Prevent deploy keys from pushing code to an archived project

Merge branch 'security-prevent-deploy-key-pushing-to-archived-project-17-4' into '17-4-stable-ee'

See merge request gitlab-org/security/gitlab!4486

Changelog: security

lib/gitlab/git_access.rb

@@ -29,6 +29,7 @@ class GitAccess
       upload_pack_disabled_over_http: 'Pulling over HTTP is not allowed.',
       receive_pack_disabled_over_http: 'Pushing over HTTP is not allowed.',
       read_only: 'The repository is temporarily read-only. Please try again later.',
+      archived: "You can't push code to an archived project.",
       cannot_push_to_read_only: "You can't push code to a read-only GitLab instance.",
       push_code: 'You are not allowed to push code to this project.'
     }.freeze
@@ -341,6 +342,10 @@ def check_push_access!
         raise ForbiddenError, error_message(:read_only)
       end
+      if project&.archived?
+        raise ForbiddenError, error_message(:archived)
+      end
+
       if deploy_key?
         unless deploy_key.can_push_to?(project)
           raise ForbiddenError, error_message(:deploy_key_upload)

spec/lib/gitlab/git_access_spec.rb

@@ -1127,6 +1127,16 @@ def self.run_permission_checks(permissions_matrix)
     end
   end
+  context 'when the project is archived' do
+    let(:project) { create(:project, :repository, :archived) }
+
+    it 'denies push access' do
+      project.add_maintainer(user)
+
+      expect { push_access_check }.to raise_forbidden(described_class::ERROR_MESSAGES[:archived])
+    end
+  end
+
   describe 'deploy key permissions' do
     let(:key) { create(:deploy_key, user: user) }
     let(:actor) { key }
@@ -1138,6 +1148,14 @@ def self.run_permission_checks(permissions_matrix)
         end
         it { expect { push_access_check }.not_to raise_error }
+
+        context 'when project is archived' do
+          before do
+            project.update!(archived: true)
+          end
+
+          it { expect { push_access_check }.to raise_forbidden(described_class::ERROR_MESSAGES[:archived]) }
+        end
       end
       context 'when unauthorized' do