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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.StandardCharsets;
     27 import java.text.SimpleDateFormat;
     28 import java.util.Locale;
     29 import java.util.TimeZone;
     30 
     31 /**
     32  * This class represents ASN.1 UTCTime type
     33  *
     34  * @see http://asn1.elibel.tm.fr/en/standards/index.htm
     35  */
     36 public final class ASN1UTCTime extends ASN1Time {
     37 
     38     /** Length for the pattern: YYMMDDhhmm'Z' */
     39     public static final int UTC_HM = 11;
     40 
     41     /** Length for the pattern: YYMMDDhhmmss'Z' */
     42     public static final int UTC_HMS = 13;
     43 
     44     /** Length for the pattern: YYMMDDhhmm('+'/'-')hhmm */
     45     public static final int UTC_LOCAL_HM = 15;
     46 
     47     /** Length for the pattern: YYMMDDhhmmss('+'/'-')hhmm */
     48     public static final int UTC_LOCAL_HMS = 17;
     49 
     50     /** default implementation */
     51     private static final ASN1UTCTime ASN1 = new ASN1UTCTime();
     52 
     53     /**
     54      * Constructs ASN.1 UTCTime type
     55      *
     56      * The constructor is provided for inheritance purposes
     57      * when there is a need to create a custom ASN.1 UTCTime type.
     58      * To get a default implementation it is recommended to use
     59      * getInstance() method.
     60      */
     61     public ASN1UTCTime() {
     62         super(TAG_UTCTIME);
     63     }
     64 
     65     /**
     66      * Returns ASN.1 UTCTime type default implementation
     67      *
     68      * The default implementation works with encoding
     69      * that is represented as Date object.
     70      *
     71      * @return ASN.1 UTCTime type default implementation
     72      */
     73     public static ASN1UTCTime getInstance() {
     74         return ASN1;
     75     }
     76 
     77     @Override public Object decode(BerInputStream in) throws IOException {
     78         in.readUTCTime();
     79 
     80         if (in.isVerify) {
     81             return null;
     82         }
     83         return getDecodedObject(in);
     84     }
     85 
     86     @Override public void encodeContent(BerOutputStream out) {
     87         out.encodeUTCTime();
     88     }
     89 
     90     // FIXME support only one format for encoding, do we need others?
     91     //
     92     // According to X.680 coordinated universal time format:
     93     // two digit year, seconds always presented,
     94     // no fractional-seconds elements, 'Z' at the end
     95     private static final String UTC_PATTERN = "yyMMddHHmmss'Z'";
     96 
     97     @Override public void setEncodingContent(BerOutputStream out) {
     98         SimpleDateFormat sdf = new SimpleDateFormat(UTC_PATTERN, Locale.US);
     99         sdf.setTimeZone(TimeZone.getTimeZone("UTC"));
    100         out.content = sdf.format(out.content).getBytes(StandardCharsets.UTF_8);
    101         out.length = ((byte[]) out.content).length;
    102     }
    103 }
    104