private void HDecode(object sender, EventArgs e)
{
try
{
if (IsPasswordEnabled)
{
Impersonate(true);
}
var ct = Ciphertext.Value;
if (ct.XIsBlank() && !Setting.Value.XIsBlank())
{
try
{
var xml = MXml.LoadText(Setting);
ct = xml.X("value");
}
catch { throw MException.MessageException("Setting xml tag is not valid."); }
if (ct.XIsBlank())
{
throw MException.MessageException("Setting xml tag had no value attribute.");
}
}
Plaintext.Value = ct.XDecrypt();
}
catch (Exception ex)
{
ex = AnalyzeException(ex);
ex.XHandle("decrypting");
}
finally
{
Impersonate(false);
}
}
private static Exception AnalyzeException(Exception ex)
{
if (ex.Message.StartsWith("Key not valid in specified state"))
{
ex = MException.MessageException(ex.Message + " - please verify that the username matches the user originally used to create this secure string.");
}
if (ex.Message.Contains("data is invalid"))
{
ex = MException.MessageException("The ciphertext data blob is invalid.");
}
return(ex);
}