function confirm()
{
$code = request::post('pppcode')->toString();
$user = session::get('username');
if ($code) {
if (User::authenticate(new PppAuthentication($user, (string) $code))) {
printf('<h1>Success.</h1>');
return;
} else {
printf('Failure');
}
}
$code = PppAuthentication::getNextIdentifier($user);
printf('<form action="/ppp/confirm" method="post">');
printf('<p>Enter code <b>%s</b>: <input type="text" name="pppcode"></p>', PppAuthentication::cardIndexToString($code));
printf('<p><input type="submit"></p>');
printf('</form>');
}
