--- /dev/null
+<?php
+
+/**
+ * This file supplies a memcached store backend for OpenID servers and
+ * consumers.
+ *
+ * PHP versions 4 and 5
+ *
+ * LICENSE: See the COPYING file included in this distribution.
+ *
+ * @package OpenID
+ * @author Artemy Tregubenko <me@arty.name>
+ * @copyright 2008 JanRain, Inc.
+ * @license http://www.apache.org/licenses/LICENSE-2.0 Apache
+ * Contributed by Open Web Technologies <http://openwebtech.ru/>
+ */
+
+/**
+ * Import the interface for creating a new store class.
+ */
+require_once 'Auth/OpenID/Interface.php';
+
+/**
+ * This is a memcached-based store for OpenID associations and
+ * nonces.
+ *
+ * As memcache has limit of 250 chars for key length,
+ * server_url, handle and salt are hashed with sha1().
+ *
+ * Most of the methods of this class are implementation details.
+ * People wishing to just use this store need only pay attention to
+ * the constructor.
+ *
+ * @package OpenID
+ */
+class Auth_OpenID_MemcachedStore extends Auth_OpenID_OpenIDStore {
+
+ /**
+ * Initializes a new {@link Auth_OpenID_MemcachedStore} instance.
+ * Just saves memcached object as property.
+ *
+ * @param resource connection Memcache connection resourse
+ */
+ function Auth_OpenID_MemcachedStore($connection, $compress = false)
+ {
+ $this->connection = $connection;
+ $this->compress = $compress ? MEMCACHE_COMPRESSED : 0;
+ }
+
+ /**
+ * Store association until its expiration time in memcached.
+ * Overwrites any existing association with same server_url and
+ * handle. Handles list of associations for every server.
+ */
+ function storeAssociation($server_url, $association)
+ {
+ // create memcached keys for association itself
+ // and list of associations for this server
+ $associationKey = $this->associationKey($server_url,
+ $association->handle);
+ $serverKey = $this->associationServerKey($server_url);
+
+ // get list of associations
+ $serverAssociations = $this->connection->get($serverKey);
+
+ // if no such list, initialize it with empty array
+ if (!$serverAssociations) {
+ $serverAssociations = array();
+ }
+ // and store given association key in it
+ $serverAssociations[$association->issued] = $associationKey;
+
+ // save associations' keys list
+ $this->connection->set(
+ $serverKey,
+ $serverAssociations,
+ $this->compress
+ );
+ // save association itself
+ $this->connection->set(
+ $associationKey,
+ $association,
+ $this->compress,
+ $association->issued + $association->lifetime);
+ }
+
+ /**
+ * Read association from memcached. If no handle given
+ * and multiple associations found, returns latest issued
+ */
+ function getAssociation($server_url, $handle = null)
+ {
+ // simple case: handle given
+ if ($handle !== null) {
+ // get association, return null if failed
+ $association = $this->connection->get(
+ $this->associationKey($server_url, $handle));
+ return $association ? $association : null;
+ }
+
+ // no handle given, working with list
+ // create key for list of associations
+ $serverKey = $this->associationServerKey($server_url);
+
+ // get list of associations
+ $serverAssociations = $this->connection->get($serverKey);
+ // return null if failed or got empty list
+ if (!$serverAssociations) {
+ return null;
+ }
+
+ // get key of most recently issued association
+ $keys = array_keys($serverAssociations);
+ sort($keys);
+ $lastKey = $serverAssociations[array_pop($keys)];
+
+ // get association, return null if failed
+ $association = $this->connection->get($lastKey);
+ return $association ? $association : null;
+ }
+
+ /**
+ * Immediately delete association from memcache.
+ */
+ function removeAssociation($server_url, $handle)
+ {
+ // create memcached keys for association itself
+ // and list of associations for this server
+ $serverKey = $this->associationServerKey($server_url);
+ $associationKey = $this->associationKey($server_url,
+ $handle);
+
+ // get list of associations
+ $serverAssociations = $this->connection->get($serverKey);
+ // return null if failed or got empty list
+ if (!$serverAssociations) {
+ return false;
+ }
+
+ // ensure that given association key exists in list
+ $serverAssociations = array_flip($serverAssociations);
+ if (!array_key_exists($associationKey, $serverAssociations)) {
+ return false;
+ }
+
+ // remove given association key from list
+ unset($serverAssociations[$associationKey]);
+ $serverAssociations = array_flip($serverAssociations);
+
+ // save updated list
+ $this->connection->set(
+ $serverKey,
+ $serverAssociations,
+ $this->compress
+ );
+
+ // delete association
+ return $this->connection->delete($associationKey);
+ }
+
+ /**
+ * Create nonce for server and salt, expiring after
+ * $Auth_OpenID_SKEW seconds.
+ */
+ function useNonce($server_url, $timestamp, $salt)
+ {
+ global $Auth_OpenID_SKEW;
+
+ // save one request to memcache when nonce obviously expired
+ if (abs($timestamp - time()) > $Auth_OpenID_SKEW) {
+ return false;
+ }
+
+ // returns false when nonce already exists
+ // otherwise adds nonce
+ return $this->connection->add(
+ 'openid_nonce_' . sha1($server_url) . '_' . sha1($salt),
+ 1, // any value here
+ $this->compress,
+ $Auth_OpenID_SKEW);
+ }
+
+ /**
+ * Memcache key is prefixed with 'openid_association_' string.
+ */
+ function associationKey($server_url, $handle = null)
+ {
+ return 'openid_association_' . sha1($server_url) . '_' . sha1($handle);
+ }
+
+ /**
+ * Memcache key is prefixed with 'openid_association_' string.
+ */
+ function associationServerKey($server_url)
+ {
+ return 'openid_association_server_' . sha1($server_url);
+ }
+
+ /**
+ * Report that this storage doesn't support cleanup
+ */
+ function supportsCleanup()
+ {
+ return false;
+ }
+}
+
+?>
\ No newline at end of file
projects / quix0rs-gnu-social.git / blobdiff