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- /*
- * Copyright (C) 2014 Laurent Goujon <lgoujon@twitter.com>
- * 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.util;
-
- import java.lang.reflect.Constructor;
- import java.lang.reflect.InvocationTargetException;
- import java.net.URL;
-
- import org.ietf.jgss.GSSManager;
-
- /**
- * Factory to detect which GSSManager implementation should be used.
- *
- * @since 3.4
- */
- public abstract class GSSManagerFactory {
- /**
- * Auto-detects the GSSManager factory to use based on system.
- *
- * @return detected GSSManager factory
- */
- public static GSSManagerFactory detect() {
- return (SunGSSManagerFactory.isSupported()) ? new SunGSSManagerFactory()
- : new DefaultGSSManagerFactory();
- }
-
- /**
- * Returns a GSS Manager instance for the provided url
- *
- * @param url
- * the repository url
- * @return a GSSManager instance
- */
- public abstract GSSManager newInstance(URL url);
-
- /**
- * DefaultGSSManagerFactory uses @link {@link GSSManager#getInstance()} but
- * you might need to set
- * <code>javax.security.auth.useSubjectCredsOnly</code> system property to
- * <code>false</code> for authentication to work.
- */
- private static class DefaultGSSManagerFactory extends GSSManagerFactory {
- private static final GSSManager INSTANCE = GSSManager.getInstance();
-
- @Override
- public GSSManager newInstance(URL url) {
- return INSTANCE;
- }
- }
-
- private static class SunGSSManagerFactory extends GSSManagerFactory {
- private static boolean IS_SUPPORTED;
- private static Constructor<?> HTTP_CALLER_INFO_CONSTRUCTOR;
- private static Constructor<?> HTTP_CALLER_CONSTRUCTOR;
-
- private static Constructor<?> GSS_MANAGER_IMPL_CONSTRUCTOR;
-
- static {
- try {
- init();
- IS_SUPPORTED = true;
- } catch (Exception e) {
- IS_SUPPORTED = false;
- }
- }
-
- private static void init() throws ClassNotFoundException,
- NoSuchMethodException {
- Class<?> httpCallerInfoClazz = Class
- .forName("sun.net.www.protocol.http.HttpCallerInfo"); //$NON-NLS-1$
- HTTP_CALLER_INFO_CONSTRUCTOR = httpCallerInfoClazz
- .getConstructor(URL.class);
-
- Class<?> httpCallerClazz = Class
- .forName("sun.security.jgss.HttpCaller"); //$NON-NLS-1$
- HTTP_CALLER_CONSTRUCTOR = httpCallerClazz
- .getConstructor(httpCallerInfoClazz);
-
- Class<?> gssCallerClazz = Class
- .forName("sun.security.jgss.GSSCaller"); //$NON-NLS-1$
- Class<?> gssManagerImplClazz = Class
- .forName("sun.security.jgss.GSSManagerImpl"); //$NON-NLS-1$
- GSS_MANAGER_IMPL_CONSTRUCTOR = gssManagerImplClazz
- .getConstructor(gssCallerClazz);
-
- }
-
- /**
- * Detects if SunGSSManagerProvider is supported by the system
- *
- * @return true if it is supported
- */
- public static boolean isSupported() {
- return IS_SUPPORTED;
- }
-
- @Override
- public GSSManager newInstance(URL url) {
- try {
- Object httpCallerInfo = HTTP_CALLER_INFO_CONSTRUCTOR
- .newInstance(url);
- Object httpCaller = HTTP_CALLER_CONSTRUCTOR
- .newInstance(httpCallerInfo);
-
- return (GSSManager) GSS_MANAGER_IMPL_CONSTRUCTOR
- .newInstance(httpCaller);
- } catch (InstantiationException | IllegalAccessException
- | IllegalArgumentException | InvocationTargetException e) {
- throw new Error(e);
- }
- }
- }
- }
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