package org.bouncycastle.crypto.io;import java.io.FilterOutputStream;import java.io.IOException;import java.io.OutputStream;import org.bouncycastle.crypto.Digest;public class DigestOutputStream    extends FilterOutputStream{    protected Digest digest;    public DigestOutputStream(        OutputStream    stream,        Digest          digest)    {        super(stream);        this.digest = digest;    }    public void write(int b)        throws IOException    {        digest.update((byte)b);        out.write(b);    }    public void write(        byte[] b,        int off,        int len)        throws IOException    {        digest.update(b, off, len);        out.write(b, off, len);    }    public Digest getDigest()    {        return digest;    }}