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/*
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* Copyright 2003-2004 Sun Microsystems, Inc. All Rights Reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Sun designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Sun in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*/
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package com.sun.security.sasl.gsskerb;
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import java.io.IOException;
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import java.util.Map;
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import java.util.logging.Logger;
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import java.util.logging.Level;
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import javax.security.sasl.*;
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import com.sun.security.sasl.util.AbstractSaslImpl;
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import org.ietf.jgss.*;
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abstract class GssKrb5Base extends AbstractSaslImpl {
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private static final String KRB5_OID_STR = "1.2.840.113554.1.2.2";
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protected static Oid KRB5_OID;
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protected static final byte[] EMPTY = new byte[0];
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static {
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try {
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KRB5_OID = new Oid(KRB5_OID_STR);
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} catch (GSSException ignore) {}
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}
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protected GSSContext secCtx = null;
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protected MessageProp msgProp; // QOP and privacy for unwrap
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protected static final int JGSS_QOP = 0; // unrelated to SASL QOP mask
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protected GssKrb5Base(Map props, String className) throws SaslException {
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super(props, className);
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}
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/**
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* Retrieves this mechanism's name.
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*
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* @return The string "GSSAPI".
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*/
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public String getMechanismName() {
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return "GSSAPI";
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}
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public byte[] unwrap(byte[] incoming, int start, int len)
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throws SaslException {
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if (!completed) {
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throw new IllegalStateException("GSSAPI authentication not completed");
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}
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// integrity will be true if either privacy or integrity negotiated
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if (!integrity) {
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throw new IllegalStateException("No security layer negotiated");
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}
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try {
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byte[] answer = secCtx.unwrap(incoming, start, len, msgProp);
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if (logger.isLoggable(Level.FINEST)) {
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traceOutput(myClassName, "KRB501:Unwrap", "incoming: ",
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incoming, start, len);
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traceOutput(myClassName, "KRB502:Unwrap", "unwrapped: ",
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answer, 0, answer.length);
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}
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return answer;
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} catch (GSSException e) {
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throw new SaslException("Problems unwrapping SASL buffer", e);
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}
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}
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public byte[] wrap(byte[] outgoing, int start, int len) throws SaslException {
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if (!completed) {
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throw new IllegalStateException("GSSAPI authentication not completed");
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}
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// integrity will be true if either privacy or integrity negotiated
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if (!integrity) {
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throw new IllegalStateException("No security layer negotiated");
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}
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// Generate GSS token
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try {
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byte[] answer = secCtx.wrap(outgoing, start, len, msgProp);
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if (logger.isLoggable(Level.FINEST)) {
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traceOutput(myClassName, "KRB503:Wrap", "outgoing: ",
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outgoing, start, len);
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traceOutput(myClassName, "KRB504:Wrap", "wrapped: ",
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answer, 0, answer.length);
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}
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return answer;
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} catch (GSSException e) {
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throw new SaslException("Problem performing GSS wrap", e);
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}
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}
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public void dispose() throws SaslException {
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if (secCtx != null) {
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try {
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secCtx.dispose();
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} catch (GSSException e) {
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throw new SaslException("Problem disposing GSS context", e);
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}
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secCtx = null;
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}
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}
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protected void finalize() throws Throwable {
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dispose();
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}
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}
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