/****************************************************************************
* 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.ifd.scio.reader;
import java.io.ByteArrayOutputStream;
import org.openecard.common.util.ShortUtils;
/**
*
* @author Tobias Wich <tobias.wich@ecsec.de>
*/
public class ExecutePACERequest {
public enum Function {
GetReaderPACECapabilities((byte) 1),
EstablishPACEChannel((byte) 2),
DestroyPACEChannel((byte) 3);
private byte code;
private Function(byte code) {
this.code = code;
}
private byte getCode() {
return code;
}
}
public ExecutePACERequest(Function f) {
this.function = f;
}
public ExecutePACERequest(Function f, byte[] data) {
this.function = f;
this.dataLength = (short) data.length;
this.data = data;
}
private Function function;
private short dataLength = 0;
private byte[] data;
public byte[] toBytes() {
ByteArrayOutputStream o = new ByteArrayOutputStream();
o.write(function.getCode());
// write data length
byte[] dataLength_bytes = ShortUtils.toByteArray(dataLength);
for (int i = dataLength_bytes.length - 1; i >= 0; i--) {
o.write(dataLength_bytes[i]);
}
// write missing bytes to length field
for (int i = dataLength_bytes.length; i < 2; i++) {
o.write(0);
}
// write data if there is a positive length
if (dataLength > 0) {
o.write(data, 0, data.length);
}
return o.toByteArray();
}
}