.GetBytes(tbSteganographicKey.Text);
            byte[] inputMessage = Encoding.UTF8.GetBytes(tbMessage.Text);

            DataCipher.EncryptAes(inputKey, inputMessage, out byte[] bytesToEncode);
            if (ImageConversion.EncodeMessageInImage(loadedImg, bytesToEncode, inputSKey, out Bitmap cipheredImage))
            {
                encodedImg     = cipheredImage;
                pbImage2.Image = encodedImg;
            }
            else
            {
                MessageBox.Show("The provided image was not big enough to encrypt the message in.");
            }
        }
        private void TestMethods()
        {
            byte[] inputKey     = Encoding.UTF8.GetBytes("ayyylmao nice key");
            byte[] inputMessage = Encoding.UTF8.GetBytes("super secret string to encode");
            byte[] inputSKey    = Encoding.UTF8.GetBytes("superkey");

            //SHA test
            // DataCipher.CalculateHashSha512(inputKey, out byte[] output);
            // MessageBox.Show("SHA result in bits: " + (output.Length * 8).ToString());

            //AES+Image encoding test
            DataCipher.EncryptAes(inputKey, inputMessage, out byte[] output2);
            Bitmap image = (Bitmap)ImageConversion.LoadImageFromPath("C:\\Users\\knied\\Desktop\\60464685_1279936355495345_8126159015446052864_n.jpg");

            ImageConversion.EncodeMessageInImage(image, output2, inputSKey, out Bitmap cipheredImage);
            ImageConversion.DecodeMessageInImage(cipheredImage, inputSKey, out byte[] output3);

            DataCipher.DecryptAes(inputKey, output3, out byte[] output4);
            MessageBox.Show("Message after operations: " + Encoding.UTF8.GetString(output4));
        }