protected void Page_Load(object sender, EventArgs e)
{
HttpCookie name = Request.Cookies["name"];
HttpCookie sign = Request.Cookies["sign"];
if (name != null && sign != null)
{
if (sign.Value == CryptoProvider.GetMD5Hash(name.Value + "s@lt"))
{
return;
}
}
Response.Redirect("Login.aspx");
}
protected void LoginButton_Click(object sender, EventArgs e)
{
if (PasswordTextBox.Text == "8888" && LoginTextBox.Text == "Tigran")
{
HttpCookie cookieName = new HttpCookie("name", LoginTextBox.Text);
HttpCookie cookieSign = new HttpCookie("sign", CryptoProvider.GetMD5Hash(LoginTextBox.Text + "s@lt"));
// In order to ensure that this cookie set was created by our page,
// and not by an attacker, we send a cookie-signature in addition to the name.
// In order to complicate the selection of the value that we put
// in the signature is used "salt" - a word or a set of symbols.
// Every time when requests come from the user,
// we will re-generate the signature and check that it matches the received one.
Response.Cookies.Add(cookieName);
Response.Cookies.Add(cookieSign);
Response.Redirect("Default.aspx");
}
else
{
ErrorLabel.Visible = true;
}
}