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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 package org.apache.harmony.security.x509;
     19 
     20 import java.io.IOException;
     21 import javax.security.auth.x500.X500Principal;
     22 import org.apache.harmony.security.asn1.ASN1Sequence;
     23 import org.apache.harmony.security.asn1.ASN1Type;
     24 import org.apache.harmony.security.asn1.BerInputStream;
     25 import org.apache.harmony.security.x501.Name;
     26 
     27 /**
     28  * CRL Entry's Certificate Issuer Extension (OID = 2.5.29.29).
     29  * It is a CRL entry extension and contains the GeneralNames describing
     30  * the issuer of revoked certificate. Its ASN.1 notation is as follows:
     31  * <pre>
     32  *   id-ce-certificateIssuer   OBJECT IDENTIFIER ::= { id-ce 29 }
     33  *
     34  *   certificateIssuer ::=     GeneralNames
     35  * </pre>
     36  * (as specified in RFC 3280)
     37  * In java implementation it is presumed that GeneralNames consist of
     38  * one element and its type is directoryName.
     39  */
     40 public class CertificateIssuer extends ExtensionValue {
     41 
     42     // certificate issuer value
     43     private X500Principal issuer;
     44 
     45     /**
     46      * Creates an object on the base of GeneralName structure.
     47      */
     48     public CertificateIssuer(GeneralName issuer) {
     49         super(ASN1.encode(issuer));
     50     }
     51 
     52     /**
     53      * Creates an object on the base of its encoded form.
     54      */
     55     public CertificateIssuer(byte[] encoding) {
     56         super(encoding);
     57     }
     58 
     59     /**
     60      * Returns the issuer.
     61      */
     62     public X500Principal getIssuer() throws IOException {
     63         if (issuer == null) {
     64             issuer = (X500Principal) ASN1.decode(getEncoded());
     65         }
     66         return issuer;
     67     }
     68 
     69     /**
     70      * Places the string representation of extension value
     71      * into the StringBuffer object.
     72      */
     73     public void dumpValue(StringBuffer buffer, String prefix) {
     74         buffer.append(prefix).append("Certificate Issuer: ");
     75         if (issuer == null) {
     76             try {
     77                 issuer = getIssuer();
     78             } catch (IOException e) {
     79                 // incorrect extension value encoding
     80                 buffer.append("Unparseable (incorrect!) extension value:\n");
     81                 super.dumpValue(buffer);
     82             }
     83         }
     84         buffer.append(issuer).append('\n');
     85     }
     86 
     87     /**
     88      * ASN.1 Encoder/Decoder.
     89      */
     90     public static final ASN1Type ASN1 = new ASN1Sequence(new ASN1Type[] {
     91         GeneralName.ASN1
     92     }) {
     93         public Object getDecodedObject(BerInputStream in) {
     94             return ((Name) ((GeneralName) ((Object[]) in.content)[0])
     95                     .getName()).getX500Principal();
     96         }
     97 
     98         protected void getValues(Object object, Object[] values) {
     99             values[0] = object;
    100         }
    101     };
    102 }
    103