mirror of
https://github.com/balena-os/balena-supervisor.git
synced 2024-12-26 08:51:06 +00:00
479 lines
13 KiB
TypeScript
479 lines
13 KiB
TypeScript
import _ = require('lodash');
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import { expect } from 'chai';
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import * as Docker from 'dockerode';
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import { docker } from '../src/lib/docker-utils';
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import * as sinon from 'sinon';
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import * as config from '../src/config';
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import * as firewall from '../src/lib/firewall';
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import * as logger from '../src/logger';
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import * as iptablesMock from './lib/mocked-iptables';
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import * as targetStateCache from '../src/device-state/target-state-cache';
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import constants = require('../src/lib/constants');
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import { RuleAction, Rule } from '../src/lib/iptables';
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import { log } from '../src/lib/supervisor-console';
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describe('Host Firewall', function () {
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const dockerStubs: Dictionary<sinon.SinonStub> = {};
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let loggerSpy: sinon.SinonSpy;
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let logSpy: sinon.SinonSpy;
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let apiEndpoint: string;
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let listenPort: number;
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before(async () => {
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// spy the logs...
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loggerSpy = sinon.spy(logger, 'logSystemMessage');
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logSpy = sinon.spy(log, 'error');
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// stub the docker calls...
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dockerStubs.listContainers = sinon
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.stub(docker, 'listContainers')
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.resolves([]);
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dockerStubs.listImages = sinon.stub(docker, 'listImages').resolves([]);
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dockerStubs.getImage = sinon.stub(docker, 'getImage').returns({
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id: 'abcde',
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inspect: async () => {
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return {};
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},
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} as Docker.Image);
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await targetStateCache.initialized;
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await firewall.initialised;
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apiEndpoint = await config.get('apiEndpoint');
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listenPort = await config.get('listenPort');
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});
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after(async () => {
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for (const stub of _.values(dockerStubs)) {
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stub.restore();
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}
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loggerSpy.restore();
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logSpy.restore();
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});
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describe('Basic On/Off operation', () => {
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it('should confirm the `changed` event is handled', async function () {
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await iptablesMock.whilstMocked(async ({ hasAppliedRules }) => {
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const changedSpy = sinon.spy();
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config.on('change', changedSpy);
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// set the firewall to be in off mode...
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await config.set({ firewallMode: 'off' });
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await hasAppliedRules;
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// check it fired the events correctly...
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expect(changedSpy.called).to.be.true;
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expect(changedSpy.calledWith({ firewallMode: 'off' })).to.be.true;
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});
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});
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it('should handle the HOST_FIREWALL_MODE configuration value: invalid', async function () {
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await iptablesMock.whilstMocked(
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async ({ hasAppliedRules, expectRule }) => {
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// set the firewall to be in off mode...
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await config.set({ firewallMode: 'invalid' });
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await hasAppliedRules;
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// expect that we jump to the firewall chain...
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expectRule({
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target: 'BALENA-FIREWALL',
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chain: 'INPUT',
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family: 4,
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});
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// expect to return...
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expectRule({
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chain: 'BALENA-FIREWALL',
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target: 'RETURN',
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family: 4,
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});
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},
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);
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});
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it('should respect the HOST_FIREWALL_MODE configuration value: off', async function () {
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await iptablesMock.whilstMocked(
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async ({ hasAppliedRules, expectRule }) => {
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// set the firewall to be in off mode...
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await config.set({ firewallMode: 'off' });
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await hasAppliedRules;
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// expect that we jump to the firewall chain...
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expectRule({
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action: RuleAction.Append,
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target: 'BALENA-FIREWALL',
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chain: 'INPUT',
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family: 4,
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});
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// expect to return...
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const returnRuleIdx = expectRule({
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table: 'filter',
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chain: 'BALENA-FIREWALL',
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target: 'RETURN',
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family: 4,
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});
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// ... just before we reject everything
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const rejectRuleIdx = expectRule({
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chain: 'BALENA-FIREWALL',
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target: 'REJECT',
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matches: iptablesMock.RuleProperty.NotSet,
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family: 4,
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});
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expect(returnRuleIdx).to.be.lessThan(rejectRuleIdx);
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},
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);
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});
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it('should respect the HOST_FIREWALL_MODE configuration value: on', async function () {
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await iptablesMock.whilstMocked(
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async ({ hasAppliedRules, expectRule, expectNoRule }) => {
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// set the firewall to be in auto mode...
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await config.set({ firewallMode: 'on' });
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await hasAppliedRules;
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// expect that we jump to the firewall chain...
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expectRule({
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action: RuleAction.Append,
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target: 'BALENA-FIREWALL',
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chain: 'INPUT',
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family: 4,
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});
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// expect to not return for any reason...
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expectNoRule({
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chain: 'BALENA-FIREWALL',
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target: 'RETURN',
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});
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},
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);
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});
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it('should respect the HOST_FIREWALL_MODE configuration value: auto (no services in host-network)', async function () {
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await iptablesMock.whilstMocked(
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async ({ hasAppliedRules, expectRule }) => {
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await targetStateCache.setTargetApps([
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{
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appId: 2,
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commit: 'abcdef2',
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name: 'test-app2',
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source: apiEndpoint,
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releaseId: 1232,
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services: JSON.stringify([
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{
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serviceName: 'test-service',
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image: 'test-image',
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imageId: 5,
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environment: {
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TEST_VAR: 'test-string',
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},
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tty: true,
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appId: 2,
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releaseId: 1232,
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serviceId: 567,
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commit: 'abcdef2',
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},
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]),
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networks: '[]',
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volumes: '[]',
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},
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]);
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// set the firewall to be in auto mode...
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await config.set({ firewallMode: 'auto' });
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await hasAppliedRules;
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// expect that we jump to the firewall chain...
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expectRule({
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action: RuleAction.Append,
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target: 'BALENA-FIREWALL',
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chain: 'INPUT',
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family: 4,
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});
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// expect to return...
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expectRule({
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chain: 'BALENA-FIREWALL',
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target: 'RETURN',
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family: 4,
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});
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},
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);
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});
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it('should respect the HOST_FIREWALL_MODE configuration value: auto (service in host-network)', async function () {
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await iptablesMock.whilstMocked(
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async ({ hasAppliedRules, expectRule, expectNoRule }) => {
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await targetStateCache.setTargetApps([
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{
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appId: 2,
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commit: 'abcdef2',
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name: 'test-app2',
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source: apiEndpoint,
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releaseId: 1232,
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services: JSON.stringify([
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{
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serviceName: 'test-service',
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networkMode: 'host',
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image: 'test-image',
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imageId: 5,
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environment: {
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TEST_VAR: 'test-string',
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},
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tty: true,
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appId: 2,
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releaseId: 1232,
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serviceId: 567,
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commit: 'abcdef2',
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},
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]),
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networks: '[]',
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volumes: '[]',
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},
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]);
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// set the firewall to be in auto mode...
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await config.set({ firewallMode: 'auto' });
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await hasAppliedRules;
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// expect that we jump to the firewall chain...
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expectRule({
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action: RuleAction.Append,
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target: 'BALENA-FIREWALL',
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chain: 'INPUT',
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family: 4,
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});
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// expect to return...
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expectNoRule({
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chain: 'BALENA-FIREWALL',
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target: 'RETURN',
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family: 4,
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});
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},
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);
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});
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it('should catch errors when rule changes fail', async () => {
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await iptablesMock.whilstMocked(async ({ hasAppliedRules }) => {
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// clear the spies...
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loggerSpy.resetHistory();
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logSpy.resetHistory();
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// set the firewall to be in off mode...
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await config.set({ firewallMode: 'off' });
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await hasAppliedRules;
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// should have caught the error and logged it
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expect(logSpy.calledWith('Error applying firewall mode')).to.be.true;
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expect(loggerSpy.called).to.be.true;
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}, iptablesMock.realRuleAdaptor);
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});
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});
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describe('Service rules', () => {
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const rejectAllRule = {
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target: 'REJECT',
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chain: 'BALENA-FIREWALL',
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matches: iptablesMock.RuleProperty.NotSet,
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};
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const checkForRules = (
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rules: Array<iptablesMock.Testable<Rule>> | iptablesMock.Testable<Rule>,
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expectRule: (rule: iptablesMock.Testable<Rule>) => number,
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) => {
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rules = _.castArray(rules);
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rules.forEach((rule) => {
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const ruleIdx = expectRule(rule);
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// make sure we reject AFTER the rule...
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const rejectAllRuleIdx = expectRule(rejectAllRule);
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expect(ruleIdx).is.lessThan(rejectAllRuleIdx);
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});
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};
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it('should have a rule to allow DNS traffic from the balena0 interface', async () => {
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await iptablesMock.whilstMocked(
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async ({ hasAppliedRules, expectRule }) => {
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// set the firewall to be on...
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await config.set({ firewallMode: 'on' });
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await hasAppliedRules;
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[4, 6].forEach((family: 4 | 6) => {
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// expect that we have a rule to allow DNS access...
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checkForRules(
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{
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family,
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target: 'ACCEPT',
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chain: 'BALENA-FIREWALL',
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proto: 'udp',
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matches: ['--dport 53', '-i balena0'],
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},
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expectRule,
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);
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});
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},
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);
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});
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it('should have a rule to allow SSH traffic any interface', async () => {
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await iptablesMock.whilstMocked(
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async ({ hasAppliedRules, expectRule }) => {
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// set the firewall to be on...
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await config.set({ firewallMode: 'on' });
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await hasAppliedRules;
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[4, 6].forEach((family: 4 | 6) => {
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// expect that we have a rule to allow SSH access...
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checkForRules(
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{
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family,
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target: 'ACCEPT',
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chain: 'BALENA-FIREWALL',
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proto: 'tcp',
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matches: ['--dport 22222'],
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},
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expectRule,
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);
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});
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},
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);
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});
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it('should have a rule to allow Multicast traffic any interface', async () => {
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await iptablesMock.whilstMocked(
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async ({ hasAppliedRules, expectRule }) => {
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// set the firewall to be on...
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await config.set({ firewallMode: 'on' });
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await hasAppliedRules;
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[4, 6].forEach((family: 4 | 6) => {
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// expect that we have a rule to allow multicast...
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checkForRules(
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{
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family,
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target: 'ACCEPT',
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chain: 'BALENA-FIREWALL',
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matches: ['-m addrtype', '--dst-type MULTICAST'],
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},
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expectRule,
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);
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});
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},
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);
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});
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it('should have a rule to allow balenaEngine traffic any interface', async () => {
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await iptablesMock.whilstMocked(
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async ({ hasAppliedRules, expectRule }) => {
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// set the firewall to be on...
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await config.set({ firewallMode: 'on' });
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await hasAppliedRules;
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[4, 6].forEach((family: 4 | 6) => {
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// expect that we have a rule to allow balenaEngine access...
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checkForRules(
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{
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family,
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target: 'ACCEPT',
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chain: 'BALENA-FIREWALL',
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proto: 'tcp',
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matches: ['--dport 2375'],
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},
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expectRule,
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);
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});
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},
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);
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});
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});
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describe('Supervisor API access', () => {
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it('should allow access in localmode', async function () {
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await iptablesMock.whilstMocked(
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async ({ hasAppliedRules, expectRule }) => {
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// set the device to be in local mode...
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await config.set({ localMode: true });
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await hasAppliedRules;
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[4, 6].forEach((family: 4 | 6) => {
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// make sure we have a rule to allow traffic on ANY interface
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const allowRuleIdx = expectRule({
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proto: 'tcp',
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matches: [`--dport ${listenPort}`],
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target: 'ACCEPT',
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chain: 'BALENA-FIREWALL',
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table: 'filter',
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family,
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});
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// make sure we have a rule to block traffic on ANY interface also
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const rejectRuleIdx = expectRule({
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proto: 'tcp',
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matches: [`--dport ${listenPort}`],
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target: 'REJECT',
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chain: 'BALENA-FIREWALL',
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table: 'filter',
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family,
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});
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// we should always reject AFTER we allow
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expect(allowRuleIdx).to.be.lessThan(rejectRuleIdx);
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});
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},
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);
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});
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it('should allow limited access in non-localmode', async function () {
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await iptablesMock.whilstMocked(
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async ({ hasAppliedRules, expectRule, expectNoRule }) => {
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// set the device to be in local mode...
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await config.set({ localMode: false });
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await hasAppliedRules;
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// ensure we have no unrestricted rule...
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expectNoRule({
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chain: 'BALENA-FIREWALL',
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proto: 'tcp',
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matches: [`--dport ${listenPort}`],
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target: 'ACCEPT',
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family: 4,
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});
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// ensure we do have a restricted rule for each interface...
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let allowRuleIdx = -1;
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constants.allowedInterfaces.forEach((intf) => {
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[4, 6].forEach((family: 4 | 6) => {
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allowRuleIdx = expectRule({
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chain: 'BALENA-FIREWALL',
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proto: 'tcp',
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matches: [`--dport ${listenPort}`, `-i ${intf}`],
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target: 'ACCEPT',
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family,
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});
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});
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});
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// make sure we have a rule to block traffic on ANY interface also
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const rejectRuleIdx = expectRule({
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proto: 'tcp',
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matches: [`--dport ${listenPort}`],
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target: 'REJECT',
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chain: 'BALENA-FIREWALL',
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table: 'filter',
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});
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// we should always reject AFTER we allow
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expect(allowRuleIdx).to.be.lessThan(rejectRuleIdx);
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},
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);
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});
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});
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});
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