1 files changed, 36 insertions, 0 deletions
diff --git a/spec/controllers/jwks_controller_spec.rb b/spec/controllers/jwks_controller_spec.rb
new file mode 100644
index 00000000000..013ec01eba2
--- /dev/null
+++ b/spec/controllers/jwks_controller_spec.rb
@@ -0,0 +1,36 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe JwksController do
+  describe 'GET #index' do
+    let(:ci_jwt_signing_key) { OpenSSL::PKey::RSA.generate(1024) }
+    let(:ci_jwk) { ci_jwt_signing_key.to_jwk }
+    let(:oidc_jwk) { OpenSSL::PKey::RSA.new(Rails.application.secrets.openid_connect_signing_key).to_jwk }
+
+    before do
+      stub_application_setting(ci_jwt_signing_key: ci_jwt_signing_key.to_s)
+    end
+
+    it 'returns signing keys used to sign CI_JOB_JWT' do
+      get :index
+
+      expect(response).to have_gitlab_http_status(:ok)
+
+      ids = json_response['keys'].map { |jwk| jwk['kid'] }
+      expect(ids).to contain_exactly(ci_jwk['kid'], oidc_jwk['kid'])
+    end
+
+    it 'does not leak private key data' do
+      get :index
+
+      aggregate_failures do
+        json_response['keys'].each do |jwk|
+          expect(jwk.keys).to contain_exactly('kty', 'kid', 'e', 'n', 'use', 'alg')
+          expect(jwk['use']).to eq('sig')
+          expect(jwk['alg']).to eq('RS256')
+        end
+      end
+    end
+  end
+end