macdata.java

来自「《移动Agent技术》一书的所有章节源代码。」· Java 代码 · 共 70 行

package org.bouncycastle.asn1.pkcs;

import java.math.BigInteger;

import org.bouncycastle.asn1.*;
import org.bouncycastle.asn1.x509.*;

public class MacData
    implements DEREncodable
{
	DERConstructedSequence		seq;
	DigestInfo					digInfo;
    byte[]                      salt;
    BigInteger                  iterationCount;

	public MacData(
		DERConstructedSequence	seq)
	{
		this.seq = seq;

		this.digInfo = new DigestInfo((DERConstructedSequence)seq.getObjectAt(0));
		this.salt = ((DEROctetString)seq.getObjectAt(1)).getOctets();

        if (seq.getSize() == 3)
        {
            this.iterationCount = ((DERInteger)seq.getObjectAt(2)).getValue();
        }
        else
        {
            this.iterationCount = BigInteger.valueOf(1);
        }
	}

    public MacData(
        DigestInfo  digInfo,
        byte[]      salt,
        int         iterationCount)
    {
        this.digInfo = digInfo;
        this.salt = salt;
        this.iterationCount = BigInteger.valueOf(iterationCount);
    }

	public DigestInfo getMac()
	{
		return digInfo;
	}

    public byte[] getSalt()
    {
        return salt;
    }

    public BigInteger getIterationCount()
    {
        return iterationCount;
    }

    public DERObject getDERObject()
    {
        DERConstructedSequence  seq = new DERConstructedSequence();

        seq.addObject(digInfo);
        seq.addObject(new DEROctetString(salt));
        seq.addObject(new DERInteger(iterationCount));

        return seq;
    }
}