Save the current IdP choice to a cookie.
| protected setPreviousIdP ( string $idp ) | ||
| $idp | string | The entityID of the IdP. |
/**
* Save the current IdP choice to a cookie.
*
* This function overrides the corresponding function in the parent class,
* to add support for common domain cookie.
*
* @param string $idp The entityID of the IdP.
*/
protected function setPreviousIdP($idp)
{
assert('is_string($idp)');
if ($this->cdcDomain === NULL) {
parent::setPreviousIdP($idp);
return;
}
$list = $this->getCDC();
$prevIndex = array_search($idp, $list, TRUE);
if ($prevIndex !== FALSE) {
unset($list[$prevIndex]);
}
$list[] = $idp;
foreach ($list as &$value) {
$value = base64_encode($value);
}
$newCookie = implode(' ', $list);
while (strlen($newCookie) > 4000) {
/* The cookie is too long. Remove the oldest elements until it is short enough. */
$tmp = explode(' ', $newCookie, 2);
if (count($tmp) === 1) {
/*
* We are left with a single entityID whose base64
* representation is too long to fit in a cookie.
*/
break;
}
$newCookie = $tmp[1];
}
$params = array('lifetime' => $this->cdcLifetime, 'domain' => $this->cdcDomain, 'secure' => TRUE, 'httponly' => FALSE);
SimpleSAML_Utilities::setCookie('_saml_idp', $newCookie, $params, FALSE);
}
