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test/apps/app/server/proxy.js

@@ -1,21 +1,28 @@
 const express = require('express');
 const createProxyMiddleware = require('./proxyMiddleware');
 
+// Proxy should use different (from your SPA) port or domain  to have different local/session storage.
+// SIW initially clears transaction storage, so state saved in SPA could not be readen on login callback
+//  and `handleRedirect` would produce the error:
+// AuthSdkError: Could not load PKCE codeVerifier from storage. 
+//  This may indicate the auth flow has already completed or multiple auth flows are executing concurrently.
+//
+// Okta org setup:
+// - Proxy URL should be added to Trusted Origins.
+// - `<proxy>/login/callback` should be added to Redirect URIs of app with CLIENT_ID
+
 module.exports = function createProxyApp({ proxyPort }) {
-	// Proxy should use another port or domain to have different local/session storage.
-	// SIW initially clears transaction storage, so state could not be readen on login callback.
-	// AuthSdkError: Could not load PKCE codeVerifier from storage. This may indicate the auth flow has already completed or multiple auth flows are executing concurrently.
-	const proxyApp = express();
-	const { origin } = new URL(process.env.ISSUER);
-	const proxyMiddleware = createProxyMiddleware({
-		origin,
-		proxyPort
-	});
-	proxyApp.use('/api', proxyMiddleware); // /api/v1/sessions/me
-	proxyApp.use('/oauth2', proxyMiddleware); // /oauth2/v1
-	proxyApp.use('/idp/idx', proxyMiddleware);
-	proxyApp.use('/login/token/redirect', proxyMiddleware);
-	proxyApp.use('/app', proxyMiddleware);
-	proxyApp.use('/.well-known', proxyMiddleware);
-	return proxyApp;
+  const proxyApp = express();
+  const { origin } = new URL(process.env.ISSUER);
+  const proxyMiddleware = createProxyMiddleware({
+    origin,
+    proxyPort
+  });
+  proxyApp.use('/api', proxyMiddleware); // /api/v1/sessions/me
+  proxyApp.use('/oauth2', proxyMiddleware); // /oauth2/v1
+  proxyApp.use('/idp/idx', proxyMiddleware);
+  proxyApp.use('/login/token/redirect', proxyMiddleware);
+  proxyApp.use('/app', proxyMiddleware);
+  proxyApp.use('/.well-known', proxyMiddleware);
+  return proxyApp;
 };

test/apps/app/server/proxyMiddleware.js

@@ -1,5 +1,20 @@
 const { createProxyMiddleware, responseInterceptor } = require('http-proxy-middleware');
 
+// Explanation for need of response rewrites in `onProxyRes`:
+//
+// HTML page `<proxy>/oauth2/v1/authorize` contains script with config for SIW with var `baseUrl`.
+// `baseUrl` value equals to <origin>, it is used for IDX API requests.
+// Need to replace <origin> to <proxy> in `baseUrl`.
+// Otherwise response to `<origin>/idp/idx/identify` after successful login would contain redirect URL
+//  `<origin>/login/token/redirect?stateToken=xxx` which would render HTTP 403 error.
+// The problem relates to `DT` cookie which is set on page `<proxy>/oauth2/v1/authorize`
+//  for domain <proxy>, but not <origin>.
+// Since cookie for <origin> domain can't be set from <proxy> server response (unless they are in same domain)
+//  and there is no way to configure value of `baseUrl`, it should be intercepted and replaced in a response.
+//
+// <origin> should be replaced to <proxy> in IDX API responses, but not for `/.well-known`.
+// Otherwise `handleRedirect` will produce error `AuthSdkError: The issuer [origin] does not match [proxy]`
+
 function escapeUri(str) {
   return [
     [':', '\\x3A'],
@@ -18,14 +33,17 @@ module.exports = function proxyMiddlewareFactory({ proxyPort, origin }) {
     secure: false,
     changeOrigin: true,
     selfHandleResponse: true, 
+    // eslint-disable-next-line no-unused-vars, @typescript-eslint/no-unused-vars
     onProxyRes: responseInterceptor(async (responseBuffer, proxyRes, req, res) => {
       const response = responseBuffer.toString('utf8');
       let patchedResponse = response;
-      patchedResponse = patchedResponse.replace(
-        buildRegexForUri(origin),
-        escapeUri(`http://localhost:${proxyPort}`)
-      );
-      if (!req.url.includes('/.well-known') ) {
+      if (req.url.includes('/oauth2/v1/authorize') ) {
+        patchedResponse = patchedResponse.replace(
+          buildRegexForUri(origin),
+          escapeUri(`http://localhost:${proxyPort}`)
+        );
+      }
+      if (req.url.includes('/idp/idx/') ) {
         patchedResponse = patchedResponse.replace(
           new RegExp(origin, 'g'),
           `http://localhost:${proxyPort}`

test/e2e/specs/proxy.js

@@ -13,33 +13,54 @@
 import assert from 'assert';
 import TestApp from '../pageobjects/TestApp';
 import { openPKCE } from '../util/appUtils';
-import { loginRedirect } from '../util/loginUtils';
+import { loginRedirect, loginRedirectWithSso } from '../util/loginUtils';
 import { getIssuer, getBaseUrl } from '../util/browserUtils';
 
 const proxyIssuer = getIssuer().replace(getBaseUrl(), 'http://localhost:8082');
 
-describe('E2E through proxy', () => {
-  beforeEach(async function bootstrap() {
-    await openPKCE({
-      issuer: proxyIssuer
-    });
-    await TestApp.issuer.then(el => el.getValue()).then(val => {
-      assert(val.indexOf('http://localhost') === 0);
-    });
-    await loginRedirect('pkce');
+async function bootstrap(options, openInNewWindow) {
+  await openPKCE({
+    issuer: proxyIssuer,
+    ...(options || {})
+  }, openInNewWindow);
+  await TestApp.issuer.then(el => el.getValue()).then(val => {
+    assert(val.indexOf('http://localhost') === 0);
   });
+}
 
+describe('E2E through proxy', () => {
   afterEach(async function teardown() {
     if (await TestApp.isAuthenticated()) {
       await TestApp.logoutRedirect();
     }
   });
 
   it('can login and receive tokens', async () => {
+    await bootstrap();
+    await loginRedirect('pkce');
+    await TestApp.assertLoggedIn();
+  });
+
+  it('should use SSO session', async () => {
+    // Open tab 1 and sign in
+    // Use `sessionStorage` to not share tokens between tabs
+    await bootstrap({ storage: 'sessionStorage' });
+    await loginRedirect('pkce');
+    await TestApp.assertLoggedIn();
+
+    // Open tab 2
+    // SSO session should exist, but should be not logged in to app
+    await bootstrap({ storage: 'sessionStorage' }, true);
+    await TestApp.waitForLoginBtn();
+
+    // Should be able to sign in without entering credentials
+    await loginRedirectWithSso('pkce');
     await TestApp.assertLoggedIn();
   });
 
   it('should end SSO session on logout', async () => {
+    await bootstrap();
+    await loginRedirect('pkce');
     await TestApp.assertLoggedIn();
 
     // SSO session should exist
@@ -58,6 +79,10 @@ describe('E2E through proxy', () => {
     if (!process.env.REFRESH_TOKEN) {
       return;
     }
+
+    await bootstrap();
+    await loginRedirect('pkce');
+
     const prev = {
       idToken: await TestApp.idToken.then(el => el.getText()),
       accessToken: await TestApp.accessToken.then(el => el.getText())
@@ -77,6 +102,9 @@ describe('E2E through proxy', () => {
   // TODO: is this possible?
   // eslint-disable-next-line jasmine/no-disabled-tests
   xit('can refresh all tokens using getWithoutPrompt', async () => {
+    await bootstrap();
+    await loginRedirect('pkce');
+
     const prev = {
       idToken: await TestApp.idToken.then(el => el.getText()),
       accessToken: await TestApp.accessToken.then(el => el.getText())

test/e2e/util/loginUtils.js

@@ -64,6 +64,11 @@ export async function loginRedirect(flow, responseMode) {
   return handleCallback(flow, responseMode);
 }
 
+export async function loginRedirectWithSso(flow, responseMode) {
+  await TestApp.loginRedirect();
+  return handleCallback(flow, responseMode);
+}
+
 export async function loginDirect(setCredentials = true) {
   if (setCredentials) {
     await TestApp.username.then(el => el.setValue(USERNAME));