/*
* 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 sun.security.util.*;
import java.util.Vector;
import java.io.IOException;
import java.math.BigInteger;
/**
* Implements the ASN.1 EncAPRepPart type.
*
* <xmp>
* EncAPRepPart ::= [APPLICATION 27] SEQUENCE {
* ctime [0] KerberosTime,
* cusec [1] Microseconds,
* subkey [2] EncryptionKey OPTIONAL,
* seq-number [3] UInt32 OPTIONAL
* }
* </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 EncAPRepPart {
public KerberosTime ctime;
public int cusec;
EncryptionKey subKey; //optional
Integer seqNumber; //optional
public EncAPRepPart(
KerberosTime new_ctime,
int new_cusec,
EncryptionKey new_subKey,
Integer new_seqNumber) {
ctime = new_ctime;
cusec = new_cusec;
subKey = new_subKey;
seqNumber = new_seqNumber;
}
public EncAPRepPart(byte[] data)
throws Asn1Exception, IOException {
init(new DerValue(data));
}
public EncAPRepPart(DerValue encoding)
throws Asn1Exception, IOException {
init(encoding);
}
/**
* Initializes an EncaPRepPart object.
* @param encoding a single DER-encoded 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.
*/
private void init(DerValue encoding) throws Asn1Exception, IOException {
DerValue der, subDer;
if (((encoding.getTag() & (byte) 0x1F) != (byte) 0x1B)
|| (encoding.isApplication() != true)
|| (encoding.isConstructed() != true)) {
throw new Asn1Exception(Krb5.ASN1_BAD_ID);
}
der = encoding.getData().getDerValue();
if (der.getTag() != DerValue.tag_Sequence) {
throw new Asn1Exception(Krb5.ASN1_BAD_ID);
}
ctime = KerberosTime.parse(der.getData(), (byte) 0x00, true);
subDer = der.getData().getDerValue();
if ((subDer.getTag() & (byte) 0x1F) == (byte) 0x01) {
cusec = subDer.getData().getBigInteger().intValue();
} else {
throw new Asn1Exception(Krb5.ASN1_BAD_ID);
}
if (der.getData().available() > 0) {
subKey = EncryptionKey.parse(der.getData(), (byte) 0x02, true);
} else {
subKey = null;
seqNumber = null;
}
if (der.getData().available() > 0) {
subDer = der.getData().getDerValue();
if ((subDer.getTag() & 0x1F) != 0x03) {
throw new Asn1Exception(Krb5.ASN1_BAD_ID);
}
seqNumber = new Integer(subDer.getData().getBigInteger().intValue());
} else {
seqNumber = null;
}
if (der.getData().available() > 0) {
throw new Asn1Exception(Krb5.ASN1_BAD_ID);
}
}
/**
* Encodes an EncAPRepPart object.
* @return byte array of encoded EncAPRepPart object.
* @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 {
Vector<DerValue> v = new Vector<>();
DerOutputStream temp = new DerOutputStream();
v.addElement(new DerValue(DerValue.createTag(DerValue.TAG_CONTEXT,
true, (byte) 0x00), ctime.asn1Encode()));
temp.putInteger(BigInteger.valueOf(cusec));
v.addElement(new DerValue(DerValue.createTag(DerValue.TAG_CONTEXT,
true, (byte) 0x01), temp.toByteArray()));
if (subKey != null) {
v.addElement(new DerValue(DerValue.createTag(DerValue.TAG_CONTEXT,
true, (byte) 0x02), subKey.asn1Encode()));
}
if (seqNumber != null) {
temp = new DerOutputStream();
// encode as an unsigned integer (UInt32)
temp.putInteger(BigInteger.valueOf(seqNumber.longValue()));
v.addElement(new DerValue(DerValue.createTag(DerValue.TAG_CONTEXT,
true, (byte) 0x03), temp.toByteArray()));
}
DerValue der[] = new DerValue[v.size()];
v.copyInto(der);
temp = new DerOutputStream();
temp.putSequence(der);
DerOutputStream out = new DerOutputStream();
out.write(DerValue.createTag(DerValue.TAG_APPLICATION,
true, (byte) 0x1B), temp);
return out.toByteArray();
}
public final EncryptionKey getSubKey() {
return subKey;
}
public final Integer getSeqNumber() {
return seqNumber;
}
}