/// <summary>
/// Very simple method of loading the encrypted Connections file
/// Does trap CryptographicException which occurs if the file cannot be decrypted which
/// most likely is caused by a bad password, but could be due to a corrupted Connections file
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnLoadConnections_Click(object sender, EventArgs e)
{
cboConnString.Items.Clear();
if (!string.IsNullOrEmpty(txtPassword.Text))
{
try
{
xe.Key = txtPassword.Text;
// Open file and read strings into array, decrypt them one by one
string[] encConnections = File.ReadAllLines("Connections.txt");
foreach (string item in encConnections)
{
cboConnString.Items.Add(xe.Decrypt(item));
}
MessageBox.Show("Connections loaded!", "Connection Loader", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
catch (FileNotFoundException)
{
MessageBox.Show("Connections File Not Found!\n\nCreate one by clicking Connections button.", "Connection Loader", MessageBoxButtons.OK, MessageBoxIcon.Stop);
}
catch (CryptographicException)
{
MessageBox.Show("Bad Password or corrupted Connections file!\n\nConnections NOT loaded!", "Connection Loader", MessageBoxButtons.OK, MessageBoxIcon.Stop);
}
cboConnString.Refresh();
}
else
{
MessageBox.Show("Must enter the password before Loading Connections!", "Connection Maintenance", MessageBoxButtons.OK, MessageBoxIcon.Stop);
}
}
/// <summary>
/// Get the password given an email (or username)
/// </summary>
/// <param name="sEmail"></param>
/// <returns></returns>
private static string GetUserPassword(string sEmail)
{
string sRetVal = "";
try
{
string sSql = "SELECT Password FROM Users Where Email = @Email";
SqlParameter paramEmail = new SqlParameter("@Email", SqlDbType.VarChar);
paramEmail.Value = sEmail;
SqlDataReader dt = GetDataReaderWithParams(sSql, paramEmail);
if (dt.Read())
{
XCryptEngine MyScriptEngine = null;
MyScriptEngine = new XCryptEngine();
MyScriptEngine.Algorithm = XCryptEngine.AlgorithmType.DES;
MyScriptEngine.InitializeEngine();
sRetVal = MyScriptEngine.Decrypt(dt["Password"].ToString());// After Script Engine Init
MyScriptEngine.DestroyEngine();
}
}
catch (Exception ex)
{
Debug.WriteLine(ex.Message);
}
return(sRetVal);
}
private void button2_Click(object sender, System.EventArgs e)
{
if (this.encText.Text == null || this.encText.Text.Length == 0)
{
MessageBox.Show("No Encrypted Text Found", "Error");
return;
}
this.decText.Text = "";
InitializeEncryptionEngine();
xe.Key = this.keyText.Text;
this.decText.Text = xe.Decrypt(this.encText.Text);
if (chkClipPaste.Checked)
{
Clipboard.SetData(DataFormats.Text, this.encText.Text);
}
}