private void DecryptFile()
{
byte[] message = File.ReadAllBytes(file_textBox.Text);
BigInteger key = BigInteger.Parse(closedKey_textBox.Text);
BigInteger r = BigInteger.Parse(r_textBox.Text);
byte[] result = new byte[message.Length / 2];
try
{
result = RSAEncryptor.Decrypt(message, key, r);
}
catch (ArithmeticException ex)
{
MessageBox.Show(ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
string resultText = "";
foreach (var num in result)
{
resultText += num.ToString() + " ";
}
result_textBox.Text = resultText;
if (saveFileDialog.ShowDialog() == DialogResult.OK)
{
File.WriteAllBytes(saveFileDialog.FileName, result);
}
}
public void EncryptsAndDecryptsMessages(byte[] message, string pubKey, string privKey)
{
// Arrange
var keyParser = new PemRSAKeyParser();
var target = new RSAEncryptor();
keyParser.TryParsePublic(pubKey, out RSAParameters publicKey);
keyParser.TryParsePrivate(privKey, out RSAParameters privateKey);
// Act
var encryptedMessage = target.Encrypt(message, publicKey);
var decryptedMessage = target.Decrypt(encryptedMessage, privateKey);
// Assert
Assert.Equal(message, decryptedMessage);
}