protected void DecryptCommand_Click(object sender, EventArgs e)
{
// Check for encryption key
if (!File.Exists(KeyFileName))
{
Response.Write("Missing encryption key. Please generate key!");
}
try
{
byte[] data = Convert.FromBase64String(EncryptedDataText.Text);
ClearDataText.Text = SymmetricEncryptionUtility.DecryptData(data, KeyFileName);
}
catch
{
Response.Write("Unable to decrypt data!");
}
}
protected void LoadCommand_Click(object sender, EventArgs e)
{
try
{
DemoDb.Open();
}
catch (Exception ex)
{
// Log the error but don't
// display any details to the user
System.Diagnostics.Debug.WriteLine("Exception: " + ex.Message);
// Access to DB failed
Response.Write("Loading data failed!");
return;
}
try
{
string SqlText = "SELECT * FROM ShopInfo WHERE UserId=@key";
SqlCommand Cmd = new SqlCommand(SqlText, DemoDb);
Cmd.Parameters.AddWithValue("@key", Membership.GetUser().ProviderUserKey);
using (SqlDataReader Reader = Cmd.ExecuteReader())
{
if (Reader.Read())
{
// Cleartext Data
StreetText.Text = Reader["Street"].ToString();
ZipCodeText.Text = Reader["ZipCode"].ToString();
CityText.Text = Reader["City"].ToString();
// Encrypted Data
byte[] SecretCard = (byte[])Reader["CreditCard"];
CreditCardText.Text =
SymmetricEncryptionUtility.DecryptData(
SecretCard, EncryptionKeyFile);
}
}
}
finally
{
DemoDb.Close();
}
}