com.predic8.membrane.core.interceptor.authentication.session.LoginDialog Maven / Gradle / Ivy

/* Copyright 2012 predic8 GmbH, www.predic8.com

   Licensed 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 com.predic8.membrane.core.interceptor.authentication.session;

import com.floreysoft.jmte.*;
import com.floreysoft.jmte.message.*;
import com.floreysoft.jmte.token.*;
import com.google.common.collect.*;
import com.predic8.membrane.core.*;
import com.predic8.membrane.core.exchange.*;
import com.predic8.membrane.core.http.*;
import com.predic8.membrane.core.interceptor.*;
import com.predic8.membrane.core.interceptor.authentication.session.SessionManager.*;
import com.predic8.membrane.core.interceptor.oauth2.*;
import com.predic8.membrane.core.interceptor.server.*;
import com.predic8.membrane.core.resolver.*;
import com.predic8.membrane.core.util.URI;
import com.predic8.membrane.core.util.*;
import org.apache.commons.lang3.*;

import org.apache.commons.text.*;
import org.apache.commons.text.StringEscapeUtils;
import org.slf4j.*;

import java.io.*;
import java.net.*;
import java.util.*;

import static com.predic8.membrane.core.interceptor.Outcome.*;
import static com.predic8.membrane.core.interceptor.oauth2.ConsentPageFile.*;
import static com.predic8.membrane.core.interceptor.oauth2.OAuth2Util.*;

import static com.predic8.membrane.core.util.URLParamUtil.DuplicateKeyOrInvalidFormStrategy.*;
import static java.nio.charset.StandardCharsets.*;
import static org.apache.commons.text.StringEscapeUtils.*;

public class LoginDialog {
	private static final Logger log = LoggerFactory.getLogger(LoginDialog.class.getName());

	private final String basePath;
	private final String path;
	private final String message;
	private final boolean exposeUserCredentialsToSession;
	private URIFactory uriFactory;

	private final UserDataProvider userDataProvider;
	private final TokenProvider tokenProvider;
	private final SessionManager sessionManager;
	private final AccountBlocker accountBlocker;

	private final WebServerInterceptor wsi;

	public LoginDialog(
			UserDataProvider userDataProvider,
			TokenProvider tokenProvider,
			SessionManager sessionManager,
			AccountBlocker accountBlocker,
			String dialogLocation,
			String basePath,
			String path,
			boolean exposeUserCredentialsToSession,
			String message) {
		this.basePath = basePath;
		this.path = path;
		if (basePath.length() > 0)
			if ((basePath.endsWith("/") ? 1 : 0) + (path.startsWith("/") ? 1 : 0) != 1)
				throw new RuntimeException("Login dialog is configured with basePath='\" + basePath + \"' and path='" + path +
						"'. Please ensure that basePath ends with a '/' xOR path starts with a '/'. (Concatenation '" + basePath + path + "' looks weird.)')");
		this.exposeUserCredentialsToSession = exposeUserCredentialsToSession;
		this.userDataProvider = userDataProvider;
		this.tokenProvider = tokenProvider;
		this.sessionManager = sessionManager;
		this.accountBlocker = accountBlocker;
		this.message = message;

		wsi = new WebServerInterceptor();
		wsi.setDocBase(dialogLocation);
	}

	public void init(Router router) throws Exception {
		uriFactory = router.getUriFactory();
		wsi.init(router);
		router.getResolverMap().resolve(ResolverMap.combine(router.getBaseLocation(), wsi.getDocBase(), "index.html")).close();

	}

	public boolean isLoginRequest(Exchange exc) {
		URI uri = uriFactory.createWithoutException(exc.getRequest().getUri());
		return uri.getPath().startsWith(path);
	}

	private void showPage(Exchange exc, int page, Object... params) throws Exception {
		String target = StringUtils.defaultString(URLParamUtil.getParams(uriFactory, exc, ERROR).get("target"));

		exc.getDestinations().set(0, "/index.html");
		wsi.handleRequest(exc);

		Engine engine = new Engine();
		engine.setErrorHandler(new ErrorHandler() {

			@Override
			public void error(ErrorMessage arg0, Token arg1, Map arg2) throws ParseException {
				log.error(arg0.key);
			}

			@Override
			public void error(ErrorMessage arg0, Token arg1) throws ParseException {
				log.error(arg0.key);
			}
		});

		Map model = new HashMap<>();
		model.put("action", escapeXml11(basePath + path));
		model.put("target", escapeXml11(target));
		if(page == 0)
			model.put("login", true);
		if (page == 1)
			model.put("token", true);
		if(page == 2) {
			model.put("consent", true);
			model.put("action", escapeXml11(basePath + path) + "consent");
		}
		for (int i = 0; i < params.length; i+=2)
			model.put((String)params[i], params[i+1]);

		exc.getResponse().setBodyContent(engine.transform(exc.getResponse().getBodyAsStringDecoded(), model).getBytes(UTF_8));
	}

	public void handleLoginRequest(Exchange exc) throws Exception {
		Session s = sessionManager.getSession(exc);

		String uri = exc.getRequest().getUri().substring(basePath.length() + path.length()-1);
		if (uri.indexOf('?') >= 0)
			uri = uri.substring(0, uri.indexOf('?'));
		exc.getDestinations().set(0, uri);

        switch (uri) {
            case "/logout" -> {
                if (s != null)
                    s.clear();
                exc.setResponse(Response.redirect(path, false).body("").build());
            }
            case "/consent" -> {
                if (exc.getRequest().getMethod().equals("POST"))
                    processConsentPageResult(exc, s);
                else
                    showConsentPage(exc, s);
            }
            case "/" -> {
                if (s == null || !s.isPreAuthorized()) {
                    if (exc.getRequest().getMethod().equals("POST")) {
                        Map userAttributes;
                        Map params = URLParamUtil.getParams(uriFactory, exc, ERROR);
                        String username = params.get("username");
                        if (username == null) {
                            showPage(exc, 0, "error", "INVALID_PASSWORD");
                            return;
                        }
                        if (accountBlocker != null && accountBlocker.isBlocked(username)) {
                            showPage(exc, 0, "error", "ACCOUNT_BLOCKED");
                            return;
                        }
                        try {
                            userAttributes = userDataProvider.verify(params);
                        } catch (NoSuchElementException e) {
                            List params2 = Lists.newArrayList("error", "INVALID_PASSWORD");
                            if (accountBlocker != null) {
                                if (accountBlocker.fail(username))
                                    params2.addAll(Lists.newArrayList("accountBlocked", "true"));
                            }
                            showPage(exc, 0, params2.toArray());
                            return;
                        } catch (Exception e) {
                            log.error("", e);
                            showPage(exc, 0, "error", "INTERNAL_SERVER_ERROR");
                            return;
                        }
                        if (exposeUserCredentialsToSession) {
                            for (Map.Entry param : params.entrySet())
                                if (!userAttributes.containsKey(param.getKey()))
                                    userAttributes.put(param.getKey(), param.getValue());
                        }
                        if (tokenProvider != null)
                            showPage(exc, 1);
                        else {
                            String target = params.get("target");
                            if (StringUtils.isEmpty(target))
                                target = basePath + (basePath.endsWith("/") ? "" : "/");
                            exc.setResponse(Response.redirectWithout300(target).build());
                        }

                        Session session = sessionManager.getOrCreateSession(exc);
                        session.preAuthorize(username, userAttributes);
                        if (tokenProvider != null)
                            tokenProvider.requestToken(session.getUserAttributes());
                    } else {
                        showPage(exc, 0);
                    }
                } else {
                    if (accountBlocker != null && accountBlocker.isBlocked(s.getUserName())) {
                        showPage(exc, 0, "error", "ACCOUNT_BLOCKED");
                        return;
                    }
                    if (exc.getRequest().getMethod().equals("POST")) {
                        String token = URLParamUtil.getParams(uriFactory, exc, ERROR).get("token");
                        try {
                            if (tokenProvider != null)
                                tokenProvider.verifyToken(s.getUserAttributes(), token);
                        } catch (NoSuchElementException e) {
                            List params = Lists.newArrayList("error", "INVALID_TOKEN");
                            if (accountBlocker != null)
                                if (accountBlocker.fail(s.getUserName()))
                                    params.addAll(Lists.newArrayList("accountBlocked", "true"));
                            s.clear();
                            showPage(exc, 0, params.toArray());
                            return;
                        } catch (Exception e) {
                            log.error("", e);
                            s.clear();
                            showPage(exc, 0, "error", "INTERNAL_SERVER_ERROR");
                            return;
                        }
                        if (accountBlocker != null)
                            accountBlocker.unblock(s.getUserName());
                        String target = URLParamUtil.getParams(uriFactory, exc, ERROR).get("target");
                        if (StringUtils.isEmpty(target))
                            target = basePath + (basePath.endsWith("/") ? "" : "/");

                        if (this.message != null)
                            exc.setResponse(Response.redirectWithout300(target, message).build());
                        else
                            exc.setResponse(Response.redirectWithout300(target).build());

                        s.authorize();
                    } else {
                        showPage(exc, 1);
                    }
                }
            }
            default -> wsi.handleRequest(exc);
        }
	}

	private void processConsentPageResult(Exchange exc, Session s) throws Exception {
		removeConsentPageDataFromSession(s);
		putConsentInSession(exc, s);
		redirectAfterConsent(exc);
	}

	private void removeConsentPageDataFromSession(Session s) {
		if(s == null)
			return;
		synchronized (s) {
			s.getUserAttributes().remove(PRODUCT_NAME);
			s.getUserAttributes().remove(LOGO_URL);
			s.getUserAttributes().remove(SCOPE_DESCRIPTIONS);
			s.getUserAttributes().remove(CLAIM_DESCRIPTIONS);
		}
	}

	private void redirectAfterConsent(Exchange exc) throws Exception {
		String target = URLParamUtil.getParams(uriFactory, exc, ERROR).get("target");
		if (StringUtils.isEmpty(target))
		    target = basePath + (basePath.endsWith("/") ? "" : "/");
		exc.setResponse(Response.redirectWithout300(target).build());
	}

	private void putConsentInSession(Exchange exc, Session s) throws Exception {
		if(s == null)
			return;
		Map params = URLParamUtil.getParams(uriFactory, exc, ERROR);
		String consentResult = "false";
		String consent = params.get("consent");
		if (consent == null) {
			throw new Exception("There is no form parameter consent in the request present.");
		}
		if(consent.equals("Accept"))
            consentResult = "true";

		synchronized (s) {
			s.getUserAttributes().put("consent", consentResult);
		}
	}

	private void showConsentPage(Exchange exc, Session s) throws Exception {
		if(s == null){
			showPage(exc,2, PRODUCT_NAME,null, LOGO_URL,null,"scopes", null, "claims", null);
			return;
		}
		synchronized(s) {
			showPage(exc,2,
                    PRODUCT_NAME,
                    s.getUserAttributes().get(PRODUCT_NAME),
                    LOGO_URL,
                    s.getUserAttributes().get(LOGO_URL),
                    "scopes",
                    doubleStringArrayToMap(prepareScopesFromSession(s)),
                    "claims",
                    doubleStringArrayToMap(prepareClaimsFromSession(s)));
		}

	}

	private Map doubleStringArrayToMap(String[] strings) {
		HashMap result = new HashMap<>();
		for(String string : strings) {
			String[] str = string.split(" ");
			for(int i = 2; i < str.length;i++)
				str[1] += " " + str[i];
			result.put(str[0], str[1]);
		}
		return result;
	}

	private String[] prepareClaimsFromSession(Session s) throws UnsupportedEncodingException {
		return prepareStringArray(decodeClaimsFromSession(s));
	}

	private String[] prepareScopesFromSession(Session s) throws UnsupportedEncodingException {
		return prepareStringArray(decodeScopesFromSession(s));
	}

	private String[] prepareStringArray(String[] array){
		if(array[0].isEmpty())
			return new String[0];
		List result = new ArrayList<>();
		for(int i = 0; i < array.length;i+=2)
			result.add(array[i] + ": " + array[i+1]);
		return result.toArray(new String[0]);
	}

	private String[] decodeClaimsFromSession(Session s) {
		return getUserAttributesFor(s, CLAIM_DESCRIPTIONS);
	}

	private String[] decodeScopesFromSession(Session s) {
		return getUserAttributesFor(s, SCOPE_DESCRIPTIONS);
	}

	private static String[] getUserAttributesFor(Session s, String name) {
		if (!s.getUserAttributes().containsKey(name))
			return new String[0];

		String[] claims = s.getUserAttributes().get(name).split(" ");
		for (int i = 0; i < claims.length; i++)
			claims[i] = urldecode(claims[i]);
		return claims;
	}

	public Outcome redirectToLogin(Exchange exc) {
		exc.setResponse(Response.
				redirect(path + "?target=" + URLEncoder.encode(exc.getOriginalRequestUri(), UTF_8), false).
				dontCache().
				body("").
				build());
		return RETURN;
	}
}