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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, Stepan M. Mishura
     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 GeneralizedTime type.
     32  *
     33  * @see http://asn1.elibel.tm.fr/en/standards/index.htm
     34  */
     35 public final class ASN1GeneralizedTime extends ASN1Time {
     36 
     37     // default implementation
     38     private static final ASN1GeneralizedTime ASN1 = new ASN1GeneralizedTime();
     39 
     40     /**
     41      * Constructs ASN.1 GeneralizedTime type
     42      *
     43      * The constructor is provided for inheritance purposes
     44      * when there is a need to create a custom ASN.1 GeneralizedTime type.
     45      * To get a default implementation it is recommended to use
     46      * getInstance() method.
     47      */
     48     public ASN1GeneralizedTime() {
     49         super(TAG_GENERALIZEDTIME);
     50     }
     51 
     52     /**
     53      * Returns ASN.1 GeneralizedTime type default implementation
     54      *
     55      * The default implementation works with encoding
     56      * that is represented as Date object.
     57      *
     58      * @return ASN.1 GeneralizedTime type default implementation
     59      */
     60     public static ASN1GeneralizedTime getInstance() {
     61         return ASN1;
     62     }
     63 
     64     public Object decode(BerInputStream in) throws IOException {
     65         in.readGeneralizedTime();
     66 
     67         if (in.isVerify) {
     68             return null;
     69         }
     70         return getDecodedObject(in);
     71     }
     72 
     73     public void encodeContent(BerOutputStream out) {
     74         out.encodeGeneralizedTime();
     75     }
     76 
     77     // FIXME support only one format for encoding, do we need others?
     78     //
     79     // According to X.680:
     80     // four digit year, seconds always presented
     81     // and fractional-seconds elements without
     82     // trailing 0's (must be cut later from content)
     83     private static final String GEN_PATTERN = "yyyyMMddHHmmss.SSS";
     84 
     85     public void setEncodingContent(BerOutputStream out) {
     86         SimpleDateFormat sdf = new SimpleDateFormat(GEN_PATTERN);
     87         sdf.setTimeZone(TimeZone.getTimeZone("UTC"));
     88         String temp = sdf.format(out.content);
     89         // cut off trailing 0s
     90         int nullId;
     91         int currLength;
     92         while (((nullId = temp.lastIndexOf('0', currLength = temp.length() - 1)) != -1)
     93                 & (nullId == currLength)) {
     94             temp = temp.substring(0, nullId);
     95         }
     96         // deal with point (cut off if it is last char)
     97         if (temp.charAt(currLength) == '.') {
     98             temp = temp.substring(0, currLength);
     99         }
    100 
    101         out.content = (temp + "Z").getBytes(Charsets.UTF_8);
    102         out.length = ((byte[]) out.content).length;
    103     }
    104 }
    105