/*
 * Copyright 1999-2005 The Apache Software Foundation.
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 */
package org.jcp.xml.dsig.internal;

import java.io.ByteArrayOutputStream;
import javax.crypto.Mac;

/**
 * Derived from Apache sources and changed to use Mac objects instead of 
 * org.apache.xml.security.algorithms.SignatureAlgorithm objects.
 *
 * @author raul
 * @author Sean Mullan
 *
 */
public class MacOutputStream extends ByteArrayOutputStream {
    private final Mac mac;

    public MacOutputStream(Mac mac) {
        this.mac = mac;
    }

    /** @inheritDoc */
    public void write(byte[] arg0)  {
	super.write(arg0, 0, arg0.length);
        mac.update(arg0);
    }
    
    /** @inheritDoc */
    public void write(int arg0) {
	super.write(arg0);
        mac.update((byte) arg0);
    }
    
    /** @inheritDoc */
    public void write(byte[] arg0, int arg1, int arg2) {
	super.write(arg0, arg1, arg2);
        mac.update(arg0, arg1, arg2);
    }
}
