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,
209 for _, f := range tests {
210 // NOTE: This is not guaranteed to work according to reflect's
211 // documentation but seems to work reliable for normal
213 fn := runtime.FuncForPC(reflect.ValueOf(f).Pointer())
215 name = name[strings.LastIndex(name, ".")+1:]
217 t.Run(name, func(t *testing.T) {
218 // Preparation & cleanup
219 for _, p := range cleanup {
221 if err != nil && !os.IsNotExist(err) {
224 // Remove the file at the end of this test
225 // run, if it was created
229 var handler func(http.ResponseWriter, *http.Request)
230 ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
244 func fetchPasswdCacheFileDoesNotExist(a args) {
246 mustWritePasswdConfig(t, a.url)
248 err := mainFetch(configPath)
249 mustBeErrorWithSubstring(t, err,
250 "file.path \""+passwdPath+"\" must exist")
252 mustNotExist(t, statePath, passwdPath, plainPath, groupPath)
255 func fetchPasswd404(a args) {
257 mustWritePasswdConfig(t, a.url)
258 mustCreate(t, passwdPath)
260 *a.handler = func(w http.ResponseWriter, r *http.Request) {
262 w.WriteHeader(http.StatusNotFound)
265 err := mainFetch(configPath)
266 mustBeErrorWithSubstring(t, err,
269 mustNotExist(t, statePath, plainPath, groupPath)
270 mustBeOld(a.t, passwdPath)
273 func fetchPasswdEmpty(a args) {
275 mustWritePasswdConfig(t, a.url)
276 mustCreate(t, passwdPath)
278 *a.handler = func(w http.ResponseWriter, r *http.Request) {
282 err := mainFetch(configPath)
283 mustBeErrorWithSubstring(t, err,
284 "refusing to use empty passwd file")
286 mustNotExist(t, statePath, plainPath, groupPath)
287 mustBeOld(t, passwdPath)
290 func fetchPasswdInvalid(a args) {
292 mustWritePasswdConfig(t, a.url)
293 mustCreate(t, passwdPath)
295 *a.handler = func(w http.ResponseWriter, r *http.Request) {
296 if r.URL.Path != "/passwd" {
300 fmt.Fprintln(w, "root:x:invalid:0:root:/root:/bin/bash")
303 err := mainFetch(configPath)
304 mustBeErrorWithSubstring(t, err,
305 "invalid uid in line")
307 mustNotExist(t, statePath, plainPath, groupPath)
308 mustBeOld(t, passwdPath)
311 func fetchPasswdLimits(a args) {
313 mustWritePasswdConfig(t, a.url)
314 mustCreate(t, passwdPath)
316 *a.handler = func(w http.ResponseWriter, r *http.Request) {
317 if r.URL.Path != "/passwd" {
321 fmt.Fprint(w, "root:x:0:0:root:/root:/bin/bash")
322 for i := 0; i < 65536; i++ {
328 err := mainFetch(configPath)
329 mustBeErrorWithSubstring(t, err,
330 "passwd too large to serialize")
332 mustNotExist(t, statePath, plainPath, groupPath)
333 mustBeOld(t, passwdPath)
336 func fetchPasswd(a args) {
338 mustWritePasswdConfig(t, a.url)
339 mustCreate(t, passwdPath)
340 mustHaveHash(t, passwdPath, "da39a3ee5e6b4b0d3255bfef95601890afd80709")
342 t.Log("First fetch, write files")
344 *a.handler = func(w http.ResponseWriter, r *http.Request) {
345 if r.URL.Path != "/passwd" {
349 // No "Last-Modified" header
350 fmt.Fprintln(w, "root:x:0:0:root:/root:/bin/bash")
351 fmt.Fprintln(w, "daemon:x:1:1:daemon:/usr/sbin:/usr/sbin/nologin")
354 err := mainFetch(configPath)
359 mustNotExist(t, plainPath, groupPath)
360 mustBeNew(t, passwdPath, statePath)
361 // The actual content of passwdPath is verified by the NSS tests
362 mustHaveHash(t, passwdPath, "bbb7db67469b111200400e2470346d5515d64c23")
364 t.Log("Fetch again, no support for Last-Modified")
366 mustMakeOld(t, passwdPath, statePath)
368 err = mainFetch(configPath)
373 mustNotExist(t, plainPath, groupPath)
374 mustBeNew(t, passwdPath, statePath)
375 mustHaveHash(t, passwdPath, "bbb7db67469b111200400e2470346d5515d64c23")
377 t.Log("Fetch again, support for Last-Modified, but not retrieved yet")
379 mustMakeOld(t, passwdPath, statePath)
381 lastChange := time.Now()
382 *a.handler = func(w http.ResponseWriter, r *http.Request) {
383 if r.URL.Path != "/passwd" {
387 modified := r.Header.Get("If-Modified-Since")
389 x, err := http.ParseTime(modified)
391 t.Fatalf("invalid If-Modified-Since %v",
394 if !x.Before(lastChange) {
395 w.WriteHeader(http.StatusNotModified)
400 w.Header().Add("Last-Modified",
401 lastChange.Format(http.TimeFormat))
402 fmt.Fprintln(w, "root:x:0:0:root:/root:/bin/bash")
403 fmt.Fprintln(w, "daemon:x:1:1:daemon:/usr/sbin:/usr/sbin/nologin")
406 err = mainFetch(configPath)
411 mustNotExist(t, plainPath, groupPath)
412 mustBeNew(t, passwdPath, statePath)
413 mustHaveHash(t, passwdPath, "bbb7db67469b111200400e2470346d5515d64c23")
415 t.Log("Fetch again, support for Last-Modified")
417 mustMakeOld(t, passwdPath, statePath)
419 err = mainFetch(configPath)
424 mustNotExist(t, plainPath, groupPath)
425 mustBeOld(t, passwdPath)
426 mustBeNew(t, statePath)
427 mustHaveHash(t, passwdPath, "bbb7db67469b111200400e2470346d5515d64c23")
429 t.Log("Corrupt local passwd cache, fetched again")
431 os.Chmod(passwdPath, 0644) // make writable again
432 mustCreate(t, passwdPath)
433 mustMakeOld(t, passwdPath, statePath)
435 err = mainFetch(configPath)
440 mustNotExist(t, plainPath, groupPath)
441 mustBeNew(t, passwdPath, statePath)
442 mustHaveHash(t, passwdPath, "bbb7db67469b111200400e2470346d5515d64c23")
445 func fetchPlainEmpty(a args) {
447 mustWriteConfig(t, fmt.Sprintf(`
454 `, statePath, a.url, plainPath))
455 mustCreate(t, plainPath)
457 *a.handler = func(w http.ResponseWriter, r *http.Request) {
461 err := mainFetch(configPath)
462 mustBeErrorWithSubstring(t, err,
463 "refusing to use empty response")
465 mustNotExist(t, statePath, passwdPath, groupPath)
466 mustBeOld(t, plainPath)
469 func fetchPlain(a args) {
471 mustWriteConfig(t, fmt.Sprintf(`
478 `, statePath, a.url, plainPath))
479 mustCreate(t, plainPath)
480 mustHaveHash(t, plainPath, "da39a3ee5e6b4b0d3255bfef95601890afd80709")
482 *a.handler = func(w http.ResponseWriter, r *http.Request) {
483 if r.URL.Path != "/plain" {
487 fmt.Fprintln(w, "some file")
490 err := mainFetch(configPath)
495 mustNotExist(t, passwdPath, groupPath)
496 mustBeNew(t, plainPath, statePath)
497 mustHaveHash(t, plainPath, "0e08b5e8c10abc3e455b75286ba4a1fbd56e18a5")
499 // Remaining functionality already tested in fetchPasswd()
502 func fetchNoConfig(a args) {
505 err := mainFetch(configPath)
506 mustBeErrorWithSubstring(t, err,
507 configPath+": no such file or directory")
509 mustNotExist(t, configPath, statePath, passwdPath, plainPath, groupPath)