Use Auth::ContainerRegistryAuthenticationService

1 files changed, 69 insertions, 0 deletions

diff --git a/app/services/auth/container_registry_authentication_service.rb b/app/services/auth/container_registry_authentication_service.rb
new file mode 100644
index 00000000000..0323a42b697
--- /dev/null
+++ b/app/services/auth/container_registry_authentication_service.rb
@@ -0,0 +1,69 @@
+module Auth
+  class ContainerRegistryAuthenticationService < BaseService
+    def execute
+      if params[:offline_token]
+        return error('forbidden', 403) unless current_user
+      end
+
+      return error('forbidden', 401) if scopes.blank?
+
+      { token: authorized_token(scopes).encoded }
+    end
+
+    private
+
+    def authorized_token(access)
+      token = ::JWT::RSAToken.new(registry.key)
+      token.issuer = registry.issuer
+      token.audience = params[:service]
+      token.subject = current_user.try(:username)
+      token[:access] = access
+      token
+    end
+
+    def scopes
+      return unless params[:scope]
+
+      @scopes ||= begin
+        scope = process_scope(params[:scope])
+        [scope].compact
+      end
+    end
+
+    def process_scope(scope)
+      type, name, actions = scope.split(':', 3)
+      actions = actions.split(',')
+
+      case type
+      when 'repository'
+        process_repository_access(type, name, actions)
+      end
+    end
+
+    def process_repository_access(type, name, actions)
+      requested_project = Project.find_with_namespace(name)
+      return unless requested_project
+
+      actions = actions.select do |action|
+        can_access?(requested_project, action)
+      end
+
+      { type: type, name: name, actions: actions } if actions.present?
+    end
+
+    def can_access?(requested_project, requested_action)
+      case requested_action
+      when 'pull'
+        requested_project.public? || requested_project == project || can?(current_user, :read_container_registry, requested_project)
+      when 'push'
+        requested_project == project || can?(current_user, :create_container_registry, requested_project)
+      else
+        false
+      end
+    end
+
+    def registry
+      Gitlab.config.registry
+    end
+  end
+end