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));
}