/**
* Validates "stay logged in" tokens and refreshes them
*
* @param boolean $newsession: flag for a new session (no validation)
*
* @return boolean true if cookie refreshed, false if cookie removed
*/
public function refreshMemoryCookie($newsession = false)
{
$modified = 0;
if ($newsession === false) {
$memoryCookie = $this->getMemoryCookie();
if ($memoryCookie !== false) {
list($id, $seriesToken, $authToken) = $memoryCookie;
$seriesTokenEsc = $this->dao->escape($seriesToken);
// existing session -> validate first
$s = $this->dao->query('
SELECT
AuthToken, SeriesToken, modified
FROM
members_sessions
WHERE
IdMember = ' . (int) $this->id . '
AND
SeriesToken = \'' . $seriesTokenEsc . '\'');
$tokens = $s->fetch(PDB::FETCH_OBJ);
// compare tokens from database with those in cookie
if ($tokens) {
$authTokenDB = $tokens->AuthToken;
$seriesToken = $tokens->SeriesToken;
$modified = $tokens->modified;
if ($authToken !== $authTokenDB) {
// auth token incorrect but series token correct -> hijacked
$this->removeSessionMemory($seriesToken, true);
return false;
}
} else {
// both tokens (or just series token) incorrect
$this->removeSessionMemory($seriesToken);
return false;
}
} else {
$this->removeSessionMemory();
// just to clean up token records in database
return false;
}
// both tokens correct -> continue
// log in user
$loginModel = new LoginModel();
$tb_user = $loginModel->getTBUserForBWMember($this);
$loginModel->setupBWSession($this);
$loginModel->setTBUserAsLoggedIn($tb_user);
} else {
// create series token
$seriesToken = md5(rand() + time());
}
// create auth token
$authToken = md5(rand() + time());
// write tokens to database
if ($modified) {
// update token from existing series
$s = $this->dao->query('
UPDATE
members_sessions
SET
AuthToken = \'' . $authToken . '\'
WHERE
IdMember = ' . (int) $this->id . ' AND SeriesToken = \'' . $seriesToken . '\'');
} else {
// create new token series
$s = $this->dao->query('
INSERT INTO
members_sessions
(IdMember, AuthToken, SeriesToken)
VALUES
(' . (int) $this->id . ', \'' . $authToken . '\', \'' . $seriesToken . '\')');
}
// create cookie
$this->setMemoryCookie($this->id, $seriesToken, $authToken);
return true;
}