WordPress/wp-includes/class-wp-recovery-mode-key-service.php

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<?php
/**
* Error Protection API: WP_Recovery_Mode_Key_Service class
*
* @package WordPress
* @since 5.2.0
*/
/**
* Core class used to generate and validate keys used to enter Recovery Mode.
*
* @since 5.2.0
*/
Code Modernization: Add `AllowDynamicProperties` attribute to all (parent) classes. Dynamic (non-explicitly declared) properties are deprecated as of PHP 8.2 and are expected to become a fatal error in PHP 9.0. There are a number of ways to mitigate this: * If it is an accidental typo for a declared property: fix the typo. * For known properties: declare them on the class. * For unknown properties: add the magic `__get()`, `__set()`, et al. methods to the class or let the class extend `stdClass` which has highly optimized versions of these magic methods built in. * For unknown ''use'' of dynamic properties, the `#[AllowDynamicProperties]` attribute can be added to the class. The attribute will automatically be inherited by child classes. Trac ticket #56034 is open to investigate and handle the third and fourth type of situations, however it has become clear this will need more time and will not be ready in time for WP 6.1. To reduce “noise” in the meantime, both in the error logs of WP users moving onto PHP 8.2, in the test run logs of WP itself, in test runs of plugins and themes, as well as to prevent duplicate tickets from being opened for the same issue, this commit adds the `#[AllowDynamicProperties]` attribute to all “parent” classes in WP. The logic used for this commit is as follows: * If a class already has the attribute: no action needed. * If a class does not `extend`: add the attribute. * If a class does `extend`: - If it extends `stdClass`: no action needed (as `stdClass` supports dynamic properties). - If it extends a PHP native class: add the attribute. - If it extends a class from one of WP's external dependencies: add the attribute. * In all other cases: no action — the attribute should not be needed as child classes inherit from the parent. Whether or not a class contains magic methods has not been taken into account, as a review of the currently existing magic methods has shown that those are generally not sturdy enough and often even set dynamic properties (which they should not). See the [https://www.youtube.com/watch?v=vDZWepDQQVE live stream from August 16, 2022] for more details. This commit only affects classes in the `src` directory of WordPress core. * Tests should not get this attribute, but should be fixed to not use dynamic properties instead. Patches for this are already being committed under ticket #56033. * While a number bundled themes (2014, 2019, 2020, 2021) contain classes, they are not a part of this commit and may be updated separately. Reference: [https://wiki.php.net/rfc/deprecate_dynamic_properties PHP RFC: Deprecate dynamic properties]. Follow-up to [53922]. Props jrf, hellofromTonya, markjaquith, peterwilsoncc, costdev, knutsp, aristath. See #56513, #56034. Built from https://develop.svn.wordpress.org/trunk@54133 git-svn-id: http://core.svn.wordpress.org/trunk@53692 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2022-09-12 17:47:14 +02:00
#[AllowDynamicProperties]
final class WP_Recovery_Mode_Key_Service {
/**
* The option name used to store the keys.
*
* @since 5.2.0
* @var string
*/
private $option_name = 'recovery_keys';
/**
* Creates a recovery mode token.
*
* @since 5.2.0
*
* @return string A random string to identify its associated key in storage.
*/
public function generate_recovery_mode_token() {
return wp_generate_password( 22, false );
}
/**
* Creates a recovery mode key.
*
* @since 5.2.0
*
* @global PasswordHash $wp_hasher
*
* @param string $token A token generated by {@see generate_recovery_mode_token()}.
* @return string Recovery mode key.
*/
public function generate_and_store_recovery_mode_key( $token ) {
global $wp_hasher;
$key = wp_generate_password( 22, false );
if ( empty( $wp_hasher ) ) {
require_once ABSPATH . WPINC . '/class-phpass.php';
$wp_hasher = new PasswordHash( 8, true );
}
$hashed = $wp_hasher->HashPassword( $key );
$records = $this->get_keys();
$records[ $token ] = array(
'hashed_key' => $hashed,
'created_at' => time(),
);
$this->update_keys( $records );
/**
* Fires when a recovery mode key is generated.
*
* @since 5.2.0
*
* @param string $token The recovery data token.
* @param string $key The recovery mode key.
*/
do_action( 'generate_recovery_mode_key', $token, $key );
return $key;
}
/**
* Verifies if the recovery mode key is correct.
*
* Recovery mode keys can only be used once; the key will be consumed in the process.
*
* @since 5.2.0
*
* @param string $token The token used when generating the given key.
* @param string $key The unhashed key.
* @param int $ttl Time in seconds for the key to be valid for.
* @return true|WP_Error True on success, error object on failure.
*/
public function validate_recovery_mode_key( $token, $key, $ttl ) {
$records = $this->get_keys();
if ( ! isset( $records[ $token ] ) ) {
return new WP_Error( 'token_not_found', __( 'Recovery Mode not initialized.' ) );
}
$record = $records[ $token ];
$this->remove_key( $token );
if ( ! is_array( $record ) || ! isset( $record['hashed_key'], $record['created_at'] ) ) {
return new WP_Error( 'invalid_recovery_key_format', __( 'Invalid recovery key format.' ) );
}
if ( ! wp_check_password( $key, $record['hashed_key'] ) ) {
return new WP_Error( 'hash_mismatch', __( 'Invalid recovery key.' ) );
}
if ( time() > $record['created_at'] + $ttl ) {
return new WP_Error( 'key_expired', __( 'Recovery key expired.' ) );
}
return true;
}
/**
* Removes expired recovery mode keys.
*
* @since 5.2.0
*
* @param int $ttl Time in seconds for the keys to be valid for.
*/
public function clean_expired_keys( $ttl ) {
$records = $this->get_keys();
foreach ( $records as $key => $record ) {
if ( ! isset( $record['created_at'] ) || time() > $record['created_at'] + $ttl ) {
unset( $records[ $key ] );
}
}
$this->update_keys( $records );
}
/**
* Removes a used recovery key.
*
* @since 5.2.0
*
* @param string $token The token used when generating a recovery mode key.
*/
private function remove_key( $token ) {
$records = $this->get_keys();
if ( ! isset( $records[ $token ] ) ) {
return;
}
unset( $records[ $token ] );
$this->update_keys( $records );
}
/**
* Gets the recovery key records.
*
* @since 5.2.0
*
* @return array Associative array of $token => $data pairs, where $data has keys 'hashed_key'
* and 'created_at'.
*/
private function get_keys() {
return (array) get_option( $this->option_name, array() );
}
/**
* Updates the recovery key records.
*
* @since 5.2.0
*
* @param array $keys Associative array of $token => $data pairs, where $data has keys 'hashed_key'
* and 'created_at'.
* @return bool True on success, false on failure.
*/
private function update_keys( array $keys ) {
return update_option( $this->option_name, $keys );
}
}