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diff --git a/vendors/php-openid/Auth/OpenID/Interface.php b/vendors/php-openid/Auth/OpenID/Interface.php
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+<?php
+
+/**
+ * This file specifies the interface for PHP OpenID store implementations.
+ *
+ * PHP versions 4 and 5
+ *
+ * LICENSE: See the COPYING file included in this distribution.
+ *
+ * @package OpenID
+ * @author JanRain, Inc. <openid@janrain.com>
+ * @copyright 2005-2008 Janrain, Inc.
+ * @license http://www.apache.org/licenses/LICENSE-2.0 Apache
+ */
+
+/**
+ * This is the interface for the store objects the OpenID library
+ * uses. It is a single class that provides all of the persistence
+ * mechanisms that the OpenID library needs, for both servers and
+ * consumers.  If you want to create an SQL-driven store, please see
+ * then {@link Auth_OpenID_SQLStore} class.
+ *
+ * Change: Version 2.0 removed the storeNonce, getAuthKey, and isDumb
+ * methods, and changed the behavior of the useNonce method to support
+ * one-way nonces.
+ *
+ * @package OpenID
+ * @author JanRain, Inc. <openid@janrain.com>
+ */
+class Auth_OpenID_OpenIDStore {
+    /**
+     * This method puts an Association object into storage,
+     * retrievable by server URL and handle.
+     *
+     * @param string $server_url The URL of the identity server that
+     * this association is with. Because of the way the server portion
+     * of the library uses this interface, don't assume there are any
+     * limitations on the character set of the input string. In
+     * particular, expect to see unescaped non-url-safe characters in
+     * the server_url field.
+     *
+     * @param Association $association The Association to store.
+     */
+    function storeAssociation($server_url, $association)
+    {
+        trigger_error("Auth_OpenID_OpenIDStore::storeAssociation ".
+                      "not implemented", E_USER_ERROR);
+    }
+
+    /*
+     * Remove expired nonces from the store.
+     *
+     * Discards any nonce from storage that is old enough that its
+     * timestamp would not pass useNonce().
+     *
+     * This method is not called in the normal operation of the
+     * library.  It provides a way for store admins to keep their
+     * storage from filling up with expired data.
+     *
+     * @return the number of nonces expired
+     */
+    function cleanupNonces()
+    {
+        trigger_error("Auth_OpenID_OpenIDStore::cleanupNonces ".
+                      "not implemented", E_USER_ERROR);
+    }
+
+    /*
+     * Remove expired associations from the store.
+     *
+     * This method is not called in the normal operation of the
+     * library.  It provides a way for store admins to keep their
+     * storage from filling up with expired data.
+     *
+     * @return the number of associations expired.
+     */
+    function cleanupAssociations()
+    {
+        trigger_error("Auth_OpenID_OpenIDStore::cleanupAssociations ".
+                      "not implemented", E_USER_ERROR);
+    }
+
+    /*
+     * Shortcut for cleanupNonces(), cleanupAssociations().
+     *
+     * This method is not called in the normal operation of the
+     * library.  It provides a way for store admins to keep their
+     * storage from filling up with expired data.
+     */
+    function cleanup()
+    {
+        return array($this->cleanupNonces(),
+                     $this->cleanupAssociations());
+    }
+
+    /**
+     * Report whether this storage supports cleanup
+     */
+    function supportsCleanup()
+    {
+        return true;
+    }
+
+    /**
+     * This method returns an Association object from storage that
+     * matches the server URL and, if specified, handle. It returns
+     * null if no such association is found or if the matching
+     * association is expired.
+     *
+     * If no handle is specified, the store may return any association
+     * which matches the server URL. If multiple associations are
+     * valid, the recommended return value for this method is the one
+     * most recently issued.
+     *
+     * This method is allowed (and encouraged) to garbage collect
+     * expired associations when found. This method must not return
+     * expired associations.
+     *
+     * @param string $server_url The URL of the identity server to get
+     * the association for. Because of the way the server portion of
+     * the library uses this interface, don't assume there are any
+     * limitations on the character set of the input string.  In
+     * particular, expect to see unescaped non-url-safe characters in
+     * the server_url field.
+     *
+     * @param mixed $handle This optional parameter is the handle of
+     * the specific association to get. If no specific handle is
+     * provided, any valid association matching the server URL is
+     * returned.
+     *
+     * @return Association The Association for the given identity
+     * server.
+     */
+    function getAssociation($server_url, $handle = null)
+    {
+        trigger_error("Auth_OpenID_OpenIDStore::getAssociation ".
+                      "not implemented", E_USER_ERROR);
+    }
+
+    /**
+     * This method removes the matching association if it's found, and
+     * returns whether the association was removed or not.
+     *
+     * @param string $server_url The URL of the identity server the
+     * association to remove belongs to. Because of the way the server
+     * portion of the library uses this interface, don't assume there
+     * are any limitations on the character set of the input
+     * string. In particular, expect to see unescaped non-url-safe
+     * characters in the server_url field.
+     *
+     * @param string $handle This is the handle of the association to
+     * remove. If there isn't an association found that matches both
+     * the given URL and handle, then there was no matching handle
+     * found.
+     *
+     * @return mixed Returns whether or not the given association existed.
+     */
+    function removeAssociation($server_url, $handle)
+    {
+        trigger_error("Auth_OpenID_OpenIDStore::removeAssociation ".
+                      "not implemented", E_USER_ERROR);
+    }
+
+    /**
+     * Called when using a nonce.
+     *
+     * This method should return C{True} if the nonce has not been
+     * used before, and store it for a while to make sure nobody
+     * tries to use the same value again.  If the nonce has already
+     * been used, return C{False}.
+     *
+     * Change: In earlier versions, round-trip nonces were used and a
+     * nonce was only valid if it had been previously stored with
+     * storeNonce.  Version 2.0 uses one-way nonces, requiring a
+     * different implementation here that does not depend on a
+     * storeNonce call.  (storeNonce is no longer part of the
+     * interface.
+     *
+     * @param string $nonce The nonce to use.
+     *
+     * @return bool Whether or not the nonce was valid.
+     */
+    function useNonce($server_url, $timestamp, $salt)
+    {
+        trigger_error("Auth_OpenID_OpenIDStore::useNonce ".
+                      "not implemented", E_USER_ERROR);
+    }
+
+    /**
+     * Removes all entries from the store; implementation is optional.
+     */
+    function reset()
+    {
+    }
+
+}