/* * Copyright (c) 2005, 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.security.jgss.wrapper; import java.util.HashMap;import java.security.Provider;import java.security.AccessController;import java.security.PrivilegedAction;import org.ietf.jgss.Oid;import sun.security.action.PutAllAction; /** * Defines the Sun NativeGSS provider for plugging in the * native GSS mechanisms to Java GSS. * * List of supported mechanisms depends on the local * machine configuration. * * @author Yu-Ching Valerie Peng */ public final class SunNativeProvider extends Provider {     private static final long serialVersionUID = -238911724858694204L;     private static final String NAME = "SunNativeGSS";    private static final String INFO = "Sun Native GSS provider";    private static final String MF_CLASS =        "sun.security.jgss.wrapper.NativeGSSFactory";    private static final String LIB_PROP = "sun.security.jgss.lib";    private static final String DEBUG_PROP = "sun.security.nativegss.debug";    private static HashMap MECH_MAP;    static final Provider INSTANCE = new SunNativeProvider();    static boolean DEBUG;    static void debug(String message) {        if (DEBUG) {            if (message == null) {                throw new NullPointerException();            }            System.out.println(NAME + ": " + message);        }    }     static {        MECH_MAP =            AccessController.doPrivileged(new PrivilegedAction<HashMap>() {                    public HashMap run() {                        DEBUG = Boolean.parseBoolean                            (System.getProperty(DEBUG_PROP));                        try {                            System.loadLibrary("j2gss");                        } catch (Error err) {                            debug("No j2gss library found!");                            if (DEBUG) err.printStackTrace();                            return null;                        }                        String gssLibs[] = new String[0];                        String defaultLib = System.getProperty(LIB_PROP);                        if (defaultLib == null || defaultLib.trim().equals("")) {                            String osname = System.getProperty("os.name");                            if (osname.startsWith("SunOS")) {                                gssLibs = new String[]{ "libgss.so" };                            } else if (osname.startsWith("Linux")) {                                gssLibs = new String[]{                                    "libgssapi.so",                                    "libgssapi_krb5.so",                                    "libgssapi_krb5.so.2",                                };                            }                        } else {                            gssLibs = new String[]{ defaultLib };                        }                        for (String libName: gssLibs) {                            if (GSSLibStub.init(libName)) {                                debug("Loaded GSS library: " + libName);                                Oid[] mechs = GSSLibStub.indicateMechs();                                HashMap<String, String> map =                                            new HashMap<String, String>();                                for (int i = 0; i < mechs.length; i++) {                                    debug("Native MF for " + mechs[i]);                                    map.put("GssApiMechanism." + mechs[i],                                            MF_CLASS);                                }                                return map;                            }                        }                        return null;                    }                });    }     public SunNativeProvider() {        /* We are the Sun NativeGSS provider */        super(NAME, 1.0, INFO);         if (MECH_MAP != null) {            AccessController.doPrivileged(new PutAllAction(this, MECH_MAP));        }    }}