200 lines
7.4 KiB
Java
200 lines
7.4 KiB
Java
/*
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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. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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*
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* (C) Copyright IBM Corp. 1999 All Rights Reserved.
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* Copyright 1997 The Open Group Research Institute. All rights reserved.
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*/
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package sun.security.krb5.internal;
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import sun.security.krb5.*;
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import java.util.Vector;
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import sun.security.util.*;
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import java.io.IOException;
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import java.math.BigInteger;
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/**
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* Implements the ASN.1 KRB_KDC_REQ type.
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*
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* <pre>{@code
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* KDC-REQ ::= SEQUENCE {
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* -- NOTE: first tag is [1], not [0]
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* pvno [1] INTEGER (5) ,
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* msg-type [2] INTEGER (10 -- AS -- | 12 -- TGS --),
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* padata [3] SEQUENCE OF PA-DATA OPTIONAL
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* -- NOTE: not empty --,
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* req-body [4] KDC-REQ-BODY
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* }
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* }</pre>
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*
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* <p>
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* This definition reflects the Network Working Group RFC 4120
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* specification available at
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* <a href="http://www.ietf.org/rfc/rfc4120.txt">
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* http://www.ietf.org/rfc/rfc4120.txt</a>.
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*/
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public class KDCReq {
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public KDCReqBody reqBody;
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public PAData[] pAData = null; //optional
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private int pvno;
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private int msgType;
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public KDCReq(PAData[] new_pAData, KDCReqBody new_reqBody,
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int req_type) throws IOException {
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pvno = Krb5.PVNO;
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msgType = req_type;
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if (new_pAData != null) {
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pAData = new PAData[new_pAData.length];
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for (int i = 0; i < new_pAData.length; i++) {
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if (new_pAData[i] == null) {
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throw new IOException("Cannot create a KDCRep");
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} else {
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pAData[i] = (PAData) new_pAData[i].clone();
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}
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}
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}
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reqBody = new_reqBody;
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}
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public KDCReq() {
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}
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public KDCReq(byte[] data, int req_type) throws Asn1Exception,
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IOException, KrbException {
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init(new DerValue(data), req_type);
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}
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/**
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* Creates an KDCReq object from a DerValue object and asn1 type.
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*
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* @param der a DER value of an KDCReq object.
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* @param req_type a encoded asn1 type value.
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* @exception Asn1Exception if an error occurs while decoding an ASN1 encoded data.
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* @exception IOException if an I/O error occurs while reading encoded data.
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* @exception KrbErrException
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*/
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public KDCReq(DerValue der, int req_type) throws Asn1Exception,
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IOException, KrbException {
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init(der, req_type);
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}
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/**
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* Initializes a KDCReq object from a DerValue. The DER encoding
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* must be in the format specified by the KRB_KDC_REQ ASN.1 notation.
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*
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* @param encoding a DER-encoded KDCReq object.
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* @param req_type an int indicating whether it's KRB_AS_REQ or KRB_TGS_REQ type
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* @exception Asn1Exception if an error occurs while decoding an ASN1 encoded data.
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* @exception IOException if an I/O error occurs while reading encoded data.
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* @exception KrbException if an error occurs while constructing a Realm object,
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* or a Krb object from DER-encoded data.
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*/
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protected void init(DerValue encoding, int req_type) throws Asn1Exception,
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IOException, KrbException {
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DerValue der, subDer;
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BigInteger bint;
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if ((encoding.getTag() & 0x1F) != req_type) {
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throw new Asn1Exception(Krb5.ASN1_BAD_ID);
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}
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der = encoding.getData().getDerValue();
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if (der.getTag() != DerValue.tag_Sequence) {
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throw new Asn1Exception(Krb5.ASN1_BAD_ID);
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}
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subDer = der.getData().getDerValue();
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if ((subDer.getTag() & 0x01F) == 0x01) {
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bint = subDer.getData().getBigInteger();
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this.pvno = bint.intValue();
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if (this.pvno != Krb5.PVNO) {
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throw new KrbApErrException(Krb5.KRB_AP_ERR_BADVERSION);
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}
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} else {
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throw new Asn1Exception(Krb5.ASN1_BAD_ID);
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}
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subDer = der.getData().getDerValue();
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if ((subDer.getTag() & 0x01F) == 0x02) {
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bint = subDer.getData().getBigInteger();
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this.msgType = bint.intValue();
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if (this.msgType != req_type) {
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throw new KrbApErrException(Krb5.KRB_AP_ERR_MSG_TYPE);
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}
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} else {
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throw new Asn1Exception(Krb5.ASN1_BAD_ID);
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}
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pAData = PAData.parseSequence(der.getData(), (byte) 0x03, true);
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subDer = der.getData().getDerValue();
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if ((subDer.getTag() & 0x01F) == 0x04) {
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DerValue subsubDer = subDer.getData().getDerValue();
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reqBody = new KDCReqBody(subsubDer, msgType);
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} else {
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throw new Asn1Exception(Krb5.ASN1_BAD_ID);
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}
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}
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/**
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* Encodes this object to a byte array.
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*
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* @return an byte array of encoded data.
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* @exception Asn1Exception if an error occurs while decoding an ASN1 encoded data.
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* @exception IOException if an I/O error occurs while reading encoded data.
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*
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*/
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public byte[] asn1Encode() throws Asn1Exception, IOException {
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DerOutputStream temp, bytes, out;
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temp = new DerOutputStream();
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temp.putInteger(BigInteger.valueOf(pvno));
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out = new DerOutputStream();
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out.write(DerValue.createTag(DerValue.TAG_CONTEXT,
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true, (byte) 0x01), temp);
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temp = new DerOutputStream();
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temp.putInteger(BigInteger.valueOf(msgType));
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out.write(DerValue.createTag(DerValue.TAG_CONTEXT,
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true, (byte) 0x02), temp);
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if (pAData != null && pAData.length > 0) {
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temp = new DerOutputStream();
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for (int i = 0; i < pAData.length; i++) {
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temp.write(pAData[i].asn1Encode());
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}
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bytes = new DerOutputStream();
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bytes.write(DerValue.tag_SequenceOf, temp);
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out.write(DerValue.createTag(DerValue.TAG_CONTEXT,
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true, (byte) 0x03), bytes);
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}
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out.write(DerValue.createTag(DerValue.TAG_CONTEXT,
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true, (byte) 0x04), reqBody.asn1Encode(msgType));
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bytes = new DerOutputStream();
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bytes.write(DerValue.tag_Sequence, out);
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out = new DerOutputStream();
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out.write(DerValue.createTag(DerValue.TAG_APPLICATION,
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true, (byte) msgType), bytes);
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return out.toByteArray();
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}
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public byte[] asn1EncodeReqBody() throws Asn1Exception, IOException {
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return reqBody.asn1Encode(msgType);
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}
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}
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