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 * Copyright (c) 2009, 2011, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * This code is free software; you can redistribute it and/or modify it
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 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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package sun.net.www.protocol.http;

import java.net.URL;
import java.net.PasswordAuthentication;
import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
import sun.util.logging.PlatformLogger;

Proxy class for loading NTLMAuthentication, so as to remove static dependancy.
/** * Proxy class for loading NTLMAuthentication, so as to remove static * dependancy. */
class NTLMAuthenticationProxy { private static Method supportsTA; private static Method isTrustedSite; private static final String clazzStr = "sun.net.www.protocol.http.ntlm.NTLMAuthentication"; private static final String supportsTAStr = "supportsTransparentAuth"; private static final String isTrustedSiteStr = "isTrustedSite"; static final NTLMAuthenticationProxy proxy = tryLoadNTLMAuthentication(); static final boolean supported = proxy != null ? true : false; static final boolean supportsTransparentAuth = supported ? supportsTransparentAuth() : false; private final Constructor<? extends AuthenticationInfo> threeArgCtr; private final Constructor<? extends AuthenticationInfo> fiveArgCtr; private NTLMAuthenticationProxy(Constructor<? extends AuthenticationInfo> threeArgCtr, Constructor<? extends AuthenticationInfo> fiveArgCtr) { this.threeArgCtr = threeArgCtr; this.fiveArgCtr = fiveArgCtr; } AuthenticationInfo create(boolean isProxy, URL url, PasswordAuthentication pw) { try { return threeArgCtr.newInstance(isProxy, url, pw); } catch (ReflectiveOperationException roe) { finest(roe); } return null; } AuthenticationInfo create(boolean isProxy, String host, int port, PasswordAuthentication pw) { try { return fiveArgCtr.newInstance(isProxy, host, port, pw); } catch (ReflectiveOperationException roe) { finest(roe); } return null; } /* Returns true if the NTLM implementation supports transparent * authentication (try with the current users credentials before * prompting for username and password, etc). */ private static boolean supportsTransparentAuth() { try { return (Boolean)supportsTA.invoke(null); } catch (ReflectiveOperationException roe) { finest(roe); } return false; } /* Transparent authentication should only be tried with a trusted * site ( when running in a secure environment ). */ public static boolean isTrustedSite(URL url) { try { return (Boolean)isTrustedSite.invoke(null, url); } catch (ReflectiveOperationException roe) { finest(roe); } return false; }
Loads the NTLM authentiation implementation through reflection. If the class is present, then it must have the required constructors and method. Otherwise, it is considered an error.
/** * Loads the NTLM authentiation implementation through reflection. If * the class is present, then it must have the required constructors and * method. Otherwise, it is considered an error. */
@SuppressWarnings("unchecked") private static NTLMAuthenticationProxy tryLoadNTLMAuthentication() { Class<? extends AuthenticationInfo> cl; Constructor<? extends AuthenticationInfo> threeArg, fiveArg; try { cl = (Class<? extends AuthenticationInfo>)Class.forName(clazzStr, true, null); if (cl != null) { threeArg = cl.getConstructor(boolean.class, URL.class, PasswordAuthentication.class); fiveArg = cl.getConstructor(boolean.class, String.class, int.class, PasswordAuthentication.class); supportsTA = cl.getDeclaredMethod(supportsTAStr); isTrustedSite = cl.getDeclaredMethod(isTrustedSiteStr, java.net.URL.class); return new NTLMAuthenticationProxy(threeArg, fiveArg); } } catch (ClassNotFoundException cnfe) { finest(cnfe); } catch (ReflectiveOperationException roe) { throw new AssertionError(roe); } return null; } static void finest(Exception e) { PlatformLogger logger = HttpURLConnection.getHttpLogger(); if (logger.isLoggable(PlatformLogger.Level.FINEST)) { logger.finest("NTLMAuthenticationProxy: " + e); } } }