private void CreateNewEncryptDataOnUserPathButton_Click(object sender, EventArgs e)
{
SaveFileDialog.Title = "Save New Key and IV";
if (SaveFileDialog.ShowDialog() == DialogResult.OK)
{
EncryptedTextBox.Clear();
if (AES.Checked)
{
Symmetry = new AesEncoder();
}
else
{
Symmetry = new RijndaelEncoder();
}
string filePath = EncodersIOManager.WriteKeyAndIVInFile(Symmetry, SaveFileDialog.FileName);
MessageBox.Show($"Your Key and IV were saved successfully at {filePath}",
"Data Saved",
MessageBoxButtons.OK,
MessageBoxIcon.Information);
}
SaveFileDialog.Dispose();
}
private void SaveKeyAndIVDataOnUserPathButton_Click(object sender, EventArgs e)
{
try
{
if (Symmetry is null)
{
throw new NullReferenceException("Current Key and IV are not installed in the program!");
}
if ((AES.Checked && Symmetry is RijndaelEncoder) || (Rijndael.Checked && Symmetry is AesEncoder))
{
throw new FormatException("Key and IV cannot be saved because they belong to another encryption algorithm!");
}
SaveFileDialog.Title = "Save Key and IV";
if (SaveFileDialog.ShowDialog() == DialogResult.OK)
{
string filePath = EncodersIOManager.WriteKeyAndIVInFile(Symmetry, SaveFileDialog.FileName);
MessageBox.Show($"Your Key and IV were saved successfully at {filePath}",
"Data Saved",
MessageBoxButtons.OK,
MessageBoxIcon.Information);
}
SaveFileDialog.Dispose();
}
catch (Exception Ex)
{
MessageBox.Show(Ex.Message,
Ex.GetType().Name,
MessageBoxButtons.OK,
MessageBoxIcon.Error);
File.WriteAllText(Path.Combine(Directory.GetCurrentDirectory(), "log.txt"),
Ex.ToString());
}
}
private void EncryptOrDecryptTextFromFileButton_Click(object sender, EventArgs e)
{
try
{
if (!File.Exists(PathInputTextBox.Text))
{
throw new FileNotFoundException("The file on the path you specified does not exist!");
}
if (AES.Checked && !(Symmetry is AesEncoder))
{
Symmetry = new AesEncoder();
}
else if (Rijndael.Checked && !(Symmetry is RijndaelEncoder))
{
Symmetry = new RijndaelEncoder();
}
string fileName = Symmetry is AesEncoder ? "AESEncryptionData.txt" : "RijndaelEncryptionData.txt";
string filePath = null;
if (Encrypt.Checked) //encrypt text
{
SaveFileDialog.Title = "Select a file to save encrypted text";
if (SaveFileDialog.ShowDialog() == DialogResult.OK)
{
//Encryption:
var encryptedBytes = Symmetry.EncryptStringIntoBytes(File.ReadAllText(PathInputTextBox.Text));
File.WriteAllBytes(SaveFileDialog.FileName, encryptedBytes);
string dataFilePath = string.Concat(SaveFileDialog.FileName, '.', fileName);
EncodersIOManager.WriteKeyAndIVInFile(Symmetry, dataFilePath);
MessageBox.Show($"Encrypted text was saved to file at {SaveFileDialog.FileName};" +
$"\ndata for decrypt was saved to file at {dataFilePath}",
"Encryption Complete",
MessageBoxButtons.OK,
MessageBoxIcon.Information);
EncryptedTextBox.Text = System.Text.Encoding.Default.GetString(encryptedBytes);
}
SaveFileDialog.Dispose();
}
else //decrypt text
{
SaveFileDialog.Title = "Select a file to save decrypted text";
if (SaveFileDialog.ShowDialog() == DialogResult.OK)
{
//Decryption:
EncryptedTextBox.Text = Symmetry.DecryptStringFromBytes(File.ReadAllBytes(PathInputTextBox.Text));
File.WriteAllText(SaveFileDialog.FileName, EncryptedTextBox.Text);
MessageBox.Show($"Decrypted text was saved to file at {filePath}",
"Decryption completed",
MessageBoxButtons.OK,
MessageBoxIcon.Information);
}
SaveFileDialog.Dispose();
}
}
catch (Exception Ex)
{
MessageBox.Show(Ex.Message,
Ex.GetType().Name,
MessageBoxButtons.OK,
MessageBoxIcon.Error);
File.WriteAllText(Path.Combine(Directory.GetCurrentDirectory(), "log.txt"),
Ex.ToString());
}
}