190 lines
7.1 KiB
Java
190 lines
7.1 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.EncryptedData;
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import sun.security.krb5.Asn1Exception;
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import sun.security.krb5.RealmException;
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import sun.security.util.*;
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import java.util.Vector;
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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 Authenticator type.
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*
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* <pre>{@code
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* KRB-CRED ::= [APPLICATION 22] SEQUENCE {
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* pvno [0] INTEGER (5),
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* msg-type [1] INTEGER (22),
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* tickets [2] SEQUENCE OF Ticket,
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* enc-part [3] EncryptedData -- EncKrbCredPart
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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 KRBCred {
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public Ticket[] tickets = null;
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public EncryptedData encPart;
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private int pvno;
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private int msgType;
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public KRBCred(Ticket[] new_tickets, EncryptedData new_encPart) throws IOException {
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pvno = Krb5.PVNO;
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msgType = Krb5.KRB_CRED;
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if (new_tickets != null) {
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tickets = new Ticket[new_tickets.length];
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for (int i = 0; i < new_tickets.length; i++) {
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if (new_tickets[i] == null) {
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throw new IOException("Cannot create a KRBCred");
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} else {
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tickets[i] = (Ticket) new_tickets[i].clone();
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}
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}
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}
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encPart = new_encPart;
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}
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public KRBCred(byte[] data) throws Asn1Exception,
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RealmException, KrbApErrException, IOException {
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init(new DerValue(data));
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}
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public KRBCred(DerValue encoding) throws Asn1Exception,
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RealmException, KrbApErrException, IOException {
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init(encoding);
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}
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/**
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* Initializes an KRBCred object.
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* @param encoding a single DER-encoded 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 KrbApErrException if the value read from the DER-encoded data
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* stream does not match the pre-defined value.
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* @exception RealmException if an error occurs while parsing a Realm object.
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*/
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private void init(DerValue encoding) throws Asn1Exception,
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RealmException, KrbApErrException, IOException {
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if (((encoding.getTag() & (byte) 0x1F) != (byte) 0x16)
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|| (encoding.isApplication() != true)
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|| (encoding.isConstructed() != true)) {
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throw new Asn1Exception(Krb5.ASN1_BAD_ID);
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}
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DerValue der, subDer;
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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() & 0x1F) == 0x00) {
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pvno = subDer.getData().getBigInteger().intValue();
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if (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() & 0x1F) == 0x01) {
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msgType = subDer.getData().getBigInteger().intValue();
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if (msgType != Krb5.KRB_CRED) {
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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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subDer = der.getData().getDerValue();
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if ((subDer.getTag() & 0x1F) == 0x02) {
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DerValue subsubDer = subDer.getData().getDerValue();
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if (subsubDer.getTag() != DerValue.tag_SequenceOf) {
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throw new Asn1Exception(Krb5.ASN1_BAD_ID);
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}
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Vector<Ticket> v = new Vector<>();
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while (subsubDer.getData().available() > 0) {
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v.addElement(new Ticket(subsubDer.getData().getDerValue()));
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}
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if (v.size() > 0) {
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tickets = new Ticket[v.size()];
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v.copyInto(tickets);
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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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encPart = EncryptedData.parse(der.getData(), (byte) 0x03, false);
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if (der.getData().available() > 0) {
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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 an KRBCred object.
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* @return the data of encoded EncAPRepPart object.
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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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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) 0x00), 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) 0x01), temp);
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temp = new DerOutputStream();
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for (int i = 0; i < tickets.length; i++) {
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temp.write(tickets[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) 0x02), bytes);
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out.write(DerValue.createTag(DerValue.TAG_CONTEXT,
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true, (byte) 0x03), encPart.asn1Encode());
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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) 0x16), bytes);
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return out.toByteArray();
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}
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}
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