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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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,
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 *
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package sun.security.x509;

import java.security.PublicKey;
import java.io.InputStream;
import java.io.IOException;

import sun.security.util.*;

/**
 * This class defines the X509Key attribute for the Certificate.
 *
 * @author Amit Kapoor
 * @author Hemma Prafullchandra
 * @see DerEncoder
 */
public class CertificateX509Key implements DerEncoder {

    public static final String NAME = "key";

    // Private data member
    private PublicKey key;

    /**
     * Default constructor for the certificate attribute.
     *
     * @param key the X509Key
     */
    public CertificateX509Key(PublicKey key) {
        this.key = key;
    }

    /**
     * Create the object, decoding the values from the passed DER stream.
     *
     * @param in the DerInputStream to read the X509Key from.
     * @exception IOException on decoding errors.
     */
    public CertificateX509Key(DerInputStream in) throws IOException {
        DerValue val = in.getDerValue();
        key = X509Key.parse(val);
    }

    /**
     * Create the object, decoding the values from the passed stream.
     *
     * @param in the InputStream to read the X509Key from.
     * @exception IOException on decoding errors.
     */
    public CertificateX509Key(InputStream in) throws IOException {
        DerValue val = new DerValue(in);
        key = X509Key.parse(val);
    }

    /**
     * Return the key as printable string.
     */
    public String toString() {
        if (key == null) return "";
        return key.toString();
    }

    /**
     * Encode the key in DER form to the stream.
     *
     * @param out the DerOutputStream to marshal the contents to.
     */
    @Override
    public void encode(DerOutputStream out) {
        out.writeBytes(key.getEncoded());
    }

   /**
     * Get the PublicKey value.
     */
    public PublicKey getKey() {
        return key;
    }

}