set_owner.go

package main

import (
	"fmt"
	"log"
	"os"
	"strings"

	"github.com/Microsoft/go-winio"
	"golang.org/x/sys/windows"
)

const (
	seTakeOwnershipPrivilege = "SeTakeOwnershipPrivilege"
)

func main() {
	if len(os.Args) != 3 {
		fmt.Println("Usage: set_owner_windows.exe file_or_directory SID|USERNAME")
		os.Exit(1)
	}

	if _, err := os.Stat(os.Args[1]); err != nil {
		log.Fatal(err)
	}
	privileges := []string{winio.SeRestorePrivilege, seTakeOwnershipPrivilege}
	if err := winio.EnableProcessPrivileges(privileges); err != nil {
		fmt.Println(err)
		os.Exit(3)
	}
	defer winio.DisableProcessPrivileges(privileges)

	var sid *windows.SID
	var err error
	sidString := os.Args[2]
	if len(sidString) >= 2 && !strings.EqualFold(string(sidString[:2]), "s-") {
		sid, _, _, err = windows.LookupSID("", sidString)
		if err != nil {
			fmt.Println(err)
			os.Exit(3)
		}
	} else {
		sidPtr, err := windows.UTF16PtrFromString(sidString)
		if err != nil {
			fmt.Println(err)
			os.Exit(3)
		}
		if err := windows.ConvertStringSidToSid(sidPtr, &sid); err != nil {
			fmt.Println(err)
			os.Exit(3)
		}
	}

	if err := windows.SetNamedSecurityInfo(
		os.Args[1], windows.SE_FILE_OBJECT,
		windows.OWNER_SECURITY_INFORMATION,
		sid, nil, nil, nil); err != nil {

		fmt.Println(err)
		os.Exit(3)
	}
	os.Exit(0)
}