Exemplo n.º 1
0
// InitLabels returns the process label and file labels to be used within
// the container.  A list of options can be passed into this function to alter
// the labels.  The labels returned will include a random MCS String, that is
// guaranteed to be unique.
func InitLabels(options []string) (string, string, error) {
	if !selinux.SelinuxEnabled() {
		return "", "", nil
	}
	processLabel, mountLabel, err := selinux.GetLxcContexts()
	if err != nil {
		return "", "", err
	}
	if processLabel != "" {
		pcon := selinux.NewContext(processLabel)
		mcon := selinux.NewContext(mountLabel)
		for _, opt := range options {
			if opt == "disable" {
				return "", "", nil
			}
			if i := strings.Index(opt, ":"); i == -1 {
				return "", "", errors.New("bad SELinux option")
			}
			con := strings.SplitN(opt, ":", 2)
			pcon[con[0]] = con[1]
			if con[0] == "level" || con[0] == "user" {
				mcon[con[0]] = con[1]
			}
			if con[0] == "mcsdir" {
				err := selinux.SetMCSDir(con[1])
				if err != nil {
					return "", "", errwrap.Wrap(errors.New("unable to configure MCS storage directory"), err)
				}
			}
		}
		processLabel = pcon.Get()
		mountLabel = mcon.Get()
	}
	return processLabel, mountLabel, nil
}
Exemplo n.º 2
0
// InitLabels returns the process label and file labels to be used within
// the container.  A list of options can be passed into this function to alter
// the labels.  The labels returned will include a random MCS String, that is
// guaranteed to be unique.
func InitLabels(options []string) (string, string, error) {
	if !selinux.SelinuxEnabled() {
		return "", "", nil
	}
	processLabel, mountLabel := selinux.GetLxcContexts()
	if processLabel != "" {
		pcon := selinux.NewContext(processLabel)
		mcon := selinux.NewContext(mountLabel)
		for _, opt := range options {
			if opt == "disable" {
				return "", "", nil
			}
			if i := strings.Index(opt, ":"); i == -1 {
				return "", "", fmt.Errorf("Bad SELinux Option")
			}
			con := strings.SplitN(opt, ":", 2)
			pcon[con[0]] = con[1]
			if con[0] == "level" || con[0] == "user" {
				mcon[con[0]] = con[1]
			}
		}
		processLabel = pcon.Get()
		mountLabel = mcon.Get()
	}
	return processLabel, mountLabel, nil
}
Exemplo n.º 3
0
// Change the label of path to the filelabel string.  If the relabel string
// is "z", relabel will change the MCS label to s0.  This will allow all
// containers to share the content.  If the relabel string is a "Z" then
// the MCS label should continue to be used.  SELinux will use this field
// to make sure the content can not be shared by other containers.
func Relabel(path string, fileLabel string, relabel string) error {
	exclude_path := []string{"/", "/usr", "/etc"}
	if fileLabel == "" {
		return nil
	}
	if !strings.ContainsAny(relabel, "zZ") {
		return nil
	}
	for _, p := range exclude_path {
		if path == p {
			return fmt.Errorf("relabeling of %s is not allowed", path)
		}
	}
	if strings.Contains(relabel, "z") && strings.Contains(relabel, "Z") {
		return fmt.Errorf("bad SELinux option z and Z can not be used together")
	}
	if strings.Contains(relabel, "z") {
		c := selinux.NewContext(fileLabel)
		c["level"] = "s0"
		fileLabel = c.Get()
	}
	return selinux.Chcon(path, fileLabel, true)
}