/* * 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.EncryptedData;import sun.security.krb5.Asn1Exception;import sun.security.krb5.RealmException;import sun.security.util.*;import java.util.Vector;import java.io.IOException;import java.math.BigInteger; /** * Implements the ASN.1 Authenticator type. * * <xmp> * KRB-CRED     ::= [APPLICATION 22] SEQUENCE { *      pvno            [0] INTEGER (5), *      msg-type        [1] INTEGER (22), *      tickets         [2] SEQUENCE OF Ticket, *      enc-part        [3] EncryptedData -- EncKrbCredPart * } * </xmp> * * <p> * This definition reflects the Network Working Group RFC 4120 * specification available at * <a href="http://www.ietf.org/rfc/rfc4120.txt"> * http://www.ietf.org/rfc/rfc4120.txt</a>. */public class KRBCred {     public Ticket[] tickets = null;    public EncryptedData encPart;    private int pvno;    private int msgType;     public KRBCred(Ticket[] new_tickets, EncryptedData new_encPart) throws IOException {        pvno = Krb5.PVNO;        msgType = Krb5.KRB_CRED;        if (new_tickets != null) {            tickets = new Ticket[new_tickets.length];            for (int i = 0; i < new_tickets.length; i++) {                if (new_tickets[i] == null) {                    throw new IOException("Cannot create a KRBCred");                } else {                    tickets[i] = (Ticket) new_tickets[i].clone();                }            }        }        encPart = new_encPart;    }     public KRBCred(byte[] data) throws Asn1Exception,            RealmException, KrbApErrException, IOException {        init(new DerValue(data));    }     public KRBCred(DerValue encoding) throws Asn1Exception,            RealmException, KrbApErrException, IOException {        init(encoding);    }     /**     * Initializes an KRBCred 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 KrbApErrException if the value read from the DER-encoded data     *  stream does not match the pre-defined value.     * @exception RealmException if an error occurs while parsing a Realm object.     */    private void init(DerValue encoding) throws Asn1Exception,            RealmException, KrbApErrException, IOException {        if (((encoding.getTag() & (byte) 0x1F) != (byte) 0x16)                || (encoding.isApplication() != true)                || (encoding.isConstructed() != true)) {            throw new Asn1Exception(Krb5.ASN1_BAD_ID);        }        DerValue der, subDer;        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_CRED) {                throw new KrbApErrException(Krb5.KRB_AP_ERR_MSG_TYPE);            }        } else {            throw new Asn1Exception(Krb5.ASN1_BAD_ID);        }        subDer = der.getData().getDerValue();        if ((subDer.getTag() & 0x1F) == 0x02) {            DerValue subsubDer = subDer.getData().getDerValue();            if (subsubDer.getTag() != DerValue.tag_SequenceOf) {                throw new Asn1Exception(Krb5.ASN1_BAD_ID);            }            Vector<Ticket> v = new Vector<>();            while (subsubDer.getData().available() > 0) {                v.addElement(new Ticket(subsubDer.getData().getDerValue()));            }            if (v.size() > 0) {                tickets = new Ticket[v.size()];                v.copyInto(tickets);            }        } else {            throw new Asn1Exception(Krb5.ASN1_BAD_ID);        }        encPart = EncryptedData.parse(der.getData(), (byte) 0x03, false);         if (der.getData().available() > 0) {            throw new Asn1Exception(Krb5.ASN1_BAD_ID);        }    }     /**     * Encodes an KRBCred object.     * @return the data of encoded EncAPRepPart 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, bytes, out;        temp = new DerOutputStream();        temp.putInteger(BigInteger.valueOf(pvno));        out = new DerOutputStream();        out.write(DerValue.createTag(DerValue.TAG_CONTEXT,                true, (byte) 0x00), temp);        temp = new DerOutputStream();        temp.putInteger(BigInteger.valueOf(msgType));        out.write(DerValue.createTag(DerValue.TAG_CONTEXT,                true, (byte) 0x01), temp);        temp = new DerOutputStream();        for (int i = 0; i < tickets.length; i++) {            temp.write(tickets[i].asn1Encode());        }        bytes = new DerOutputStream();        bytes.write(DerValue.tag_SequenceOf, temp);        out.write(DerValue.createTag(DerValue.TAG_CONTEXT,                true, (byte) 0x02), bytes);        out.write(DerValue.createTag(DerValue.TAG_CONTEXT,                true, (byte) 0x03), encPart.asn1Encode());        bytes = new DerOutputStream();        bytes.write(DerValue.tag_Sequence, out);        out = new DerOutputStream();        out.write(DerValue.createTag(DerValue.TAG_APPLICATION,                true, (byte) 0x16), bytes);        return out.toByteArray();    }}