serialnumber.java

来自「This is a resource based on j2me embedde」· Java 代码 · 共 127 行

/*
 * @(#)SerialNumber.java	1.16 06/10/10
 *
 * Copyright  1990-2008 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 sun.security.x509;

import java.io.IOException;
import java.io.InputStream;
import java.math.BigInteger;

import sun.security.util.*;

/**
 * This class defines the SerialNumber class used by certificates.
 *
 * @author Amit Kapoor
 * @author Hemma Prafullchandra
 * @version 1.9
 */
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 BigInteger.
     *
     * @param num the BigInteger number used to create the serial number.
     */
    public SerialNumber(BigInteger num) {
        serialNum = num;
    }

    /**
     * The default constructor for this class using int.
     *
     * @param num the BigInteger number used to create the serial number.
     */
    public SerialNumber(int num) {
        serialNum = BigInteger.valueOf(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: [" + Debug.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.
     */
    public BigInteger getNumber() {
        return serialNum;
    }
}