1 /*

     2  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     3  *

     4  * This code is free software; you can redistribute it and/or modify it

     5  * under the terms of the GNU General Public License version 2 only, as

     6  * published by the Free Software Foundation.  Oracle designates this

     7  * particular file as subject to the "Classpath" exception as provided

     8  * by Oracle in the LICENSE file that accompanied this code.

     9  *

    10  * This code is distributed in the hope that it will be useful, but WITHOUT

    11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    13  * version 2 for more details (a copy is included in the LICENSE file that

    14  * accompanied this code).

    15  *

    16  * You should have received a copy of the GNU General Public License version

    17  * 2 along with this work; if not, write to the Free Software Foundation,

    18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    19  *

    20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    21  * or visit www.oracle.com if you need additional information or have any

    22  * questions.

    23  */

    24 

    25 /*

    26  *

    27  *  (C) Copyright IBM Corp. 1999 All Rights Reserved.

    28  *  Copyright 1997 The Open Group Research Institute.  All rights reserved.

    29  */

    30 

    31 package sun.security.krb5.internal;

    32 

    33 import sun.security.util.*;

    34 import sun.security.krb5.Asn1Exception;

    35 import java.io.IOException;

    36 import java.math.BigInteger;

    37 

    38 /**

    39  * Implements the ASN.1 PAEncTSEnc type.

    40  *

    41  * <pre>{@code

    42  * PA-ENC-TS-ENC                ::= SEQUENCE {

    43  *      patimestamp     [0] KerberosTime -- client's time --,

    44  *      pausec          [1] Microseconds OPTIONAL

    45  * }

    46  * }</pre>

    47  *

    48  * <p>

    49  * This definition reflects the Network Working Group RFC 4120

    50  * specification available at

    51  * <a href="http://www.ietf.org/rfc/rfc4120.txt">

    52  * http://www.ietf.org/rfc/rfc4120.txt</a>.

    53  */

    54 

    55 public class PAEncTSEnc {

    56     public KerberosTime pATimeStamp;

    57     public Integer pAUSec; //optional

    58 

    59     public PAEncTSEnc(

    60                       KerberosTime new_pATimeStamp,

    61                       Integer new_pAUSec

    62                           ) {

    63         pATimeStamp = new_pATimeStamp;

    64         pAUSec = new_pAUSec;

    65     }

    66 

    67     public PAEncTSEnc() {

    68         KerberosTime now = KerberosTime.now();

    69         pATimeStamp = now;

    70         pAUSec = now.getMicroSeconds();

    71     }

    72 

    73     /**

    74      * Constructs a PAEncTSEnc object.

    75      * @param encoding a Der-encoded data.

    76      * @exception Asn1Exception if an error occurs while decoding an ASN1 encoded data.

    77      * @exception IOException if an I/O error occurs while reading encoded data.

    78      */

    79     public PAEncTSEnc(DerValue encoding) throws Asn1Exception, IOException {

    80         DerValue der;

    81         if (encoding.getTag() != DerValue.tag_Sequence) {

    82             throw new Asn1Exception(Krb5.ASN1_BAD_ID);

    83         }

    84         pATimeStamp = KerberosTime.parse(encoding.getData(), (byte)0x00, false);

    85         if (encoding.getData().available() > 0) {

    86             der = encoding.getData().getDerValue();

    87             if ((der.getTag() & 0x1F) == 0x01) {

    88                 pAUSec = der.getData().getBigInteger().intValue();

    89             }

    90             else throw new Asn1Exception(Krb5.ASN1_BAD_ID);

    91         }

    92         if (encoding.getData().available() > 0)

    93             throw new Asn1Exception(Krb5.ASN1_BAD_ID);

    94     }

    95 

    96 

    97     /**

    98      * Encodes a PAEncTSEnc object.

    99      * @return the byte array of encoded PAEncTSEnc object.

   100      * @exception Asn1Exception if an error occurs while decoding an ASN1 encoded data.

   101      * @exception IOException if an I/O error occurs while reading encoded data.

   102      */

   103     public byte[] asn1Encode() throws Asn1Exception, IOException {

   104         DerOutputStream bytes = new DerOutputStream();

   105         DerOutputStream temp = new DerOutputStream();

   106         bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x00), pATimeStamp.asn1Encode());

   107         if (pAUSec != null) {

   108             temp = new DerOutputStream();

   109             temp.putInteger(BigInteger.valueOf(pAUSec.intValue()));

   110             bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x01), temp);

   111         }

   112         temp = new DerOutputStream();

   113         temp.write(DerValue.tag_Sequence, bytes);

   114         return temp.toByteArray();

   115     }

   116 }