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.util.Arrays; 27 28 29 /** 30 * This class represents ASN.1 octet string type. 31 * 32 * @see <a href="http://asn1.elibel.tm.fr/en/standards/index.htm">ASN.1</a> 33 */ 34 public class ASN1OctetString extends ASN1StringType { 35 36 /** default implementation */ 37 private static final ASN1OctetString ASN1 = new ASN1OctetString(); 38 39 /** 40 * Constructs ASN.1 octet string type 41 * 42 * The constructor is provided for inheritance purposes 43 * when there is a need to create a custom ASN.1 octet string type. 44 * To get a default implementation it is recommended to use 45 * getInstance() method. 46 */ 47 public ASN1OctetString() { 48 super(TAG_OCTETSTRING); 49 } 50 51 /** 52 * Returns ASN.1 octet string type default implementation 53 * 54 * The default implementation works with encoding 55 * that is represented as byte array. 56 */ 57 public static ASN1OctetString getInstance() { 58 return ASN1; 59 } 60 61 @Override public Object decode(BerInputStream in) throws IOException { 62 in.readOctetString(); 63 64 if (in.isVerify) { 65 return null; 66 } 67 return getDecodedObject(in); 68 } 69 70 /** 71 * Extracts array of bytes from BER input stream. 72 * 73 * @return array of bytes 74 */ 75 @Override public Object getDecodedObject(BerInputStream in) throws IOException { 76 return Arrays.copyOfRange(in.buffer, in.contentOffset, in.contentOffset + in.length); 77 } 78 79 @Override public void encodeContent(BerOutputStream out) { 80 out.encodeOctetString(); 81 } 82 83 @Override public void setEncodingContent(BerOutputStream out) { 84 out.length = ((byte[]) out.content).length; 85 } 86 } 87