summaryrefslogtreecommitdiffstats
path: root/features/step_definitions/usb.rb
blob: ec563fdad4611d6fb38549122b901a667b2c7633 (plain)
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
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
# Returns a hash that for each persistence preset the running Tails is aware of,
# for each of the corresponding configuration lines,
# maps the source to the destination.
def get_persistence_presets_config(skip_links = false)
  # Perl script that prints all persistence configuration lines (one per line)
  # in the form: <mount_point>:<comma-separated-list-of-options>
  script = <<-EOF
  use strict;
  use warnings FATAL => "all";
  use Tails::Persistence::Configuration::Presets;
  foreach my $atom (Tails::Persistence::Configuration::Presets->new()->atoms) {
    say $atom->destination, ":", join(",", @{$atom->options});
  }
EOF
  # VMCommand:s cannot handle newlines, and they're irrelevant in the
  # above perl script any way
  script.delete!("\n")
  presets_configs = $vm.execute_successfully("perl -E '#{script}'")
                       .stdout.chomp.split("\n")
  assert presets_configs.size >= 10,
         "Got #{presets_configs.size} persistence preset configuration lines, " +
         "which is too few"
  persistence_mapping = Hash.new
  for line in presets_configs
    destination, options_str = line.split(":")
    options = options_str.split(",")
    is_link = options.include? "link"
    next if is_link and skip_links
    source_str = options.find { |option| /^source=/.match option }
    # If no source is given as an option, live-boot's persistence
    # feature defaults to the destination minus the initial "/".
    if source_str.nil?
      source = destination.partition("/").last
    else
      source = source_str.split("=")[1]
    end
    persistence_mapping[source] = destination
  end
  return persistence_mapping
end

def persistent_dirs
  get_persistence_presets_config
end

def persistent_mounts
  get_persistence_presets_config(true)
end

def persistent_volumes_mountpoints
  $vm.execute("ls -1 -d /live/persistence/*_unlocked/").stdout.chomp.split
end

# Returns an array that for each persistence preset the running Tails is aware of,
# contains a hash with the following keys: id, enabled, has_configuration_button.
def persistent_presets_ui_settings
  # Perl script that prints all persistence presets
  # in the form: <id>:<enabled>:<has_configuration_button>
  script = <<-EOF
  use strict;
  use warnings FATAL => "all";
  use Tails::Persistence::Configuration::Presets;
  foreach my $preset (Tails::Persistence::Configuration::Presets->new()->all) {
    say(sprintf(
      "%s:%s:%s",
      $preset->{id},
      ($preset->{enabled} ? 1 : 0),
      (exists($preset->{configuration_app_desktop_id}) && defined($preset->{configuration_app_desktop_id})
         ? 1
         : 0
      ),
    ));
  }
EOF
  # VMCommand:s cannot handle newlines, and they're irrelevant in the
  # above perl script any way
  script.delete!("\n")
  presets = $vm.execute_successfully("perl -E '#{script}'")
               .stdout.chomp.split("\n")
  assert presets.size >= 10,
         "Got #{presets.size} persistence presets, " +
         "which is too few"
  presets_ui_settings = Array.new
  for line in presets
    id, enabled, has_configuration_button = line.split(":")
    presets_ui_settings += [{
      'id'                       => id,
      'enabled'                  => (enabled == '1'),
      'has_configuration_button' => (has_configuration_button == '1'),
    }]
  end
  return presets_ui_settings
end


def recover_from_upgrader_failure
  $vm.execute('pkill --full tails-upgrade-frontend-wrapper')
  $vm.execute('killall tails-upgrade-frontend zenity')
  # Do not sleep when retrying
  $vm.execute_successfully('/usr/local/bin/tails-upgrade-frontend-wrapper --no-wait')
  $vm.spawn('tails-upgrade-frontend-wrapper', user: LIVE_USER)
end

Given /^I clone USB drive "([^"]+)" to a (new|temporary) USB drive "([^"]+)"$/ do |from, mode, to|
  $vm.storage.clone_to_new_disk(from, to)
  if mode == 'temporary'
    add_after_scenario_hook { $vm.storage.delete_volume(to) }
  end
end

Given /^I unplug USB drive "([^"]+)"$/ do |name|
  $vm.unplug_drive(name)
end

Given /^the computer is set to boot from the old Tails DVD$/ do
  $vm.set_cdrom_boot(OLD_TAILS_ISO)
end

Given /^the computer is set to boot in UEFI mode$/ do
  $vm.set_os_loader('UEFI')
  @os_loader = 'UEFI'
end

def tails_installer_selected_device
  @installer.child('Target USB stick:', roleName: 'label').parent
    .child('', roleName: 'combo box', recursive: false).name
end

def tails_installer_is_device_selected?(name)
  device = $vm.disk_dev(name)
  tails_installer_selected_device[/\(#{device}\d*\)$/]
end

def tails_installer_match_status(pattern)
  @installer.child('', roleName: 'text').text[pattern]
end

When /^I start Tails Installer$/ do
  @installer_log_path = '/tmp/tails-installer.log'
  step "I run \"/usr/bin/tails-installer --verbose > #{@installer_log_path} 2>&1\" in GNOME Terminal"
  @installer = Dogtail::Application.new('tails-installer')
  @installer.child('Tails Installer', roleName: 'frame')
  # Sometimes Dogtail will find the Installer and click its window
  # before it is shown (searchShowingOnly is not perfect) which
  # generally means clicking somewhere on the Terminal => the click is
  # lost *and* the installer does not go to the foreground. So let's
  # wait a bit extra.
  sleep 3
  $vm.focus_window('Tails Installer')
end

When /^I am told by Tails Installer that.*"([^"]+)".*$/ do |status|
  try_for(10) do
    tails_installer_match_status(status)
  end
end

Then /^a suitable USB device is (?:still )?not found$/ do
  @installer.child(
    'No device suitable to install Tails could be found', roleName: 'label'
  )
end

Then /^(no|the "([^"]+)") USB drive is selected$/ do |mode, name|
  try_for(30) do
    if mode == 'no'
      tails_installer_selected_device == ''
    else
      tails_installer_is_device_selected?(name)
    end
  end
end

When /^I (install|reinstall|upgrade) Tails (?:to|on) USB drive "([^"]+)" (by cloning|from an ISO)$/ do |action, name, source|
  step "I start Tails Installer"
  # If the device was plugged *just* before this step, it might not be
  # completely ready (so it's shown) at this stage.
  try_for(10) { tails_installer_is_device_selected?(name) }
  if source == 'from an ISO'
    iso_radio = @installer.child('Use a downloaded Tails ISO image',
                                 roleName: 'radio button')
    iso_radio.click
    iso_radio.parent.button('(None)').click
    file_chooser = @installer.child('Select a File', roleName: 'file chooser')
    @screen.type("l", Sikuli::KeyModifier.CTRL)
    # The only visible text element will be the path entry
    file_chooser.child(roleName: 'text').typeText(@iso_path + '\n')
    file_chooser.button('Open').click
  end
  begin
    if action == 'reinstall'
      label = 'Reinstall (delete all data)'
    else
      label = action.capitalize
    end
    @installer.button(label).click
    if action == 'upgrade'
      confirmation_label = 'Upgrade'
    else
      confirmation_label = 'Install'
    end
    @installer.child('Question', roleName: 'alert').button(confirmation_label).click
    try_for(15*60, { :delay => 10 }) do
      @installer
        .child('Information', roleName: 'alert')
        .child('Installation complete!', roleName: 'label')
      true
    end
  rescue Exception => e
    debug_log("Tails Installer debug log:\n" +
              $vm.file_content(@installer_log_path))
    raise e
  end
end

Given /^I plug and mount a USB drive containing the Tails ISO$/ do
  iso_dir = share_host_files(TAILS_ISO)
  @iso_path = "#{iso_dir}/#{File.basename(TAILS_ISO)}"
end

Given /^I enable all persistence presets$/ do
  @screen.wait('PersistenceWizardPresets.png', 20)
  presets = persistent_presets_ui_settings
  presets[0]['is_first'] = true
  debug_log("presets: #{presets}")
  for setting in presets
    debug_log("on preset: #{setting}")
    tabs_to_select_switch  = 3 # previous switch -> separator -> row -> switch
    tabs_to_select_switch -= 1 if setting['is_first']
    tabs_to_select_switch += 1 if setting['has_configuration_button']
    # Select the switch
    debug_log("typing TAB #{tabs_to_select_switch} times to select the switch")
    tabs_to_select_switch.times do
      debug_log("typing TAB")
      @screen.type(Sikuli::Key.TAB)
    end
    # Activate the switch
    if ! setting['enabled']
      debug_log("pressing space")
      @screen.type(Sikuli::Key.SPACE)
    else
      debug_log("setting already enabled, skipping")
    end
  end
  save_and_exit_the_persistence_wizard
end

def save_and_exit_the_persistence_wizard
  @screen.type(Sikuli::Key.ENTER) # Press the Save button
  @screen.wait('PersistenceWizardDone.png', 60)
  @screen.type(Sikuli::Key.F4, Sikuli::KeyModifier.ALT)
end

When /^I disable the first persistence preset$/ do
  step 'I start "Configure persistent volume" via GNOME Activities Overview'
  @screen.wait('PersistenceWizardPresets.png', 300)
  @screen.type(Sikuli::Key.TAB)
  @screen.type(Sikuli::Key.SPACE)
  @screen.type(Sikuli::Key.ENTER)
  @screen.wait('PersistenceWizardDone.png', 30)
  @screen.type(Sikuli::Key.F4, Sikuli::KeyModifier.ALT)
end

Given /^I create a persistent partition( for Additional Software)?$/ do |asp|
  if not asp
    step 'I start "Configure persistent volume" via GNOME Activities Overview'
  end
  @screen.wait('PersistenceWizardStart.png', 60)
  @screen.type(@persistence_password + "\t" + @persistence_password + Sikuli::Key.ENTER)
  @screen.wait('PersistenceWizardPresets.png', 300)
  if not asp
    step "I enable all persistence presets"
  end
end

def check_disk_integrity(name, dev, scheme)
  info = $vm.execute("udisksctl info --block-device '#{dev}'").stdout
  info_split = info.split("\n  org\.freedesktop\.UDisks2\.PartitionTable:\n")
  dev_info = info_split[0]
  part_table_info = info_split[1]
  assert(part_table_info.match("^    Type: +#{scheme}$"),
         "Unexpected partition scheme on USB drive '#{name}', '#{dev}'")
end

def check_part_integrity(name, dev, usage, fs_type, part_label = nil, part_type = nil)
  info = $vm.execute("udisksctl info --block-device '#{dev}'").stdout
  info_split = info.split("\n  org\.freedesktop\.UDisks2\.Partition:\n")
  dev_info = info_split[0]
  part_info = info_split[1]
  assert(dev_info.match("^    IdUsage: +#{usage}$"),
         "Unexpected device field 'usage' on USB drive '#{name}', '#{dev}'")
  assert(dev_info.match("^    IdType: +#{fs_type}$"),
         "Unexpected device field 'IdType' on USB drive '#{name}', '#{dev}'")
  if part_label
    assert(part_info.match("^    Name: +#{part_label}$"),
           "Unexpected partition label on USB drive '#{name}', '#{dev}'")
  end
  if part_type
    assert(part_info.match("^    Type: +#{part_type}$"),
           "Unexpected partition type on USB drive '#{name}', '#{dev}'")
  end
end

def tails_is_installed_helper(name, tails_root, loader)
  disk_dev = $vm.disk_dev(name)
  part_dev = disk_dev + "1"
  check_disk_integrity(name, disk_dev, "gpt")
  check_part_integrity(name, part_dev, "filesystem", "vfat", "Tails",
                       # EFI System Partition
                       'c12a7328-f81f-11d2-ba4b-00a0c93ec93b')

  target_root = "/mnt/new"
  $vm.execute("mkdir -p #{target_root}")
  $vm.execute("mount #{part_dev} #{target_root}")

  c = $vm.execute("diff -qr '#{tails_root}/live' '#{target_root}/live'")
  assert(c.success?,
         "USB drive '#{name}' has differences in /live:\n#{c.stdout}\n#{c.stderr}")

  syslinux_files = $vm.execute("ls -1 #{target_root}/syslinux").stdout.chomp.split
  # We deal with these files separately
  ignores = ["syslinux.cfg", "exithelp.cfg", "ldlinux.c32", "ldlinux.sys"]
  for f in syslinux_files - ignores do
    c = $vm.execute("diff -q '#{tails_root}/#{loader}/#{f}' " +
                    "'#{target_root}/syslinux/#{f}'")
    assert(c.success?, "USB drive '#{name}' has differences in " +
           "'/syslinux/#{f}'")
  end

  # The main .cfg is named differently vs isolinux
  c = $vm.execute("diff -q '#{tails_root}/#{loader}/#{loader}.cfg' " +
                  "'#{target_root}/syslinux/syslinux.cfg'")
  assert(c.success?, "USB drive '#{name}' has differences in " +
         "'/syslinux/syslinux.cfg'")

  $vm.execute("umount #{target_root}")
  $vm.execute("sync")
end

Then /^the running Tails is installed on USB drive "([^"]+)"$/ do |target_name|
  loader = boot_device_type == "usb" ? "syslinux" : "isolinux"
  tails_is_installed_helper(target_name, "/lib/live/mount/medium", loader)
end

Then /^the ISO's Tails is installed on USB drive "([^"]+)"$/ do |target_name|
  iso_root = "/mnt/iso"
  $vm.execute("mkdir -p #{iso_root}")
  $vm.execute("mount -o loop #{@iso_path} #{iso_root}")
  tails_is_installed_helper(target_name, iso_root, "isolinux")
  $vm.execute("umount #{iso_root}")
end

Then /^there is no persistence partition on USB drive "([^"]+)"$/ do |name|
  data_part_dev = $vm.disk_dev(name) + "2"
  assert(!$vm.execute("test -b #{data_part_dev}").success?,
         "USB drive #{name} has a partition '#{data_part_dev}'")
end

Then /^a Tails persistence partition exists on USB drive "([^"]+)"$/ do |name|
  dev = $vm.disk_dev(name) + "2"
  check_part_integrity(name, dev, "crypto", "crypto_LUKS", "TailsData")

  # The LUKS container may already be opened, e.g. by udisks after
  # we've run tails-persistence-setup.
  c = $vm.execute("ls -1 --hide 'control' /dev/mapper/")
  if c.success?
    for candidate in c.stdout.split("\n")
      luks_info = $vm.execute("cryptsetup status '#{candidate}'")
      if luks_info.success? and luks_info.stdout.match("^\s+device:\s+#{dev}$")
        luks_dev = "/dev/mapper/#{candidate}"
        break
      end
    end
  end
  if luks_dev.nil?
    c = $vm.execute("echo #{@persistence_password} | " +
                    "cryptsetup luksOpen #{dev} #{name}")
    assert(c.success?, "Couldn't open LUKS device '#{dev}' on  drive '#{name}'")
    luks_dev = "/dev/mapper/#{name}"
  end

  # Check LUKS1 vs. LUKS2:
  luks_info = $vm.execute("cryptsetup status #{luks_dev}").stdout
  assert(luks_info.match("^ +type: +LUKS2$"),
         "Device #{luks_dev} doesn't appear to be LUKS2")

  # Adapting check_part_integrity() seems like a bad idea so here goes
  info = $vm.execute("udisksctl info --block-device '#{luks_dev}'").stdout
  assert info.match("^    CryptoBackingDevice: +'/[a-zA-Z0-9_/]+'$")
  assert info.match("^    IdUsage: +filesystem$")
  assert info.match("^    IdType: +ext[34]$")
  assert info.match("^    IdLabel: +TailsData$")

  mount_dir = "/mnt/#{name}"
  $vm.execute("mkdir -p #{mount_dir}")
  c = $vm.execute("mount '#{luks_dev}' #{mount_dir}")
  assert(c.success?,
         "Couldn't mount opened LUKS device '#{dev}' on drive '#{name}'")

  $vm.execute("umount #{mount_dir}")
  $vm.execute("sync")
  $vm.execute("cryptsetup luksClose #{name}")
end

Given /^I enable persistence$/ do
  @screen.wait_and_click('TailsGreeterPersistencePassphrase.png', 60)
  @screen.type(@persistence_password + Sikuli::Key.ENTER)
  @screen.wait('TailsGreeterPersistenceUnlocked.png', 30)
end

def tails_persistence_enabled?
  persistence_state_file = "/var/lib/live/config/tails.persistence"
  return $vm.execute("test -e '#{persistence_state_file}'").success? &&
         $vm.execute(". '#{persistence_state_file}' && " +
                     'test "$TAILS_PERSISTENCE_ENABLED" = true').success?
end

Given /^all persistence presets(| from the old Tails version)(| but the first one) are enabled$/ do |old_tails, except_first|
  assert(old_tails.empty? || except_first.empty?, "Unsupported case.")
  try_for(120, :msg => "Persistence is disabled") do
    tails_persistence_enabled?
  end
  unexpected_mounts = Array.new
  # Check that all persistent directories are mounted
  if old_tails.empty?
    expected_mounts = persistent_mounts
    if ! except_first.empty?
      first_expected_mount_source      = expected_mounts.keys[0]
      first_expected_mount_destination = expected_mounts[first_expected_mount_source]
      expected_mounts.delete(first_expected_mount_source)
      unexpected_mounts = [first_expected_mount_destination]
    end
  else
    assert_not_nil($remembered_persistence_mounts)
    expected_mounts = $remembered_persistence_mounts
  end
  mount = $vm.execute("mount").stdout.chomp
  for _, dir in expected_mounts do
    assert(mount.include?("on #{dir} "),
           "Persistent directory '#{dir}' is not mounted")
  end
  for dir in unexpected_mounts do
    assert(! mount.include?("on #{dir} "),
           "Persistent directory '#{dir}' is mounted")
  end
end

Given /^persistence is disabled$/ do
  assert(!tails_persistence_enabled?, "Persistence is enabled")
end

def boot_device
  # Approach borrowed from
  # config/chroot_local_includes/lib/live/config/998-permissions
  boot_dev_id = $vm.execute("udevadm info --device-id-of-file=/lib/live/mount/medium").stdout.chomp
  boot_dev = $vm.execute("readlink -f /dev/block/'#{boot_dev_id}'").stdout.chomp
  return boot_dev
end

def device_info(dev)
  # Approach borrowed from
  # config/chroot_local_includes/lib/live/config/998-permissions
  info = $vm.execute("udevadm info --query=property --name='#{dev}'").stdout.chomp
  info.split("\n").map { |e| e.split('=') } .to_h
end

def boot_device_type
  device_info(boot_device)['ID_BUS']
end

# Turn udisksctl info output into something more manipulable:
def parse_udisksctl_info(input)
  tree = {}
  section = nil
  key = nil
  input.chomp.split("\n").each { |line|
    case line
    when /^\/org\/freedesktop\/UDisks2\/block_devices\//
      # no-op, ignore first line = device
    when /^  (org\.freedesktop\.UDisks2\..+):$/
      section = $1
      tree[section] = {}
    when /^\s+(.+?):\s+(.+)$/
      key = $1
      value = $2
      tree[section][key] = value
    else
      # XXX: Best effort = consider this a continuation from previous
      # line (e.g. Symlinks), and add the whole line, without
      # stripping anything (e.g. leading whitespaces)
      tree[section][key] += line
    end
  }
  return tree
end

Then /^Tails is running from (.*) drive "([^"]+)"$/ do |bus, name|
  bus = bus.downcase
  case bus
  when "sata"
    expected_bus = "ata"
  else
    expected_bus = bus
  end
  assert_equal(expected_bus, boot_device_type)
  actual_dev = boot_device
  # The boot partition differs between an using Tails installer and
  # isohybrids. There's also a strange case isohybrids are thought to
  # be booting from the "raw" device, and not a partition of it
  # (#10504).
  expected_devs = ['', '1', '4'].map { |e| $vm.disk_dev(name) + e }
  assert(expected_devs.include?(actual_dev),
         "We are running from device #{actual_dev}, but for #{bus} drive " +
         "'#{name}' we expected to run from one of #{expected_devs}")
end

Then /^the boot device has safe access rights$/ do

  super_boot_dev = boot_device.sub(/[[:digit:]]+$/, "")
  devs = $vm.execute("ls -1 #{super_boot_dev}*").stdout.chomp.split
  assert(devs.size > 0, "Could not determine boot device")
  all_users = $vm.execute("cut -d':' -f1 /etc/passwd").stdout.chomp.split
  all_users_with_groups = all_users.collect do |user|
    groups = $vm.execute("groups #{user}").stdout.chomp.sub(/^#{user} : /, "").split(" ")
    [user, groups]
  end
  for dev in devs do
    dev_owner = $vm.execute("stat -c %U #{dev}").stdout.chomp
    dev_group = $vm.execute("stat -c %G #{dev}").stdout.chomp
    dev_perms = $vm.execute("stat -c %a #{dev}").stdout.chomp
    assert_equal("root", dev_owner)
    assert(dev_group == "disk" || dev_group == "root",
           "Boot device '#{dev}' owned by group '#{dev_group}', expected " +
           "'disk' or 'root'.")
    assert_equal("660", dev_perms)
    for user, groups in all_users_with_groups do
      next if user == "root"
      assert(!(groups.include?(dev_group)),
             "Unprivileged user '#{user}' is in group '#{dev_group}' which " +
             "owns boot device '#{dev}'")
    end
  end

  info = $vm.execute("udisksctl info --block-device '#{super_boot_dev}'").stdout
  assert(info.match("^    HintSystem: +true$"),
         "Boot device '#{super_boot_dev}' is not system internal for udisks")
end

Then /^all persistent filesystems have safe access rights$/ do
  persistent_volumes_mountpoints.each do |mountpoint|
    fs_owner = $vm.execute("stat -c %U #{mountpoint}").stdout.chomp
    fs_group = $vm.execute("stat -c %G #{mountpoint}").stdout.chomp
    fs_perms = $vm.execute("stat -c %a #{mountpoint}").stdout.chomp
    assert_equal("root", fs_owner)
    assert_equal("root", fs_group)
    assert_equal('775', fs_perms)
  end
end

Then /^all persistence configuration files have safe access rights$/ do
  persistent_volumes_mountpoints.each do |mountpoint|
    assert($vm.execute("test -e #{mountpoint}/persistence.conf").success?,
           "#{mountpoint}/persistence.conf does not exist, while it should")
    if running_tails_version.to_f >= 3.13
      assert($vm.execute("test -e #{mountpoint}/persistence.conf.bak").success?,
             "#{mountpoint}/persistence.conf.bak does not exist, while it should")
    end
    assert($vm.execute("test ! -e #{mountpoint}/live-persistence.conf").success?,
           "#{mountpoint}/live-persistence.conf does exist, while it should not")
    $vm.execute(
      "ls -1 #{mountpoint}/persistence.conf* #{mountpoint}/live-*.conf"
    ).stdout.chomp.split.each do |f|
      file_owner = $vm.execute("stat -c %U '#{f}'").stdout.chomp
      file_group = $vm.execute("stat -c %G '#{f}'").stdout.chomp
      file_perms = $vm.execute("stat -c %a '#{f}'").stdout.chomp
      assert_equal("tails-persistence-setup", file_owner)
      assert_equal("tails-persistence-setup", file_group)
      case f
      when /.*\/live-additional-software.conf$/
        assert_equal("644", file_perms)
      else
        assert_equal("600", file_perms)
      end
    end
  end
end

Then /^all persistent directories(| from the old Tails version) have safe access rights$/ do |old_tails|
  if old_tails.empty?
    expected_dirs = persistent_dirs
  else
    assert_not_nil($remembered_persistence_dirs)
    expected_dirs = $remembered_persistence_dirs
  end
  persistent_volumes_mountpoints.each do |mountpoint|
    expected_dirs.each do |src, dest|
      full_src = "#{mountpoint}/#{src}"
      assert_vmcommand_success $vm.execute("test -d #{full_src}")
      dir_perms = $vm.execute_successfully("stat -c %a '#{full_src}'").stdout.chomp
      dir_owner = $vm.execute_successfully("stat -c %U '#{full_src}'").stdout.chomp
      if dest.start_with?("/home/#{LIVE_USER}")
        expected_perms = "700"
        expected_owner = LIVE_USER
      else
        expected_perms = "755"
        expected_owner = "root"
      end
      assert_equal(expected_perms, dir_perms,
                   "Persistent source #{full_src} has permission " \
                   "#{dir_perms}, expected #{expected_perms}")
      assert_equal(expected_owner, dir_owner,
                   "Persistent source #{full_src} has owner " \
                   "#{dir_owner}, expected #{expected_owner}")
    end
  end
end

When /^I write some files expected to persist$/ do
  persistent_mounts.each do |_, dir|
    owner = $vm.execute("stat -c %U #{dir}").stdout.chomp
    assert($vm.execute("touch #{dir}/XXX_persist", :user => owner).success?,
           "Could not create file in persistent directory #{dir}")
  end
end

When /^I write some dotfile expected to persist$/ do
  assert($vm.execute("touch /live/persistence/TailsData_unlocked/dotfiles/.XXX_persist",
                     :user => LIVE_USER).success?,
         "Could not create a file in the dotfiles persistence.")
end

When /^I remove some files expected to persist$/ do
  persistent_mounts.each do |_, dir|
    owner = $vm.execute("stat -c %U #{dir}").stdout.chomp
    assert($vm.execute("rm #{dir}/XXX_persist", :user => owner).success?,
           "Could not remove file in persistent directory #{dir}")
  end
end

When /^I write some files not expected to persist$/ do
  persistent_mounts.each do |_, dir|
    owner = $vm.execute("stat -c %U #{dir}").stdout.chomp
    assert($vm.execute("touch #{dir}/XXX_gone", :user => owner).success?,
           "Could not create file in persistent directory #{dir}")
  end
end

When /^I take note of which persistence presets are available$/ do
  $remembered_persistence_mounts = persistent_mounts
  $remembered_persistence_dirs = persistent_dirs
end

Then /^the expected persistent files(| created with the old Tails version) are present in the filesystem$/ do |old_tails|
  if old_tails.empty?
    expected_mounts = persistent_mounts
  else
    assert_not_nil($remembered_persistence_mounts)
    expected_mounts = $remembered_persistence_mounts
  end
  expected_mounts.each do |_, dir|
    assert($vm.execute("test -e #{dir}/XXX_persist").success?,
           "Could not find expected file in persistent directory #{dir}")
    assert(!$vm.execute("test -e #{dir}/XXX_gone").success?,
           "Found file that should not have persisted in persistent directory #{dir}")
  end
end

Then /^the expected persistent dotfile is present in the filesystem$/ do
  expected_dirs = persistent_dirs
  assert($vm.execute("test -L #{expected_dirs['dotfiles']}/.XXX_persist").success?,
         "Could not find expected persistent dotfile link.")
  assert($vm.execute("test -e $(readlink -f #{expected_dirs['dotfiles']}/.XXX_persist)").success?,
           "Could not find expected persistent dotfile link target.")
end

Then /^only the expected files are present on the persistence partition on USB drive "([^"]+)"$/ do |name|
  assert(!$vm.is_running?)
  disk = {
    :path => $vm.storage.disk_path(name),
    :opts => {
      :format => $vm.storage.disk_format(name),
      :readonly => true
    }
  }
  $vm.storage.guestfs_disk_helper(disk) do |g, disk_handle|
    partitions = g.part_list(disk_handle).map do |part_desc|
      disk_handle + part_desc["part_num"].to_s
    end
    partition = partitions.find do |part|
      g.blkid(part)["PART_ENTRY_NAME"] == "TailsData"
    end
    assert_not_nil(partition, "Could not find the 'TailsData' partition " \
                              "on disk '#{disk_handle}'")
    luks_mapping = File.basename(partition) + "_unlocked"
    g.luks_open(partition, @persistence_password, luks_mapping)
    luks_dev = "/dev/mapper/#{luks_mapping}"
    mount_point = "/"
    g.mount(luks_dev, mount_point)
    assert_not_nil($remembered_persistence_mounts)
    $remembered_persistence_mounts.each do |dir, _|
      # Guestfs::exists may have a bug; if the file exists, 1 is
      # returned, but if it doesn't exist false is returned. It seems
      # the translation of C types into Ruby types is glitchy.
      assert(g.exists("/#{dir}/XXX_persist") == 1,
             "Could not find expected file in persistent directory #{dir}")
      assert(g.exists("/#{dir}/XXX_gone") != 1,
             "Found file that should not have persisted in persistent directory #{dir}")
    end
    g.umount(mount_point)
    g.luks_close(luks_dev)
  end
end

When /^I delete the persistent partition$/ do
  step 'I start "Delete persistent volume" via GNOME Activities Overview'
  @screen.wait("PersistenceWizardDeletionStart.png", 120)
  @screen.type(" ")
  @screen.wait("PersistenceWizardDone.png", 120)
end

Then /^Tails has started in UEFI mode$/ do
  assert($vm.execute("test -d /sys/firmware/efi").success?,
         "/sys/firmware/efi does not exist")
 end

Given /^I create a ([[:alpha:]]+) label on disk "([^"]+)"$/ do |type, name|
  $vm.storage.disk_mklabel(name, type)
end

Given /^the file system changes introduced in version (.+) are (not )?present(?: in the (\S+) Browser's chroot)?$/ do |version, not_present, chroot_browser|
  assert_equal('1.1~test', version)
  upgrade_applied = not_present.nil?
  chroot_browser = "#{chroot_browser.downcase}-browser" if chroot_browser
  changes = [
    {
      filesystem: :rootfs,
      path: 'some_new_file',
      status: :added,
      new_content: <<-EOF
Some content
      EOF
    },
    {
      filesystem: :rootfs,
      path: 'etc/amnesia/version',
      status: :modified,
      new_content: <<-EOF
#{version} - 20380119
ffffffffffffffffffffffffffffffffffffffff
live-build: 3.0.5+really+is+2.0.12-0.tails2
live-boot: 4.0.2-1
live-config: 4.0.4-1
      EOF
    },
    {
      filesystem: :rootfs,
      path: 'etc/os-release',
      status: :modified,
      new_content: <<-EOF
TAILS_PRODUCT_NAME="Tails"
TAILS_VERSION_ID="#{version}"
      EOF
    },
    {
      filesystem: :rootfs,
      path: 'usr/share/common-licenses/BSD',
      status: :removed
    },
    {
      filesystem: :medium,
      path: 'utils/linux/syslinux',
      status: :removed
    },
  ]
  changes.each do |change|
    case change[:filesystem]
    when :rootfs
      path = '/'
      path += "var/lib/#{chroot_browser}/chroot/" if chroot_browser
      path += change[:path]
    when :medium
      path = '/lib/live/mount/medium/' + change[:path]
    else
      raise "Unknown filesysten '#{change[:filesystem]}'"
    end
    case change[:status]
    when :removed
      assert_equal(!upgrade_applied, $vm.file_exist?(path))
    when :added
      assert_equal(upgrade_applied, $vm.file_exist?(path))
      if upgrade_applied && change[:new_content]
        assert_equal(change[:new_content], $vm.file_content(path))
      end
    when :modified
      assert($vm.file_exist?(path))
      if upgrade_applied
        assert_not_nil(change[:new_content])
        assert_equal(change[:new_content], $vm.file_content(path))
      end
    else
      raise "Unknown status '#{change[:status]}'"
    end
  end
end

Then /^I am proposed to install an incremental upgrade to version (.+)$/ do |version|
  recovery_proc = Proc.new do
    recover_from_upgrader_failure
  end
  failure_pic = 'TailsUpgraderFailure.png'
  success_pic = "TailsUpgraderUpgradeTo#{version}.png"
  retry_tor(recovery_proc) do
    match, _ = @screen.waitAny([success_pic, failure_pic], 2*60)
    assert_equal(success_pic, match)
  end
end

When /^I agree to install the incremental upgrade$/ do
  @screen.click('TailsUpgraderUpgradeNowButton.png')
end

Then /^I can successfully install the incremental upgrade to version (.+)$/ do |version|
  step 'I agree to install the incremental upgrade'
  recovery_proc = Proc.new do
    recover_from_upgrader_failure
    step "I am proposed to install an incremental upgrade to version #{version}"
    step 'I agree to install the incremental upgrade'
  end
  failure_pic = 'TailsUpgraderFailure.png'
  success_pic = 'TailsUpgraderDownloadComplete.png'
  retry_tor(recovery_proc) do
    match, _ = @screen.waitAny([success_pic, failure_pic], 2*60)
    assert_equal(success_pic, match)
  end
  @screen.click('TailsUpgraderApplyUpgradeButton.png')
  @screen.wait('TailsUpgraderApplyingUpgrade.png', 20)
  @screen.wait('TailsUpgraderDone.png', 60)
end

Then /^the label of the system partition on "([^"]+)" is "([^"]+)"$/ do |name, label|
  assert($vm.is_running?)
  disk_dev = $vm.disk_dev(name)
  part_dev = disk_dev + "1"
  check_disk_integrity(name, disk_dev, "gpt")
  check_part_integrity(name, part_dev, "filesystem", "vfat", label)
end

Then /^the system partition on "([^"]+)" is an EFI system partition$/ do |name|
  assert($vm.is_running?)
  disk_dev = $vm.disk_dev(name)
  part_dev = disk_dev + "1"
  check_disk_integrity(name, disk_dev, "gpt")
  check_part_integrity(name, part_dev, "filesystem", "vfat", nil,
                       # EFI System Partition
                       'c12a7328-f81f-11d2-ba4b-00a0c93ec93b')
end

Then /^the FAT filesystem on the system partition on "([^"]+)" is at least (\d+)(.+) large$/ do |name, size, unit|
  # Let's use bytes all the way:
  wanted_size = convert_to_bytes(size.to_i, unit)

  disk_dev = $vm.disk_dev(name)
  part_dev = disk_dev + "1"

  udisks_info = $vm.execute_successfully("udisksctl info --block-device #{part_dev}").stdout
  partition_size = parse_udisksctl_info(udisks_info)['org.freedesktop.UDisks2.Partition']['Size'].to_i

  # Partition size:
  assert(partition_size >= wanted_size,
         "FAT partition is too small: #{partition_size} is less than #{wanted_size}")

  # -B 1 forces size to be expressed in bytes rather than (1K) blocks:
  fs_size = $vm.execute_successfully(
    "df --output=size -B 1 '/lib/live/mount/medium'"
  ).stdout.split("\n")[1].to_i
  assert(fs_size >= wanted_size,
         "FAT filesystem is too small: #{fs_size} is less than #{wanted_size}")
end

Then /^the UUID of the FAT filesystem on the system partition on "([^"]+)" was randomized$/ do |name|
  disk_dev = $vm.disk_dev(name)
  part_dev = disk_dev + "1"

  # Get the UUID from the block area:
  udisks_info = $vm.execute_successfully("udisksctl info --block-device #{part_dev}").stdout
  fs_uuid = parse_udisksctl_info(udisks_info)['org.freedesktop.UDisks2.Block']['IdUUID']

  static_uuid = 'A690-20D2'
  assert(fs_uuid != static_uuid,
         "FS UUID on #{name} wasn't randomized, it's still: #{fs_uuid}")
end

Then /^the label of the FAT filesystem on the system partition on "([^"]+)" is "([^"]+)"$/ do |name, label|
  disk_dev = $vm.disk_dev(name)
  part_dev = disk_dev + "1"

  # Get FS label from the block area:
  udisks_info = $vm.execute_successfully("udisksctl info --block-device #{part_dev}").stdout
  fs_label = parse_udisksctl_info(udisks_info)['org.freedesktop.UDisks2.Block']['IdLabel']

  assert(label == fs_label,
         "FS label on #{part_dev} is #{fs_label} instead of the expected #{label}")
end

Then /^the system partition on "([^"]+)" has the expected flags$/ do |name|
  disk_dev = $vm.disk_dev(name)
  part_dev = disk_dev + "1"

  # Look at the flags from the partition area:
  udisks_info = $vm.execute_successfully("udisksctl info --block-device #{part_dev}").stdout
  flags = parse_udisksctl_info(udisks_info)['org.freedesktop.UDisks2.Partition']['Flags']

  # See SYSTEM_PARTITION_FLAGS in create-usb-image-from-iso: 0xd000000000000005,
  # displayed in decimal (14987979559889010693) in udisksctl's output:
  expected_flags = 0xd000000000000005
  assert(flags == expected_flags.to_s,
         "Got #{flags} as partition flags on #{part_dev} (for #{name}), instead of the expected #{expected_flags}")
end