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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 */ #[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 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 ); } }
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