/****************************************************************************
* Copyright (C) 2012 ecsec GmbH.
* All rights reserved.
* Contact: ecsec GmbH (info@ecsec.de)
*
* This file is part of the Open eCard App.
*
* GNU General Public License Usage
* This file may be used under the terms of the GNU General Public
* License version 3.0 as published by the Free Software Foundation
* and appearing in the file LICENSE.GPL included in the packaging of
* this file. Please review the following information to ensure the
* GNU General Public License version 3.0 requirements will be met:
* http://www.gnu.org/copyleft/gpl.html.
*
* Other Usage
* Alternatively, this file may be used in accordance with the terms
* and conditions contained in a signed written agreement between
* you and ecsec GmbH.
*
***************************************************************************/
package org.openecard.common.apdu.common;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import org.openecard.common.util.IntegerUtils;
/**
*
* @author Moritz Horsch <horsch@cdc.informatik.tu-darmstadt.de>
*/
public final class CardAPDUOutputStream extends ByteArrayOutputStream {
/**
* Creates a new byte array stream for APDUs.
*/
public CardAPDUOutputStream() {
super();
}
/**
* Creates a new byte array stream for APDUs, with a buffer capacity of the specified size.
*
* @param size Initial size.
*/
public CardAPDUOutputStream(int size) {
super(size);
}
/**
* Writes TLV encoded data to the stream.
*
* @param type Type
* @param value Value
* @throws IOException if an I/O error occurs
*/
public void writeTLV(byte type, byte value) throws IOException {
write(type);
write((byte) 0x01);
write(value);
}
/**
* Writes TLV encoded data to the stream.
*
* @param type Type
* @param value Value
* @throws IOException if an I/O error occurs
*/
public void writeTLV(byte type, byte[] value) throws IOException {
final int length = value.length;
write(type);
if (length > 0x7F && length <= 0xFF) {
write((byte) 0x81);
} else if (length == 0xFF) {
write((byte) 0x00);
} else if (length > 0xFF) {
write((byte) 0x82);
}
write(IntegerUtils.toByteArray(length));
write(value);
}
}