/* * 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.*;import java.util.Vector;import sun.security.util.*;import java.io.IOException;import java.math.BigInteger; /** * Implements the ASN.1 KRB_KDC_REQ type. * * <xmp> * KDC-REQ              ::= SEQUENCE { *      -- NOTE: first tag is [1], not [0] *      pvno            [1] INTEGER (5) , *      msg-type        [2] INTEGER (10 -- AS -- | 12 -- TGS --), *      padata          [3] SEQUENCE OF PA-DATA OPTIONAL *                            -- NOTE: not empty --, *      req-body        [4] KDC-REQ-BODY * } * </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 KDCReq {     public KDCReqBody reqBody;    private int pvno;    private int msgType;    private PAData[] pAData = null; //optional     public KDCReq(PAData[] new_pAData, KDCReqBody new_reqBody,            int req_type) throws IOException {        pvno = Krb5.PVNO;        msgType = req_type;        if (new_pAData != null) {            pAData = new PAData[new_pAData.length];            for (int i = 0; i < new_pAData.length; i++) {                if (new_pAData[i] == null) {                    throw new IOException("Cannot create a KDCRep");                } else {                    pAData[i] = (PAData) new_pAData[i].clone();                }            }        }        reqBody = new_reqBody;    }     public KDCReq() {    }     public KDCReq(byte[] data, int req_type) throws Asn1Exception,            IOException, KrbException {        init(new DerValue(data), req_type);    }     /**     * Creates an KDCReq object from a DerValue object and asn1 type.     *     * @param der a DER value of an KDCReq object.     * @param req_type a encoded asn1 type 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.     * @exceptoin KrbErrException     */    public KDCReq(DerValue der, int req_type) throws Asn1Exception,            IOException, KrbException {        init(der, req_type);    }     /**     * Initializes a KDCReq object from a DerValue.  The DER encoding     * must be in the format specified by the KRB_KDC_REQ ASN.1 notation.     *     * @param encoding a DER-encoded KDCReq object.     * @param req_type an int indicating whether it's KRB_AS_REQ or KRB_TGS_REQ type     * @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 KrbException if an error occurs while constructing a Realm object,     * or a Krb object from DER-encoded data.     */    protected void init(DerValue encoding, int req_type) throws Asn1Exception,            IOException, KrbException {        DerValue der, subDer;        BigInteger bint;        if ((encoding.getTag() & 0x1F) != req_type) {            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() & 0x01F) == 0x01) {            bint = subDer.getData().getBigInteger();            this.pvno = bint.intValue();            if (this.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() & 0x01F) == 0x02) {            bint = subDer.getData().getBigInteger();            this.msgType = bint.intValue();            if (this.msgType != req_type) {                throw new KrbApErrException(Krb5.KRB_AP_ERR_MSG_TYPE);            }        } else {            throw new Asn1Exception(Krb5.ASN1_BAD_ID);        }        if ((der.getData().peekByte() & 0x1F) == 0x03) {            subDer = der.getData().getDerValue();            DerValue subsubDer = subDer.getData().getDerValue();            if (subsubDer.getTag() != DerValue.tag_SequenceOf) {                throw new Asn1Exception(Krb5.ASN1_BAD_ID);            }            Vector<PAData> v = new Vector<>();            while (subsubDer.getData().available() > 0) {                v.addElement(new PAData(subsubDer.getData().getDerValue()));            }            if (v.size() > 0) {                pAData = new PAData[v.size()];                v.copyInto(pAData);            }        } else {            pAData = null;        }        subDer = der.getData().getDerValue();        if ((subDer.getTag() & 0x01F) == 0x04) {            DerValue subsubDer = subDer.getData().getDerValue();            reqBody = new KDCReqBody(subsubDer, msgType);        } else {            throw new Asn1Exception(Krb5.ASN1_BAD_ID);        }    }     /**     * Encodes this object to a byte array.     *     * @return an byte array of encoded data.     * @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) 0x01), temp);        temp = new DerOutputStream();        temp.putInteger(BigInteger.valueOf(msgType));        out.write(DerValue.createTag(DerValue.TAG_CONTEXT,                true, (byte) 0x02), temp);        if (pAData != null && pAData.length > 0) {            temp = new DerOutputStream();            for (int i = 0; i < pAData.length; i++) {                temp.write(pAData[i].asn1Encode());            }            bytes = new DerOutputStream();            bytes.write(DerValue.tag_SequenceOf, temp);            out.write(DerValue.createTag(DerValue.TAG_CONTEXT,                    true, (byte) 0x03), bytes);        }        out.write(DerValue.createTag(DerValue.TAG_CONTEXT,                true, (byte) 0x04), reqBody.asn1Encode(msgType));        bytes = new DerOutputStream();        bytes.write(DerValue.tag_Sequence, out);        out = new DerOutputStream();        out.write(DerValue.createTag(DerValue.TAG_APPLICATION,                true, (byte) msgType), bytes);        return out.toByteArray();    }     public byte[] asn1EncodeReqBody() throws Asn1Exception, IOException {        return reqBody.asn1Encode(msgType);    }}