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Java example source code file (PKCS10Attributes.java)

This example Java source code file (PKCS10Attributes.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

collection, derencoder, deroutputstream, dervalue, enumeration, hashtable, illegal, ioexception, object, pkcs10attribute, pkcs10attributes, string, util

The PKCS10Attributes.java Java example source code

/*
 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package sun.security.pkcs10;

import java.io.IOException;
import java.io.OutputStream;
import java.security.cert.CertificateException;
import java.util.Collection;
import java.util.Collections;
import java.util.Enumeration;
import java.util.Hashtable;

import sun.security.util.*;

/**
 * This class defines the PKCS10 attributes for the request.
 * The ASN.1 syntax for this is:
 * <pre>
 * Attributes ::= SET OF Attribute
 * </pre>
 *
 * @author Amit Kapoor
 * @author Hemma Prafullchandra
 * @see PKCS10
 * @see PKCS10Attribute
 */
public class PKCS10Attributes implements DerEncoder {

    private Hashtable<String, PKCS10Attribute> map =
                        new Hashtable<String, PKCS10Attribute>(3);

    /**
     * Default constructor for the PKCS10 attribute.
     */
    public PKCS10Attributes() { }

    /**
     * Create the object from the array of PKCS10Attribute objects.
     *
     * @param attrs the array of PKCS10Attribute objects.
     */
    public PKCS10Attributes(PKCS10Attribute[] attrs) {
        for (int i = 0; i < attrs.length; i++) {
            map.put(attrs[i].getAttributeId().toString(), attrs[i]);
        }
    }

    /**
     * Create the object, decoding the values from the passed DER stream.
     * The DER stream contains the SET OF Attribute.
     *
     * @param in the DerInputStream to read the attributes from.
     * @exception IOException on decoding errors.
     */
    public PKCS10Attributes(DerInputStream in) throws IOException {
        DerValue[] attrs = in.getSet(3, true);

        if (attrs == null)
            throw new IOException("Illegal encoding of attributes");
        for (int i = 0; i < attrs.length; i++) {
            PKCS10Attribute attr = new PKCS10Attribute(attrs[i]);
            map.put(attr.getAttributeId().toString(), attr);
        }
    }

    /**
     * Encode the attributes in DER form to the stream.
     *
     * @param out the OutputStream to marshal the contents to.
     * @exception IOException on encoding errors.
     */
    public void encode(OutputStream out) throws IOException {
        derEncode(out);
    }

    /**
     * Encode the attributes in DER form to the stream.
     * Implements the <code>DerEncoder interface.
     *
     * @param out the OutputStream to marshal the contents to.
     * @exception IOException on encoding errors.
     */
    public void derEncode(OutputStream out) throws IOException {
        // first copy the elements into an array
        Collection<PKCS10Attribute> allAttrs = map.values();
        PKCS10Attribute[] attribs =
                allAttrs.toArray(new PKCS10Attribute[map.size()]);

        DerOutputStream attrOut = new DerOutputStream();
        attrOut.putOrderedSetOf(DerValue.createTag(DerValue.TAG_CONTEXT,
                                                   true, (byte)0),
                                attribs);
        out.write(attrOut.toByteArray());
    }

    /**
     * Set the attribute value.
     */
    public void setAttribute(String name, Object obj) {
        if (obj instanceof PKCS10Attribute) {
            map.put(name, (PKCS10Attribute)obj);
        }
    }

    /**
     * Get the attribute value.
     */
    public Object getAttribute(String name) {
        return map.get(name);
    }

    /**
     * Delete the attribute value.
     */
    public void deleteAttribute(String name) {
        map.remove(name);
    }

    /**
     * Return an enumeration of names of attributes existing within this
     * attribute.
     */
    public Enumeration<PKCS10Attribute> getElements() {
        return (map.elements());
    }

    /**
     * Return a Collection of attributes existing within this
     * PKCS10Attributes object.
     */
    public Collection<PKCS10Attribute> getAttributes() {
        return (Collections.unmodifiableCollection(map.values()));
    }

    /**
     * Compares this PKCS10Attributes for equality with the specified
     * object. If the <code>other object is an
     * <code>instanceof PKCS10Attributes, then
     * all the entries are compared with the entries from this.
     *
     * @param other the object to test for equality with this PKCS10Attributes.
     * @return true if all the entries match that of the Other,
     * false otherwise.
     */
    public boolean equals(Object other) {
        if (this == other)
            return true;
        if (!(other instanceof PKCS10Attributes))
            return false;

        Collection<PKCS10Attribute> othersAttribs =
                ((PKCS10Attributes)other).getAttributes();
        PKCS10Attribute[] attrs =
            othersAttribs.toArray(new PKCS10Attribute[othersAttribs.size()]);
        int len = attrs.length;
        if (len != map.size())
            return false;
        PKCS10Attribute thisAttr, otherAttr;
        String key = null;
        for (int i=0; i < len; i++) {
            otherAttr = attrs[i];
            key = otherAttr.getAttributeId().toString();

            if (key == null)
                return false;
            thisAttr = map.get(key);
            if (thisAttr == null)
                return false;
            if (! thisAttr.equals(otherAttr))
                return false;
        }
        return true;
    }

    /**
     * Returns a hashcode value for this PKCS10Attributes.
     *
     * @return the hashcode value.
     */
    public int hashCode() {
        return map.hashCode();
    }

    /**
     * Returns a string representation of this <tt>PKCS10Attributes object
     * in the form of a set of entries, enclosed in braces and separated
     * by the ASCII characters "<tt>, " (comma and space).
     * <p>Overrides the toString method of Object.
     *
     * @return  a string representation of this PKCS10Attributes.
     */
    public String toString() {
        String s = map.size() + "\n" + map.toString();
        return s;
    }
}

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