mirror of
https://github.com/tailscale/tailscale.git
synced 2024-12-04 23:45:34 +00:00
cd916b728b
Controlled by server-sent capability policy. To be initially used for SSH servers to record sessions to other nodes. Not yet productized into something user-accessible. (Notably, the list of Taildrop targets from the sender side isn't augmented yet.) This purely permits expanding the set of expands a node will accept a drop from. Updates #3802 Updates #4217 Change-Id: Id7a5bccd686490f8ef2cdc7dae7c07c440dc0085 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
628 lines
15 KiB
Go
628 lines
15 KiB
Go
// Copyright (c) 2021 Tailscale Inc & AUTHORS All rights reserved.
|
||
// Use of this source code is governed by a BSD-style
|
||
// license that can be found in the LICENSE file.
|
||
|
||
package ipnlocal
|
||
|
||
import (
|
||
"bytes"
|
||
"fmt"
|
||
"io"
|
||
"io/fs"
|
||
"io/ioutil"
|
||
"math/rand"
|
||
"net/http"
|
||
"net/http/httptest"
|
||
"os"
|
||
"path/filepath"
|
||
"runtime"
|
||
"strings"
|
||
"testing"
|
||
|
||
"inet.af/netaddr"
|
||
"tailscale.com/ipn"
|
||
"tailscale.com/tailcfg"
|
||
"tailscale.com/tstest"
|
||
"tailscale.com/types/logger"
|
||
"tailscale.com/wgengine"
|
||
"tailscale.com/wgengine/filter"
|
||
)
|
||
|
||
type peerAPITestEnv struct {
|
||
ph *peerAPIHandler
|
||
rr *httptest.ResponseRecorder
|
||
logBuf tstest.MemLogger
|
||
}
|
||
|
||
type check func(*testing.T, *peerAPITestEnv)
|
||
|
||
func checks(vv ...check) []check { return vv }
|
||
|
||
func httpStatus(wantStatus int) check {
|
||
return func(t *testing.T, e *peerAPITestEnv) {
|
||
if res := e.rr.Result(); res.StatusCode != wantStatus {
|
||
t.Errorf("HTTP response code = %v; want %v", res.Status, wantStatus)
|
||
}
|
||
}
|
||
}
|
||
|
||
func bodyContains(sub string) check {
|
||
return func(t *testing.T, e *peerAPITestEnv) {
|
||
if body := e.rr.Body.String(); !strings.Contains(body, sub) {
|
||
t.Errorf("HTTP response body does not contain %q; got: %s", sub, body)
|
||
}
|
||
}
|
||
}
|
||
|
||
func bodyNotContains(sub string) check {
|
||
return func(t *testing.T, e *peerAPITestEnv) {
|
||
if body := e.rr.Body.String(); strings.Contains(body, sub) {
|
||
t.Errorf("HTTP response body unexpectedly contains %q; got: %s", sub, body)
|
||
}
|
||
}
|
||
}
|
||
|
||
func fileHasSize(name string, size int) check {
|
||
return func(t *testing.T, e *peerAPITestEnv) {
|
||
root := e.ph.ps.rootDir
|
||
if root == "" {
|
||
t.Errorf("no rootdir; can't check whether %q has size %v", name, size)
|
||
return
|
||
}
|
||
path := filepath.Join(root, name)
|
||
if fi, err := os.Stat(path); err != nil {
|
||
t.Errorf("fileHasSize(%q, %v): %v", name, size, err)
|
||
} else if fi.Size() != int64(size) {
|
||
t.Errorf("file %q has size %v; want %v", name, fi.Size(), size)
|
||
}
|
||
}
|
||
}
|
||
|
||
func fileHasContents(name string, want string) check {
|
||
return func(t *testing.T, e *peerAPITestEnv) {
|
||
root := e.ph.ps.rootDir
|
||
if root == "" {
|
||
t.Errorf("no rootdir; can't check contents of %q", name)
|
||
return
|
||
}
|
||
path := filepath.Join(root, name)
|
||
got, err := ioutil.ReadFile(path)
|
||
if err != nil {
|
||
t.Errorf("fileHasContents: %v", err)
|
||
return
|
||
}
|
||
if string(got) != want {
|
||
t.Errorf("file contents = %q; want %q", got, want)
|
||
}
|
||
}
|
||
}
|
||
|
||
func hexAll(v string) string {
|
||
var sb strings.Builder
|
||
for i := 0; i < len(v); i++ {
|
||
fmt.Fprintf(&sb, "%%%02x", v[i])
|
||
}
|
||
return sb.String()
|
||
}
|
||
|
||
func TestHandlePeerAPI(t *testing.T) {
|
||
tests := []struct {
|
||
name string
|
||
isSelf bool // the peer sending the request is owned by us
|
||
capSharing bool // self node has file sharing capabilty
|
||
omitRoot bool // don't configure
|
||
req *http.Request
|
||
checks []check
|
||
}{
|
||
{
|
||
name: "not_peer_api",
|
||
isSelf: true,
|
||
capSharing: true,
|
||
req: httptest.NewRequest("GET", "/", nil),
|
||
checks: checks(
|
||
httpStatus(200),
|
||
bodyContains("This is my Tailscale device."),
|
||
bodyContains("You are the owner of this node."),
|
||
),
|
||
},
|
||
{
|
||
name: "not_peer_api_not_owner",
|
||
isSelf: false,
|
||
capSharing: true,
|
||
req: httptest.NewRequest("GET", "/", nil),
|
||
checks: checks(
|
||
httpStatus(200),
|
||
bodyContains("This is my Tailscale device."),
|
||
bodyNotContains("You are the owner of this node."),
|
||
),
|
||
},
|
||
{
|
||
name: "peer_api_goroutines_deny",
|
||
isSelf: false,
|
||
req: httptest.NewRequest("GET", "/v0/goroutines", nil),
|
||
checks: checks(httpStatus(403)),
|
||
},
|
||
{
|
||
name: "peer_api_goroutines",
|
||
isSelf: true,
|
||
req: httptest.NewRequest("GET", "/v0/goroutines", nil),
|
||
checks: checks(
|
||
httpStatus(200),
|
||
bodyContains("ServeHTTP"),
|
||
),
|
||
},
|
||
{
|
||
name: "reject_non_owner_put",
|
||
isSelf: false,
|
||
capSharing: true,
|
||
req: httptest.NewRequest("PUT", "/v0/put/foo", nil),
|
||
checks: checks(
|
||
httpStatus(http.StatusForbidden),
|
||
bodyContains("Taildrop access denied"),
|
||
),
|
||
},
|
||
{
|
||
name: "owner_without_cap",
|
||
isSelf: true,
|
||
capSharing: false,
|
||
req: httptest.NewRequest("PUT", "/v0/put/foo", nil),
|
||
checks: checks(
|
||
httpStatus(http.StatusForbidden),
|
||
bodyContains("file sharing not enabled by Tailscale admin"),
|
||
),
|
||
},
|
||
{
|
||
name: "owner_with_cap_no_rootdir",
|
||
omitRoot: true,
|
||
isSelf: true,
|
||
capSharing: true,
|
||
req: httptest.NewRequest("PUT", "/v0/put/foo", nil),
|
||
checks: checks(
|
||
httpStatus(http.StatusInternalServerError),
|
||
bodyContains("Taildrop disabled; no storage directory"),
|
||
),
|
||
},
|
||
{
|
||
name: "bad_method",
|
||
isSelf: true,
|
||
capSharing: true,
|
||
req: httptest.NewRequest("POST", "/v0/put/foo", nil),
|
||
checks: checks(
|
||
httpStatus(405),
|
||
bodyContains("expected method PUT"),
|
||
),
|
||
},
|
||
{
|
||
name: "put_zero_length",
|
||
isSelf: true,
|
||
capSharing: true,
|
||
req: httptest.NewRequest("PUT", "/v0/put/foo", nil),
|
||
checks: checks(
|
||
httpStatus(200),
|
||
bodyContains("{}"),
|
||
fileHasSize("foo", 0),
|
||
fileHasContents("foo", ""),
|
||
),
|
||
},
|
||
{
|
||
name: "put_non_zero_length_content_length",
|
||
isSelf: true,
|
||
capSharing: true,
|
||
req: httptest.NewRequest("PUT", "/v0/put/foo", strings.NewReader("contents")),
|
||
checks: checks(
|
||
httpStatus(200),
|
||
bodyContains("{}"),
|
||
fileHasSize("foo", len("contents")),
|
||
fileHasContents("foo", "contents"),
|
||
),
|
||
},
|
||
{
|
||
name: "put_non_zero_length_chunked",
|
||
isSelf: true,
|
||
capSharing: true,
|
||
req: httptest.NewRequest("PUT", "/v0/put/foo", struct{ io.Reader }{strings.NewReader("contents")}),
|
||
checks: checks(
|
||
httpStatus(200),
|
||
bodyContains("{}"),
|
||
fileHasSize("foo", len("contents")),
|
||
fileHasContents("foo", "contents"),
|
||
),
|
||
},
|
||
{
|
||
name: "bad_filename_partial",
|
||
isSelf: true,
|
||
capSharing: true,
|
||
req: httptest.NewRequest("PUT", "/v0/put/foo.partial", nil),
|
||
checks: checks(
|
||
httpStatus(400),
|
||
bodyContains("bad filename"),
|
||
),
|
||
},
|
||
{
|
||
name: "bad_filename_deleted",
|
||
isSelf: true,
|
||
capSharing: true,
|
||
req: httptest.NewRequest("PUT", "/v0/put/foo.deleted", nil),
|
||
checks: checks(
|
||
httpStatus(400),
|
||
bodyContains("bad filename"),
|
||
),
|
||
},
|
||
{
|
||
name: "bad_filename_dot",
|
||
isSelf: true,
|
||
capSharing: true,
|
||
req: httptest.NewRequest("PUT", "/v0/put/.", nil),
|
||
checks: checks(
|
||
httpStatus(400),
|
||
bodyContains("bad filename"),
|
||
),
|
||
},
|
||
{
|
||
name: "bad_filename_empty",
|
||
isSelf: true,
|
||
capSharing: true,
|
||
req: httptest.NewRequest("PUT", "/v0/put/", nil),
|
||
checks: checks(
|
||
httpStatus(400),
|
||
bodyContains("empty filename"),
|
||
),
|
||
},
|
||
{
|
||
name: "bad_filename_slash",
|
||
isSelf: true,
|
||
capSharing: true,
|
||
req: httptest.NewRequest("PUT", "/v0/put/foo/bar", nil),
|
||
checks: checks(
|
||
httpStatus(400),
|
||
bodyContains("directories not supported"),
|
||
),
|
||
},
|
||
{
|
||
name: "bad_filename_encoded_dot",
|
||
isSelf: true,
|
||
capSharing: true,
|
||
req: httptest.NewRequest("PUT", "/v0/put/"+hexAll("."), nil),
|
||
checks: checks(
|
||
httpStatus(400),
|
||
bodyContains("bad filename"),
|
||
),
|
||
},
|
||
{
|
||
name: "bad_filename_encoded_slash",
|
||
isSelf: true,
|
||
capSharing: true,
|
||
req: httptest.NewRequest("PUT", "/v0/put/"+hexAll("/"), nil),
|
||
checks: checks(
|
||
httpStatus(400),
|
||
bodyContains("bad filename"),
|
||
),
|
||
},
|
||
{
|
||
name: "bad_filename_encoded_backslash",
|
||
isSelf: true,
|
||
capSharing: true,
|
||
req: httptest.NewRequest("PUT", "/v0/put/"+hexAll("\\"), nil),
|
||
checks: checks(
|
||
httpStatus(400),
|
||
bodyContains("bad filename"),
|
||
),
|
||
},
|
||
{
|
||
name: "bad_filename_encoded_dotdot",
|
||
isSelf: true,
|
||
capSharing: true,
|
||
req: httptest.NewRequest("PUT", "/v0/put/"+hexAll(".."), nil),
|
||
checks: checks(
|
||
httpStatus(400),
|
||
bodyContains("bad filename"),
|
||
),
|
||
},
|
||
{
|
||
name: "bad_filename_encoded_dotdot_out",
|
||
isSelf: true,
|
||
capSharing: true,
|
||
req: httptest.NewRequest("PUT", "/v0/put/"+hexAll("foo/../../../../../etc/passwd"), nil),
|
||
checks: checks(
|
||
httpStatus(400),
|
||
bodyContains("bad filename"),
|
||
),
|
||
},
|
||
{
|
||
name: "put_spaces_and_caps",
|
||
isSelf: true,
|
||
capSharing: true,
|
||
req: httptest.NewRequest("PUT", "/v0/put/"+hexAll("Foo Bar.dat"), strings.NewReader("baz")),
|
||
checks: checks(
|
||
httpStatus(200),
|
||
bodyContains("{}"),
|
||
fileHasContents("Foo Bar.dat", "baz"),
|
||
),
|
||
},
|
||
{
|
||
name: "put_unicode",
|
||
isSelf: true,
|
||
capSharing: true,
|
||
req: httptest.NewRequest("PUT", "/v0/put/"+hexAll("Томас и его друзья.mp3"), strings.NewReader("главный озорник")),
|
||
checks: checks(
|
||
httpStatus(200),
|
||
bodyContains("{}"),
|
||
fileHasContents("Томас и его друзья.mp3", "главный озорник"),
|
||
),
|
||
},
|
||
{
|
||
name: "put_invalid_utf8",
|
||
isSelf: true,
|
||
capSharing: true,
|
||
req: httptest.NewRequest("PUT", "/v0/put/"+(hexAll("😜")[:3]), nil),
|
||
checks: checks(
|
||
httpStatus(400),
|
||
bodyContains("bad filename"),
|
||
),
|
||
},
|
||
{
|
||
name: "put_invalid_null",
|
||
isSelf: true,
|
||
capSharing: true,
|
||
req: httptest.NewRequest("PUT", "/v0/put/%00", nil),
|
||
checks: checks(
|
||
httpStatus(400),
|
||
bodyContains("bad filename"),
|
||
),
|
||
},
|
||
{
|
||
name: "put_invalid_non_printable",
|
||
isSelf: true,
|
||
capSharing: true,
|
||
req: httptest.NewRequest("PUT", "/v0/put/%01", nil),
|
||
checks: checks(
|
||
httpStatus(400),
|
||
bodyContains("bad filename"),
|
||
),
|
||
},
|
||
{
|
||
name: "put_invalid_colon",
|
||
isSelf: true,
|
||
capSharing: true,
|
||
req: httptest.NewRequest("PUT", "/v0/put/"+hexAll("nul:"), nil),
|
||
checks: checks(
|
||
httpStatus(400),
|
||
bodyContains("bad filename"),
|
||
),
|
||
},
|
||
{
|
||
name: "put_invalid_surrounding_whitespace",
|
||
isSelf: true,
|
||
capSharing: true,
|
||
req: httptest.NewRequest("PUT", "/v0/put/"+hexAll(" foo "), nil),
|
||
checks: checks(
|
||
httpStatus(400),
|
||
bodyContains("bad filename"),
|
||
),
|
||
},
|
||
}
|
||
for _, tt := range tests {
|
||
t.Run(tt.name, func(t *testing.T) {
|
||
var e peerAPITestEnv
|
||
lb := &LocalBackend{
|
||
logf: e.logBuf.Logf,
|
||
capFileSharing: tt.capSharing,
|
||
}
|
||
e.ph = &peerAPIHandler{
|
||
isSelf: tt.isSelf,
|
||
peerNode: &tailcfg.Node{
|
||
ComputedName: "some-peer-name",
|
||
},
|
||
ps: &peerAPIServer{
|
||
b: lb,
|
||
},
|
||
}
|
||
var rootDir string
|
||
if !tt.omitRoot {
|
||
rootDir = t.TempDir()
|
||
e.ph.ps.rootDir = rootDir
|
||
}
|
||
e.rr = httptest.NewRecorder()
|
||
e.ph.ServeHTTP(e.rr, tt.req)
|
||
for _, f := range tt.checks {
|
||
f(t, &e)
|
||
}
|
||
if t.Failed() && rootDir != "" {
|
||
t.Logf("Contents of %s:", rootDir)
|
||
des, _ := fs.ReadDir(os.DirFS(rootDir), ".")
|
||
for _, de := range des {
|
||
fi, err := de.Info()
|
||
if err != nil {
|
||
t.Log(err)
|
||
} else {
|
||
t.Logf(" %v %5d %s", fi.Mode(), fi.Size(), de.Name())
|
||
}
|
||
}
|
||
}
|
||
})
|
||
}
|
||
}
|
||
|
||
// Windows likes to hold on to file descriptors for some indeterminate
|
||
// amount of time after you close them and not let you delete them for
|
||
// a bit. So test that we work around that sufficiently.
|
||
func TestFileDeleteRace(t *testing.T) {
|
||
dir := t.TempDir()
|
||
ps := &peerAPIServer{
|
||
b: &LocalBackend{
|
||
logf: t.Logf,
|
||
capFileSharing: true,
|
||
},
|
||
rootDir: dir,
|
||
}
|
||
ph := &peerAPIHandler{
|
||
isSelf: true,
|
||
peerNode: &tailcfg.Node{
|
||
ComputedName: "some-peer-name",
|
||
},
|
||
ps: ps,
|
||
}
|
||
buf := make([]byte, 2<<20)
|
||
for i := 0; i < 30; i++ {
|
||
rr := httptest.NewRecorder()
|
||
ph.ServeHTTP(rr, httptest.NewRequest("PUT", "/v0/put/foo.txt", bytes.NewReader(buf[:rand.Intn(len(buf))])))
|
||
if res := rr.Result(); res.StatusCode != 200 {
|
||
t.Fatal(res.Status)
|
||
}
|
||
wfs, err := ps.WaitingFiles()
|
||
if err != nil {
|
||
t.Fatal(err)
|
||
}
|
||
if len(wfs) != 1 {
|
||
t.Fatalf("waiting files = %d; want 1", len(wfs))
|
||
}
|
||
|
||
if err := ps.DeleteFile("foo.txt"); err != nil {
|
||
t.Fatal(err)
|
||
}
|
||
wfs, err = ps.WaitingFiles()
|
||
if err != nil {
|
||
t.Fatal(err)
|
||
}
|
||
if len(wfs) != 0 {
|
||
t.Fatalf("waiting files = %d; want 0", len(wfs))
|
||
}
|
||
}
|
||
}
|
||
|
||
// Tests "foo.jpg.deleted" marks (for Windows).
|
||
func TestDeletedMarkers(t *testing.T) {
|
||
dir := t.TempDir()
|
||
ps := &peerAPIServer{
|
||
b: &LocalBackend{
|
||
logf: t.Logf,
|
||
capFileSharing: true,
|
||
},
|
||
rootDir: dir,
|
||
}
|
||
|
||
nothingWaiting := func() {
|
||
t.Helper()
|
||
ps.knownEmpty.Set(false)
|
||
if ps.hasFilesWaiting() {
|
||
t.Fatal("unexpected files waiting")
|
||
}
|
||
}
|
||
touch := func(base string) {
|
||
t.Helper()
|
||
if err := touchFile(filepath.Join(dir, base)); err != nil {
|
||
t.Fatal(err)
|
||
}
|
||
}
|
||
wantEmptyTempDir := func() {
|
||
t.Helper()
|
||
if fis, err := ioutil.ReadDir(dir); err != nil {
|
||
t.Fatal(err)
|
||
} else if len(fis) > 0 && runtime.GOOS != "windows" {
|
||
for _, fi := range fis {
|
||
t.Errorf("unexpected file in tempdir: %q", fi.Name())
|
||
}
|
||
}
|
||
}
|
||
|
||
nothingWaiting()
|
||
wantEmptyTempDir()
|
||
|
||
touch("foo.jpg.deleted")
|
||
nothingWaiting()
|
||
wantEmptyTempDir()
|
||
|
||
touch("foo.jpg.deleted")
|
||
touch("foo.jpg")
|
||
nothingWaiting()
|
||
wantEmptyTempDir()
|
||
|
||
touch("foo.jpg.deleted")
|
||
touch("foo.jpg")
|
||
wf, err := ps.WaitingFiles()
|
||
if err != nil {
|
||
t.Fatal(err)
|
||
}
|
||
if len(wf) != 0 {
|
||
t.Fatalf("WaitingFiles = %d; want 0", len(wf))
|
||
}
|
||
wantEmptyTempDir()
|
||
|
||
touch("foo.jpg.deleted")
|
||
touch("foo.jpg")
|
||
if rc, _, err := ps.OpenFile("foo.jpg"); err == nil {
|
||
rc.Close()
|
||
t.Fatal("unexpected foo.jpg open")
|
||
}
|
||
wantEmptyTempDir()
|
||
|
||
// And verify basics still work in non-deleted cases.
|
||
touch("foo.jpg")
|
||
touch("bar.jpg.deleted")
|
||
if wf, err := ps.WaitingFiles(); err != nil {
|
||
t.Error(err)
|
||
} else if len(wf) != 1 {
|
||
t.Errorf("WaitingFiles = %d; want 1", len(wf))
|
||
} else if wf[0].Name != "foo.jpg" {
|
||
t.Errorf("unexpected waiting file %+v", wf[0])
|
||
}
|
||
if rc, _, err := ps.OpenFile("foo.jpg"); err != nil {
|
||
t.Fatal(err)
|
||
} else {
|
||
rc.Close()
|
||
}
|
||
|
||
}
|
||
|
||
func TestPeerAPIReplyToDNSQueries(t *testing.T) {
|
||
var h peerAPIHandler
|
||
|
||
h.isSelf = true
|
||
if !h.replyToDNSQueries() {
|
||
t.Errorf("for isSelf = false; want true")
|
||
}
|
||
h.isSelf = false
|
||
h.remoteAddr = netaddr.MustParseIPPort("100.150.151.152:12345")
|
||
|
||
eng, _ := wgengine.NewFakeUserspaceEngine(logger.Discard, 0)
|
||
h.ps = &peerAPIServer{
|
||
b: &LocalBackend{
|
||
e: eng,
|
||
},
|
||
}
|
||
if h.ps.b.OfferingExitNode() {
|
||
t.Fatal("unexpectedly offering exit node")
|
||
}
|
||
h.ps.b.prefs = &ipn.Prefs{
|
||
AdvertiseRoutes: []netaddr.IPPrefix{
|
||
netaddr.MustParseIPPrefix("0.0.0.0/0"),
|
||
netaddr.MustParseIPPrefix("::/0"),
|
||
},
|
||
}
|
||
if !h.ps.b.OfferingExitNode() {
|
||
t.Fatal("unexpectedly not offering exit node")
|
||
}
|
||
|
||
if h.replyToDNSQueries() {
|
||
t.Errorf("unexpectedly doing DNS without filter")
|
||
}
|
||
|
||
h.ps.b.setFilter(filter.NewAllowNone(logger.Discard, new(netaddr.IPSet)))
|
||
if h.replyToDNSQueries() {
|
||
t.Errorf("unexpectedly doing DNS without filter")
|
||
}
|
||
|
||
f := filter.NewAllowAllForTest(logger.Discard)
|
||
|
||
h.ps.b.setFilter(f)
|
||
if !h.replyToDNSQueries() {
|
||
t.Errorf("unexpectedly deny; wanted to be a DNS server")
|
||
}
|
||
|
||
// Also test IPv6.
|
||
h.remoteAddr = netaddr.MustParseIPPort("[fe70::1]:12345")
|
||
if !h.replyToDNSQueries() {
|
||
t.Errorf("unexpectedly IPv6 deny; wanted to be a DNS server")
|
||
}
|
||
}
|