com.sshtools.util.SimpleASNWriter Maven / Gradle / Ivy
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/**
* Copyright 2003-2016 SSHTOOLS Limited. All Rights Reserved.
*
* For product documentation visit https://www.sshtools.com/
*
* This file is part of J2SSH Maverick.
*
* J2SSH Maverick is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* J2SSH Maverick is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with J2SSH Maverick. If not, see .
*/
package com.sshtools.util;
import java.io.ByteArrayOutputStream;
/**
*
*
* @author $author$
*/
public class SimpleASNWriter {
private ByteArrayOutputStream data;
/**
* Creates a new SimpleASNWriter object.
*/
public SimpleASNWriter() {
this.data = new ByteArrayOutputStream();
}
/**
*
*
* @param b
*/
public void writeByte(int b) {
data.write(b);
}
/**
*
*
* @param b
*/
public void writeData(byte[] b) {
writeLength(b.length);
this.data.write(b, 0, b.length);
}
/**
*
*
* @param length
*/
public void writeLength(int length) {
if (length < 0x80) {
data.write(length);
} else {
if (length < 0x100) {
data.write(0x81);
data.write(length);
} else if (length < 0x10000) {
data.write(0x82);
data.write(length >>> 8);
data.write(length);
} else if (length < 0x1000000) {
data.write(0x83);
data.write(length >>> 16);
data.write(length >>> 8);
data.write(length);
} else {
data.write(0x84);
data.write(length >>> 24);
data.write(length >>> 16);
data.write(length >>> 8);
data.write(length);
}
}
}
/**
*
*
* @return
*/
public byte[] toByteArray() {
return data.toByteArray();
}
}