Automattic / jetpack

		);

		@list( $token_key, $version, $user_id ) = explode( ':', $_GET['token'] );

		if (

			empty( $token_key )

		||

			empty( $version ) || strval( JETPACK__API_VERSION ) !== $version

		) {

			$this->xmlrpc_verification = new WP_Error( 'malformed_token', 'Malformed token in request', compact( 'signature_details' ) );

			return $this->xmlrpc_verification;

		}

		if ( '0' === $user_id ) {

			$token_type = 'blog';

			$user_id = 0;

		} else {

			$token_type = 'user';

			if ( empty( $user_id ) || ! ctype_digit( $user_id ) ) {

				$this->xmlrpc_verification = new WP_Error( 'malformed_user_id', 'Malformed user_id in request', compact( 'signature_details' ) );

				return $this->xmlrpc_verification;

			}

			$user_id = (int) $user_id;

			$user = new WP_User( $user_id );