/
OpenIdProvider.java
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/
OpenIdProvider.java
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//
// ========================================================================
// Copyright (c) 1995-2019 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
//
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
//
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
//
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
//
package org.eclipse.jetty.security.openid;
import java.io.IOException;
import java.time.Duration;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Random;
import java.util.UUID;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.eclipse.jetty.http.HttpVersion;
import org.eclipse.jetty.server.Request;
import org.eclipse.jetty.server.Response;
import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.server.ServerConnector;
import org.eclipse.jetty.servlet.ServletContextHandler;
import org.eclipse.jetty.servlet.ServletHolder;
import org.eclipse.jetty.util.StringUtil;
import org.eclipse.jetty.util.component.ContainerLifeCycle;
public class OpenIdProvider extends ContainerLifeCycle
{
private static final String CONFIG_PATH = "/.well-known/openid-configuration";
private static final String AUTH_PATH = "/auth";
private static final String TOKEN_PATH = "/token";
private final Map<String, User> issuedAuthCodes = new HashMap<>();
protected final String clientId;
protected final String clientSecret;
protected final List<String> redirectUris = new ArrayList<>();
private String provider;
private Server server;
private ServerConnector connector;
public OpenIdProvider(String clientId, String clientSecret)
{
this.clientId = clientId;
this.clientSecret = clientSecret;
server = new Server();
connector = new ServerConnector(server);
server.addConnector(connector);
ServletContextHandler contextHandler = new ServletContextHandler();
contextHandler.setContextPath("/");
contextHandler.addServlet(new ServletHolder(new OpenIdConfigServlet()), CONFIG_PATH);
contextHandler.addServlet(new ServletHolder(new OpenIdAuthEndpoint()), AUTH_PATH);
contextHandler.addServlet(new ServletHolder(new OpenIdTokenEndpoint()), TOKEN_PATH);
server.setHandler(contextHandler);
addBean(server);
}
@Override
protected void doStart() throws Exception
{
super.doStart();
provider = "http://localhost:" + connector.getLocalPort();
}
public String getProvider()
{
if (!isStarted())
throw new IllegalStateException();
return provider;
}
public void addRedirectUri(String uri)
{
redirectUris.add(uri);
}
public class OpenIdAuthEndpoint extends HttpServlet
{
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException
{
if (!clientId.equals(req.getParameter("client_id")))
{
resp.sendError(HttpServletResponse.SC_FORBIDDEN, "invalid client_id");
return;
}
String redirectUri = req.getParameter("redirect_uri");
if (!redirectUris.contains(redirectUri))
{
resp.sendError(HttpServletResponse.SC_FORBIDDEN, "invalid redirect_uri");
return;
}
String scopeString = req.getParameter("scope");
List<String> scopes = (scopeString == null) ? Collections.emptyList() : Arrays.asList(StringUtil.csvSplit(scopeString));
if (!scopes.contains("openid"))
{
resp.sendError(HttpServletResponse.SC_FORBIDDEN, "no openid scope");
return;
}
if (!"code".equals(req.getParameter("response_type")))
{
resp.sendError(HttpServletResponse.SC_FORBIDDEN, "response_type must be code");
return;
}
String state = req.getParameter("state");
if (state == null)
{
resp.sendError(HttpServletResponse.SC_FORBIDDEN, "no state param");
return;
}
String authCode = UUID.randomUUID().toString().replace("-", "");
User user = new User(123456789, "Alice");
issuedAuthCodes.put(authCode, user);
final Request baseRequest = Request.getBaseRequest(req);
final Response baseResponse = baseRequest.getResponse();
redirectUri += "?code=" + authCode + "&state=" + state;
int redirectCode = (baseRequest.getHttpVersion().getVersion() < HttpVersion.HTTP_1_1.getVersion() ?
HttpServletResponse.SC_MOVED_TEMPORARILY : HttpServletResponse.SC_SEE_OTHER);
baseResponse.sendRedirect(redirectCode, resp.encodeRedirectURL(redirectUri));
}
}
public class OpenIdTokenEndpoint extends HttpServlet
{
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException
{
String code = req.getParameter("code");
if (!clientId.equals(req.getParameter("client_id")) ||
!clientSecret.equals(req.getParameter("client_secret")) ||
!redirectUris.contains(req.getParameter("redirect_uri")) ||
!"authorization_code".equals(req.getParameter("grant_type")) ||
code == null)
{
resp.sendError(HttpServletResponse.SC_FORBIDDEN, "bad auth request");
return;
}
User user = issuedAuthCodes.remove(code);
if (user == null)
{
resp.sendError(HttpServletResponse.SC_FORBIDDEN, "invalid auth code");
return;
}
String accessToken = "ABCDEFG";
long expiry = System.currentTimeMillis() + Duration.ofMinutes(10).toMillis();
String response = "{" +
"\"access_token\": \"" + accessToken + "\"," +
"\"id_token\": \"" + JwtEncoder.encode(user.getIdToken()) + "\"," +
"\"expires_in\": " + expiry + "," +
"\"token_type\": \"Bearer\"" +
"}";
resp.setContentType("text/plain");
resp.getWriter().print(response);
}
}
public class OpenIdConfigServlet extends HttpServlet
{
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException
{
String discoveryDocument = "{" +
"\"issuer\": \"" + provider + "\"," +
"\"authorization_endpoint\": \"" + provider + AUTH_PATH + "\"," +
"\"token_endpoint\": \"" + provider + TOKEN_PATH + "\"," +
"}";
resp.getWriter().write(discoveryDocument);
}
}
public class User
{
private long subject;
private String name;
public User(String name)
{
this(new Random().nextLong(), name);
}
public User(long subject, String name)
{
this.subject = subject;
this.name = name;
}
public String getName()
{
return name;
}
public String getIdToken()
{
long expiry = System.currentTimeMillis() + Duration.ofMinutes(1).toMillis();
return JwtEncoder.createIdToken(provider, clientId, Long.toString(subject), name, expiry);
}
}
}