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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 Alexander Y. Kleymenov
     20 * @version $Revision$
     21 */
     22 
     23 package org.apache.harmony.security.x509;
     24 
     25 import java.io.IOException;
     26 import java.util.Collection;
     27 import java.util.List;
     28 import org.apache.harmony.security.asn1.ASN1SequenceOf;
     29 import org.apache.harmony.security.asn1.ASN1Type;
     30 import org.apache.harmony.security.asn1.BerInputStream;
     31 
     32 /**
     33  * The class encapsulates the ASN.1 DER encoding/decoding work
     34  * with the CRL Distribution Points which is the part of X.509 Certificate
     35  * (as specified in RFC 3280 -
     36  *  Internet X.509 Public Key Infrastructure.
     37  *  Certificate and Certificate Revocation List (CRL) Profile.
     38  *  http://www.ietf.org/rfc/rfc3280.txt):
     39  *
     40  * <pre>
     41  *  CRLDistributionPoints ::= SEQUENCE SIZE (1..MAX) OF DistributionPoint
     42  *
     43  *  DistributionPoint ::= SEQUENCE {
     44  *        distributionPoint       [0]     DistributionPointName OPTIONAL,
     45  *        reasons                 [1]     ReasonFlags OPTIONAL,
     46  *        cRLIssuer               [2]     GeneralNames OPTIONAL
     47  *  }
     48  *
     49  *  DistributionPointName ::= CHOICE {
     50  *        fullName                [0]     GeneralNames,
     51  *        nameRelativeToCRLIssuer [1]     RelativeDistinguishedName
     52  *  }
     53  *
     54  *  ReasonFlags ::= BIT STRING {
     55  *        unused                  (0),
     56  *        keyCompromise           (1),
     57  *        cACompromise            (2),
     58  *        affiliationChanged      (3),
     59  *        superseded              (4),
     60  *        cessationOfOperation    (5),
     61  *        certificateHold         (6),
     62  *        privilegeWithdrawn      (7),
     63  *        aACompromise            (8)
     64  *  }
     65  * </pre>
     66  */
     67 public final class CRLDistributionPoints extends ExtensionValue {
     68     private List<DistributionPoint> distributionPoints;
     69     private byte[] encoding;
     70 
     71     private CRLDistributionPoints(List<DistributionPoint> distributionPoints, byte[] encoding) {
     72         if ((distributionPoints == null) || (distributionPoints.size() == 0)) {
     73             throw new IllegalArgumentException("distributionPoints are empty");
     74         }
     75         this.distributionPoints = distributionPoints;
     76         this.encoding = encoding;
     77     }
     78 
     79     @Override public byte[] getEncoded() {
     80         if (encoding == null) {
     81             encoding = ASN1.encode(this);
     82         }
     83         return encoding;
     84     }
     85 
     86     public static CRLDistributionPoints decode(byte[] encoding) throws IOException {
     87         return (CRLDistributionPoints) ASN1.decode(encoding);
     88     }
     89 
     90     @Override public void dumpValue(StringBuilder sb, String prefix) {
     91         sb.append(prefix).append("CRL Distribution Points: [\n");
     92         int number = 0;
     93         for (DistributionPoint distributionPoint : distributionPoints) {
     94             sb.append(prefix).append("  [").append(++number).append("]\n");
     95             distributionPoint.dumpValue(sb, prefix + "  ");
     96         }
     97         sb.append(prefix).append("]\n");
     98     }
     99 
    100     /**
    101      * Custom X.509 decoder.
    102      */
    103     public static final ASN1Type ASN1 = new ASN1SequenceOf(DistributionPoint.ASN1) {
    104         @Override public Object getDecodedObject(BerInputStream in) {
    105             return new CRLDistributionPoints((List<DistributionPoint>) in.content, in.getEncoded());
    106         }
    107 
    108         @Override public Collection<?> getValues(Object object) {
    109             CRLDistributionPoints dps = (CRLDistributionPoints) object;
    110             return dps.distributionPoints;
    111         }
    112     };
    113 }
    114