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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 
     27 
     28 /**
     29  * This class represents ASN.1 ANY type.
     30  *
     31  * @see <a href="http://asn1.elibel.tm.fr/en/standards/index.htm">ASN.1</a>
     32  */
     33 public final class ASN1Any extends ASN1Type {
     34 
     35     /** default implementation */
     36     private static final ASN1Any ASN1= new ASN1Any();
     37 
     38     /**
     39      * Constructs ASN.1 ANY type
     40      *
     41      * The constructor is provided for inheritance purposes
     42      * when there is a need to create a custom ASN.1 ANY type.
     43      * To get a default implementation it is recommended to use
     44      * getInstance() method.
     45      */
     46     public ASN1Any() {
     47         super(TAG_ANY); // has not tag number
     48     }
     49 
     50     /**
     51      * Returns ASN.1 ANY type default implementation
     52      *
     53      * The default implementation works with full encoding
     54      * that is represented as raw byte array.
     55      *
     56      * @return ASN.1 ANY type default implementation
     57      */
     58     public static ASN1Any getInstance() {
     59         return ASN1;
     60     }
     61 
     62     /**
     63      * Tests provided identifier.
     64      *
     65      * @param identifier - identifier to be verified
     66      * @return - true
     67      */
     68     public final boolean checkTag(int identifier) {
     69         return true; //all tags are OK
     70     }
     71 
     72     public Object decode(BerInputStream in) throws IOException {
     73         // only read content, doesn't check it
     74         in.readContent();
     75 
     76         if (in.isVerify) {
     77             return null;
     78         }
     79         return getDecodedObject(in);
     80     }
     81 
     82     /**
     83      * Extracts array of bytes that represents full encoding from BER input
     84      * stream.
     85      *
     86      * @param in BER input stream
     87      * @return array of bytes
     88      */
     89     public Object getDecodedObject(BerInputStream in) throws IOException {
     90         byte[] bytesEncoded = new byte[in.offset - in.tagOffset];
     91         System.arraycopy(in.buffer, in.tagOffset, bytesEncoded, 0,
     92                 bytesEncoded.length);
     93         return bytesEncoded;
     94     }
     95 
     96     public void encodeASN(BerOutputStream out) {
     97         out.encodeANY();
     98     }
     99 
    100     public void encodeContent(BerOutputStream out) {
    101         out.encodeANY();
    102     }
    103 
    104     public void setEncodingContent(BerOutputStream out) {
    105         out.length = ((byte[]) out.content).length;
    106     }
    107 
    108     public int getEncodedLength(BerOutputStream out) {
    109         return out.length;
    110     }
    111 }
    112