178 lines
6.8 KiB
Java
178 lines
6.8 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.util.*;
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import sun.security.krb5.Asn1Exception;
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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 KRBSafeBody type.
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*
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* <pre>{@code
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* KRB-SAFE-BODY ::= SEQUENCE {
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* user-data [0] OCTET STRING,
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* timestamp [1] KerberosTime OPTIONAL,
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* usec [2] Microseconds OPTIONAL,
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* seq-number [3] UInt32 OPTIONAL,
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* s-address [4] HostAddress,
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* r-address [5] HostAddress OPTIONAL
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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 KRBSafeBody {
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public byte[] userData = null;
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public KerberosTime timestamp; //optional
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public Integer usec; //optional
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public Integer seqNumber; //optional
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public HostAddress sAddress;
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public HostAddress rAddress; //optional
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public KRBSafeBody(
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byte[] new_userData,
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KerberosTime new_timestamp,
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Integer new_usec,
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Integer new_seqNumber,
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HostAddress new_sAddress,
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HostAddress new_rAddress
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) {
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if (new_userData != null) {
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userData = new_userData.clone();
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}
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timestamp = new_timestamp;
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usec = new_usec;
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seqNumber = new_seqNumber;
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sAddress = new_sAddress;
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rAddress = new_rAddress;
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}
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/**
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* Constructs a KRBSafeBody object.
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* @param encoding a Der-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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public KRBSafeBody(DerValue encoding) throws Asn1Exception, IOException {
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DerValue der;
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if (encoding.getTag() != DerValue.tag_Sequence) {
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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() & 0x1F) == 0x00) {
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userData = der.getData().getOctetString();
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}
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else
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throw new Asn1Exception(Krb5.ASN1_BAD_ID);
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timestamp = KerberosTime.parse(encoding.getData(), (byte)0x01, true);
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if ((encoding.getData().peekByte() & 0x1F) == 0x02) {
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der = encoding.getData().getDerValue();
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usec = new Integer(der.getData().getBigInteger().intValue());
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}
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if ((encoding.getData().peekByte() & 0x1F) == 0x03) {
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der = encoding.getData().getDerValue();
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seqNumber = new Integer(der.getData().getBigInteger().intValue());
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}
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sAddress = HostAddress.parse(encoding.getData(), (byte)0x04, false);
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if (encoding.getData().available() > 0)
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rAddress = HostAddress.parse(encoding.getData(), (byte)0x05, true);
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if (encoding.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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* Encodes an KRBSafeBody object.
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* @return the byte array of encoded KRBSafeBody 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 bytes = new DerOutputStream();
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DerOutputStream temp = new DerOutputStream();
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temp.putOctetString(userData);
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bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x00), temp);
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if (timestamp != null)
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bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x01), timestamp.asn1Encode());
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if (usec != null) {
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temp = new DerOutputStream();
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temp.putInteger(BigInteger.valueOf(usec.intValue()));
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bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x02), temp);
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}
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if (seqNumber != null) {
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temp = new DerOutputStream();
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// encode as an unsigned integer (UInt32)
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temp.putInteger(BigInteger.valueOf(seqNumber.longValue()));
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bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x03), temp);
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}
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bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x04), sAddress.asn1Encode());
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if (rAddress != null)
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temp = new DerOutputStream();
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temp.write(DerValue.tag_Sequence, bytes);
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return temp.toByteArray();
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}
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/**
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* Parse (unmarshal) a KRBSafeBody from a DER input stream. This form
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* parsing might be used when expanding a value which is part of
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* a constructed sequence and uses explicitly tagged type.
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*
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* @exception Asn1Exception on error.
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* @param data the Der input stream value, which contains one or more marshaled value.
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* @param explicitTag tag number.
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* @param optional indicates if this data field is optional
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* @return an instance of KRBSafeBody.
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*
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*/
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public static KRBSafeBody parse(DerInputStream data, byte explicitTag, boolean optional) throws Asn1Exception, IOException {
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if ((optional) && (((byte)data.peekByte() & (byte)0x1F) != explicitTag))
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return null;
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DerValue der = data.getDerValue();
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if (explicitTag != (der.getTag() & (byte)0x1F))
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throw new Asn1Exception(Krb5.ASN1_BAD_ID);
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else {
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DerValue subDer = der.getData().getDerValue();
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return new KRBSafeBody(subDer);
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}
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}
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}
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