1 // Copyright (C) 2019 Simon Ruderich
3 // This program is free software: you can redistribute it and/or modify
4 // it under the terms of the GNU Affero General Public License as published by
5 // the Free Software Foundation, either version 3 of the License, or
6 // (at your option) any later version.
8 // This program is distributed in the hope that it will be useful,
9 // but WITHOUT ANY WARRANTY; without even the implied warranty of
10 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 // GNU Affero General Public License for more details.
13 // You should have received a copy of the GNU Affero General Public License
14 // along with this program. If not, see <https://www.gnu.org/licenses/>.
35 configPath = "testdata/config.toml"
36 statePath = "testdata/state.json"
37 passwdPath = "testdata/passwd.nsscash"
38 plainPath = "testdata/plain"
39 groupPath = "testdata/group.nsscash"
45 handler *func(http.ResponseWriter, *http.Request)
48 // mustNotExist verifies that all given paths don't exist in the file system.
49 func mustNotExist(t *testing.T, paths ...string) {
50 for _, p := range paths {
53 if !os.IsNotExist(err) {
54 t.Errorf("path %q: unexpected error: %v",
58 t.Errorf("path %q exists", p)
64 // mustHaveHash checks if the given path content has the given SHA-1 string
66 func mustHaveHash(t *testing.T, path string, hash string) {
67 x, err := ioutil.ReadFile(path)
74 y := hex.EncodeToString(h.Sum(nil))
77 t.Errorf("%q has unexpected hash %q", path, y)
81 // mustBeErrorWithSubstring checks if the given error, represented as string,
82 // contains the given substring. This is somewhat ugly but the simplest way to
83 // check for proper errors.
84 func mustBeErrorWithSubstring(t *testing.T, err error, substring string) {
86 t.Errorf("err is nil")
87 } else if !strings.Contains(err.Error(), substring) {
88 t.Errorf("err %q does not contain string %q", err, substring)
92 func mustWriteConfig(t *testing.T, config string) {
93 err := ioutil.WriteFile(configPath, []byte(config), 0644)
99 func mustWritePasswdConfig(t *testing.T, url string) {
100 mustWriteConfig(t, fmt.Sprintf(`
107 `, statePath, url, passwdPath))
110 func mustWriteGroupConfig(t *testing.T, url string) {
111 mustWriteConfig(t, fmt.Sprintf(`
118 `, statePath, url, groupPath))
121 // mustCreate creates a file, truncating it if it exists. It then changes the
122 // modification to be in the past.
123 func mustCreate(t *testing.T, path string) {
124 f, err := os.Create(path)
133 // Change modification time to the past to detect updates to the file
137 // mustMakeOld change the modification time of all paths to be in the past.
138 func mustMakeOld(t *testing.T, paths ...string) {
139 old := time.Now().Add(-2 * time.Hour)
140 for _, p := range paths {
141 err := os.Chtimes(p, old, old)
148 // mustMakeOld verifies that all paths have a modification time in the past,
149 // as set by mustMakeOld().
150 func mustBeOld(t *testing.T, paths ...string) {
151 for _, p := range paths {
159 if now.Sub(mtime) < time.Hour {
160 t.Errorf("%q was recently modified", p)
165 // mustBeNew verifies that all paths have a modification time in the present.
166 func mustBeNew(t *testing.T, paths ...string) {
167 for _, p := range paths {
175 if now.Sub(mtime) > time.Hour {
176 t.Errorf("%q was not recently modified", p)
181 func TestMainFetch(t *testing.T) {
182 // Suppress log messages
183 log.SetOutput(ioutil.Discard)
184 defer log.SetOutput(os.Stderr)
186 tests := []func(args){
187 // Perform most tests with passwd for simplicity
188 fetchPasswdCacheFileDoesNotExist,
194 // Tests for plain and group
213 for _, f := range tests {
214 // NOTE: This is not guaranteed to work according to reflect's
215 // documentation but seems to work reliable for normal
217 fn := runtime.FuncForPC(reflect.ValueOf(f).Pointer())
219 name = name[strings.LastIndex(name, ".")+1:]
221 t.Run(name, func(t *testing.T) {
222 // Preparation & cleanup
223 for _, p := range cleanup {
225 if err != nil && !os.IsNotExist(err) {
228 // Remove the file at the end of this test
229 // run, if it was created
233 var handler func(http.ResponseWriter, *http.Request)
234 ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
248 func fetchPasswdCacheFileDoesNotExist(a args) {
250 mustWritePasswdConfig(t, a.url)
252 err := mainFetch(configPath)
253 mustBeErrorWithSubstring(t, err,
254 "file.path \""+passwdPath+"\" must exist")
256 mustNotExist(t, statePath, passwdPath, plainPath, groupPath)
259 func fetchPasswd404(a args) {
261 mustWritePasswdConfig(t, a.url)
262 mustCreate(t, passwdPath)
264 *a.handler = func(w http.ResponseWriter, r *http.Request) {
266 w.WriteHeader(http.StatusNotFound)
269 err := mainFetch(configPath)
270 mustBeErrorWithSubstring(t, err,
273 mustNotExist(t, statePath, plainPath, groupPath)
274 mustBeOld(a.t, passwdPath)
277 func fetchPasswdEmpty(a args) {
279 mustWritePasswdConfig(t, a.url)
280 mustCreate(t, passwdPath)
282 *a.handler = func(w http.ResponseWriter, r *http.Request) {
286 err := mainFetch(configPath)
287 mustBeErrorWithSubstring(t, err,
288 "refusing to use empty passwd file")
290 mustNotExist(t, statePath, plainPath, groupPath)
291 mustBeOld(t, passwdPath)
294 func fetchPasswdInvalid(a args) {
296 mustWritePasswdConfig(t, a.url)
297 mustCreate(t, passwdPath)
299 *a.handler = func(w http.ResponseWriter, r *http.Request) {
300 if r.URL.Path != "/passwd" {
304 fmt.Fprintln(w, "root:x:invalid:0:root:/root:/bin/bash")
307 err := mainFetch(configPath)
308 mustBeErrorWithSubstring(t, err,
309 "invalid uid in line")
311 mustNotExist(t, statePath, plainPath, groupPath)
312 mustBeOld(t, passwdPath)
315 func fetchPasswdLimits(a args) {
317 mustWritePasswdConfig(t, a.url)
318 mustCreate(t, passwdPath)
320 *a.handler = func(w http.ResponseWriter, r *http.Request) {
321 if r.URL.Path != "/passwd" {
325 fmt.Fprint(w, "root:x:0:0:root:/root:/bin/bash")
326 for i := 0; i < 65536; i++ {
332 err := mainFetch(configPath)
333 mustBeErrorWithSubstring(t, err,
334 "passwd too large to serialize")
336 mustNotExist(t, statePath, plainPath, groupPath)
337 mustBeOld(t, passwdPath)
340 func fetchPasswd(a args) {
342 mustWritePasswdConfig(t, a.url)
343 mustCreate(t, passwdPath)
344 mustHaveHash(t, passwdPath, "da39a3ee5e6b4b0d3255bfef95601890afd80709")
346 t.Log("First fetch, write files")
348 *a.handler = func(w http.ResponseWriter, r *http.Request) {
349 if r.URL.Path != "/passwd" {
353 // No "Last-Modified" header
354 fmt.Fprintln(w, "root:x:0:0:root:/root:/bin/bash")
355 fmt.Fprintln(w, "daemon:x:1:1:daemon:/usr/sbin:/usr/sbin/nologin")
358 err := mainFetch(configPath)
363 mustNotExist(t, plainPath, groupPath)
364 mustBeNew(t, passwdPath, statePath)
365 // The actual content of passwdPath is verified by the NSS tests
366 mustHaveHash(t, passwdPath, "bbb7db67469b111200400e2470346d5515d64c23")
368 t.Log("Fetch again, no support for Last-Modified")
370 mustMakeOld(t, passwdPath, statePath)
372 err = mainFetch(configPath)
377 mustNotExist(t, plainPath, groupPath)
378 mustBeNew(t, passwdPath, statePath)
379 mustHaveHash(t, passwdPath, "bbb7db67469b111200400e2470346d5515d64c23")
381 t.Log("Fetch again, support for Last-Modified, but not retrieved yet")
383 mustMakeOld(t, passwdPath, statePath)
385 lastChange := time.Now()
386 *a.handler = func(w http.ResponseWriter, r *http.Request) {
387 if r.URL.Path != "/passwd" {
391 modified := r.Header.Get("If-Modified-Since")
393 x, err := http.ParseTime(modified)
395 t.Fatalf("invalid If-Modified-Since %v",
398 if !x.Before(lastChange) {
399 w.WriteHeader(http.StatusNotModified)
404 w.Header().Add("Last-Modified",
405 lastChange.Format(http.TimeFormat))
406 fmt.Fprintln(w, "root:x:0:0:root:/root:/bin/bash")
407 fmt.Fprintln(w, "daemon:x:1:1:daemon:/usr/sbin:/usr/sbin/nologin")
410 err = mainFetch(configPath)
415 mustNotExist(t, plainPath, groupPath)
416 mustBeNew(t, passwdPath, statePath)
417 mustHaveHash(t, passwdPath, "bbb7db67469b111200400e2470346d5515d64c23")
419 t.Log("Fetch again, support for Last-Modified")
421 mustMakeOld(t, passwdPath, statePath)
423 err = mainFetch(configPath)
428 mustNotExist(t, plainPath, groupPath)
429 mustBeOld(t, passwdPath)
430 mustBeNew(t, statePath)
431 mustHaveHash(t, passwdPath, "bbb7db67469b111200400e2470346d5515d64c23")
433 t.Log("Corrupt local passwd cache, fetched again")
435 os.Chmod(passwdPath, 0644) // make writable again
436 mustCreate(t, passwdPath)
437 mustMakeOld(t, passwdPath, statePath)
439 err = mainFetch(configPath)
444 mustNotExist(t, plainPath, groupPath)
445 mustBeNew(t, passwdPath, statePath)
446 mustHaveHash(t, passwdPath, "bbb7db67469b111200400e2470346d5515d64c23")
449 func fetchPlainEmpty(a args) {
451 mustWriteConfig(t, fmt.Sprintf(`
458 `, statePath, a.url, plainPath))
459 mustCreate(t, plainPath)
461 *a.handler = func(w http.ResponseWriter, r *http.Request) {
465 err := mainFetch(configPath)
466 mustBeErrorWithSubstring(t, err,
467 "refusing to use empty response")
469 mustNotExist(t, statePath, passwdPath, groupPath)
470 mustBeOld(t, plainPath)
473 func fetchPlain(a args) {
475 mustWriteConfig(t, fmt.Sprintf(`
482 `, statePath, a.url, plainPath))
483 mustCreate(t, plainPath)
484 mustHaveHash(t, plainPath, "da39a3ee5e6b4b0d3255bfef95601890afd80709")
486 *a.handler = func(w http.ResponseWriter, r *http.Request) {
487 if r.URL.Path != "/plain" {
491 fmt.Fprintln(w, "some file")
494 err := mainFetch(configPath)
499 mustNotExist(t, passwdPath, groupPath)
500 mustBeNew(t, plainPath, statePath)
501 mustHaveHash(t, plainPath, "0e08b5e8c10abc3e455b75286ba4a1fbd56e18a5")
503 // Remaining functionality already tested in fetchPasswd()
506 func fetchGroupEmpty(a args) {
508 mustWriteGroupConfig(t, a.url)
509 mustCreate(t, groupPath)
511 *a.handler = func(w http.ResponseWriter, r *http.Request) {
515 err := mainFetch(configPath)
516 mustBeErrorWithSubstring(t, err,
517 "refusing to use empty group file")
519 mustNotExist(t, statePath, passwdPath, plainPath)
520 mustBeOld(t, groupPath)
523 func fetchGroupInvalid(a args) {
525 mustWriteGroupConfig(t, a.url)
526 mustCreate(t, groupPath)
528 *a.handler = func(w http.ResponseWriter, r *http.Request) {
529 if r.URL.Path != "/group" {
533 fmt.Fprintln(w, "root:x::")
536 err := mainFetch(configPath)
537 mustBeErrorWithSubstring(t, err,
538 "invalid gid in line")
540 mustNotExist(t, statePath, passwdPath, plainPath)
541 mustBeOld(t, groupPath)
544 func fetchGroupLimits(a args) {
546 mustWriteGroupConfig(t, a.url)
547 mustCreate(t, groupPath)
549 *a.handler = func(w http.ResponseWriter, r *http.Request) {
550 if r.URL.Path != "/group" {
554 fmt.Fprint(w, "root:x:0:")
555 for i := 0; i < 65536; i++ {
561 err := mainFetch(configPath)
562 mustBeErrorWithSubstring(t, err,
563 "group too large to serialize")
565 mustNotExist(t, statePath, passwdPath, plainPath)
566 mustBeOld(t, groupPath)
569 func fetchGroup(a args) {
571 mustWriteGroupConfig(t, a.url)
572 mustCreate(t, groupPath)
573 mustHaveHash(t, groupPath, "da39a3ee5e6b4b0d3255bfef95601890afd80709")
575 *a.handler = func(w http.ResponseWriter, r *http.Request) {
576 if r.URL.Path != "/group" {
580 fmt.Fprintln(w, "root:x:0:")
581 fmt.Fprintln(w, "daemon:x:1:andariel,duriel,mephisto,diablo,baal")
584 err := mainFetch(configPath)
589 mustNotExist(t, passwdPath, plainPath)
590 mustBeNew(t, groupPath, statePath)
591 // The actual content of groupPath is verified by the NSS tests
592 mustHaveHash(t, groupPath, "8c27a8403278ba2e392b86d98d4dff1fdefcafdd")
594 // Remaining functionality already tested in fetchPasswd()
597 func fetchNoConfig(a args) {
600 err := mainFetch(configPath)
601 mustBeErrorWithSubstring(t, err,
602 configPath+": no such file or directory")
604 mustNotExist(t, configPath, statePath, passwdPath, plainPath, groupPath)