?<h3>D¨ızenle: class-wp-recovery-mode-cookie-service.php</h3>
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/**
 * Error Protection API: WP_Recovery_Mode_Cookie_Service class
 *
 * @package WordPress
 * @since 5.2.0
 */

/**
 * Core class used to set, validate, and clear cookies that identify a Recovery Mode session.
 *
 * @since 5.2.0
 */
#[AllowDynamicProperties]
final class WP_Recovery_Mode_Cookie_Service {

	/**
	 * Checks whether the recovery mode cookie is set.
	 *
	 * @since 5.2.0
	 *
	 * @return bool True if the cookie is set, false otherwise.
	 */
	public function is_cookie_set() {
		return ! empty( $_COOKIE[ RECOVERY_MODE_COOKIE ] );
	}

	/**
	 * Sets the recovery mode cookie.
	 *
	 * This must be immediately followed by exiting the request.
	 *
	 * @since 5.2.0
	 */
	public function set_cookie() {

		$value = $this-&gt;generate_cookie();

		/**
		 * Filters the length of time a Recovery Mode cookie is valid for.
		 *
		 * @since 5.2.0
		 *
		 * @param int $length Length in seconds.
		 */
		$length = apply_filters( &#039;recovery_mode_cookie_length&#039;, WEEK_IN_SECONDS );

		$expire = time() + $length;

		setcookie( RECOVERY_MODE_COOKIE, $value, $expire, COOKIEPATH, COOKIE_DOMAIN, is_ssl(), true );

		if ( COOKIEPATH !== SITECOOKIEPATH ) {
			setcookie( RECOVERY_MODE_COOKIE, $value, $expire, SITECOOKIEPATH, COOKIE_DOMAIN, is_ssl(), true );
		}
	}

	/**
	 * Clears the recovery mode cookie.
	 *
	 * @since 5.2.0
	 */
	public function clear_cookie() {
		setcookie( RECOVERY_MODE_COOKIE, &#039; &#039;, time() - YEAR_IN_SECONDS, COOKIEPATH, COOKIE_DOMAIN );
		setcookie( RECOVERY_MODE_COOKIE, &#039; &#039;, time() - YEAR_IN_SECONDS, SITECOOKIEPATH, COOKIE_DOMAIN );
	}

	/**
	 * Validates the recovery mode cookie.
	 *
	 * @since 5.2.0
	 *
	 * @param string $cookie Optionally specify the cookie string.
	 *                       If omitted, it will be retrieved from the super global.
	 * @return true|WP_Error True on success, error object on failure.
	 */
	public function validate_cookie( $cookie = &#039;&#039; ) {

		if ( ! $cookie ) {
			if ( empty( $_COOKIE[ RECOVERY_MODE_COOKIE ] ) ) {
				return new WP_Error( &#039;no_cookie&#039;, __( &#039;No cookie present.&#039; ) );
			}

			$cookie = $_COOKIE[ RECOVERY_MODE_COOKIE ];
		}

		$parts = $this-&gt;parse_cookie( $cookie );

		if ( is_wp_error( $parts ) ) {
			return $parts;
		}

		list( , $created_at, $random, $signature ) = $parts;

		if ( ! ctype_digit( $created_at ) ) {
			return new WP_Error( &#039;invalid_created_at&#039;, __( &#039;Invalid cookie format.&#039; ) );
		}

		/** This filter is documented in wp-includes/class-wp-recovery-mode-cookie-service.php */
		$length = apply_filters( &#039;recovery_mode_cookie_length&#039;, WEEK_IN_SECONDS );

		if ( time() &gt; $created_at + $length ) {
			return new WP_Error( &#039;expired&#039;, __( &#039;Cookie expired.&#039; ) );
		}

		$to_sign = sprintf( &#039;recovery_mode|%s|%s&#039;, $created_at, $random );
		$hashed  = $this-&gt;recovery_mode_hash( $to_sign );

		if ( ! hash_equals( $signature, $hashed ) ) {
			return new WP_Error( &#039;signature_mismatch&#039;, __( &#039;Invalid cookie.&#039; ) );
		}

		return true;
	}

	/**
	 * Gets the session identifier from the cookie.
	 *
	 * The cookie should be validated before calling this API.
	 *
	 * @since 5.2.0
	 *
	 * @param string $cookie Optionally specify the cookie string.
	 *                       If omitted, it will be retrieved from the super global.
	 * @return string|WP_Error Session ID on success, or error object on failure.
	 */
	public function get_session_id_from_cookie( $cookie = &#039;&#039; ) {
		if ( ! $cookie ) {
			if ( empty( $_COOKIE[ RECOVERY_MODE_COOKIE ] ) ) {
				return new WP_Error( &#039;no_cookie&#039;, __( &#039;No cookie present.&#039; ) );
			}

			$cookie = $_COOKIE[ RECOVERY_MODE_COOKIE ];
		}

		$parts = $this-&gt;parse_cookie( $cookie );
		if ( is_wp_error( $parts ) ) {
			return $parts;
		}

		list( , , $random ) = $parts;

		return sha1( $random );
	}

	/**
	 * Parses the cookie into its four parts.
	 *
	 * @since 5.2.0
	 *
	 * @param string $cookie Cookie content.
	 * @return array|WP_Error Cookie parts array, or error object on failure.
	 */
	private function parse_cookie( $cookie ) {
		$cookie = base64_decode( $cookie );
		$parts  = explode( &#039;|&#039;, $cookie );

		if ( 4 !== count( $parts ) ) {
			return new WP_Error( &#039;invalid_format&#039;, __( &#039;Invalid cookie format.&#039; ) );
		}

		return $parts;
	}

	/**
	 * Generates the recovery mode cookie value.
	 *
	 * The cookie is a base64 encoded string with the following format:
	 *
	 * recovery_mode|iat|rand|signature
	 *
	 * Where &quot;recovery_mode&quot; is a constant string,
	 * iat is the time the cookie was generated at,
	 * rand is a randomly generated password that is also used as a session identifier
	 * and signature is an hmac of the preceding 3 parts.
	 *
	 * @since 5.2.0
	 *
	 * @return string Generated cookie content.
	 */
	private function generate_cookie() {
		$to_sign = sprintf( &#039;recovery_mode|%s|%s&#039;, time(), wp_generate_password( 20, false ) );
		$signed  = $this-&gt;recovery_mode_hash( $to_sign );

		return base64_encode( sprintf( &#039;%s|%s&#039;, $to_sign, $signed ) );
	}

	/**
	 * Gets a form of `wp_hash()` specific to Recovery Mode.
	 *
	 * We cannot use `wp_hash()` because it is defined in `pluggable.php` which is not loaded until after plugins are loaded,
	 * which is too late to verify the recovery mode cookie.
	 *
	 * This tries to use the `AUTH` salts first, but if they aren&#039;t valid specific salts will be generated and stored.
	 *
	 * @since 5.2.0
	 *
	 * @param string $data Data to hash.
	 * @return string|false The hashed $data, or false on failure.
	 */
	private function recovery_mode_hash( $data ) {
		$default_keys = array_unique(
			array(
				&#039;put your unique phrase here&#039;,
				/*
				 * translators: This string should only be translated if wp-config-sample.php is localized.
				 * You can check the localized release package or
				 * https://i18n.svn.wordpress.org/&lt;locale code&gt;/branches/&lt;wp version&gt;/dist/wp-config-sample.php
				 */
				__( &#039;put your unique phrase here&#039; ),
			)
		);

		if ( ! defined( &#039;AUTH_KEY&#039; ) || in_array( AUTH_KEY, $default_keys, true ) ) {
			$auth_key = get_site_option( &#039;recovery_mode_auth_key&#039; );

			if ( ! $auth_key ) {
				if ( ! function_exists( &#039;wp_generate_password&#039; ) ) {
					require_once ABSPATH . WPINC . &#039;/pluggable.php&#039;;
				}

				$auth_key = wp_generate_password( 64, true, true );
				update_site_option( &#039;recovery_mode_auth_key&#039;, $auth_key );
			}
		} else {
			$auth_key = AUTH_KEY;
		}

		if ( ! defined( &#039;AUTH_SALT&#039; ) || in_array( AUTH_SALT, $default_keys, true ) || AUTH_SALT === $auth_key ) {
			$auth_salt = get_site_option( &#039;recovery_mode_auth_salt&#039; );

			if ( ! $auth_salt ) {
				if ( ! function_exists( &#039;wp_generate_password&#039; ) ) {
					require_once ABSPATH . WPINC . &#039;/pluggable.php&#039;;
				}

				$auth_salt = wp_generate_password( 64, true, true );
				update_site_option( &#039;recovery_mode_auth_salt&#039;, $auth_salt );
			}
		} else {
			$auth_salt = AUTH_SALT;
		}

		$secret = $auth_key . $auth_salt;

		return hash_hmac( &#039;sha1&#039;, $data, $secret );
	}
}
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