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<?php |
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/** |
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* Shared random WordPress-origin identity. |
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* |
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* @package signls-sdk |
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* @license GPL-3.0-or-later |
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*/ |
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|
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namespace Signls\Sdk\V1; |
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|
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defined( 'ABSPATH' ) || exit; |
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|
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final class SiteIdentity { |
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|
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private const ID_OPTION = 'signls_sdk_site_id'; |
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|
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private const ORIGIN_OPTION = 'signls_sdk_site_origin'; |
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|
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public function site_id(): string { |
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$current_origin = $this->origin_fingerprint(); |
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$stored_origin_candidate = get_option( self::ORIGIN_OPTION, '' ); |
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$site_id_candidate = get_option( self::ID_OPTION, '' ); |
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$stored_origin = is_scalar( $stored_origin_candidate ) ? (string) $stored_origin_candidate : ''; |
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$site_id = is_scalar( $site_id_candidate ) ? (string) $site_id_candidate : ''; |
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|
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if ( ! self::valid( $site_id ) || ( '' !== $stored_origin && ! hash_equals( $stored_origin, $current_origin ) ) ) { |
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$site_id = bin2hex( random_bytes( 16 ) ); |
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self::replace_option( self::ID_OPTION, $site_id ); |
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self::replace_option( self::ORIGIN_OPTION, $current_origin ); |
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} elseif ( '' === $stored_origin ) { |
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self::replace_option( self::ORIGIN_OPTION, $current_origin ); |
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} |
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|
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return $site_id; |
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} |
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|
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private function origin_fingerprint(): string { |
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$origin = function_exists( 'home_url' ) ? (string) home_url( '/' ) : 'http://local/'; |
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$parts = wp_parse_url( $origin ); |
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$parts = is_array( $parts ) ? $parts : array(); |
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$scheme = isset( $parts['scheme'] ) ? strtolower( (string) $parts['scheme'] ) : 'http'; |
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$host = isset( $parts['host'] ) ? strtolower( rtrim( (string) $parts['host'], '.' ) ) : 'local'; |
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$port = isset( $parts['port'] ) ? (int) $parts['port'] : ( 'https' === $scheme ? 443 : 80 ); |
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$path = isset( $parts['path'] ) ? '/' . trim( (string) $parts['path'], '/' ) : '/'; |
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$path = '/' === $path ? $path : $path . '/'; |
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$salt = function_exists( 'wp_salt' ) ? (string) wp_salt( 'auth' ) : 'signls-test-salt'; |
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return hash_hmac( 'sha256', $scheme . '://' . $host . ':' . $port . $path, $salt ); |
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} |
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|
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private static function replace_option( string $name, string $value ): bool { |
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if ( false === get_option( $name, false ) ) { |
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return add_option( $name, $value, '', false ); |
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} |
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return update_option( $name, $value, false ); |
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} |
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|
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private static function valid( string $value ): bool { |
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return 1 === preg_match( '/^[a-f0-9]{32}$/', $value ); |
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} |
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} |
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