serialnumber.java

来自「This is a resource based on j2me embedde」· Java 代码 · 共 113 行

/*
 *
 *
 * Copyright  1990-2007 Sun Microsystems, Inc. All Rights Reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
 *
 * This program 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.
 *
 * This program 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 at /legal/license.txt).
 *
 * 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 Sun Microsystems, Inc., 4150 Network Circle, Santa
 * Clara, CA 95054 or visit www.sun.com if you need additional
 * information or have any questions.
 */

package com.sun.midp.pki;

import java.io.IOException;
import java.io.InputStream;

/**
 * This class defines the SerialNumber class used by certificates.
 */
public class SerialNumber {
    private BigInteger serialNum;

    // Construct the class from the DerValue
    private void construct(DerValue derVal) throws IOException {
        serialNum = derVal.getBigInteger();
        if (derVal.data.available() != 0) {
            throw new IOException("Excess SerialNumber data");
        }
    }

    /**
     * The default constructor for this class using int.
     *
     * @param num the BigInteger number used to create the serial number.
     */
    public SerialNumber(BigInteger num) {
        serialNum = num;
    }

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

    /**
     * Create the object, decoding the values from the passed DerValue.
     *
     * @param val the DerValue to read the SerialNumber from.
     * @exception IOException on decoding errors.
     */
    public SerialNumber(DerValue val) throws IOException {
        construct(val);
    }

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

    /**
     * Return the SerialNumber as user readable string.
     */
    public String toString() {
        return ("SerialNumber: [" + BigInteger.toHexString(serialNum) + "]");
    }

    /**
     * Encode the SerialNumber in DER form to the stream.
     *
     * @param out the DerOutputStream to marshal the contents to.
     * @exception IOException on errors.
     */
    public void encode(DerOutputStream out) throws IOException {
        out.putInteger(serialNum);
    }

    /**
     * Return the serial number.
     *
     * @return serial number
     */
    public BigInteger getNumber() {
        return serialNum;
    }
}