// 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
}
// 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
}
func testSetfilecon(t *testing.T) {
if selinux.SelinuxEnabled() {
tmp := "selinux_test"
out, _ := os.OpenFile(tmp, os.O_WRONLY, 0)
out.Close()
err := selinux.Setfilecon(tmp, "system_u:object_r:bin_t:s0")
if err != nil {
t.Log("Setfilecon failed")
t.Fatal(err)
}
os.Remove(tmp)
}
}
func TestSELinux(t *testing.T) {
var (
err error
plabel, flabel string
)
if selinux.SelinuxEnabled() {
t.Log("Enabled")
plabel, flabel = selinux.GetLxcContexts()
if plabel == "" {
t.Log("No lxc contexts, skipping tests")
return
}
t.Log(plabel)
t.Log(flabel)
selinux.FreeLxcContexts(plabel)
plabel, flabel = selinux.GetLxcContexts()
t.Log(plabel)
t.Log(flabel)
selinux.FreeLxcContexts(plabel)
t.Log("getenforce ", selinux.SelinuxGetEnforce())
t.Log("getenforcemode ", selinux.SelinuxGetEnforceMode())
pid := os.Getpid()
t.Logf("PID:%d MCS:%s\n", pid, selinux.IntToMcs(pid, 1023))
err = selinux.Setfscreatecon("unconfined_u:unconfined_r:unconfined_t:s0")
if err == nil {
t.Log(selinux.Getfscreatecon())
} else {
t.Log("setfscreatecon failed", err)
t.Fatal(err)
}
err = selinux.Setfscreatecon("")
if err == nil {
t.Log(selinux.Getfscreatecon())
} else {
t.Log("setfscreatecon failed", err)
t.Fatal(err)
}
t.Log(selinux.Getpidcon(1))
} else {
t.Log("Disabled")
}
}
func TestInit(t *testing.T) {
if selinux.SelinuxEnabled() {
var testNull []string
plabel, mlabel, err := InitLabels("", testNull)
if err != nil {
t.Log("InitLabels Failed")
t.Fatal(err)
}
testDisabled := []string{"disable"}
plabel, mlabel, err = InitLabels("", testDisabled)
if err != nil {
t.Log("InitLabels Disabled Failed")
t.Fatal(err)
}
if plabel != "" {
t.Log("InitLabels Disabled Failed")
t.Fatal(plabel)
}
testUser := []string{"user:user_u", "role:user_r", "type:user_t", "level:s0:c1,c15"}
plabel, mlabel, err = InitLabels("", testUser)
if err != nil {
t.Log("InitLabels User Failed")
t.Fatal(err)
}
if plabel != "user_u:user_r:user_t:s0:c1,c15" || mlabel != "user_u:object_r:svirt_sandbox_file_t:s0:c1,c15" {
t.Log("InitLabels User Match Failed - unable to test policy")
t.Log(plabel, mlabel)
return
}
testBadData := []string{"user", "role:user_r", "type:user_t", "level:s0:c1,c15"}
plabel, mlabel, err = InitLabels("", testBadData)
if err == nil {
t.Log("InitLabels Bad Failed")
t.Fatal(err)
}
}
}
// Init initialises the labeling system
func Init() {
selinux.SelinuxEnabled()
}
// Tell the kernel the label for all files to be created
func SetFileCreateLabel(fileLabel string) error {
if selinux.SelinuxEnabled() {
return selinux.Setfscreatecon(fileLabel)
}
return nil
}
// SetFileLabel modifies the "path" label to the specified file label
func SetFileLabel(path string, fileLabel string) error {
if selinux.SelinuxEnabled() && fileLabel != "" {
return selinux.Setfilecon(path, fileLabel)
}
return nil
}