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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 final class CRLNumber extends ExtensionValue {
     37     /** crl number value */
     38     private final BigInteger number;
     39 
     40     /**
     41      * Constructs the object on the base of its encoded form.
     42      */
     43     public CRLNumber(byte[] encoding) throws IOException {
     44         super(encoding);
     45         number = new BigInteger((byte[]) ASN1.decode(encoding));
     46     }
     47 
     48     /**
     49      * Returns the invalidity date.
     50      */
     51     public BigInteger getNumber() {
     52         return number;
     53     }
     54 
     55     /**
     56      * Returns ASN.1 encoded form of this X.509 CRLNumber value.
     57      */
     58     @Override public byte[] getEncoded() {
     59         if (encoding == null) {
     60             encoding = ASN1.encode(number.toByteArray());
     61         }
     62         return encoding;
     63     }
     64 
     65     @Override public void dumpValue(StringBuilder sb, String prefix) {
     66         sb.append(prefix).append("CRL Number: [ ").append(number).append(" ]\n");
     67     }
     68 
     69     /**
     70      * ASN.1 Encoder/Decoder.
     71      */
     72     public static final ASN1Type ASN1 = ASN1Integer.getInstance();
     73 }
     74