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	/*
	* Copyright (c) 1997, 2002, 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.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
	*/
	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;
	}
	}

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