/*
    * Copyright (C) 2017 Thomas Wolf <thomas.wolf@paranor.ch>
    * and other copyright owners as documented in the project's IP log.
    *
    * This program and the accompanying materials are made available
    * under the terms of the Eclipse Distribution License v1.0 which
    * accompanies this distribution, is reproduced below, and is
    * available at http://www.eclipse.org/org/documents/edl-v10.php
    *
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or
   * without modification, are permitted provided that the following
   * conditions are met:
   *
   * - Redistributions of source code must retain the above copyright
   *   notice, this list of conditions and the following disclaimer.
   *
   * - Redistributions in binary form must reproduce the above
   *   copyright notice, this list of conditions and the following
   *   disclaimer in the documentation and/or other materials provided
   *   with the distribution.
   *
   * - Neither the name of the Eclipse Foundation, Inc. nor the
   *   names of its contributors may be used to endorse or promote
   *   products derived from this software without specific prior
   *   written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
   * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
   * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
   * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
   * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
   * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
   * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  package org.eclipse.jgit.http.test;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertFalse;
  import static org.junit.Assert.assertTrue;
  import static org.junit.Assert.fail;
  
  import java.io.IOException;
  import java.util.Arrays;
  import java.util.Collection;
  import java.util.EnumSet;
  import java.util.List;
  
  import javax.servlet.DispatcherType;
  import javax.servlet.Filter;
  import javax.servlet.FilterChain;
  import javax.servlet.FilterConfig;
  import javax.servlet.ServletException;
  import javax.servlet.ServletRequest;
  import javax.servlet.ServletResponse;
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  
  import org.eclipse.jetty.servlet.FilterHolder;
  import org.eclipse.jetty.servlet.ServletContextHandler;
  import org.eclipse.jetty.servlet.ServletHolder;
  import org.eclipse.jgit.errors.TransportException;
  import org.eclipse.jgit.errors.UnsupportedCredentialItem;
  import org.eclipse.jgit.http.server.GitServlet;
  import org.eclipse.jgit.junit.TestRepository;
  import org.eclipse.jgit.junit.http.AccessEvent;
  import org.eclipse.jgit.junit.http.AppServer;
  import org.eclipse.jgit.junit.http.HttpTestCase;
  import org.eclipse.jgit.lib.ConfigConstants;
  import org.eclipse.jgit.lib.NullProgressMonitor;
  import org.eclipse.jgit.lib.Repository;
  import org.eclipse.jgit.revwalk.RevBlob;
  import org.eclipse.jgit.revwalk.RevCommit;
  import org.eclipse.jgit.transport.CredentialItem;
  import org.eclipse.jgit.transport.CredentialsProvider;
  import org.eclipse.jgit.transport.HttpTransport;
  import org.eclipse.jgit.transport.Transport;
  import org.eclipse.jgit.transport.URIish;
  import org.eclipse.jgit.transport.UsernamePasswordCredentialsProvider;
  import org.eclipse.jgit.transport.http.HttpConnectionFactory;
  import org.eclipse.jgit.transport.http.JDKHttpConnectionFactory;
  import org.eclipse.jgit.transport.http.apache.HttpClientConnectionFactory;
  import org.eclipse.jgit.util.HttpSupport;
  import org.junit.Before;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.junit.runners.Parameterized;
  import org.junit.runners.Parameterized.Parameters;
  
  @RunWith(Parameterized.class)
  public class SmartClientSmartServerSslTest extends HttpTestCase {
 
 	// We run these tests with a server on localhost with a self-signed
 	// certificate. We don't do authentication tests here, so there's no need
 	// for username and password.
 	//
 	// But the server certificate will not validate. We know that Transport will
 	// ask whether we trust the server all the same. This credentials provider
 	// blindly trusts the self-signed certificate by answering "Yes" to all
 	// questions.
 	private CredentialsProvider testCredentials = new CredentialsProvider() {
 
 		@Override
 		public boolean isInteractive() {
 			return false;
 		}
 
 		@Override
 		public boolean supports(CredentialItem... items) {
 			for (CredentialItem item : items) {
 				if (item instanceof CredentialItem.InformationalMessage) {
 					continue;
 				}
 				if (item instanceof CredentialItem.YesNoType) {
 					continue;
 				}
 				return false;
 			}
 			return true;
 		}
 
 		@Override
 		public boolean get(URIish uri, CredentialItem... items)
 				throws UnsupportedCredentialItem {
 			for (CredentialItem item : items) {
 				if (item instanceof CredentialItem.InformationalMessage) {
 					continue;
 				}
 				if (item instanceof CredentialItem.YesNoType) {
 					((CredentialItem.YesNoType) item).setValue(true);
 					continue;
 				}
 				return false;
 			}
 			return true;
 		}
 	};
 
 	private URIish remoteURI;
 
 	private URIish secureURI;
 
 	private RevBlob A_txt;
 
 	private RevCommit A, B;
 
 	@Parameters
 	public static Collection<Object[]> data() {
 		// run all tests with both connection factories we have
 		return Arrays.asList(new Object[][] {
 				{ new JDKHttpConnectionFactory() },
 				{ new HttpClientConnectionFactory() } });
 	}
 
 	public SmartClientSmartServerSslTest(HttpConnectionFactory cf) {
 		HttpTransport.setConnectionFactory(cf);
 	}
 
 	@Override
 	protected AppServer createServer() {
 		return new AppServer(0, 0);
 	}
 
 	@Override
 	@Before
 	public void setUp() throws Exception {
 		super.setUp();
 
 		final TestRepository<Repository> src = createTestRepository();
 		final String srcName = src.getRepository().getDirectory().getName();
 		src.getRepository()
 				.getConfig()
 				.setBoolean(ConfigConstants.CONFIG_CORE_SECTION, null,
 						ConfigConstants.CONFIG_KEY_LOGALLREFUPDATES, true);
 
 		GitServlet gs = new GitServlet();
 
 		ServletContextHandler app = addNormalContext(gs, src, srcName);
 
 		server.setUp();
 
 		remoteURI = toURIish(app, srcName);
 		secureURI = new URIish(rewriteUrl(remoteURI.toString(), "https",
 				server.getSecurePort()));
 
 		A_txt = src.blob("A");
 		A = src.commit().add("A_txt", A_txt).create();
 		B = src.commit().parent(A).add("A_txt", "C").add("B", "B").create();
 		src.update(master, B);
 
 		src.update("refs/garbage/a/very/long/ref/name/to/compress", B);
 	}
 
 	private ServletContextHandler addNormalContext(GitServlet gs, TestRepository<Repository> src, String srcName) {
 		ServletContextHandler app = server.addContext("/git");
 		app.addFilter(new FilterHolder(new Filter() {
 
 			@Override
 			public void init(FilterConfig filterConfig)
 					throws ServletException {
 				// empty
 			}
 
 			// Redirects http to https for requests containing "/https/".
 			@Override
 			public void doFilter(ServletRequest request,
 					ServletResponse response, FilterChain chain)
 					throws IOException, ServletException {
 				final HttpServletResponse httpServletResponse = (HttpServletResponse) response;
 				final HttpServletRequest httpServletRequest = (HttpServletRequest) request;
 				final StringBuffer fullUrl = httpServletRequest.getRequestURL();
 				if (httpServletRequest.getQueryString() != null) {
 					fullUrl.append("?")
 							.append(httpServletRequest.getQueryString());
 				}
 				String urlString = rewriteUrl(fullUrl.toString(), "https",
 						server.getSecurePort());
 				httpServletResponse
 						.setStatus(HttpServletResponse.SC_MOVED_PERMANENTLY);
 				httpServletResponse.setHeader(HttpSupport.HDR_LOCATION,
 						urlString.replace("/https/", "/"));
 			}
 
 			@Override
 			public void destroy() {
 				// empty
 			}
 		}), "/https/*", EnumSet.of(DispatcherType.REQUEST));
 		app.addFilter(new FilterHolder(new Filter() {
 
 			@Override
 			public void init(FilterConfig filterConfig)
 					throws ServletException {
 				// empty
 			}
 
 			// Redirects https back to http for requests containing "/back/".
 			@Override
 			public void doFilter(ServletRequest request,
 					ServletResponse response, FilterChain chain)
 					throws IOException, ServletException {
 				final HttpServletResponse httpServletResponse = (HttpServletResponse) response;
 				final HttpServletRequest httpServletRequest = (HttpServletRequest) request;
 				final StringBuffer fullUrl = httpServletRequest.getRequestURL();
 				if (httpServletRequest.getQueryString() != null) {
 					fullUrl.append("?")
 							.append(httpServletRequest.getQueryString());
 				}
 				String urlString = rewriteUrl(fullUrl.toString(), "http",
 						server.getPort());
 				httpServletResponse
 						.setStatus(HttpServletResponse.SC_MOVED_PERMANENTLY);
 				httpServletResponse.setHeader(HttpSupport.HDR_LOCATION,
 						urlString.replace("/back/", "/"));
 			}
 
 			@Override
 			public void destroy() {
 				// empty
 			}
 		}), "/back/*", EnumSet.of(DispatcherType.REQUEST));
 		gs.setRepositoryResolver(new TestRepositoryResolver(src, srcName));
 		app.addServlet(new ServletHolder(gs), "/*");
 		return app;
 	}
 
 	@Test
 	public void testInitialClone_ViaHttps() throws Exception {
 		Repository dst = createBareRepository();
 		assertFalse(dst.hasObject(A_txt));
 
 		try (Transport t = Transport.open(dst, secureURI)) {
 			t.setCredentialsProvider(testCredentials);
 			t.fetch(NullProgressMonitor.INSTANCE, mirror(master));
 		}
 		assertTrue(dst.hasObject(A_txt));
 		assertEquals(B, dst.exactRef(master).getObjectId());
 		fsck(dst, B);
 
 		List<AccessEvent> requests = getRequests();
 		assertEquals(2, requests.size());
 	}
 
 	@Test
 	public void testInitialClone_RedirectToHttps() throws Exception {
 		Repository dst = createBareRepository();
 		assertFalse(dst.hasObject(A_txt));
 
 		URIish cloneFrom = extendPath(remoteURI, "/https");
 		try (Transport t = Transport.open(dst, cloneFrom)) {
 			t.setCredentialsProvider(testCredentials);
 			t.fetch(NullProgressMonitor.INSTANCE, mirror(master));
 		}
 		assertTrue(dst.hasObject(A_txt));
 		assertEquals(B, dst.exactRef(master).getObjectId());
 		fsck(dst, B);
 
 		List<AccessEvent> requests = getRequests();
 		assertEquals(3, requests.size());
 	}
 
 	@Test
 	public void testInitialClone_RedirectBackToHttp() throws Exception {
 		Repository dst = createBareRepository();
 		assertFalse(dst.hasObject(A_txt));
 
 		URIish cloneFrom = extendPath(secureURI, "/back");
 		try (Transport t = Transport.open(dst, cloneFrom)) {
 			t.setCredentialsProvider(testCredentials);
 			t.fetch(NullProgressMonitor.INSTANCE, mirror(master));
 			fail("Should have failed (redirect from https to http)");
 		} catch (TransportException e) {
 			assertTrue(e.getMessage().contains("not allowed"));
 		}
 	}
 
 	@Test
 	public void testInitialClone_SslFailure() throws Exception {
 		Repository dst = createBareRepository();
 		assertFalse(dst.hasObject(A_txt));
 
 		try (Transport t = Transport.open(dst, secureURI)) {
 			// Set a credentials provider that doesn't handle questions
 			t.setCredentialsProvider(
 					new UsernamePasswordCredentialsProvider("any", "anypwd"));
 			t.fetch(NullProgressMonitor.INSTANCE, mirror(master));
 			fail("Should have failed (SSL certificate not trusted)");
 		} catch (TransportException e) {
 			assertTrue(e.getMessage().contains("Secure connection"));
 		}
 	}
 
 }