Home | History | Annotate | Download | only in asn1 
      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 
     36 public class ASN1GeneralizedTime extends ASN1Time {
     37 
     38     // default implementation
     39     private static final ASN1GeneralizedTime ASN1 = new ASN1GeneralizedTime();
     40 
     41     /**
     42      * Constructs ASN.1 GeneralizedTime type
     43      *
     44      * The constructor is provided for inheritance purposes
     45      * when there is a need to create a custom ASN.1 GeneralizedTime type.
     46      * To get a default implementation it is recommended to use
     47      * getInstance() method.
     48      */
     49     public ASN1GeneralizedTime() {
     50         super(TAG_GENERALIZEDTIME);
     51     }
     52 
     53     /**
     54      * Returns ASN.1 GeneralizedTime type default implementation
     55      *
     56      * The default implementation works with encoding
     57      * that is represented as Date object.
     58      *
     59      * @return ASN.1 GeneralizedTime type default implementation
     60      */
     61     public static ASN1GeneralizedTime getInstance() {
     62         return ASN1;
     63     }
     64 
     65     //
     66     //
     67     // Decode
     68     //
     69     //
     70 
     71     public Object decode(BerInputStream in) throws IOException {
     72         in.readGeneralizedTime();
     73 
     74         if (in.isVerify) {
     75             return null;
     76         }
     77         return getDecodedObject(in);
     78     }
     79 
     80     //
     81     //
     82     // Encode
     83     //
     84     //
     85 
     86     public void encodeContent(BerOutputStream out) {
     87         out.encodeGeneralizedTime();
     88     }
     89 
     90     // FIXME support only one format for encoding, do we need others?
     91     //
     92     // According to X.680:
     93     // four digit year, seconds always presented
     94     // and fractional-seconds elements without
     95     // trailing 0's (must be cut later from content)
     96     private final static String GEN_PATTERN = "yyyyMMddHHmmss.SSS";
     97 
     98     public void setEncodingContent(BerOutputStream out) {
     99 
    100         SimpleDateFormat sdf = new SimpleDateFormat(GEN_PATTERN);
    101         sdf.setTimeZone(TimeZone.getTimeZone("UTC"));
    102         String temp = sdf.format(out.content);
    103         // cut off trailing 0s
    104         int nullId;
    105         int currLength;
    106         while (((nullId = temp.lastIndexOf('0', currLength = temp.length() - 1)) != -1)
    107                 & (nullId == currLength)) {
    108             temp = temp.substring(0, nullId);
    109         }
    110         // deal with point (cut off if it is last char)
    111         if (temp.charAt(currLength) == '.') {
    112             temp = temp.substring(0, currLength);
    113         }
    114 
    115         out.content = (temp + "Z").getBytes(Charsets.UTF_8);
    116         out.length = ((byte[]) out.content).length;
    117     }
    118 }
    119