As the sun rises and the forest mist clears, and the clouds return and the caves darken, these changes of light and shadow are the morning and evening in the mountains. Wildflowers bloom with their subtle fragrance, fine trees flourish with their dense shade, the wind and frost are pure and clean, and the water recedes to reveal the rocks—these are the four seasons in the mountains. Going out in the morning and returning in the evening, the scenery of the four seasons is different, and the joy is endless.至于负者歌于途,行者休于树,前者呼,后者应,伛偻提携,往来而不绝者,滁人游也。临溪而渔,溪深而鱼肥,酿泉为酒,泉香而酒洌,山肴野蔌,杂然而前陈者,太守宴也。宴酣之乐,非丝非竹,射者中,弈者胜,觥筹交错,起坐而喧哗者,众宾欢也。苍颜白发,颓然乎其间者,太守醉也。
<?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
*/
#[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
* @since 6.8.0 The stored key is now hashed using wp_fast_hash() instead of phpass.
*
* @param string $token A token generated by {@see WP_Recovery_Mode_Key_Service::generate_recovery_mode_token()}.
* @return string Recovery mode key.
*/
public function generate_and_store_recovery_mode_key( $token ) {
$key = wp_generate_password( 22, false );
$records = $this->get_keys();
$records[ $token ] = array(
'hashed_key' => wp_fast_hash( $key ),
'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 plain text 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_verify_fast_hash( $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
* @since 6.8.0 Each key is now hashed using wp_fast_hash() instead of phpass.
* Existing keys may still be hashed using phpass.
*
* @return array {
* Associative array of token => data pairs, where the data is an associative
* array of information about the key.
*
* @type array ...$0 {
* Information about the key.
*
* @type string $hashed_key The hashed value of the key.
* @type int $created_at The timestamp when the key was created.
* }
* }
*/
private function get_keys() {
return (array) get_option( $this->option_name, array() );
}
/**
* Updates the recovery key records.
*
* @since 5.2.0
* @since 6.8.0 Each key should now be hashed using wp_fast_hash() instead of phpass.
*
* @param array $keys {
* Associative array of token => data pairs, where the data is an associative
* array of information about the key.
*
* @type array ...$0 {
* Information about the key.
*
* @type string $hashed_key The hashed value of the key.
* @type int $created_at The timestamp when the key was created.
* }
* }
* @return bool True on success, false on failure.
*/
private function update_keys( array $keys ) {
return update_option( $this->option_name, $keys, false );
}
}