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<?php |
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|
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/* |
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Plugin Name: Password Protected |
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Plugin URI: http://wordpress.org/extend/plugins/password-protected/ |
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Description: A very simple way to quickly password protect your WordPress site with a single password. Integrates seamlessly into your WordPress privacy settings. |
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Version: 1.7.1 |
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Author: Ben Huson |
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Text Domain: password-protected |
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Author URI: http://www.benhuson.co.uk/ |
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License: GPLv2 |
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*/ |
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|
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/* |
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Copyright 2012 Ben Huson (email : ben@thewhiteroom.net) |
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|
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This program is free software; you can redistribute it and/or modify |
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it under the terms of the GNU General Public License, version 2, as |
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published by the Free Software Foundation. |
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|
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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|
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You should have received a copy of the GNU General Public License |
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along with this program; if not, write to the Free Software |
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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|
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/** |
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* @todo Use wp_hash_password() ? |
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* @todo Remember me |
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*/ |
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|
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define( 'PASSWORD_PROTECTED_SUBDIR', '/' . str_replace( basename( __FILE__ ), '', plugin_basename( __FILE__ ) ) ); |
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define( 'PASSWORD_PROTECTED_URL', plugins_url( PASSWORD_PROTECTED_SUBDIR ) ); |
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define( 'PASSWORD_PROTECTED_DIR', plugin_dir_path( __FILE__ ) ); |
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|
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global $Password_Protected; |
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$Password_Protected = new Password_Protected(); |
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|
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class Password_Protected { |
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|
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var $version = '1.7.1'; |
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var $admin = null; |
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var $errors = null; |
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|
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/** |
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* Constructor |
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*/ |
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function Password_Protected() { |
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$this->errors = new WP_Error(); |
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register_activation_hook( __FILE__, array( &$this, 'install' ) ); |
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add_action( 'plugins_loaded', array( $this, 'load_plugin_textdomain' ) ); |
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add_action( 'init', array( $this, 'maybe_process_login' ), 1 ); |
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add_action( 'wp', array( $this, 'disable_feeds' ) ); |
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add_action( 'template_redirect', array( $this, 'maybe_show_login' ), 1 ); |
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add_filter( 'pre_option_password_protected_status', array( $this, 'allow_feeds' ) ); |
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add_filter( 'pre_option_password_protected_status', array( $this, 'allow_administrators' ) ); |
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add_filter( 'pre_option_password_protected_status', array( $this, 'allow_users' ) ); |
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if ( is_admin() ) { |
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include_once( dirname( __FILE__ ) . '/admin/admin.php' ); |
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$this->admin = new Password_Protected_Admin(); |
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} |
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} |
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|
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/** |
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* I18n |
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*/ |
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function load_plugin_textdomain() { |
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load_plugin_textdomain( 'password-protected', false, basename( dirname( __FILE__ ) ) . '/languages' ); |
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} |
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|
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/** |
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* Is Active? |
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* |
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* @return boolean Is password protection active? |
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*/ |
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function is_active() { |
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|
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// Always allow access to robots.txt |
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if ( is_robots() ) |
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return false; |
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|
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if ( (bool) get_option( 'password_protected_status' ) ) { |
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if ( ! defined( 'DONOTCACHEPAGE' ) ) |
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define( 'DONOTCACHEPAGE', true ); |
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return true; |
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} |
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return false; |
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} |
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|
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/** |
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* Disable Feeds |
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* |
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* @todo An option/filter to prevent disabling of feeds. |
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*/ |
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function disable_feeds() { |
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if ( $this->is_active() ) { |
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add_action( 'do_feed', array( $this, 'disable_feed' ), 1 ); |
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add_action( 'do_feed_rdf', array( $this, 'disable_feed' ), 1 ); |
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add_action( 'do_feed_rss', array( $this, 'disable_feed' ), 1 ); |
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add_action( 'do_feed_rss2', array( $this, 'disable_feed' ), 1 ); |
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add_action( 'do_feed_atom', array( $this, 'disable_feed' ), 1 ); |
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} |
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} |
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|
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/** |
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* Disable Feed |
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* |
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* @todo Make Translatable |
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*/ |
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function disable_feed() { |
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wp_die( sprintf( __( 'Feeds are not available for this site. Please visit the <a href="%s">website</a>.', 'password-protected' ), get_bloginfo( 'url' ) ) ); |
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} |
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|
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/** |
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* Allow Feeds |
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* |
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* @param boolean $bool Allow feeds. |
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* @return boolean True/false. |
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*/ |
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function allow_feeds( $bool ) { |
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if ( is_feed() && (bool) get_option( 'password_protected_feeds' ) ) |
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return 0; |
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return $bool; |
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} |
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|
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/** |
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* Allow Administrators |
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* |
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* @param boolean $bool Allow administrators. |
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* @return boolean True/false. |
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*/ |
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function allow_administrators( $bool ) { |
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if ( ! is_admin() && current_user_can( 'manage_options' ) && (bool) get_option( 'password_protected_administrators' ) ) |
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return 0; |
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return $bool; |
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} |
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|
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/** |
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* Allow Users |
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* |
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* @param boolean $bool Allow administrators. |
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* @return boolean True/false. |
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*/ |
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function allow_users( $bool ) { |
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if ( ! is_admin() && current_user_can( 'manage_options' ) && (bool) get_option( 'password_protected_users' ) ) |
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return 0; |
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return $bool; |
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} |
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|
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/** |
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* Encrypt Password |
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* |
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* @param string $password Password. |
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* @return string Encrypted password. |
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*/ |
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function encrypt_password( $password ) { |
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return md5( $password ); |
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} |
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|
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/** |
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* Maybe Process Login |
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*/ |
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function maybe_process_login() { |
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if ( $this->is_active() && isset( $_REQUEST['password_protected_pwd'] ) ) { |
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$password_protected_pwd = $_REQUEST['password_protected_pwd']; |
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$pwd = get_option( 'password_protected_password' ); |
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// If correct password... |
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if ( ( $this->encrypt_password( $password_protected_pwd ) == $pwd && $pwd != '' ) || apply_filters( 'password_protected_process_login', false, $password_protected_pwd ) ) { |
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$this->set_auth_cookie(); |
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if ( ! empty( $_REQUEST['redirect_to'] ) ) { |
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$this->safe_redirect( $_REQUEST['redirect_to'] ); |
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exit; |
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} |
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} else { |
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// ... otherwise incorrect password |
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$this->clear_auth_cookie(); |
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$this->errors->add( 'incorrect_password', __( 'Incorrect Password', 'password-protected' ) ); |
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} |
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} |
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|
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// Log out |
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if ( isset( $_REQUEST['password-protected'] ) && $_REQUEST['password-protected'] == 'logout' ) { |
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$this->logout(); |
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if ( isset( $_REQUEST['redirect_to'] ) ) { |
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$redirect_to = esc_url_raw( $_REQUEST['redirect_to'], array( 'http', 'https' ) ); |
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wp_redirect( $redirect_to ); |
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exit(); |
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} |
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$redirect_to = remove_query_arg( array( 'password-protected', 'redirect_to' ), ( is_ssl() ? 'https://' : 'http://' ) . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'] ); |
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$query = array( |
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'password-protected' => 'login', |
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'redirect_to' => urlencode( $redirect_to ) |
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); |
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wp_redirect( add_query_arg( $query, home_url() ) ); |
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exit(); |
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} |
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} |
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|
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/** |
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* Maybe Show Login |
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*/ |
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function maybe_show_login() { |
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// Don't show login if not enabled |
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if ( ! $this->is_active() ) |
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return; |
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|
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// Logged in |
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if ( $this->validate_auth_cookie() ) |
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return; |
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|
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// Show login form |
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if ( isset( $_REQUEST['password-protected'] ) && 'login' == $_REQUEST['password-protected'] ) { |
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$default_theme_file = dirname( __FILE__ ) . '/theme/login.php'; |
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$theme_file = apply_filters( 'password_protected_theme_file', $default_theme_file ); |
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if ( ! file_exists( $theme_file ) ) { |
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$theme_file = $default_theme_file; |
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} |
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include( $theme_file ); |
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exit(); |
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} else { |
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$query = array( |
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'password-protected' => 'login', |
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'redirect_to' => urlencode( ( is_ssl() ? 'https://' : 'http://' ) . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'] ) |
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); |
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wp_redirect( add_query_arg( $query, home_url() ) ); |
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exit(); |
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} |
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} |
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|
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/** |
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* Get Site ID |
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* |
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* @return string Site ID. |
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*/ |
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function get_site_id() { |
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global $blog_id; |
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return 'bid_' . apply_filters( 'password_protected_blog_id', $blog_id ); |
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} |
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|
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/** |
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* Logout |
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*/ |
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function logout() { |
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$this->clear_auth_cookie(); |
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do_action( 'password_protected_logout' ); |
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} |
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|
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/** |
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* Validate Auth Cookie |
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* |
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* @param string $cookie Cookie string. |
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* @param string $scheme Cookie scheme. |
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* @return boolean Validation successful? |
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*/ |
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function validate_auth_cookie( $cookie = '', $scheme = '' ) { |
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if ( ! $cookie_elements = $this->parse_auth_cookie( $cookie, $scheme ) ) { |
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do_action( 'password_protected_auth_cookie_malformed', $cookie, $scheme ); |
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return false; |
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} |
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extract( $cookie_elements, EXTR_OVERWRITE ); |
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|
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$expired = $expiration; |
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|
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// Allow a grace period for POST and AJAX requests |
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if ( defined( 'DOING_AJAX' ) || 'POST' == $_SERVER['REQUEST_METHOD'] ) |
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$expired += 3600; |
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|
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// Quick check to see if an honest cookie has expired |
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if ( $expired < time() ) { |
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do_action('password_protected_auth_cookie_expired', $cookie_elements); |
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return false; |
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} |
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|
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$pass = md5( get_option( 'password_protected_password' ) ); |
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$pass_frag = substr( $pass, 8, 4 ); |
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|
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$key = md5( $this->get_site_id() . $pass_frag . '|' . $expiration ); |
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$hash = hash_hmac( 'md5', $this->get_site_id() . '|' . $expiration, $key); |
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|
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if ( $hmac != $hash ) { |
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do_action( 'password_protected_auth_cookie_bad_hash', $cookie_elements ); |
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return false; |
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} |
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|
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if ( $expiration < time() ) // AJAX/POST grace period set above |
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$GLOBALS['login_grace_period'] = 1; |
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|
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return true; |
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} |
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|
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/** |
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* Generate Auth Cookie |
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* |
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* @param int $expiration Expiration time in seconds. |
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* @param string $scheme Cookie scheme. |
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* @return string Cookie. |
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*/ |
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function generate_auth_cookie( $expiration, $scheme = 'auth' ) { |
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$pass = md5( get_option( 'password_protected_password' ) ); |
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$pass_frag = substr( $pass, 8, 4 ); |
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|
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$key = md5( $this->get_site_id() . $pass_frag . '|' . $expiration ); |
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$hash = hash_hmac( 'md5', $this->get_site_id() . '|' . $expiration, $key ); |
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$cookie = $this->get_site_id() . '|' . $expiration . '|' . $hash; |
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|
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return $cookie; |
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} |
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|
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/** |
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* Parse Auth Cookie |
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* |
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* @param string $cookie Cookie string. |
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* @param string $scheme Cookie scheme. |
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* @return string Cookie string. |
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*/ |
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function parse_auth_cookie( $cookie = '', $scheme = '' ) { |
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if ( empty( $cookie ) ) { |
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$cookie_name = $this->cookie_name(); |
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|
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if ( empty( $_COOKIE[$cookie_name] ) ) |
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return false; |
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$cookie = $_COOKIE[$cookie_name]; |
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} |
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|
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$cookie_elements = explode( '|', $cookie ); |
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if ( count( $cookie_elements ) != 3 ) |
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return false; |
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|
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list( $site_id, $expiration, $hmac ) = $cookie_elements; |
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|
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return compact( 'site_id', 'expiration', 'hmac', 'scheme' ); |
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} |
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|
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/** |
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* Set Auth Cookie |
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* |
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* @todo |
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* |
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* @param boolean $remember Remember logged in. |
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* @param string $secure Secure cookie. |
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*/ |
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function set_auth_cookie( $remember = false, $secure = '') { |
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if ( $remember ) { |
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$expiration = $expire = time() + apply_filters( 'password_protected_auth_cookie_expiration', 1209600, $remember ); |
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} else { |
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$expiration = time() + apply_filters( 'password_protected_auth_cookie_expiration', 172800, $remember ); |
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$expire = 0; |
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} |
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|
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if ( '' === $secure ) |
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$secure = is_ssl(); |
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|
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$secure_password_protected_cookie = apply_filters( 'password_protected_secure_password_protected_cookie', false, $secure ); |
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$password_protected_cookie = $this->generate_auth_cookie( $expiration, 'password_protected' ); |
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|
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setcookie( $this->cookie_name(), $password_protected_cookie, $expire, COOKIEPATH, COOKIE_DOMAIN, $secure_password_protected_cookie, true ); |
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if ( COOKIEPATH != SITECOOKIEPATH ) |
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setcookie( $this->cookie_name(), $password_protected_cookie, $expire, SITECOOKIEPATH, COOKIE_DOMAIN, $secure_password_protected_cookie, true ); |
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} |
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|
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/** |
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* Clear Auth Cookie |
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*/ |
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function clear_auth_cookie() { |
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setcookie( $this->cookie_name(), ' ', time() - 31536000, COOKIEPATH, COOKIE_DOMAIN ); |
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setcookie( $this->cookie_name(), ' ', time() - 31536000, SITECOOKIEPATH, COOKIE_DOMAIN ); |
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} |
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|
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/** |
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* Cookie Name |
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* |
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* @return string Cookie name. |
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*/ |
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function cookie_name() { |
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return $this->get_site_id() . '_password_protected_auth'; |
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} |
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|
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/** |
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* Install |
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*/ |
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function install() { |
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$old_version = get_option( 'password_protected_version' ); |
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|
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// 1.1 - Upgrade to MD5 |
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if ( empty( $old_version ) || version_compare( '1.1', $old_version ) ) { |
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$pwd = get_option( 'password_protected_password' ); |
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if ( ! empty( $pwd ) ) { |
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$new_pwd = $this->encrypt_password( $pwd ); |
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update_option( 'password_protected_password', $new_pwd ); |
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} |
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} |
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|
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update_option( 'password_protected_version', $this->version ); |
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} |
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|
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/** |
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* Safe Redirect |
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* |
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* Ensure the redirect is to the same site or pluggable list of allowed domains. |
| 404 |
* If invalid will redirect to ... |
| 405 |
* Based on the WordPress wp_safe_redirect() function. |
| 406 |
*/ |
| 407 |
function safe_redirect( $location, $status = 302 ) { |
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$location = wp_sanitize_redirect( $location ); |
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$location = wp_validate_redirect( $location, home_url() ); |
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wp_redirect( $location, $status ); |
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} |
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|
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} |
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|
