mirror of
https://github.com/moby/moby.git
synced 2022-11-09 12:21:53 -05:00
397 lines
11 KiB
Go
397 lines
11 KiB
Go
// +build !windows
|
|
|
|
package idtools // import "github.com/docker/docker/pkg/idtools"
|
|
|
|
import (
|
|
"fmt"
|
|
"io/ioutil"
|
|
"os"
|
|
"os/user"
|
|
"path/filepath"
|
|
"testing"
|
|
|
|
"github.com/gotestyourself/gotestyourself/skip"
|
|
"github.com/stretchr/testify/assert"
|
|
"github.com/stretchr/testify/require"
|
|
"golang.org/x/sys/unix"
|
|
)
|
|
|
|
const (
|
|
tempUser = "tempuser"
|
|
)
|
|
|
|
type node struct {
|
|
uid int
|
|
gid int
|
|
}
|
|
|
|
func TestMkdirAllAndChown(t *testing.T) {
|
|
RequiresRoot(t)
|
|
dirName, err := ioutil.TempDir("", "mkdirall")
|
|
if err != nil {
|
|
t.Fatalf("Couldn't create temp dir: %v", err)
|
|
}
|
|
defer os.RemoveAll(dirName)
|
|
|
|
testTree := map[string]node{
|
|
"usr": {0, 0},
|
|
"usr/bin": {0, 0},
|
|
"lib": {33, 33},
|
|
"lib/x86_64": {45, 45},
|
|
"lib/x86_64/share": {1, 1},
|
|
}
|
|
|
|
if err := buildTree(dirName, testTree); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
// test adding a directory to a pre-existing dir; only the new dir is owned by the uid/gid
|
|
if err := MkdirAllAndChown(filepath.Join(dirName, "usr", "share"), 0755, IDPair{UID: 99, GID: 99}); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
testTree["usr/share"] = node{99, 99}
|
|
verifyTree, err := readTree(dirName, "")
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if err := compareTrees(testTree, verifyTree); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
// test 2-deep new directories--both should be owned by the uid/gid pair
|
|
if err := MkdirAllAndChown(filepath.Join(dirName, "lib", "some", "other"), 0755, IDPair{UID: 101, GID: 101}); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
testTree["lib/some"] = node{101, 101}
|
|
testTree["lib/some/other"] = node{101, 101}
|
|
verifyTree, err = readTree(dirName, "")
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if err := compareTrees(testTree, verifyTree); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
// test a directory that already exists; should be chowned, but nothing else
|
|
if err := MkdirAllAndChown(filepath.Join(dirName, "usr"), 0755, IDPair{UID: 102, GID: 102}); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
testTree["usr"] = node{102, 102}
|
|
verifyTree, err = readTree(dirName, "")
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if err := compareTrees(testTree, verifyTree); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
}
|
|
|
|
func TestMkdirAllAndChownNew(t *testing.T) {
|
|
RequiresRoot(t)
|
|
dirName, err := ioutil.TempDir("", "mkdirnew")
|
|
require.NoError(t, err)
|
|
defer os.RemoveAll(dirName)
|
|
|
|
testTree := map[string]node{
|
|
"usr": {0, 0},
|
|
"usr/bin": {0, 0},
|
|
"lib": {33, 33},
|
|
"lib/x86_64": {45, 45},
|
|
"lib/x86_64/share": {1, 1},
|
|
}
|
|
require.NoError(t, buildTree(dirName, testTree))
|
|
|
|
// test adding a directory to a pre-existing dir; only the new dir is owned by the uid/gid
|
|
err = MkdirAllAndChownNew(filepath.Join(dirName, "usr", "share"), 0755, IDPair{UID: 99, GID: 99})
|
|
require.NoError(t, err)
|
|
|
|
testTree["usr/share"] = node{99, 99}
|
|
verifyTree, err := readTree(dirName, "")
|
|
require.NoError(t, err)
|
|
require.NoError(t, compareTrees(testTree, verifyTree))
|
|
|
|
// test 2-deep new directories--both should be owned by the uid/gid pair
|
|
err = MkdirAllAndChownNew(filepath.Join(dirName, "lib", "some", "other"), 0755, IDPair{UID: 101, GID: 101})
|
|
require.NoError(t, err)
|
|
testTree["lib/some"] = node{101, 101}
|
|
testTree["lib/some/other"] = node{101, 101}
|
|
verifyTree, err = readTree(dirName, "")
|
|
require.NoError(t, err)
|
|
require.NoError(t, compareTrees(testTree, verifyTree))
|
|
|
|
// test a directory that already exists; should NOT be chowned
|
|
err = MkdirAllAndChownNew(filepath.Join(dirName, "usr"), 0755, IDPair{UID: 102, GID: 102})
|
|
require.NoError(t, err)
|
|
verifyTree, err = readTree(dirName, "")
|
|
require.NoError(t, err)
|
|
require.NoError(t, compareTrees(testTree, verifyTree))
|
|
}
|
|
|
|
func TestMkdirAndChown(t *testing.T) {
|
|
RequiresRoot(t)
|
|
dirName, err := ioutil.TempDir("", "mkdir")
|
|
if err != nil {
|
|
t.Fatalf("Couldn't create temp dir: %v", err)
|
|
}
|
|
defer os.RemoveAll(dirName)
|
|
|
|
testTree := map[string]node{
|
|
"usr": {0, 0},
|
|
}
|
|
if err := buildTree(dirName, testTree); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
// test a directory that already exists; should just chown to the requested uid/gid
|
|
if err := MkdirAndChown(filepath.Join(dirName, "usr"), 0755, IDPair{UID: 99, GID: 99}); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
testTree["usr"] = node{99, 99}
|
|
verifyTree, err := readTree(dirName, "")
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if err := compareTrees(testTree, verifyTree); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
// create a subdir under a dir which doesn't exist--should fail
|
|
if err := MkdirAndChown(filepath.Join(dirName, "usr", "bin", "subdir"), 0755, IDPair{UID: 102, GID: 102}); err == nil {
|
|
t.Fatalf("Trying to create a directory with Mkdir where the parent doesn't exist should have failed")
|
|
}
|
|
|
|
// create a subdir under an existing dir; should only change the ownership of the new subdir
|
|
if err := MkdirAndChown(filepath.Join(dirName, "usr", "bin"), 0755, IDPair{UID: 102, GID: 102}); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
testTree["usr/bin"] = node{102, 102}
|
|
verifyTree, err = readTree(dirName, "")
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if err := compareTrees(testTree, verifyTree); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
}
|
|
|
|
func buildTree(base string, tree map[string]node) error {
|
|
for path, node := range tree {
|
|
fullPath := filepath.Join(base, path)
|
|
if err := os.MkdirAll(fullPath, 0755); err != nil {
|
|
return fmt.Errorf("Couldn't create path: %s; error: %v", fullPath, err)
|
|
}
|
|
if err := os.Chown(fullPath, node.uid, node.gid); err != nil {
|
|
return fmt.Errorf("Couldn't chown path: %s; error: %v", fullPath, err)
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func readTree(base, root string) (map[string]node, error) {
|
|
tree := make(map[string]node)
|
|
|
|
dirInfos, err := ioutil.ReadDir(base)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("Couldn't read directory entries for %q: %v", base, err)
|
|
}
|
|
|
|
for _, info := range dirInfos {
|
|
s := &unix.Stat_t{}
|
|
if err := unix.Stat(filepath.Join(base, info.Name()), s); err != nil {
|
|
return nil, fmt.Errorf("Can't stat file %q: %v", filepath.Join(base, info.Name()), err)
|
|
}
|
|
tree[filepath.Join(root, info.Name())] = node{int(s.Uid), int(s.Gid)}
|
|
if info.IsDir() {
|
|
// read the subdirectory
|
|
subtree, err := readTree(filepath.Join(base, info.Name()), filepath.Join(root, info.Name()))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
for path, nodeinfo := range subtree {
|
|
tree[path] = nodeinfo
|
|
}
|
|
}
|
|
}
|
|
return tree, nil
|
|
}
|
|
|
|
func compareTrees(left, right map[string]node) error {
|
|
if len(left) != len(right) {
|
|
return fmt.Errorf("Trees aren't the same size")
|
|
}
|
|
for path, nodeLeft := range left {
|
|
if nodeRight, ok := right[path]; ok {
|
|
if nodeRight.uid != nodeLeft.uid || nodeRight.gid != nodeLeft.gid {
|
|
// mismatch
|
|
return fmt.Errorf("mismatched ownership for %q: expected: %d:%d, got: %d:%d", path,
|
|
nodeLeft.uid, nodeLeft.gid, nodeRight.uid, nodeRight.gid)
|
|
}
|
|
continue
|
|
}
|
|
return fmt.Errorf("right tree didn't contain path %q", path)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func delUser(t *testing.T, name string) {
|
|
_, err := execCmd("userdel", name)
|
|
assert.NoError(t, err)
|
|
}
|
|
|
|
func TestParseSubidFileWithNewlinesAndComments(t *testing.T) {
|
|
tmpDir, err := ioutil.TempDir("", "parsesubid")
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
fnamePath := filepath.Join(tmpDir, "testsubuid")
|
|
fcontent := `tss:100000:65536
|
|
# empty default subuid/subgid file
|
|
|
|
dockremap:231072:65536`
|
|
if err := ioutil.WriteFile(fnamePath, []byte(fcontent), 0644); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
ranges, err := parseSubidFile(fnamePath, "dockremap")
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if len(ranges) != 1 {
|
|
t.Fatalf("wanted 1 element in ranges, got %d instead", len(ranges))
|
|
}
|
|
if ranges[0].Start != 231072 {
|
|
t.Fatalf("wanted 231072, got %d instead", ranges[0].Start)
|
|
}
|
|
if ranges[0].Length != 65536 {
|
|
t.Fatalf("wanted 65536, got %d instead", ranges[0].Length)
|
|
}
|
|
}
|
|
|
|
func TestGetRootUIDGID(t *testing.T) {
|
|
uidMap := []IDMap{
|
|
{
|
|
ContainerID: 0,
|
|
HostID: os.Getuid(),
|
|
Size: 1,
|
|
},
|
|
}
|
|
gidMap := []IDMap{
|
|
{
|
|
ContainerID: 0,
|
|
HostID: os.Getgid(),
|
|
Size: 1,
|
|
},
|
|
}
|
|
|
|
uid, gid, err := GetRootUIDGID(uidMap, gidMap)
|
|
assert.NoError(t, err)
|
|
assert.Equal(t, os.Getegid(), uid)
|
|
assert.Equal(t, os.Getegid(), gid)
|
|
|
|
uidMapError := []IDMap{
|
|
{
|
|
ContainerID: 1,
|
|
HostID: os.Getuid(),
|
|
Size: 1,
|
|
},
|
|
}
|
|
_, _, err = GetRootUIDGID(uidMapError, gidMap)
|
|
assert.EqualError(t, err, "Container ID 0 cannot be mapped to a host ID")
|
|
}
|
|
|
|
func TestToContainer(t *testing.T) {
|
|
uidMap := []IDMap{
|
|
{
|
|
ContainerID: 2,
|
|
HostID: 2,
|
|
Size: 1,
|
|
},
|
|
}
|
|
|
|
containerID, err := toContainer(2, uidMap)
|
|
assert.NoError(t, err)
|
|
assert.Equal(t, uidMap[0].ContainerID, containerID)
|
|
}
|
|
|
|
func TestNewIDMappings(t *testing.T) {
|
|
RequiresRoot(t)
|
|
_, _, err := AddNamespaceRangesUser(tempUser)
|
|
assert.NoError(t, err)
|
|
defer delUser(t, tempUser)
|
|
|
|
tempUser, err := user.Lookup(tempUser)
|
|
assert.NoError(t, err)
|
|
|
|
gids, err := tempUser.GroupIds()
|
|
assert.NoError(t, err)
|
|
group, err := user.LookupGroupId(string(gids[0]))
|
|
assert.NoError(t, err)
|
|
|
|
idMappings, err := NewIDMappings(tempUser.Username, group.Name)
|
|
assert.NoError(t, err)
|
|
|
|
rootUID, rootGID, err := GetRootUIDGID(idMappings.UIDs(), idMappings.GIDs())
|
|
assert.NoError(t, err)
|
|
|
|
dirName, err := ioutil.TempDir("", "mkdirall")
|
|
assert.NoError(t, err, "Couldn't create temp directory")
|
|
defer os.RemoveAll(dirName)
|
|
|
|
err = MkdirAllAndChown(dirName, 0700, IDPair{UID: rootUID, GID: rootGID})
|
|
assert.NoError(t, err, "Couldn't change ownership of file path. Got error")
|
|
assert.True(t, CanAccess(dirName, idMappings.RootPair()), fmt.Sprintf("Unable to access %s directory with user UID:%d and GID:%d", dirName, rootUID, rootGID))
|
|
}
|
|
|
|
func TestLookupUserAndGroup(t *testing.T) {
|
|
RequiresRoot(t)
|
|
uid, gid, err := AddNamespaceRangesUser(tempUser)
|
|
assert.NoError(t, err)
|
|
defer delUser(t, tempUser)
|
|
|
|
fetchedUser, err := LookupUser(tempUser)
|
|
assert.NoError(t, err)
|
|
|
|
fetchedUserByID, err := LookupUID(uid)
|
|
assert.NoError(t, err)
|
|
assert.Equal(t, fetchedUserByID, fetchedUser)
|
|
|
|
fetchedGroup, err := LookupGroup(tempUser)
|
|
assert.NoError(t, err)
|
|
|
|
fetchedGroupByID, err := LookupGID(gid)
|
|
assert.NoError(t, err)
|
|
assert.Equal(t, fetchedGroupByID, fetchedGroup)
|
|
}
|
|
|
|
func TestLookupUserAndGroupThatDoesNotExist(t *testing.T) {
|
|
fakeUser := "fakeuser"
|
|
_, err := LookupUser(fakeUser)
|
|
assert.EqualError(t, err, "getent unable to find entry \""+fakeUser+"\" in passwd database")
|
|
|
|
_, err = LookupUID(-1)
|
|
assert.Error(t, err)
|
|
|
|
fakeGroup := "fakegroup"
|
|
_, err = LookupGroup(fakeGroup)
|
|
assert.EqualError(t, err, "getent unable to find entry \""+fakeGroup+"\" in group database")
|
|
|
|
_, err = LookupGID(-1)
|
|
assert.Error(t, err)
|
|
}
|
|
|
|
// TestMkdirIsNotDir checks that mkdirAs() function (used by MkdirAll...)
|
|
// returns a correct error in case a directory which it is about to create
|
|
// already exists but is a file (rather than a directory).
|
|
func TestMkdirIsNotDir(t *testing.T) {
|
|
file, err := ioutil.TempFile("", t.Name())
|
|
if err != nil {
|
|
t.Fatalf("Couldn't create temp dir: %v", err)
|
|
}
|
|
defer os.Remove(file.Name())
|
|
|
|
err = mkdirAs(file.Name(), 0755, 0, 0, false, false)
|
|
assert.EqualError(t, err, "mkdir "+file.Name()+": not a directory")
|
|
}
|
|
|
|
func RequiresRoot(t *testing.T) {
|
|
skip.IfCondition(t, os.Getuid() != 0, "skipping test that requires root")
|
|
}
|