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The Bouncy Castle Java CMS and S/MIME APIs for handling the CMS and S/MIME protocols. This jar contains CMS and S/MIME APIs for JDK 1.6. The APIs can be used in conjunction with a JCE/JCA provider such as the one provided with the Bouncy Castle Cryptography APIs. If the S/MIME API is used, the JavaMail API and the Java activation framework will also be needed.

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package org.bouncycastle.cms;

import java.io.IOException;
import java.io.OutputStream;
import java.security.MessageDigest;

class DigOutputStream extends OutputStream
{
    private final MessageDigest dig;

    DigOutputStream(MessageDigest dig)
    {
        this.dig = dig;
    }

    public void write(byte[] b, int off, int len) throws IOException
    {
        dig.update(b, off, len);
    }

    public void write(int b) throws IOException
    {
        dig.update((byte) b);
    }
}