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      1 /*
      2  * Copyright (c) 1997, 2006, Oracle and/or its affiliates. All rights reserved.
      3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
      4  *
      5  * This code is free software; you can redistribute it and/or modify it
      6  * under the terms of the GNU General Public License version 2 only, as
      7  * published by the Free Software Foundation.  Oracle designates this
      8  * particular file as subject to the "Classpath" exception as provided
      9  * by Oracle in the LICENSE file that accompanied this code.
     10  *
     11  * This code is distributed in the hope that it will be useful, but WITHOUT
     12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
     13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
     14  * version 2 for more details (a copy is included in the LICENSE file that
     15  * accompanied this code).
     16  *
     17  * You should have received a copy of the GNU General Public License version
     18  * 2 along with this work; if not, write to the Free Software Foundation,
     19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
     20  *
     21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
     22  * or visit www.oracle.com if you need additional information or have any
     23  * questions.
     24  */
     25 
     26 package sun.security.x509;
     27 
     28 import java.security.PublicKey;
     29 import java.io.InputStream;
     30 import java.io.IOException;
     31 import java.io.OutputStream;
     32 import java.util.Enumeration;
     33 
     34 import sun.security.util.*;
     35 
     36 /**
     37  * This class defines the X509Key attribute for the Certificate.
     38  *
     39  * @author Amit Kapoor
     40  * @author Hemma Prafullchandra
     41  * @see CertAttrSet
     42  */
     43 public class CertificateX509Key implements CertAttrSet<String> {
     44     /**
     45      * Identifier for this attribute, to be used with the
     46      * get, set, delete methods of Certificate, x509 type.
     47      */
     48     public static final String IDENT = "x509.info.key";
     49     /**
     50      * Sub attributes name for this CertAttrSet.
     51      */
     52     public static final String NAME = "key";
     53     public static final String KEY = "value";
     54 
     55     // Private data member
     56     private PublicKey key;
     57 
     58     /**
     59      * Default constructor for the certificate attribute.
     60      *
     61      * @param key the X509Key
     62      */
     63     public CertificateX509Key(PublicKey key) {
     64         this.key = key;
     65     }
     66 
     67     /**
     68      * Create the object, decoding the values from the passed DER stream.
     69      *
     70      * @param in the DerInputStream to read the X509Key from.
     71      * @exception IOException on decoding errors.
     72      */
     73     public CertificateX509Key(DerInputStream in) throws IOException {
     74         DerValue val = in.getDerValue();
     75         key = X509Key.parse(val);
     76     }
     77 
     78     /**
     79      * Create the object, decoding the values from the passed stream.
     80      *
     81      * @param in the InputStream to read the X509Key from.
     82      * @exception IOException on decoding errors.
     83      */
     84     public CertificateX509Key(InputStream in) throws IOException {
     85         DerValue val = new DerValue(in);
     86         key = X509Key.parse(val);
     87     }
     88 
     89     /**
     90      * Return the key as printable string.
     91      */
     92     public String toString() {
     93         if (key == null) return "";
     94         return(key.toString());
     95     }
     96 
     97     /**
     98      * Encode the key in DER form to the stream.
     99      *
    100      * @param out the OutputStream to marshal the contents to.
    101      * @exception IOException on errors.
    102      */
    103     public void encode(OutputStream out) throws IOException {
    104         DerOutputStream tmp = new DerOutputStream();
    105         tmp.write(key.getEncoded());
    106 
    107         out.write(tmp.toByteArray());
    108     }
    109 
    110     /**
    111      * Set the attribute value.
    112      */
    113     public void set(String name, Object obj) throws IOException {
    114         if (name.equalsIgnoreCase(KEY)) {
    115             this.key = (PublicKey)obj;
    116         } else {
    117             throw new IOException("Attribute name not recognized by " +
    118                                   "CertAttrSet: CertificateX509Key.");
    119         }
    120     }
    121 
    122     /**
    123      * Get the attribute value.
    124      */
    125     public Object get(String name) throws IOException {
    126         if (name.equalsIgnoreCase(KEY)) {
    127             return(key);
    128         } else {
    129             throw new IOException("Attribute name not recognized by " +
    130                                   "CertAttrSet: CertificateX509Key.");
    131         }
    132     }
    133 
    134     /**
    135      * Delete the attribute value.
    136      */
    137     public void delete(String name) throws IOException {
    138       if (name.equalsIgnoreCase(KEY)) {
    139         key = null;
    140       } else {
    141             throw new IOException("Attribute name not recognized by " +
    142                                   "CertAttrSet: CertificateX509Key.");
    143       }
    144     }
    145 
    146     /**
    147      * Return an enumeration of names of attributes existing within this
    148      * attribute.
    149      */
    150     public Enumeration<String> getElements() {
    151         AttributeNameEnumeration elements = new AttributeNameEnumeration();
    152         elements.addElement(KEY);
    153 
    154         return(elements.elements());
    155     }
    156 
    157     /**
    158      * Return the name of this attribute.
    159      */
    160     public String getName() {
    161         return(NAME);
    162     }
    163 }
    164