/* * Copyright (c) 2005, 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.Hashtable;import org.ietf.jgss.Oid;import org.ietf.jgss.GSSName;import org.ietf.jgss.ChannelBinding;import org.ietf.jgss.MessageProp;import org.ietf.jgss.GSSException;import sun.security.jgss.GSSUtil; /** * This class is essentially a JNI calling stub for all wrapper classes. * * @author Valerie Peng * @since 1.6 */ class GSSLibStub {     private Oid mech;    private long pMech;     /**     * Initialization routine to dynamically load function pointers.     *     * @param library name to dlopen     * @return true if succeeded, false otherwise.     */    static native boolean init(String lib);    private static native long getMechPtr(byte[] oidDerEncoding);     // Miscellaneous routines    static native Oid[] indicateMechs();    native Oid[] inquireNamesForMech() throws GSSException;     // Name related routines    native void releaseName(long pName);    native long importName(byte[] name, Oid type);    native boolean compareName(long pName1, long pName2);    native long canonicalizeName(long pName);    native byte[] exportName(long pName) throws GSSException;    native Object[] displayName(long pName) throws GSSException;     // Credential related routines    native long acquireCred(long pName, int lifetime, int usage)                                        throws GSSException;    native long releaseCred(long pCred);    native long getCredName(long pCred);    native int getCredTime(long pCred);    native int getCredUsage(long pCred);     // Context related routines    native NativeGSSContext importContext(byte[] interProcToken);    native byte[] initContext(long pCred, long targetName, ChannelBinding cb,                              byte[] inToken, NativeGSSContext context);    native byte[] acceptContext(long pCred, ChannelBinding cb,                                byte[] inToken, NativeGSSContext context);    native long[] inquireContext(long pContext);    native Oid getContextMech(long pContext);    native long getContextName(long pContext, boolean isSrc);    native int getContextTime(long pContext);    native long deleteContext(long pContext);    native int wrapSizeLimit(long pContext, int flags, int qop, int outSize);    native byte[] exportContext(long pContext);    native byte[] getMic(long pContext, int qop, byte[] msg);    native void verifyMic(long pContext, byte[] token, byte[] msg,                          MessageProp prop) ;    native byte[] wrap(long pContext, byte[] msg, MessageProp prop);    native byte[] unwrap(long pContext, byte[] msgToken, MessageProp prop);     private static Hashtable<Oid, GSSLibStub>        table = new Hashtable<Oid, GSSLibStub>(5);     static GSSLibStub getInstance(Oid mech) throws GSSException {        GSSLibStub s = table.get(mech);        if (s == null) {            s = new GSSLibStub(mech);            table.put(mech, s);        }        return s;    }    private GSSLibStub(Oid mech) throws GSSException {        SunNativeProvider.debug("Created GSSLibStub for mech " + mech);        this.mech = mech;        this.pMech = getMechPtr(mech.getDER());    }    public boolean equals(Object obj) {        if (obj == this) return true;        if (!(obj instanceof GSSLibStub)) {            return false;        }        return (mech.equals(((GSSLibStub) obj).getMech()));    }    public int hashCode() {        return mech.hashCode();    }    Oid getMech() {        return mech;    }}