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<?php
/**
* Uses Elgg data model to store OpenID associations
*
* Written to be compatible with the Elgg store written by Kevin Jardine for
* the original OpenID client plugin.
*/
class OpenID_ElggStore extends Auth_OpenID_OpenIDStore {
/**
* Store an association
*
* @param string $server_url The identity server endpoint
* @param Auth_OpenID_Association $association The association to store.
*/
public function storeAssociation($server_url, $association) {
$object = new ElggObject();
$object->subtype = 'openid_client::association';
$object->owner_guid = 0;
$object->container_guid = 0;
$object->title = 'association';
$object->access_id = ACCESS_PUBLIC;
$object->server_url = $server_url;
$object->handle = $association->handle;
$object->secret = base64_encode($association->secret);
$object->issued = $association->issued;
$object->lifetime = $association->lifetime;
$object->expires = $object->issued + $object->lifetime;
$object->assoc_type = $association->assoc_type;
$object->save();
}
/**
* Get an association
*
* @param string $server_url The identity server endpoint
* @param string $handle The association handle
* @return Auth_OpenID_Association
*/
public function getAssociation($server_url, $handle = null) {
$assocs = $this->getAssociations($server_url, $handle);
if (!$assocs || count($assocs) == 0) {
return null;
} else {
$associations = array();
foreach ($assocs as $object) {
$assoc = new Auth_OpenID_Association(
$object->handle,
base64_decode($object->secret),
$object->issued,
$object->lifetime,
$object->assoc_type);
if ($assoc->getExpiresIn() == 0) {
$this->removeAssociation($server_url, $assoc->handle);
} else {
$associations[] = array($assoc->issued, $assoc);
}
}
if ($associations) {
$issued = array();
$assocs = array();
foreach ($associations as $key => $assoc) {
$issued[$key] = $assoc[0];
$assocs[$key] = $assoc[1];
}
array_multisort($issued, SORT_DESC, $assocs, SORT_DESC, $associations);
// return the most recently issued one.
list($issued, $assoc) = $associations[0];
return $assoc;
} else {
return null;
}
}
}
/**
* Remove selected associations from storage
*
* @param string $server_url The identity server endpoint
* @param string $handle The association handle
*/
public function removeAssociation($server_url, $handle) {
$assocs = $this->getAssociations($server_url, $handle);
foreach ($assocs as $assoc) {
$assoc->delete();
}
}
/**
* Get all associations
*
* @param string $server_url The identity server endpoint
* @param string $handle The association handle
* @return array
*/
protected function getAssociations($server_url, $handle) {
$options = array(
'type' => 'object',
'subtype' => 'openid_client::association',
'metadata_name_value_pairs' => array(
array('name' => 'server_url', 'value' => $server_url)
),
'limit' => 0,
);
if ($handle !== null) {
$options['metadata_name_value_pairs'][] = array(
'name' => 'handle',
'value' => $handle
);
}
return elgg_get_entities_from_metadata($options);
}
/**
* Cleanup associations that have expired
*
* @todo I think we need to store expire time ans use that here
*
* @return int
*/
public function cleanupAssociations() {
$options = array(
'type' => 'object',
'subtype' => 'openid_client::association',
'metadata_name_value_pairs' => array(
array('name' => 'expires', 'value' => time(), 'operand' => '<')
),
'limit' => 0,
);
$associations = elgg_get_entities_from_metadata($options);
$total = count($associations);
foreach ($associations as $association) {
$association->delete();
}
return $total;
}
/**
* Can we use this nonce?
*
* Checks time skew and replay
*
* @param type $server_url The identity server endpoint
* @param type $timestamp The timestamp from the nonce
* @param type $salt The salt from the nonce
* @return bool
*/
public function useNonce($server_url, $timestamp, $salt) {
global $Auth_OpenID_SKEW;
if (abs($timestamp - time()) > $Auth_OpenID_SKEW) {
return false;
}
// @todo
// we should check if nonce has been used before to guard against replays
return true;
}
/**
* Cleanup nonces that would not pass the time skew test
*
* @return int
*/
public function cleanupNonces() {
global $Auth_OpenID_SKEW;
$cutoff = time() - $Auth_OpenID_SKEW;
// @todo
return 0;
}
/**
* Does this storage class support cleanup?
*
* @return bool
*/
public function supportsCleanup() {
return true;
}
/**
* Cleanup expired data in storage
*
* @return array
*/
public function cleanup() {
return array($this->cleanupNonces(), $this->cleanupAssociations());
}
/**
* Remove everything from storage
*
* @return void
*/
public function reset() {
$associations = elgg_get_entities(array(
'type' => 'object',
'subtype' => 'openid_client::association',
'limit' => 0,
));
foreach ($associations as $association) {
$association->delete();
}
$nonces = elgg_get_entities(array(
'type' => 'object',
'subtype' => 'openid_client::nonce',
'limit' => 0,
));
foreach ($nonces as $nonce) {
$nonce->delete();
}
}
}
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