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      1 /*
      2  *  Licensed to the Apache Software Foundation (ASF) under one or more
      3  *  contributor license agreements.  See the NOTICE file distributed with
      4  *  this work for additional information regarding copyright ownership.
      5  *  The ASF licenses this file to You under the Apache License, Version 2.0
      6  *  (the "License"); you may not use this file except in compliance with
      7  *  the License.  You may obtain a copy of the License at
      8  *
      9  *     http://www.apache.org/licenses/LICENSE-2.0
     10  *
     11  *  Unless required by applicable law or agreed to in writing, software
     12  *  distributed under the License is distributed on an "AS IS" BASIS,
     13  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     14  *  See the License for the specific language governing permissions and
     15  *  limitations under the License.
     16  */
     17 
     18 /**
     19 * @author Vladimir N. Molotkov
     20 * @version $Revision$
     21 */
     22 
     23 package org.apache.harmony.security.asn1;
     24 
     25 import java.io.IOException;
     26 import java.nio.charset.Charsets;
     27 import java.text.SimpleDateFormat;
     28 import java.util.TimeZone;
     29 
     30 /**
     31  * This class represents ASN.1 UTCTime type
     32  *
     33  * @see http://asn1.elibel.tm.fr/en/standards/index.htm
     34  */
     35 public final class ASN1UTCTime extends ASN1Time {
     36 
     37     /** Length for the pattern: YYMMDDhhmm'Z' */
     38     public static final int UTC_HM = 11;
     39 
     40     /** Length for the pattern: YYMMDDhhmmss'Z' */
     41     public static final int UTC_HMS = 13;
     42 
     43     /** Length for the pattern: YYMMDDhhmm('+'/'-')hhmm */
     44     public static final int UTC_LOCAL_HM = 15;
     45 
     46     /** Length for the pattern: YYMMDDhhmmss('+'/'-')hhmm */
     47     public static final int UTC_LOCAL_HMS = 17;
     48 
     49     /** default implementation */
     50     private static final ASN1UTCTime ASN1 = new ASN1UTCTime();
     51 
     52     /**
     53      * Constructs ASN.1 UTCTime type
     54      *
     55      * The constructor is provided for inheritance purposes
     56      * when there is a need to create a custom ASN.1 UTCTime type.
     57      * To get a default implementation it is recommended to use
     58      * getInstance() method.
     59      */
     60     public ASN1UTCTime() {
     61         super(TAG_UTCTIME);
     62     }
     63 
     64     /**
     65      * Returns ASN.1 UTCTime type default implementation
     66      *
     67      * The default implementation works with encoding
     68      * that is represented as Date object.
     69      *
     70      * @return ASN.1 UTCTime type default implementation
     71      */
     72     public static ASN1UTCTime getInstance() {
     73         return ASN1;
     74     }
     75 
     76     @Override public Object decode(BerInputStream in) throws IOException {
     77         in.readUTCTime();
     78 
     79         if (in.isVerify) {
     80             return null;
     81         }
     82         return getDecodedObject(in);
     83     }
     84 
     85     @Override public void encodeContent(BerOutputStream out) {
     86         out.encodeUTCTime();
     87     }
     88 
     89     // FIXME support only one format for encoding, do we need others?
     90     //
     91     // According to X.680 coordinated universal time format:
     92     // two digit year, seconds always presented,
     93     // no fractional-seconds elements, 'Z' at the end
     94     private static final String UTC_PATTERN = "yyMMddHHmmss'Z'";
     95 
     96     @Override public void setEncodingContent(BerOutputStream out) {
     97         SimpleDateFormat sdf = new SimpleDateFormat(UTC_PATTERN);
     98         sdf.setTimeZone(TimeZone.getTimeZone("UTC"));
     99         out.content = sdf.format(out.content).getBytes(Charsets.UTF_8);
    100         out.length = ((byte[]) out.content).length;
    101     }
    102 }
    103