/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.sshd.common.config.keys.loader.putty;
import java.io.Closeable;
import java.io.DataInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.math.BigInteger;
/**
* Helper class for {@code Putty} key files decoders
* @author <a href="mailto:dev@mina.apache.org">Apache MINA SSHD Project</a>
*/
public class PuttyKeyReader implements Closeable {
private final DataInputStream di;
public PuttyKeyReader(InputStream s) {
di = new DataInputStream(s);
}
public void skip() throws IOException {
di.skipBytes(di.readInt());
}
private byte[] read() throws IOException {
int len = di.readInt();
byte[] r = new byte[len];
di.readFully(r);
return r;
}
public BigInteger readInt() throws IOException {
return new BigInteger(read());
}
@Override
public void close() throws IOException {
di.close();
}
}