/*
* 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
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*/
/*
* (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);
subDer = der.getData().getDerValue();
if ((subDer.getTag() & 0x01F) == 0x03) {
DerValue subsubDer = subDer.getData().getDerValue();
if (subsubDer.getTag() != DerValue.tag_SequenceOf) {
throw new Asn1Exception(Krb5.ASN1_BAD_ID);
}
Vector<PAData> v = new Vector<PAData> ();
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);
}
}