mirror of
https://github.com/WordPress/WordPress.git
synced 2024-11-02 16:59:35 +01:00
d2e690ac2d
props georgestephanis. see #20276. Built from https://develop.svn.wordpress.org/trunk@29222 git-svn-id: http://core.svn.wordpress.org/trunk@29006 1a063a9b-81f0-0310-95a4-ce76da25c4cd
380 lines
8.7 KiB
PHP
380 lines
8.7 KiB
PHP
<?php
|
|
/**
|
|
* Abstract class for managing user session tokens.
|
|
*
|
|
* @since 4.0.0
|
|
*/
|
|
abstract class WP_Session_Tokens {
|
|
|
|
/**
|
|
* User ID.
|
|
*
|
|
* @since 4.0.0
|
|
*
|
|
* @var int User ID.
|
|
*/
|
|
protected $user_id;
|
|
|
|
/**
|
|
* Protected constructor.
|
|
*
|
|
* @param int $user_id User whose session to manage.
|
|
*/
|
|
protected function __construct( $user_id ) {
|
|
$this->user_id = $user_id;
|
|
}
|
|
|
|
/**
|
|
* Get a session token manager instance for a user.
|
|
*
|
|
* This method contains a filter that allows a plugin to swap out
|
|
* the session manager for a subclass of WP_Session_Tokens.
|
|
*
|
|
* @since 4.0.0
|
|
*
|
|
* @param int $user_id User whose session to manage.
|
|
*/
|
|
final public static function get_instance( $user_id ) {
|
|
/**
|
|
* Filter the session token manager used.
|
|
*
|
|
* @since 4.0.0
|
|
*
|
|
* @param string $session Name of class to use as the manager.
|
|
* Default 'WP_User_Meta_Session_Tokens'.
|
|
*/
|
|
$manager = apply_filters( 'session_token_manager', 'WP_User_Meta_Session_Tokens' );
|
|
return new $manager( $user_id );
|
|
}
|
|
|
|
/**
|
|
* Hashes a token for storage.
|
|
*
|
|
* @since 4.0.0
|
|
*
|
|
* @param string $token Token to hash.
|
|
* @return string A hash of the token (a verifier).
|
|
*/
|
|
final private function hash_token( $token ) {
|
|
return hash( 'sha256', $token );
|
|
}
|
|
|
|
/**
|
|
* Validate a user's session token as authentic.
|
|
*
|
|
* Checks that the given token is present and hasn't expired.
|
|
*
|
|
* @since 4.0.0
|
|
*
|
|
* @param string $token Token to verify.
|
|
* @return bool Whether the token is valid for the user.
|
|
*/
|
|
final public function verify_token( $token ) {
|
|
$verifier = $this->hash_token( $token );
|
|
return (bool) $this->get_session( $verifier );
|
|
}
|
|
|
|
/**
|
|
* Generate a cookie session identification token.
|
|
*
|
|
* A session identification token is a long, random string. It is used to
|
|
* link a cookie to an expiration time and to ensure that cookies become
|
|
* invalidated upon logout. This function generates a token and stores it
|
|
* with the associated expiration time.
|
|
*
|
|
* @since 4.0.0
|
|
*
|
|
* @param int $expiration Session expiration timestamp.
|
|
* @return string Session identification token.
|
|
*/
|
|
final public function create_token( $expiration ) {
|
|
/**
|
|
* Filter the information attached to the newly created session.
|
|
*
|
|
* Could be used in the future to attach information such as
|
|
* IP address or user agent to a session.
|
|
*
|
|
* @since 4.0.0
|
|
*
|
|
* @param array $session Array of extra data.
|
|
* @param int $user_id User ID.
|
|
*/
|
|
$session = apply_filters( 'attach_session_information', array(), $this->user_id );
|
|
$session['expiration'] = $expiration;
|
|
|
|
$token = wp_generate_password( 43, false, false );
|
|
|
|
$this->update_token( $token, $session );
|
|
|
|
return $token;
|
|
}
|
|
|
|
/**
|
|
* Updates a session based on its token.
|
|
*
|
|
* @since 4.0.0
|
|
*
|
|
* @param string $token Token to update.
|
|
* @param array $session Session information.
|
|
*/
|
|
final public function update_token( $token, $session ) {
|
|
$verifier = $this->hash_token( $token );
|
|
$this->update_session( $verifier, $session );
|
|
}
|
|
|
|
/**
|
|
* Destroy a session token.
|
|
*
|
|
* @since 4.0.0
|
|
*
|
|
* @param string $token Token to destroy.
|
|
*/
|
|
final public function destroy_token( $token ) {
|
|
$verifier = $this->hash_token( $token );
|
|
$this->update_session( $verifier, null );
|
|
}
|
|
|
|
/**
|
|
* Destroy all session tokens for this user,
|
|
* except a single token, presumably the one in use.
|
|
*
|
|
* @since 4.0.0
|
|
*
|
|
* @param string $token_to_keep Token to keep.
|
|
*/
|
|
final public function destroy_other_tokens( $token_to_keep ) {
|
|
$verifier = $this->hash_token( $token_to_keep );
|
|
$session = $this->get_session( $verifier );
|
|
if ( $session ) {
|
|
$this->destroy_other_sessions( $verifier );
|
|
} else {
|
|
$this->destroy_all_tokens();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Determine whether a session token is still valid,
|
|
* based on expiration.
|
|
*
|
|
* @since 4.0.0
|
|
*
|
|
* @param array $session Session to check.
|
|
* @return bool Whether session is valid.
|
|
*/
|
|
final protected function is_still_valid( $session ) {
|
|
return $session['expiration'] >= time();
|
|
}
|
|
|
|
/**
|
|
* Destroy all tokens for a user.
|
|
*
|
|
* @since 4.0.0
|
|
*/
|
|
final public function destroy_all_tokens() {
|
|
$this->destroy_all_sessions();
|
|
}
|
|
|
|
/**
|
|
* Destroy all tokens for all users.
|
|
*
|
|
* @since 4.0.0
|
|
*/
|
|
final public static function destroy_all_tokens_for_all_users() {
|
|
$manager = apply_filters( 'session_token_manager', 'WP_User_Meta_Session_Tokens' );
|
|
call_user_func( array( $manager, 'drop_sessions' ) );
|
|
}
|
|
|
|
/**
|
|
* Retrieve all sessions of a user.
|
|
*
|
|
* @since 4.0.0
|
|
*
|
|
* @return array Sessions of a user.
|
|
*/
|
|
final public function get_all_sessions() {
|
|
return array_values( $this->get_sessions() );
|
|
}
|
|
|
|
/**
|
|
* This method should retrieve all sessions of a user, keyed by verifier.
|
|
*
|
|
* @since 4.0.0
|
|
*
|
|
* @return array Sessions of a user, keyed by verifier.
|
|
*/
|
|
abstract protected function get_sessions();
|
|
|
|
/**
|
|
* This method should look up a session by its verifier (token hash).
|
|
*
|
|
* @since 4.0.0
|
|
*
|
|
* @param $verifier Verifier of the session to retrieve.
|
|
* @return array|null The session, or null if it does not exist.
|
|
*/
|
|
abstract protected function get_session( $verifier );
|
|
|
|
/**
|
|
* This method should update a session by its verifier.
|
|
*
|
|
* Omitting the second argument should destroy the session.
|
|
*
|
|
* @since 4.0.0
|
|
*
|
|
* @param $verifier Verifier of the session to update.
|
|
*/
|
|
abstract protected function update_session( $verifier, $session = null );
|
|
|
|
/**
|
|
* This method should destroy all session tokens for this user,
|
|
* except a single session passed.
|
|
*
|
|
* @since 4.0.0
|
|
*
|
|
* @param $verifier Verifier of the session to keep.
|
|
*/
|
|
abstract protected function destroy_other_sessions( $verifier );
|
|
|
|
/**
|
|
* This method should destroy all sessions for a user.
|
|
*
|
|
* @since 4.0.0
|
|
*/
|
|
abstract protected function destroy_all_sessions();
|
|
|
|
/**
|
|
* This static method should destroy all session tokens for all users.
|
|
*
|
|
* @since 4.0.0
|
|
*/
|
|
abstract public static function drop_sessions();
|
|
}
|
|
|
|
/**
|
|
* Meta-based user sessions token manager.
|
|
*
|
|
* @since 4.0.0
|
|
*/
|
|
class WP_User_Meta_Session_Tokens extends WP_Session_Tokens {
|
|
|
|
/**
|
|
* Get all sessions of a user.
|
|
*
|
|
* @since 4.0.0
|
|
*
|
|
* @return array Sessions of a user.
|
|
*/
|
|
protected function get_sessions() {
|
|
$sessions = get_user_meta( $this->user_id, 'session_tokens', true );
|
|
|
|
if ( ! is_array( $sessions ) ) {
|
|
return array();
|
|
}
|
|
|
|
$sessions = array_map( array( $this, 'prepare_session' ), $sessions );
|
|
return array_filter( $sessions, array( $this, 'is_still_valid' ) );
|
|
}
|
|
|
|
/**
|
|
* Converts an expiration to an array of session information.
|
|
*
|
|
* @param mixed $session Session or expiration.
|
|
* @return array Session.
|
|
*/
|
|
protected function prepare_session( $session ) {
|
|
if ( is_int( $session ) ) {
|
|
return array( 'expiration' => $session );
|
|
}
|
|
|
|
return $session;
|
|
}
|
|
|
|
/**
|
|
* Retrieve a session by its verifier (token hash).
|
|
*
|
|
* @since 4.0.0
|
|
*
|
|
* @param $verifier Verifier of the session to retrieve.
|
|
* @return array|null The session, or null if it does not exist
|
|
*/
|
|
protected function get_session( $verifier ) {
|
|
$sessions = $this->get_sessions();
|
|
|
|
if ( isset( $sessions[ $verifier ] ) ) {
|
|
return $sessions[ $verifier ];
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* Update a session by its verifier.
|
|
*
|
|
* Omitting the second argument destroys the session.
|
|
*
|
|
* @since 4.0.0
|
|
*
|
|
* @param $verifier Verifier of the session to update.
|
|
*/
|
|
protected function update_session( $verifier, $session = null ) {
|
|
$sessions = $this->get_sessions();
|
|
|
|
if ( $session ) {
|
|
$sessions[ $verifier ] = $session;
|
|
} else {
|
|
unset( $sessions[ $verifier ] );
|
|
}
|
|
|
|
$this->update_sessions( $sessions );
|
|
}
|
|
|
|
/**
|
|
* Update a user's sessions in the usermeta table.
|
|
*
|
|
* @since 4.0.0
|
|
*
|
|
* @param array $sessions
|
|
*/
|
|
protected function update_sessions( $sessions ) {
|
|
if ( ! has_filter( 'attach_session_information' ) ) {
|
|
$sessions = wp_list_pluck( $sessions, 'expiration' );
|
|
}
|
|
|
|
if ( $sessions ) {
|
|
update_user_meta( $this->user_id, 'session_tokens', $sessions );
|
|
} else {
|
|
delete_user_meta( $this->user_id, 'session_tokens' );
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Destroy all session tokens for a user, except a single session passed.
|
|
*
|
|
* @since 4.0.0
|
|
*
|
|
* @param $verifier Verifier of the session to keep.
|
|
*/
|
|
protected function destroy_other_sessions( $verifier ) {
|
|
$session = $this->get_session( $verifier );
|
|
$this->update_sessions( array( $verifier => $session ) );
|
|
}
|
|
|
|
/**
|
|
* Destroy all session tokens for a user.
|
|
*
|
|
* @since 4.0.0
|
|
*/
|
|
protected function destroy_all_sessions() {
|
|
$this->update_sessions( array() );
|
|
}
|
|
|
|
/**
|
|
* Destroy all session tokens for all users.
|
|
*
|
|
* @since 4.0.0
|
|
*/
|
|
public static function drop_sessions() {
|
|
delete_metadata( 'user', false, 'session_tokens', false, true );
|
|
}
|
|
}
|