org.apache.cxf.fediz.systests.oidc.OIDCTest.java Source code

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/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.cxf.fediz.systests.oidc;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.URL;
import java.security.KeyStore;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.security.cert.Certificate;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.Locale;
import java.util.TimeZone;

import javax.servlet.ServletException;

import com.gargoylesoftware.htmlunit.FailingHttpStatusCodeException;
import com.gargoylesoftware.htmlunit.HttpMethod;
import com.gargoylesoftware.htmlunit.UnexpectedPage;
import com.gargoylesoftware.htmlunit.WebClient;
import com.gargoylesoftware.htmlunit.WebRequest;
import com.gargoylesoftware.htmlunit.WebResponse;
import com.gargoylesoftware.htmlunit.html.DomElement;
import com.gargoylesoftware.htmlunit.html.DomNodeList;
import com.gargoylesoftware.htmlunit.html.HtmlButton;
import com.gargoylesoftware.htmlunit.html.HtmlForm;
import com.gargoylesoftware.htmlunit.html.HtmlPage;
import com.gargoylesoftware.htmlunit.html.HtmlSelect;
import com.gargoylesoftware.htmlunit.html.HtmlSubmitInput;
import com.gargoylesoftware.htmlunit.html.HtmlTable;
import com.gargoylesoftware.htmlunit.html.HtmlTextInput;
import com.gargoylesoftware.htmlunit.util.NameValuePair;
import com.gargoylesoftware.htmlunit.util.WebConnectionWrapper;

import org.apache.catalina.Context;
import org.apache.catalina.LifecycleException;
import org.apache.catalina.LifecycleState;
import org.apache.catalina.connector.Connector;
import org.apache.catalina.startup.Tomcat;
import org.apache.commons.io.IOUtils;
import org.apache.cxf.fediz.tomcat7.FederationAuthenticator;
import org.apache.cxf.rs.security.jose.jwa.SignatureAlgorithm;
import org.apache.cxf.rs.security.jose.jws.JwsJwtCompactConsumer;
import org.apache.cxf.rs.security.jose.jwt.JwtConstants;
import org.apache.cxf.rs.security.jose.jwt.JwtToken;
import org.apache.http.auth.AuthScope;
import org.apache.http.auth.UsernamePasswordCredentials;
import org.apache.wss4j.common.util.Loader;
import org.junit.AfterClass;
import org.junit.Assert;
import org.junit.BeforeClass;

/**
 * Some OIDC tests.
 */
public class OIDCTest {

    static String idpHttpsPort;
    static String rpHttpsPort;

    private static Tomcat idpServer;
    private static Tomcat rpServer;

    private static String storedClientId;
    private static String storedClient2Id;

    @BeforeClass
    public static void init() throws Exception {
        System.setProperty("org.apache.commons.logging.Log", "org.apache.commons.logging.impl.SimpleLog");
        System.setProperty("org.apache.commons.logging.simplelog.showdatetime", "true");
        System.setProperty("org.apache.commons.logging.simplelog.log.httpclient.wire", "info");
        System.setProperty("org.apache.commons.logging.simplelog.log.org.apache.commons.httpclient", "info");
        System.setProperty("org.apache.commons.logging.simplelog.log.org.springframework.webflow", "info");
        System.setProperty("org.apache.commons.logging.simplelog.log.org.springframework.security.web", "info");
        System.setProperty("org.apache.commons.logging.simplelog.log.org.apache.cxf.fediz", "info");
        System.setProperty("org.apache.commons.logging.simplelog.log.org.apache.cxf", "info");

        idpHttpsPort = System.getProperty("idp.https.port");
        Assert.assertNotNull("Property 'idp.https.port' null", idpHttpsPort);
        rpHttpsPort = System.getProperty("rp.https.port");
        Assert.assertNotNull("Property 'rp.https.port' null", rpHttpsPort);

        idpServer = startServer(true, idpHttpsPort);
        rpServer = startServer(false, rpHttpsPort);

        loginToClientsPage(rpHttpsPort, idpHttpsPort);
    }

    private static Tomcat startServer(boolean idp, String port)
            throws ServletException, LifecycleException, IOException {
        Tomcat server = new Tomcat();
        server.setPort(0);
        String currentDir = new File(".").getCanonicalPath();
        String baseDir = currentDir + File.separator + "target";
        server.setBaseDir(baseDir);

        if (idp) {
            server.getHost().setAppBase("tomcat/idp/webapps");
        } else {
            server.getHost().setAppBase("tomcat/rp/webapps");
        }
        server.getHost().setAutoDeploy(true);
        server.getHost().setDeployOnStartup(true);

        Connector httpsConnector = new Connector();
        httpsConnector.setPort(Integer.parseInt(port));
        httpsConnector.setSecure(true);
        httpsConnector.setScheme("https");
        //httpsConnector.setAttribute("keyAlias", keyAlias);
        httpsConnector.setAttribute("keystorePass", "tompass");
        httpsConnector.setAttribute("keystoreFile", "test-classes/server.jks");
        httpsConnector.setAttribute("truststorePass", "tompass");
        httpsConnector.setAttribute("truststoreFile", "test-classes/server.jks");
        httpsConnector.setAttribute("clientAuth", "want");
        // httpsConnector.setAttribute("clientAuth", "false");
        httpsConnector.setAttribute("sslProtocol", "TLS");
        httpsConnector.setAttribute("SSLEnabled", true);

        server.getService().addConnector(httpsConnector);

        if (idp) {
            File stsWebapp = new File(baseDir + File.separator + server.getHost().getAppBase(), "fediz-idp-sts");
            server.addWebapp("/fediz-idp-sts", stsWebapp.getAbsolutePath());

            File idpWebapp = new File(baseDir + File.separator + server.getHost().getAppBase(), "fediz-idp");
            server.addWebapp("/fediz-idp", idpWebapp.getAbsolutePath());
        } else {
            File rpWebapp = new File(baseDir + File.separator + server.getHost().getAppBase(), "fediz-oidc");
            Context cxt = server.addWebapp("/fediz-oidc", rpWebapp.getAbsolutePath());

            // Substitute the IDP port. Necessary if running the test in eclipse where port filtering doesn't seem
            // to work
            File f = new File(currentDir + "/src/test/resources/fediz_config.xml");
            FileInputStream inputStream = new FileInputStream(f);
            String content = IOUtils.toString(inputStream, "UTF-8");
            inputStream.close();
            if (content.contains("idp.https.port")) {
                content = content.replaceAll("\\$\\{idp.https.port\\}", "" + idpHttpsPort);

                File f2 = new File(baseDir + "/test-classes/fediz_config.xml");
                try (FileOutputStream outputStream = new FileOutputStream(f2)) {
                    IOUtils.write(content, outputStream, "UTF-8");
                }
            }

            FederationAuthenticator fa = new FederationAuthenticator();
            fa.setConfigFile(currentDir + File.separator + "target" + File.separator + "test-classes"
                    + File.separator + "fediz_config.xml");
            cxt.getPipeline().addValve(fa);
        }

        server.start();

        return server;
    }

    @AfterClass
    public static void cleanup() throws Exception {
        try {
            loginToClientsPageAndDeleteClient(rpHttpsPort, idpHttpsPort);
        } finally {
            shutdownServer(idpServer);
            shutdownServer(rpServer);
        }
    }

    private static void shutdownServer(Tomcat server) {
        try {
            if (server != null && server.getServer() != null
                    && server.getServer().getState() != LifecycleState.DESTROYED) {
                if (server.getServer().getState() != LifecycleState.STOPPED) {
                    server.stop();
                }
                server.destroy();
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public String getIdpHttpsPort() {
        return idpHttpsPort;
    }

    public String getRpHttpsPort() {
        return rpHttpsPort;
    }

    public String getServletContextName() {
        return "fedizhelloworld";
    }

    // Runs as BeforeClass: Login to the OIDC Clients page + create two new clients
    private static void loginToClientsPage(String rpPort, String idpPort) throws Exception {
        String url = "https://localhost:" + rpPort + "/fediz-oidc/console/clients";
        String user = "alice";
        String password = "ecila";

        // Login to the client page successfully
        WebClient webClient = setupWebClient(user, password, idpPort);
        HtmlPage loginPage = login(url, webClient);
        final String bodyTextContent = loginPage.getBody().getTextContent();
        Assert.assertTrue(bodyTextContent.contains("Registered Clients"));

        // Now try to register a new client
        HtmlPage registeredClientPage = registerNewClient(webClient, url, "new-client", "https://127.0.0.1",
                "https://cxf.apache.org");
        String registeredClientPageBody = registeredClientPage.getBody().getTextContent();
        Assert.assertTrue(registeredClientPageBody.contains("Registered Clients"));
        Assert.assertTrue(registeredClientPageBody.contains("new-client"));
        Assert.assertTrue(registeredClientPageBody.contains("https://127.0.0.1"));

        HtmlTable table = registeredClientPage.getHtmlElementById("registered_clients");
        storedClientId = table.getCellAt(1, 1).asText().trim();
        Assert.assertNotNull(storedClientId);

        // Try to register another new client
        registeredClientPage = registerNewClient(webClient, url, "new-client2", "https://127.0.1.1",
                "https://ws.apache.org");
        registeredClientPageBody = registeredClientPage.getBody().getTextContent();
        Assert.assertTrue(registeredClientPageBody.contains("Registered Clients"));
        Assert.assertTrue(registeredClientPageBody.contains("new-client"));
        Assert.assertTrue(registeredClientPageBody.contains("https://127.0.0.1"));
        Assert.assertTrue(registeredClientPageBody.contains("new-client2"));
        Assert.assertTrue(registeredClientPageBody.contains("https://127.0.1.1"));

        table = registeredClientPage.getHtmlElementById("registered_clients");
        storedClient2Id = table.getCellAt(2, 1).asText().trim();
        if (storedClient2Id.equals(storedClientId)) {
            storedClient2Id = table.getCellAt(1, 1).asText().trim();
        }
        Assert.assertNotNull(storedClient2Id);

        webClient.close();
    }

    private static HtmlPage registerNewClient(WebClient webClient, String url, String clientName,
            String redirectURI, String clientAudience) throws Exception {
        HtmlPage registerPage = webClient.getPage(url + "/register");

        final HtmlForm form = registerPage.getForms().get(0);

        // Set new client values
        final HtmlTextInput clientNameInput = form.getInputByName("client_name");
        clientNameInput.setValueAttribute(clientName);
        final HtmlSelect clientTypeSelect = form.getSelectByName("client_type");
        clientTypeSelect.setSelectedAttribute("confidential", true);
        final HtmlTextInput redirectURIInput = form.getInputByName("client_redirectURI");
        redirectURIInput.setValueAttribute(redirectURI);
        final HtmlTextInput clientAudienceURIInput = form.getInputByName("client_audience");
        clientAudienceURIInput.setValueAttribute(clientAudience);

        final HtmlButton button = form.getButtonByName("submit_button");
        return button.click();
    }

    // Runs as AfterClass: Login to the OIDC Clients page + delete the created clients!
    private static void loginToClientsPageAndDeleteClient(String rpPort, String idpPort) throws Exception {
        String url = "https://localhost:" + rpPort + "/fediz-oidc/console/clients";
        String user = "alice";
        String password = "ecila";

        // Login to the client page successfully
        WebClient webClient = setupWebClient(user, password, idpPort);
        HtmlPage loginPage = login(url, webClient);
        final String bodyTextContent = loginPage.getBody().getTextContent();
        Assert.assertTrue(bodyTextContent.contains("Registered Clients"));

        // Get the client identifier
        HtmlTable table = loginPage.getHtmlElementById("registered_clients");
        String clientId = table.getCellAt(1, 1).asText().trim();
        Assert.assertNotNull(clientId);
        String clientId2 = table.getCellAt(2, 1).asText().trim();
        Assert.assertNotNull(clientId2);

        // Now go to the specific client page
        HtmlPage registeredClientsPage = deleteClient(webClient, url, clientId);

        // Check we have one more registered clients
        table = registeredClientsPage.getHtmlElementById("registered_clients");
        Assert.assertEquals(2, table.getRowCount());

        // Now delete the other client
        registeredClientsPage = deleteClient(webClient, url, clientId2);

        // Check we have no more registered clients
        table = registeredClientsPage.getHtmlElementById("registered_clients");
        Assert.assertEquals(1, table.getRowCount());

        webClient.close();
    }

    private static HtmlPage deleteClient(WebClient webClient, String url, String clientId) throws Exception {
        HtmlPage clientPage = webClient.getPage(url + "/" + clientId);

        final HtmlForm deleteForm = clientPage.getFormByName("deleteForm");
        Assert.assertNotNull(deleteForm);

        // Delete the client
        final HtmlButton button = deleteForm.getButtonByName("submit_delete_button");
        return button.click();
    }

    // Test that we managed to create the clients ok
    @org.junit.Test
    public void testCreatedClients() throws Exception {
        String url = "https://localhost:" + getRpHttpsPort() + "/fediz-oidc/console/clients";
        String user = "alice";
        String password = "ecila";

        // Login to the client page successfully
        WebClient webClient = setupWebClient(user, password, getIdpHttpsPort());
        HtmlPage loginPage = login(url, webClient);
        final String bodyTextContent = loginPage.getBody().getTextContent();
        Assert.assertTrue(bodyTextContent.contains("Registered Clients"));

        // Get the new client identifier
        HtmlTable table = loginPage.getHtmlElementById("registered_clients");

        // 2 clients
        Assert.assertEquals(table.getRows().size(), 3);

        // Now check the first client
        String clientId = table.getCellAt(1, 1).asText().trim();
        Assert.assertNotNull(clientId);

        // Check the Date
        String date = table.getCellAt(1, 2).asText().trim();
        SimpleDateFormat dateFormat = new SimpleDateFormat("dd MMM yyyy", Locale.US);
        dateFormat.setTimeZone(TimeZone.getTimeZone("GMT"));
        Assert.assertEquals(dateFormat.format(new Date()), date);

        // Check the redirect URI
        String redirectURI = table.getCellAt(1, 3).asText().trim();
        Assert.assertTrue("https://127.0.0.1".equals(redirectURI) || "https://127.0.1.1".equals(redirectURI));

        // Now check the specific client page
        HtmlPage clientPage = webClient.getPage(url + "/" + clientId);
        HtmlTable clientTable = clientPage.getHtmlElementById("client");
        Assert.assertEquals(clientId, clientTable.getCellAt(1, 0).asText().trim());

        webClient.close();
    }

    @org.junit.Test
    public void testOIDCLoginForClient1() throws Exception {

        String url = "https://localhost:" + getRpHttpsPort() + "/fediz-oidc/idp/authorize?";
        url += "client_id=" + storedClientId;
        url += "&response_type=code";
        url += "&scope=openid";
        String user = "alice";
        String password = "ecila";

        // Login to the OIDC token endpoint + get the authorization code
        WebClient webClient = setupWebClient(user, password, getIdpHttpsPort());
        String authorizationCode = loginAndGetAuthorizationCode(url, webClient);
        Assert.assertNotNull(authorizationCode);

        // Now use the code to get an IdToken

        url = "https://localhost:" + getRpHttpsPort() + "/fediz-oidc/oauth2/token";
        WebRequest request = new WebRequest(new URL(url), HttpMethod.POST);

        request.setRequestParameters(new ArrayList<NameValuePair>());
        request.getRequestParameters().add(new NameValuePair("client_id", storedClientId));
        request.getRequestParameters().add(new NameValuePair("grant_type", "authorization_code"));
        request.getRequestParameters().add(new NameValuePair("code", authorizationCode));

        webClient.getOptions().setJavaScriptEnabled(false);
        final UnexpectedPage responsePage = webClient.getPage(request);
        String response = responsePage.getWebResponse().getContentAsString();

        // Check the IdToken
        String idToken = getIdToken(response);
        Assert.assertNotNull(idToken);
        validateIdToken(idToken, storedClientId);

        webClient.close();
    }

    // TODO @Ignoring failing test for now
    @org.junit.Test
    @org.junit.Ignore
    public void testOIDCLoginForClient2() throws Exception {

        String url = "https://localhost:" + getRpHttpsPort() + "/fediz-oidc/idp/authorize?";
        url += "client_id=" + storedClient2Id;
        url += "&response_type=code";
        url += "&scope=openid";
        String user = "alice";
        String password = "ecila";

        // Login to the OIDC token endpoint + get the authorization code
        WebClient webClient = setupWebClient(user, password, getIdpHttpsPort());
        String authorizationCode = loginAndGetAuthorizationCode(url, webClient);
        Assert.assertNotNull(authorizationCode);

        // Now use the code to get an IdToken

        url = "https://localhost:" + getRpHttpsPort() + "/fediz-oidc/oauth2/token";
        WebRequest request = new WebRequest(new URL(url), HttpMethod.POST);

        request.setRequestParameters(new ArrayList<NameValuePair>());
        request.getRequestParameters().add(new NameValuePair("client_id", storedClient2Id));
        request.getRequestParameters().add(new NameValuePair("grant_type", "authorization_code"));
        request.getRequestParameters().add(new NameValuePair("code", authorizationCode));

        webClient.getOptions().setJavaScriptEnabled(false);
        final UnexpectedPage responsePage = webClient.getPage(request);
        String response = responsePage.getWebResponse().getContentAsString();

        // Check the IdToken
        String idToken = getIdToken(response);
        Assert.assertNotNull(idToken);
        validateIdToken(idToken, storedClient2Id);

        webClient.close();
    }

    // TODO @Ignoring failing test for now
    @org.junit.Test
    @org.junit.Ignore
    public void testUsingCodeForOtherClient() throws Exception {
        // Get the code for the first client
        String url = "https://localhost:" + getRpHttpsPort() + "/fediz-oidc/idp/authorize?";
        url += "client_id=" + storedClientId;
        url += "&response_type=code";
        url += "&scope=openid";
        String user = "alice";
        String password = "ecila";

        // Login to the OIDC token endpoint + get the authorization code
        WebClient webClient = setupWebClient(user, password, getIdpHttpsPort());
        String authorizationCode = loginAndGetAuthorizationCode(url, webClient);
        Assert.assertNotNull(authorizationCode);

        // Now try and get a token for the second client
        url = "https://localhost:" + getRpHttpsPort() + "/fediz-oidc/oauth2/token";
        WebRequest request = new WebRequest(new URL(url), HttpMethod.POST);

        request.setRequestParameters(new ArrayList<NameValuePair>());
        request.getRequestParameters().add(new NameValuePair("client_id", storedClient2Id));
        request.getRequestParameters().add(new NameValuePair("grant_type", "authorization_code"));
        request.getRequestParameters().add(new NameValuePair("code", authorizationCode));

        webClient.getOptions().setJavaScriptEnabled(false);
        try {
            webClient.getPage(request);
            Assert.fail();
        } catch (FailingHttpStatusCodeException ex) {
            // expected
        }
    }

    @org.junit.Test
    public void testBadClientId() throws Exception {

        String url = "https://localhost:" + getRpHttpsPort() + "/fediz-oidc/idp/authorize?";
        url += "client_id=" + storedClientId + 2;
        url += "&response_type=code";
        url += "&scope=openid";
        String user = "alice";
        String password = "ecila";

        // Login to the OIDC token endpoint + get the authorization code
        WebClient webClient = setupWebClient(user, password, getIdpHttpsPort());

        String authorizationCode = loginAndGetAuthorizationCode(url, webClient);
        Assert.assertNull(authorizationCode);

        webClient.close();
    }

    @org.junit.Test
    public void testEmptyClientId() throws Exception {

        String url = "https://localhost:" + getRpHttpsPort() + "/fediz-oidc/idp/authorize?";
        url += "client_id=";
        url += "&response_type=code";
        url += "&scope=openid";
        String user = "alice";
        String password = "ecila";

        // Login to the OIDC token endpoint + get the authorization code
        WebClient webClient = setupWebClient(user, password, getIdpHttpsPort());

        String authorizationCode = loginAndGetAuthorizationCode(url, webClient);
        Assert.assertNull(authorizationCode);

        webClient.close();
    }

    @org.junit.Test
    public void testIncorrectRedirectURI() throws Exception {

        String url = "https://localhost:" + getRpHttpsPort() + "/fediz-oidc/idp/authorize?";
        url += "client_id=" + storedClientId;
        url += "&response_type=code";
        url += "&scope=openid";
        url += "&redirect_uri=https://127.0.0.5";
        String user = "alice";
        String password = "ecila";

        // Login to the OIDC token endpoint + get the authorization code
        WebClient webClient = setupWebClient(user, password, getIdpHttpsPort());

        String authorizationCode = loginAndGetAuthorizationCode(url, webClient);
        Assert.assertNull(authorizationCode);

        webClient.close();
    }

    @org.junit.Test
    public void testCreateClientWithInvalidRegistrationURI() throws Exception {
        String url = "https://localhost:" + getRpHttpsPort() + "/fediz-oidc/console/clients";
        String user = "alice";
        String password = "ecila";

        // Login to the client page successfully
        WebClient webClient = setupWebClient(user, password, getIdpHttpsPort());
        HtmlPage loginPage = login(url, webClient);
        final String bodyTextContent = loginPage.getBody().getTextContent();
        Assert.assertTrue(bodyTextContent.contains("Registered Clients"));

        // Now try to register a new client
        try {
            HtmlPage errorPage = registerNewClient(webClient, url, "asfxyz", "https://127.0.0.1//",
                    "https://cxf.apache.org");
            Assert.assertTrue(errorPage.asText().contains("Invalid Client Registration"));
        } catch (Exception ex) {
            // expected
        }

        webClient.close();
    }

    @org.junit.Test
    public void testCreateClientWithRegistrationURIFragment() throws Exception {
        String url = "https://localhost:" + getRpHttpsPort() + "/fediz-oidc/console/clients";
        String user = "alice";
        String password = "ecila";

        // Login to the client page successfully
        WebClient webClient = setupWebClient(user, password, getIdpHttpsPort());
        HtmlPage loginPage = login(url, webClient);
        final String bodyTextContent = loginPage.getBody().getTextContent();
        Assert.assertTrue(bodyTextContent.contains("Registered Clients"));

        // Now try to register a new client
        try {
            HtmlPage errorPage = registerNewClient(webClient, url, "asfxyz", "https://127.0.0.1#fragment",
                    "https://cxf.apache.org");
            Assert.assertTrue(errorPage.asText().contains("Invalid Client Registration"));
        } catch (Exception ex) {
            // expected
        }

        webClient.close();
    }

    @org.junit.Test
    public void testCreateClientWithInvalidAudienceURI() throws Exception {
        String url = "https://localhost:" + getRpHttpsPort() + "/fediz-oidc/console/clients";
        String user = "alice";
        String password = "ecila";

        // Login to the client page successfully
        WebClient webClient = setupWebClient(user, password, getIdpHttpsPort());
        HtmlPage loginPage = login(url, webClient);
        final String bodyTextContent = loginPage.getBody().getTextContent();
        Assert.assertTrue(bodyTextContent.contains("Registered Clients"));

        // Now try to register a new client
        try {
            HtmlPage errorPage = registerNewClient(webClient, url, "asfxyz", "https://127.0.0.1/",
                    "https://cxf.apache.org//");
            Assert.assertTrue(errorPage.asText().contains("Invalid Client Registration"));
        } catch (Exception ex) {
            // expected
        }

        webClient.close();
    }

    @org.junit.Test
    public void testCreateClientWithAudienceURIFragment() throws Exception {
        String url = "https://localhost:" + getRpHttpsPort() + "/fediz-oidc/console/clients";
        String user = "alice";
        String password = "ecila";

        // Login to the client page successfully
        WebClient webClient = setupWebClient(user, password, getIdpHttpsPort());
        HtmlPage loginPage = login(url, webClient);
        final String bodyTextContent = loginPage.getBody().getTextContent();
        Assert.assertTrue(bodyTextContent.contains("Registered Clients"));

        // Now try to register a new client
        try {
            HtmlPage errorPage = registerNewClient(webClient, url, "asfxyz", "https://127.0.0.1",
                    "https://cxf.apache.org#fragment");
            Assert.assertTrue(errorPage.asText().contains("Invalid Client Registration"));
        } catch (Exception ex) {
            // expected
        }

        webClient.close();
    }

    private static WebClient setupWebClient(String user, String password, String idpPort) {
        final WebClient webClient = new WebClient();
        webClient.getOptions().setUseInsecureSSL(true);
        webClient.getCredentialsProvider().setCredentials(new AuthScope("localhost", Integer.parseInt(idpPort)),
                new UsernamePasswordCredentials(user, password));

        webClient.getOptions().setJavaScriptEnabled(false);

        return webClient;
    }

    private static HtmlPage login(String url, WebClient webClient) throws IOException {
        webClient.getOptions().setJavaScriptEnabled(false);
        final HtmlPage idpPage = webClient.getPage(url);
        webClient.getOptions().setJavaScriptEnabled(true);
        Assert.assertEquals("IDP SignIn Response Form", idpPage.getTitleText());

        // Test the SAML Version here
        DomNodeList<DomElement> results = idpPage.getElementsByTagName("input");

        String wresult = null;
        for (DomElement result : results) {
            if ("wresult".equals(result.getAttributeNS(null, "name"))) {
                wresult = result.getAttributeNS(null, "value");
                break;
            }
        }
        Assert.assertTrue(wresult != null && wresult.contains("urn:oasis:names:tc:SAML:2.0:cm:bearer"));

        final HtmlForm form = idpPage.getFormByName("signinresponseform");
        final HtmlSubmitInput button = form.getInputByName("_eventId_submit");

        return button.click();
    }

    private static String loginAndGetAuthorizationCode(String url, WebClient webClient) throws Exception {
        webClient.getOptions().setJavaScriptEnabled(false);
        final HtmlPage idpPage = webClient.getPage(url);
        webClient.getOptions().setJavaScriptEnabled(true);
        Assert.assertEquals("IDP SignIn Response Form", idpPage.getTitleText());

        DomNodeList<DomElement> results = idpPage.getElementsByTagName("input");

        String wresult = null;
        for (DomElement result : results) {
            if ("wresult".equals(result.getAttributeNS(null, "name"))) {
                wresult = result.getAttributeNS(null, "value");
                break;
            }
        }
        Assert.assertTrue(wresult != null && wresult.contains("urn:oasis:names:tc:SAML:2.0:cm:bearer"));

        final HtmlForm form = idpPage.getFormByName("signinresponseform");
        final HtmlSubmitInput button = form.getInputByName("_eventId_submit");

        // Bit of a hack here to get the authorization code - necessary as HtmlUnit tries
        // to follow the server redirect to "https://127.0.0.1" - the redirect URI
        CodeWebConnectionWrapper wrapper = new CodeWebConnectionWrapper(webClient);

        try {
            button.click();
        } catch (Throwable t) {
            // expected
        }

        wrapper.close();
        return wrapper.getCode();
    }

    private String getIdToken(String parentString) {
        String foundString = parentString
                .substring(parentString.indexOf("id_token") + ("id_token" + "\":\"").length());
        int ampersandIndex = foundString.indexOf('\"');
        if (ampersandIndex < 1) {
            ampersandIndex = foundString.length();
        }
        return foundString.substring(0, ampersandIndex);
    }

    private void validateIdToken(String idToken, String audience)
            throws KeyStoreException, NoSuchAlgorithmException, CertificateException, IOException {
        JwsJwtCompactConsumer jwtConsumer = new JwsJwtCompactConsumer(idToken);
        JwtToken jwt = jwtConsumer.getJwtToken();

        // Validate claims
        Assert.assertEquals("alice", jwt.getClaim("preferred_username"));
        Assert.assertEquals("accounts.fediz.com", jwt.getClaim(JwtConstants.CLAIM_ISSUER));
        Assert.assertEquals(audience, jwt.getClaim(JwtConstants.CLAIM_AUDIENCE));
        Assert.assertNotNull(jwt.getClaim(JwtConstants.CLAIM_EXPIRY));
        Assert.assertNotNull(jwt.getClaim(JwtConstants.CLAIM_ISSUED_AT));

        KeyStore keystore = KeyStore.getInstance("JKS");
        keystore.load(Loader.getResource("oidc.jks").openStream(), "password".toCharArray());
        Certificate cert = keystore.getCertificate("alice");
        Assert.assertNotNull(cert);

        Assert.assertTrue(jwtConsumer.verifySignatureWith((X509Certificate) cert, SignatureAlgorithm.RS256));
    }

    private static class CodeWebConnectionWrapper extends WebConnectionWrapper {

        private String code;

        CodeWebConnectionWrapper(WebClient webClient) throws IllegalArgumentException {
            super(webClient);
        }

        public WebResponse getResponse(WebRequest request) throws IOException {
            WebResponse response = super.getResponse(request);
            String location = response.getResponseHeaderValue("Location");
            if (location != null && location.contains("code=")) {
                code = getSubstring(location, "code");
            }

            return response;
        }

        public String getCode() {
            return code;
        }

        private String getSubstring(String parentString, String substringName) {
            String foundString = parentString
                    .substring(parentString.indexOf(substringName + "=") + (substringName + "=").length());
            int ampersandIndex = foundString.indexOf('&');
            if (ampersandIndex < 1) {
                ampersandIndex = foundString.length();
            }
            return foundString.substring(0, ampersandIndex);
        }
    }
}