147 lines · 5.6 KB · Java
RawDownload
/* * Copyright (c) 2009, 2011, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * 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. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */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. */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.     */    @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();        logger.finest("NTLMAuthenticationProxy: " + e);    }}