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
|
# frozen_string_literal: true
module Auth
class ContainerRegistryAuthenticationService < BaseService
AUDIENCE = 'container_registry'
REGISTRY_LOGIN_ABILITIES = [
:read_container_image,
:create_container_image,
:destroy_container_image,
:update_container_image,
:admin_container_image,
:build_read_container_image,
:build_create_container_image,
:build_destroy_container_image
].freeze
def execute(authentication_abilities:)
@authentication_abilities = authentication_abilities
return error('UNAVAILABLE', status: 404, message: 'registry not enabled') unless registry.enabled
return error('DENIED', status: 403, message: 'access forbidden') unless has_registry_ability?
unless scopes.any? || current_user || project
return error('DENIED', status: 403, message: 'access forbidden')
end
{ token: authorized_token(*scopes).encoded }
end
def self.full_access_token(*names)
access_token(%w(*), names)
end
def self.pull_access_token(*names)
access_token(['pull'], names)
end
def self.access_token(actions, names)
names = names.flatten
registry = Gitlab.config.registry
token = JSONWebToken::RSAToken.new(registry.key)
token.issuer = registry.issuer
token.audience = AUDIENCE
token.expire_time = token_expire_at
token[:access] = names.map do |name|
{ type: 'repository', name: name, actions: actions }
end
token.encoded
end
def self.token_expire_at
Time.current + Gitlab::CurrentSettings.container_registry_token_expire_delay.minutes
end
private
def authorized_token(*accesses)
JSONWebToken::RSAToken.new(registry.key).tap do |token|
token.issuer = registry.issuer
token.audience = params[:service]
token.subject = current_user.try(:username)
token.expire_time = self.class.token_expire_at
token[:access] = accesses.compact
end
end
def scopes
return [] unless params[:scopes]
@scopes ||= params[:scopes].map do |scope|
process_scope(scope)
end.compact
end
def process_scope(scope)
type, name, actions = scope.split(':', 3)
actions = actions.split(',')
case type
when 'registry'
process_registry_access(type, name, actions)
when 'repository'
path = ContainerRegistry::Path.new(name)
process_repository_access(type, path, actions)
end
end
def process_registry_access(type, name, actions)
return unless current_user&.admin?
return unless name == 'catalog'
return unless actions == ['*']
{ type: type, name: name, actions: ['*'] }
end
def process_repository_access(type, path, actions)
return unless path.valid?
requested_project = path.repository_project
return unless requested_project
authorized_actions = actions.select do |action|
can_access?(requested_project, action)
end
log_if_actions_denied(type, requested_project, actions, authorized_actions)
return unless authorized_actions.present?
# At this point user/build is already authenticated.
#
ensure_container_repository!(path, authorized_actions)
{ type: type, name: path.to_s, actions: authorized_actions }
end
##
# Because we do not have two way communication with registry yet,
# we create a container repository image resource when push to the
# registry is successfully authorized.
#
def ensure_container_repository!(path, actions)
return if path.has_repository?
return unless actions.include?('push')
ContainerRepository.create_from_path!(path)
end
def can_access?(requested_project, requested_action)
return false unless requested_project.container_registry_enabled?
case requested_action
when 'pull'
build_can_pull?(requested_project) || user_can_pull?(requested_project) || deploy_token_can_pull?(requested_project)
when 'push'
build_can_push?(requested_project) || user_can_push?(requested_project) || deploy_token_can_push?(requested_project)
when 'delete'
build_can_delete?(requested_project) || user_can_admin?(requested_project)
when '*'
user_can_admin?(requested_project)
else
false
end
end
def build_can_delete?(requested_project)
# Build can delete only from the project from which it originates
has_authentication_ability?(:build_destroy_container_image) &&
requested_project == project
end
def registry
Gitlab.config.registry
end
def can_user?(ability, project)
user = current_user.is_a?(User) ? current_user : nil
can?(user, ability, project)
end
def build_can_pull?(requested_project)
# Build can:
# 1. pull from its own project (for ex. a build)
# 2. read images from dependent projects if creator of build is a team member
has_authentication_ability?(:build_read_container_image) &&
(requested_project == project || can_user?(:build_read_container_image, requested_project))
end
def user_can_admin?(requested_project)
has_authentication_ability?(:admin_container_image) &&
can_user?(:admin_container_image, requested_project)
end
def user_can_pull?(requested_project)
has_authentication_ability?(:read_container_image) &&
can_user?(:read_container_image, requested_project)
end
def deploy_token_can_pull?(requested_project)
has_authentication_ability?(:read_container_image) &&
current_user.is_a?(DeployToken) &&
current_user.has_access_to?(requested_project) &&
current_user.read_registry?
end
def deploy_token_can_push?(requested_project)
has_authentication_ability?(:create_container_image) &&
current_user.is_a?(DeployToken) &&
current_user.has_access_to?(requested_project) &&
current_user.write_registry?
end
##
# We still support legacy pipeline triggers which do not have associated
# actor. New permissions model and new triggers are always associated with
# an actor. So this should be improved once
# https://gitlab.com/gitlab-org/gitlab-foss/issues/37452 is resolved.
#
def build_can_push?(requested_project)
# Build can push only to the project from which it originates
has_authentication_ability?(:build_create_container_image) &&
requested_project == project
end
def user_can_push?(requested_project)
has_authentication_ability?(:create_container_image) &&
can_user?(:create_container_image, requested_project)
end
def error(code, status:, message: '')
{ errors: [{ code: code, message: message }], http_status: status }
end
def has_authentication_ability?(capability)
@authentication_abilities.to_a.include?(capability)
end
def has_registry_ability?
@authentication_abilities.any? do |ability|
REGISTRY_LOGIN_ABILITIES.include?(ability)
end
end
def log_if_actions_denied(type, requested_project, requested_actions, authorized_actions)
return if requested_actions == authorized_actions
log_info = {
message: "Denied container registry permissions",
scope_type: type,
requested_project_path: requested_project.full_path,
requested_actions: requested_actions,
authorized_actions: authorized_actions,
username: current_user&.username,
user_id: current_user&.id,
project_path: project&.full_path
}.compact
Gitlab::AuthLogger.warn(log_info)
end
end
end
|