1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
|
import ./make-test-python.nix ({ pkgs, lib, ... }: let
commonConfig = ./common/acme/client;
dnsServerIP = nodes: nodes.dnsserver.config.networking.primaryIPAddress;
dnsScript = nodes: let
dnsAddress = dnsServerIP nodes;
in pkgs.writeShellScript "dns-hook.sh" ''
set -euo pipefail
echo '[INFO]' "[$2]" 'dns-hook.sh' $*
if [ "$1" = "present" ]; then
${pkgs.curl}/bin/curl --data '{"host": "'"$2"'", "value": "'"$3"'"}' http://${dnsAddress}:8055/set-txt
else
${pkgs.curl}/bin/curl --data '{"host": "'"$2"'"}' http://${dnsAddress}:8055/clear-txt
fi
'';
dnsConfig = nodes: {
dnsProvider = "exec";
dnsPropagationCheck = false;
credentialsFile = pkgs.writeText "wildcard.env" ''
EXEC_PATH=${dnsScript nodes}
EXEC_POLLING_INTERVAL=1
EXEC_PROPAGATION_TIMEOUT=1
EXEC_SEQUENCE_INTERVAL=1
'';
};
documentRoot = pkgs.runCommand "docroot" {} ''
mkdir -p "$out"
echo hello world > "$out/index.html"
'';
vhostBase = {
forceSSL = true;
locations."/".root = documentRoot;
};
vhostBaseHttpd = {
forceSSL = true;
inherit documentRoot;
};
# Base specialisation config for testing general ACME features
webserverBasicConfig = {
services.nginx.enable = true;
services.nginx.virtualHosts."a.example.test" = vhostBase // {
enableACME = true;
};
};
# Generate specialisations for testing a web server
mkServerConfigs = { server, group, vhostBaseData, extraConfig ? {} }: let
baseConfig = { nodes, config, specialConfig ? {} }: lib.mkMerge [
{
security.acme = {
defaults = (dnsConfig nodes);
# One manual wildcard cert
certs."example.test" = {
domain = "*.example.test";
};
};
users.users."${config.services."${server}".user}".extraGroups = ["acme"];
services."${server}" = {
enable = true;
virtualHosts = {
# Run-of-the-mill vhost using HTTP-01 validation
"${server}-http.example.test" = vhostBaseData // {
serverAliases = [ "${server}-http-alias.example.test" ];
enableACME = true;
};
# Another which inherits the DNS-01 config
"${server}-dns.example.test" = vhostBaseData // {
serverAliases = [ "${server}-dns-alias.example.test" ];
enableACME = true;
# Set acmeRoot to null instead of using the default of "/var/lib/acme/acme-challenge"
# webroot + dnsProvider are mutually exclusive.
acmeRoot = null;
};
# One using the wildcard certificate
"${server}-wildcard.example.test" = vhostBaseData // {
serverAliases = [ "${server}-wildcard-alias.example.test" ];
useACMEHost = "example.test";
};
};
};
# Used to determine if service reload was triggered
systemd.targets."test-renew-${server}" = {
wants = [ "acme-${server}-http.example.test.service" ];
after = [ "acme-${server}-http.example.test.service" "${server}-config-reload.service" ];
};
}
specialConfig
extraConfig
];
in {
"${server}".configuration = { nodes, config, ... }: baseConfig {
inherit nodes config;
};
# Test that server reloads when an alias is removed (and subsequently test removal works in acme)
"${server}-remove-alias".configuration = { nodes, config, ... }: baseConfig {
inherit nodes config;
specialConfig = {
# Remove an alias, but create a standalone vhost in its place for testing.
# This configuration results in certificate errors as useACMEHost does not imply
# append extraDomains, and thus we can validate the SAN is removed.
services."${server}" = {
virtualHosts."${server}-http.example.test".serverAliases = lib.mkForce [];
virtualHosts."${server}-http-alias.example.test" = vhostBaseData // {
useACMEHost = "${server}-http.example.test";
};
};
};
};
# Test that the server reloads when only the acme configuration is changed.
"${server}-change-acme-conf".configuration = { nodes, config, ... }: baseConfig {
inherit nodes config;
specialConfig = {
security.acme.certs."${server}-http.example.test" = {
keyType = "ec384";
# Also test that postRun is exec'd as root
postRun = "id | grep root";
};
};
};
};
in {
name = "acme";
meta.maintainers = lib.teams.acme.members;
nodes = {
# The fake ACME server which will respond to client requests
acme = { nodes, ... }: {
imports = [ ./common/acme/server ];
networking.nameservers = lib.mkForce [ (dnsServerIP nodes) ];
};
# A fake DNS server which can be configured with records as desired
# Used to test DNS-01 challenge
dnsserver = { nodes, ... }: {
networking.firewall.allowedTCPPorts = [ 8055 53 ];
networking.firewall.allowedUDPPorts = [ 53 ];
systemd.services.pebble-challtestsrv = {
enable = true;
description = "Pebble ACME challenge test server";
wantedBy = [ "network.target" ];
serviceConfig = {
ExecStart = "${pkgs.pebble}/bin/pebble-challtestsrv -dns01 ':53' -defaultIPv6 '' -defaultIPv4 '${nodes.webserver.config.networking.primaryIPAddress}'";
# Required to bind on privileged ports.
AmbientCapabilities = [ "CAP_NET_BIND_SERVICE" ];
};
};
};
# A web server which will be the node requesting certs
webserver = { nodes, config, ... }: {
imports = [ commonConfig ];
networking.nameservers = lib.mkForce [ (dnsServerIP nodes) ];
networking.firewall.allowedTCPPorts = [ 80 443 ];
# OpenSSL will be used for more thorough certificate validation
environment.systemPackages = [ pkgs.openssl ];
# Set log level to info so that we can see when the service is reloaded
services.nginx.logError = "stderr info";
specialisation = {
# First derivation used to test general ACME features
general.configuration = { ... }: let
caDomain = nodes.acme.config.test-support.acme.caDomain;
email = config.security.acme.defaults.email;
# Exit 99 to make it easier to track if this is the reason a renew failed
accountCreateTester = ''
test -e accounts/${caDomain}/${email}/account.json || exit 99
'';
in lib.mkMerge [
webserverBasicConfig
{
# Used to test that account creation is collated into one service.
# These should not run until after acme-finished-a.example.test.target
systemd.services."b.example.test".preStart = accountCreateTester;
systemd.services."c.example.test".preStart = accountCreateTester;
services.nginx.virtualHosts."b.example.test" = vhostBase // {
enableACME = true;
};
services.nginx.virtualHosts."c.example.test" = vhostBase // {
enableACME = true;
};
}
];
# Test OCSP Stapling
ocsp-stapling.configuration = { ... }: lib.mkMerge [
webserverBasicConfig
{
security.acme.certs."a.example.test".ocspMustStaple = true;
services.nginx.virtualHosts."a.example.test" = {
extraConfig = ''
ssl_stapling on;
ssl_stapling_verify on;
'';
};
}
];
# Validate service relationships by adding a slow start service to nginx' wants.
# Reproducer for https://github.com/NixOS/nixpkgs/issues/81842
slow-startup.configuration = { ... }: lib.mkMerge [
webserverBasicConfig
{
systemd.services.my-slow-service = {
wantedBy = [ "multi-user.target" "nginx.service" ];
before = [ "nginx.service" ];
preStart = "sleep 5";
script = "${pkgs.python3}/bin/python -m http.server";
};
services.nginx.virtualHosts."slow.example.test" = {
forceSSL = true;
enableACME = true;
locations."/".proxyPass = "http://localhost:8000";
};
}
];
# Test lego internal server (listenHTTP option)
# Also tests useRoot option
lego-server.configuration = { ... }: {
security.acme.useRoot = true;
security.acme.certs."lego.example.test" = {
listenHTTP = ":80";
group = "nginx";
};
services.nginx.enable = true;
services.nginx.virtualHosts."lego.example.test" = {
useACMEHost = "lego.example.test";
onlySSL = true;
};
};
# Test compatiblity with Caddy
# It only supports useACMEHost, hence not using mkServerConfigs
} // (let
baseCaddyConfig = { nodes, config, ... }: {
security.acme = {
defaults = (dnsConfig nodes);
# One manual wildcard cert
certs."example.test" = {
domain = "*.example.test";
};
};
users.users."${config.services.caddy.user}".extraGroups = ["acme"];
services.caddy = {
enable = true;
virtualHosts."a.exmaple.test" = {
useACMEHost = "example.test";
extraConfig = ''
root * ${documentRoot}
'';
};
};
};
in {
caddy.configuration = baseCaddyConfig;
# Test that the server reloads when only the acme configuration is changed.
"caddy-change-acme-conf".configuration = { nodes, config, ... }: lib.mkMerge [
(baseCaddyConfig {
inherit nodes config;
})
{
security.acme.certs."example.test" = {
keyType = "ec384";
};
}
];
# Test compatibility with Nginx
}) // (mkServerConfigs {
server = "nginx";
group = "nginx";
vhostBaseData = vhostBase;
})
# Test compatibility with Apache HTTPD
// (mkServerConfigs {
server = "httpd";
group = <
|