/*
* 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.karaf.shell.ssh;
import org.apache.commons.ssl.PEMUtil;
import org.apache.commons.ssl.PKCS8Key;
import org.apache.sshd.server.keyprovider.AbstractGeneratorHostKeyProvider;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.file.Paths;
import java.security.GeneralSecurityException;
import java.security.KeyPair;
import java.util.ArrayList;
import java.util.Collection;
/**
* Read SSH keys without resorting to BouncyCastle
*/
public class OpenSSHGeneratorFileKeyProvider extends AbstractGeneratorHostKeyProvider {
private String password;
public OpenSSHGeneratorFileKeyProvider() {
}
public OpenSSHGeneratorFileKeyProvider(String path) {
setPath(Paths.get(path));
}
public OpenSSHGeneratorFileKeyProvider(String path, String algorithm) {
this(path);
setAlgorithm(algorithm);
}
public OpenSSHGeneratorFileKeyProvider(String path, String algorithm, int keySize) {
this(path, algorithm);
setKeySize(keySize);
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
@Override
protected KeyPair doReadKeyPair(String resourceKey, InputStream is) throws IOException, GeneralSecurityException {
PKCS8Key pkcs8 = new PKCS8Key(is, password == null ? null : password.toCharArray());
return new KeyPair(pkcs8.getPublicKey(), pkcs8.getPrivateKey());
}
@Override
protected void doWriteKeyPair(String resourceKey, KeyPair kp, OutputStream os) throws IOException, GeneralSecurityException {
Collection<Object> items = new ArrayList<>();
items.add(kp.getPrivate());
items.add(kp.getPublic());
byte[] bytes = PEMUtil.encode(items);
os.write(bytes);
}
}