summaryrefslogtreecommitdiff
path: root/app/models/ability.rb
blob: 6fd18f2ee24bd0dea3b42d0aff4c9317eeac8534 (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
class Ability
  class << self
    # rubocop: disable Metrics/CyclomaticComplexity
    def allowed(user, subject)
      return anonymous_abilities(user, subject) if user.nil?
      return [] unless user.is_a?(User)
      return [] if user.blocked?

      case subject
      when CommitStatus then commit_status_abilities(user, subject)
      when Project then project_abilities(user, subject)
      when Issue then issue_abilities(user, subject)
      when Note then note_abilities(user, subject)
      when ProjectSnippet then project_snippet_abilities(user, subject)
      when PersonalSnippet then personal_snippet_abilities(user, subject)
      when MergeRequest then merge_request_abilities(user, subject)
      when Group then group_abilities(user, subject)
      when Namespace then namespace_abilities(user, subject)
      when GroupMember then group_member_abilities(user, subject)
      when ProjectMember then project_member_abilities(user, subject)
      when User then user_abilities
      when ExternalIssue, Deployment, Environment then project_abilities(user, subject.project)
      when Ci::Runner then runner_abilities(user, subject)
      else []
      end.concat(global_abilities(user))
    end

    # Given a list of users and a project this method returns the users that can
    # read the given project.
    def users_that_can_read_project(users, project)
      if project.public?
        users
      else
        users.select do |user|
          if user.admin?
            true
          elsif project.internal? && !user.external?
            true
          elsif project.owner == user
            true
          elsif project.team.members.include?(user)
            true
          else
            false
          end
        end
      end
    end

    # List of possible abilities for anonymous user
    def anonymous_abilities(user, subject)
      if subject.is_a?(PersonalSnippet)
        anonymous_personal_snippet_abilities(subject)
      elsif subject.is_a?(ProjectSnippet)
        anonymous_project_snippet_abilities(subject)
      elsif subject.is_a?(CommitStatus)
        anonymous_commit_status_abilities(subject)
      elsif subject.is_a?(Project) || subject.respond_to?(:project)
        anonymous_project_abilities(subject)
      elsif subject.is_a?(Group) || subject.respond_to?(:group)
        anonymous_group_abilities(subject)
      elsif subject.is_a?(User)
        anonymous_user_abilities
      else
        []
      end
    end

    def anonymous_project_abilities(subject)
      project = if subject.is_a?(Project)
                  subject
                else
                  subject.project
                end

      if project && project.public?
        rules = [
          :read_project,
          :read_wiki,
          :read_label,
          :read_milestone,
          :read_project_snippet,
          :read_project_member,
          :read_merge_request,
          :read_note,
          :read_pipeline,
          :read_commit_status,
          :read_container_image,
          :download_code
        ]

        # Allow to read builds by anonymous user if guests are allowed
        rules << :read_build if project.public_builds?

        # Allow to read issues by anonymous user if issue is not confidential
        rules << :read_issue unless subject.is_a?(Issue) && subject.confidential?

        rules - project_disabled_features_rules(project)
      else
        []
      end
    end

    def anonymous_commit_status_abilities(subject)
      rules = anonymous_project_abilities(subject.project)
      # If subject is Ci::Build which inherits from CommitStatus filter the abilities
      rules = filter_build_abilities(rules) if subject.is_a?(Ci::Build)
      rules
    end

    def anonymous_group_abilities(subject)
      rules = []

      group = if subject.is_a?(Group)
                subject
              else
                subject.group
              end

      rules << :read_group if group.public?

      rules
    end

    def anonymous_personal_snippet_abilities(snippet)
      if snippet.public?
        [:read_personal_snippet]
      else
        []
      end
    end

    def anonymous_project_snippet_abilities(snippet)
      if snippet.public?
        [:read_project_snippet]
      else
        []
      end
    end

    def anonymous_user_abilities
      [:read_user] unless restricted_public_level?
    end

    def global_abilities(user)
      rules = []
      rules << :create_group if user.can_create_group
      rules << :read_users_list
      rules
    end

    def project_abilities(user, project)
      rules = []
      key = "/user/#{user.id}/project/#{project.id}"

      RequestStore.store[key] ||= begin
        # Push abilities on the users team role
        rules.push(*project_team_rules(project.team, user))

        owner = user.admin? ||
                project.owner == user ||
                (project.group && project.group.has_owner?(user))

        if owner
          rules.push(*project_owner_rules)
        end

        if project.public? || (project.internal? && !user.external?)
          rules.push(*public_project_rules)

          # Allow to read builds for internal projects
          rules << :read_build if project.public_builds?

          unless owner || project.team.member?(user) || project_group_member?(project, user)
            rules << :request_access
          end
        end

        if project.archived?
          rules -= project_archived_rules
        end

        rules - project_disabled_features_rules(project)
      end
    end

    def project_team_rules(team, user)
      # Rules based on role in project
      if team.master?(user)
        project_master_rules
      elsif team.developer?(user)
        project_dev_rules
      elsif team.reporter?(user)
        project_report_rules
      elsif team.guest?(user)
        project_guest_rules
      else
        []
      end
    end

    def public_project_rules
      @public_project_rules ||= project_guest_rules + [
        :download_code,
        :fork_project,
        :read_commit_status,
        :read_pipeline,
        :read_container_image
      ]
    end

    def project_guest_rules
      @project_guest_rules ||= [
        :read_project,
        :read_wiki,
        :read_issue,
        :read_label,
        :read_milestone,
        :read_project_snippet,
        :read_project_member,
        :read_merge_request,
        :read_note,
        :create_project,
        :create_issue,
        :create_note,
        :upload_file
      ]
    end

    def project_report_rules
      @project_report_rules ||= project_guest_rules + [
        :download_code,
        :fork_project,
        :create_project_snippet,
        :update_issue,
        :admin_issue,
        :admin_label,
        :read_commit_status,
        :read_build,
        :read_container_image,
        :read_pipeline,
        :read_environment,
        :read_deployment
      ]
    end

    def project_dev_rules
      @project_dev_rules ||= project_report_rules + [
        :admin_merge_request,
        :update_merge_request,
        :create_commit_status,
        :update_commit_status,
        :create_build,
        :update_build,
        :create_pipeline,
        :update_pipeline,
        :create_merge_request,
        :create_wiki,
        :push_code,
        :create_container_image,
        :update_container_image,
        :create_environment,
        :create_deployment
      ]
    end

    def project_archived_rules
      @project_archived_rules ||= [
        :create_merge_request,
        :push_code,
        :push_code_to_protected_branches,
        :update_merge_request,
        :admin_merge_request
      ]
    end

    def project_master_rules
      @project_master_rules ||= project_dev_rules + [
        :push_code_to_protected_branches,
        :update_project_snippet,
        :update_environment,
        :update_deployment,
        :admin_milestone,
        :admin_project_snippet,
        :admin_project_member,
        :admin_merge_request,
        :admin_note,
        :admin_wiki,
        :admin_project,
        :admin_commit_status,
        :admin_build,
        :admin_container_image,
        :admin_pipeline,
        :admin_environment,
        :admin_deployment
      ]
    end

    def project_owner_rules
      @project_owner_rules ||= project_master_rules + [
        :change_namespace,
        :change_visibility_level,
        :rename_project,
        :remove_project,
        :archive_project,
        :remove_fork_project,
        :destroy_merge_request,
        :destroy_issue
      ]
    end

    def project_disabled_features_rules(project)
      rules = []

      unless project.issues_enabled
        rules += named_abilities('issue')
      end

      unless project.merge_requests_enabled
        rules += named_abilities('merge_request')
      end

      unless project.issues_enabled or project.merge_requests_enabled
        rules += named_abilities('label')
        rules += named_abilities('milestone')
      end

      unless project.snippets_enabled
        rules += named_abilities('project_snippet')
      end

      unless project.wiki_enabled
        rules += named_abilities('wiki')
      end

      unless project.builds_enabled
        rules += named_abilities('build')
        rules += named_abilities('pipeline')
        rules += named_abilities('environment')
        rules += named_abilities('deployment')
      end

      unless project.container_registry_enabled
        rules += named_abilities('container_image')
      end

      rules
    end

    def group_abilities(user, group)
      rules = []
      rules << :read_group if can_read_group?(user, group)

      owner = user.admin? || group.has_owner?(user)
      master = owner || group.has_master?(user)

      # Only group masters and group owners can create new projects
      if master
        rules += [
          :create_projects,
          :admin_milestones
        ]
      end

      # Only group owner and administrators can admin group
      if owner
        rules += [
          :admin_group,
          :admin_namespace,
          :admin_group_member,
          :change_visibility_level
        ]
      end

      if group.public? || (group.internal? && !user.external?)
        rules << :request_access unless group.users.include?(user)
      end

      rules.flatten
    end

    def can_read_group?(user, group)
      return true if user.admin?
      return true if group.public?
      return true if group.internal? && !user.external?
      return true if group.users.include?(user)

      GroupProjectsFinder.new(group).execute(user).any?
    end

    def namespace_abilities(user, namespace)
      rules = []

      # Only namespace owner and administrators can admin it
      if namespace.owner == user || user.admin?
        rules += [
          :create_projects,
          :admin_namespace
        ]
      end

      rules.flatten
    end

    [:issue, :merge_request].each do |name|
      define_method "#{name}_abilities" do |user, subject|
        rules = []

        if subject.author == user || (subject.respond_to?(:assignee) && subject.assignee == user)
          rules += [
            :"read_#{name}",
            :"update_#{name}",
          ]
        end

        rules += project_abilities(user, subject.project)
        rules = filter_confidential_issues_abilities(user, subject, rules) if subject.is_a?(Issue)
        rules
      end
    end

    def note_abilities(user, note)
      rules = []

      if note.author == user
        rules += [
          :read_note,
          :update_note,
          :admin_note
        ]
      end

      if note.respond_to?(:project) && note.project
        rules += project_abilities(user, note.project)
      end

      rules
    end

    def personal_snippet_abilities(user, snippet)
      rules = []

      if snippet.author == user
        rules += [
          :read_personal_snippet,
          :update_personal_snippet,
          :admin_personal_snippet
        ]
      end

      if snippet.public? || (snippet.internal? && !user.external?)
        rules << :read_personal_snippet
      end

      rules
    end

    def project_snippet_abilities(user, snippet)
      rules = []

      if snippet.author == user || user.admin?
        rules += [
          :read_project_snippet,
          :update_project_snippet,
          :admin_project_snippet
        ]
      end

      if snippet.public? || (snippet.internal? && !user.external?) || (snippet.private? && snippet.project.team.member?(user))
        rules << :read_project_snippet
      end

      rules
    end

    def group_member_abilities(user, subject)
      rules = []
      target_user = subject.user
      group = subject.group

      unless group.last_owner?(target_user)
        can_manage = group_abilities(user, group).include?(:admin_group_member)

        if can_manage
          rules << :update_group_member
          rules << :destroy_group_member
        elsif user == target_user
          rules << :destroy_group_member
        end
      end

      rules
    end

    def project_member_abilities(user, subject)
      rules = []
      target_user = subject.user
      project = subject.project

      unless target_user == project.owner
        can_manage = project_abilities(user, project).include?(:admin_project_member)

        if can_manage
          rules << :update_project_member
          rules << :destroy_project_member
        elsif user == target_user
          rules << :destroy_project_member
        end
      end

      rules
    end

    def commit_status_abilities(user, subject)
      rules = project_abilities(user, subject.project)
      # If subject is Ci::Build which inherits from CommitStatus filter the abilities
      rules = filter_build_abilities(rules) if subject.is_a?(Ci::Build)
      rules
    end

    def filter_build_abilities(rules)
      # If we can't read build we should also not have that
      # ability when looking at this in context of commit_status
      %w(read create update admin).each do |rule|
        rules.delete(:"#{rule}_commit_status") unless rules.include?(:"#{rule}_build")
      end
      rules
    end

    def runner_abilities(user, runner)
      if user.is_admin?
        [:assign_runner]
      elsif runner.is_shared? || runner.locked?
        []
      elsif user.ci_authorized_runners.include?(runner)
        [:assign_runner]
      else
        []
      end
    end

    def user_abilities
      [:read_user]
    end

    def abilities
      @abilities ||= begin
        abilities = Six.new
        abilities << self
        abilities
      end
    end

    private

    def restricted_public_level?
      current_application_settings.restricted_visibility_levels.include?(Gitlab::VisibilityLevel::PUBLIC)
    end

    def named_abilities(name)
      [
        :"read_#{name}",
        :"create_#{name}",
        :"update_#{name}",
        :"admin_#{name}"
      ]
    end

    def filter_confidential_issues_abilities(user, issue, rules)
      return rules if user.admin? || !issue.confidential?

      unless issue.author == user || issue.assignee == user || issue.project.team.member?(user, Gitlab::Access::REPORTER)
        rules.delete(:admin_issue)
        rules.delete(:read_issue)
        rules.delete(:update_issue)
      end

      rules
    end

    def project_group_member?(project, user)
      project.group &&
      (
        project.group.members.exists?(user_id: user.id) ||
        project.group.requesters.exists?(user_id: user.id)
      )
    end
  end
end