/* * 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. */ /* * *  (C) Copyright IBM Corp. 1999 All Rights Reserved. *  Copyright 1997 The Open Group Research Institute.  All rights reserved. */ package sun.security.krb5.internal; import sun.security.krb5.Checksum;import sun.security.krb5.Asn1Exception;import sun.security.krb5.RealmException;import sun.security.util.*;import java.io.IOException;import java.math.BigInteger; /** * Implements the ASN.1 KRBSafe type. * * <xmp> * KRB-SAFE        ::= [APPLICATION 20] SEQUENCE { *         pvno            [0] INTEGER (5), *         msg-type        [1] INTEGER (20), *         safe-body       [2] KRB-SAFE-BODY, *         cksum           [3] Checksum * } * </xmp> * * <p> * This definition reflects the Network Working Group RFC 4120 * specifications available at * <a href="http://www.ietf.org/rfc/rfc4120.txt"> * http://www.ietf.org/rfc/rfc4120.txt</a>. */ public class KRBSafe {    public int pvno;    public int msgType;    public KRBSafeBody safeBody;    public Checksum cksum;     public KRBSafe(KRBSafeBody new_safeBody, Checksum new_cksum) {        pvno = Krb5.PVNO;        msgType = Krb5.KRB_SAFE;        safeBody = new_safeBody;        cksum = new_cksum;    }     public KRBSafe(byte[] data) throws Asn1Exception,    RealmException, KrbApErrException, IOException {        init(new DerValue(data));    }     public KRBSafe(DerValue encoding) throws Asn1Exception,    RealmException, KrbApErrException, IOException {        init(encoding);    }     /**     * Initializes an KRBSafe object.     * @param encoding a single DER-encoded value.     * @exception Asn1Exception if an error occurs while decoding an ASN1 encoded data.     * @exception IOException if an I/O error occurs while reading encoded data.     * @exception RealmException if an error occurs while parsing a Realm object.     * @exception KrbApErrException if the value read from the DER-encoded data     *  stream does not match the pre-defined value.     */    private void init(DerValue encoding) throws Asn1Exception,    RealmException, KrbApErrException, IOException {        DerValue der, subDer;        if (((encoding.getTag() & (byte)0x1F) != (byte)0x14)            || (encoding.isApplication() != true)            || (encoding.isConstructed() != true))            throw new Asn1Exception(Krb5.ASN1_BAD_ID);        der = encoding.getData().getDerValue();        if (der.getTag() != DerValue.tag_Sequence)            throw new Asn1Exception(Krb5.ASN1_BAD_ID);        subDer = der.getData().getDerValue();        if ((subDer.getTag() & 0x1F) == 0x00) {            pvno = subDer.getData().getBigInteger().intValue();            if (pvno != Krb5.PVNO)                throw new KrbApErrException(Krb5.KRB_AP_ERR_BADVERSION);        }        else            throw new Asn1Exception(Krb5.ASN1_BAD_ID);        subDer = der.getData().getDerValue();        if ((subDer.getTag() & 0x1F) == 0x01) {            msgType = subDer.getData().getBigInteger().intValue();            if (msgType != Krb5.KRB_SAFE)                throw new KrbApErrException(Krb5.KRB_AP_ERR_MSG_TYPE);        }         else            throw new Asn1Exception(Krb5.ASN1_BAD_ID);        safeBody = KRBSafeBody.parse(der.getData(), (byte)0x02, false);        cksum = Checksum.parse(der.getData(), (byte)0x03, false);        if (der.getData().available() > 0)            throw new Asn1Exception(Krb5.ASN1_BAD_ID);    }     /**     * Encodes an KRBSafe object.     * @return byte array of encoded KRBSafe object.     * @exception Asn1Exception if an error occurs while decoding an ASN1 encoded data.     * @exception IOException if an I/O error occurs while reading encoded data.     */    public byte[] asn1Encode() throws Asn1Exception, IOException {        DerOutputStream temp = new DerOutputStream();        DerOutputStream bytes = new DerOutputStream();        temp.putInteger(BigInteger.valueOf(pvno));        bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x00), temp);        temp = new DerOutputStream();        temp.putInteger(BigInteger.valueOf(msgType));        bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x01), temp);        bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x02), safeBody.asn1Encode());        bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x03), cksum.asn1Encode());        temp = new DerOutputStream();        temp.write(DerValue.tag_Sequence, bytes);        bytes = new DerOutputStream();        bytes.write(DerValue.createTag(DerValue.TAG_APPLICATION, true, (byte)0x14), temp);        return bytes.toByteArray();    }}