openid.php

<?php
/**
 * Plugin Name: OpenID
 * Plugin URI: https://wordpress.org/plugins/openid
 * Description: Allows the use of OpenID for account registration, authentication, and commenting.  Also includes an OpenID provider which can turn WordPress author URLs into OpenIDs.
 * Author: DiSo Development Team
 * Author URI: http://diso-project.org/
 * Version: 3.6.1
 * Requires PHP: 5.6
 * License: Apache 2.0
 * License URI: https://www.apache.org/licenses/LICENSE-2.0
 * Text Domain: openid
 */

// this needs to be on a separate line so that svn:keywords can work its magic
define( 'OPENID_PLUGIN_REVISION', preg_replace( '/\$Rev: (.+) \$/', '\\1', '$Rev: 519 $' ) );

// last plugin revision that required database schema changes
define( 'OPENID_DB_REVISION', 24426 );

// default values for which modules to activate
if ( ! defined( 'OPENID_ENABLE_CONSUMER' ) ) {
	define( 'OPENID_ENABLE_CONSUMER', true );
}
if ( ! defined( 'OPENID_ENABLE_COMMENTS' ) ) {
	define( 'OPENID_ENABLE_COMMENTS', true );
}
if ( ! defined( 'OPENID_ENABLE_SERVER' ) ) {
	define( 'OPENID_ENABLE_SERVER', true );
}
if ( ! defined( 'OPENID_ENABLE_ADMIN_PANELS' ) ) {
	define( 'OPENID_ENABLE_ADMIN_PANELS', true );
}


$openid_include_path = dirname( __FILE__ ) . '/lib';

// check source of randomness
if ( ! @is_readable( '/dev/urandom' ) ) {
	define( 'Auth_OpenID_RAND_SOURCE', null );
}

set_include_path( $openid_include_path . PATH_SEPARATOR . get_include_path() );

require_once dirname( __FILE__ ) . '/common.php';
require_once dirname( __FILE__ ) . '/store.php';

if ( OPENID_ENABLE_CONSUMER ) {
	require_once dirname( __FILE__ ) . '/consumer.php';
	require_once dirname( __FILE__ ) . '/login.php';
}

if ( OPENID_ENABLE_ADMIN_PANELS ) {
	require_once dirname( __FILE__ ) . '/admin_panels.php';
}

if ( OPENID_ENABLE_CONSUMER && OPENID_ENABLE_COMMENTS ) {
	require_once dirname( __FILE__ ) . '/comments.php';
}

if ( OPENID_ENABLE_SERVER ) {
	require_once dirname( __FILE__ ) . '/server.php';
}

// register activation (and similar) hooks
register_activation_hook( 'openid/openid.php', 'openid_activate_plugin' );
register_deactivation_hook( 'openid/openid.php', 'openid_deactivate_plugin' );
register_uninstall_hook( 'openid/openid.php', 'openid_uninstall_plugin' );

// run activation function if new revision of plugin
if ( get_option( 'openid_plugin_revision' ) === false || OPENID_PLUGIN_REVISION != get_option( 'openid_plugin_revision' ) ) {
	add_action( 'admin_init', 'openid_activate_plugin' );
}


// ---------------- //
// Public Functions //
// ---------------- //

/**
 * Check if the user has any OpenIDs.
 *
 * @param mixed $user the username or ID.  If not provided, the current user will be used.
 * @return bool true if the user has any OpenIDs
 * @since 1.0
 */
function is_user_openid( $user = null ) {
	$urls = get_user_openids( $user );
	return ( ! empty( $urls ) );
}


/**
 * Check if the current comment was submitted using an OpenID. Useful for
 * <pre><?php echo ( is_comment_openid() ? 'Submitted with OpenID' : '' ); ?></pre>
 *
 * @param int $id comment ID to check for.  If not provided, the current comment will be used.
 * @return bool true if the comment was submitted using an OpenID
 * @access public
 * @since 1.0
 */
function is_comment_openid( $id = null ) {
	if ( is_numeric( $id ) ) {
		$comment = get_comment( $id );
	} else {
		global $comment;
	}

	if ( ! $comment ) {
		return false;
	}

	$openid_comments = get_post_meta( $comment->comment_post_ID, 'openid_comments', true );

	if ( is_array( $openid_comments ) ) {
		if ( in_array( $comment->comment_ID, $openid_comments ) ) {
			return true;
		}
	}

	return false;
}


/**
 * Get the OpenID identities for the specified user.
 *
 * @param mixed $id_or_name the username or ID.  If not provided, the current user will be used.
 * @return array array of user's OpenID identities
 * @access public
 * @since 3.0
 */
function get_user_openids( $id_or_name = null ) {
	$user = get_userdata_by_various( $id_or_name );

	if ( $user ) {
		global $wpdb;
		return $wpdb->get_col( $wpdb->prepare( 'SELECT url FROM ' . openid_identity_table() . ' WHERE user_id = %s', $user->ID ) );
	} else {
		return array();
	}
}


/**
 * Get the user associated with the specified OpenID.
 *
 * @param string $openid identifier to match
 * @return int|null ID of associated user, or null if no associated user
 * @access public
 * @since 3.0
 */
function get_user_by_openid( $url ) {
	global $wpdb;
	return $wpdb->get_var( $wpdb->prepare( 'SELECT user_id FROM ' . openid_identity_table() . ' WHERE url = %s', $url ) );
}


/**
 * Get a simple OpenID input field.
 *
 * @access public
 * @since 2.0
 */
function openid_input() {
	return '<input type="text" id="openid_identifier" name="openid_identifier" />';
}


/**
 * Convenience method to get user data by ID, username, or from current user.
 *
 * @param mixed $id_or_name the username or ID.  If not provided, the current user will be used.
 * @return bool|object False on failure, User DB row object
 * @access public
 * @since 3.0
 */
if ( ! function_exists( 'get_userdata_by_various' ) ) :
	function get_userdata_by_various( $id_or_name = null ) {
		if ( null === $id_or_name ) {
			if ( ! is_user_logged_in() ) {
				return false;
			}
			$user = wp_get_current_user();
			if ( null === $user ) {
				return false;
			}
			return $user->data;
		} elseif ( is_numeric( $id_or_name ) ) {
			return get_user_by( 'id', $id_or_name );
		} else {
			return get_user_by( 'login', $id_or_name );
		}
	}
endif;

// -- end of public functions


/**
 * Get the file for the plugin, including the path.  This method will handle the case where the
 * actual plugin files do not reside within the WordPress directory on the filesystem (such as
 * a symlink).  The standard value should be 'openid/openid.php' unless files or folders have
 * been renamed.
 *
 * @return string plugin file
 */
function openid_plugin_file() {
	static $file;

	if ( empty( $file ) ) {
		$path = 'openid';

		$base = plugin_basename( __FILE__ );
		if ( __FILE__ != $base ) {
			$path = basename( dirname( $base ) );
		}

		$file = $path . '/' . basename( __FILE__ );
	}

	return $file;
}