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      1 /*
      2  * Licensed to the Apache Software Foundation (ASF) under one
      3  * or more contributor license agreements.  See the NOTICE file
      4  * distributed with this work for additional information
      5  * regarding copyright ownership.  The ASF licenses this file
      6  * to you under the Apache License, Version 2.0 (the
      7  * "License"); you may not use this file except in compliance
      8  * with the License.  You may obtain a copy of the License at
      9  *
     10  *   http://www.apache.org/licenses/LICENSE-2.0
     11  *
     12  * Unless required by applicable law or agreed to in writing,
     13  * software distributed under the License is distributed on an
     14  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
     15  * KIND, either express or implied.  See the License for the
     16  * specific language governing permissions and limitations
     17  * under the License.
     18  */
     19 
     20 package org.apache.harmony.security.x509;
     21 
     22 import java.io.IOException;
     23 import java.math.BigInteger;
     24 import org.apache.harmony.security.asn1.ASN1Integer;
     25 import org.apache.harmony.security.asn1.ASN1Type;
     26 
     27 /**
     28  * CRL Entry's CRL Number Extension (OID = 2.5.29.20).
     29  * <pre>
     30  *   id-ce-cRLNumber OBJECT IDENTIFIER ::= { id-ce 20 }
     31  *
     32  *   CRLNumber ::= INTEGER (0..MAX)
     33  * </pre>
     34  * (as specified in RFC 3280 http://www.ietf.org/rfc/rfc3280.txt)
     35  */
     36 public class CRLNumber extends ExtensionValue {
     37 
     38     // crl number value
     39     private final BigInteger number;
     40 
     41     /**
     42      * Constructs the object on the base of the invalidity date value.
     43      */
     44     public CRLNumber(BigInteger number) {
     45         this.number = number;
     46     }
     47 
     48     /**
     49      * Constructs the object on the base of its encoded form.
     50      */
     51     public CRLNumber(byte[] encoding) throws IOException {
     52         super(encoding);
     53         number = new BigInteger((byte[]) ASN1.decode(encoding));
     54     }
     55 
     56     /**
     57      * Returns the invalidity date.
     58      */
     59     public BigInteger getNumber() {
     60         return number;
     61     }
     62 
     63     /**
     64      * Returns ASN.1 encoded form of this X.509 CRLNumber value.
     65      * @return a byte array containing ASN.1 encoded form.
     66      */
     67     public byte[] getEncoded() {
     68         if (encoding == null) {
     69             encoding = ASN1.encode(number.toByteArray());
     70         }
     71         return encoding;
     72     }
     73 
     74     /**
     75      * Places the string representation of extension value
     76      * into the StringBuffer object.
     77      */
     78     public void dumpValue(StringBuffer buffer, String prefix) {
     79         buffer.append(prefix).append("CRL Number: [ ").append(number).append(
     80                 " ]\n");
     81     }
     82 
     83     /**
     84      * ASN.1 Encoder/Decoder.
     85      */
     86     public static final ASN1Type ASN1 = ASN1Integer.getInstance();
     87 }
     88