/**
* 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.camel.component.ssh;
import java.io.FileInputStream;
import java.io.InputStreamReader;
import java.security.KeyPair;
import java.util.ArrayList;
import java.util.List;
import org.apache.sshd.common.keyprovider.AbstractKeyPairProvider;
import org.apache.sshd.common.util.SecurityUtils;
import org.bouncycastle.openssl.PEMDecryptorProvider;
import org.bouncycastle.openssl.PEMEncryptedKeyPair;
import org.bouncycastle.openssl.PEMKeyPair;
import org.bouncycastle.openssl.PEMParser;
import org.bouncycastle.openssl.PasswordFinder;
import org.bouncycastle.openssl.jcajce.JcaPEMKeyConverter;
import org.bouncycastle.openssl.jcajce.JcePEMDecryptorProviderBuilder;
/**
* This host key provider loads private keys from the specified files.
*
* Note that this class has a direct dependency on BouncyCastle and won't work
* unless it has been correctly registered as a security provider.
*
* @author <a href="mailto:dev@mina.apache.org">Apache MINA SSHD Project</a>
*/
public class FileKeyPairProvider extends AbstractKeyPairProvider {
private String[] files;
private PasswordFinder passwordFinder;
public FileKeyPairProvider() {
}
public FileKeyPairProvider(String[] files) {
this.files = files;
}
public FileKeyPairProvider(String[] files, PasswordFinder passwordFinder) {
this.files = files;
this.passwordFinder = passwordFinder;
}
public String[] getFiles() {
return files;
}
public void setFiles(String[] files) {
this.files = files;
}
public PasswordFinder getPasswordFinder() {
return passwordFinder;
}
public void setPasswordFinder(PasswordFinder passwordFinder) {
this.passwordFinder = passwordFinder;
}
@Override
public Iterable<KeyPair> loadKeys() {
if (!SecurityUtils.isBouncyCastleRegistered()) {
throw new IllegalStateException("BouncyCastle must be registered as a JCE provider");
}
List<KeyPair> keys = new ArrayList<KeyPair>();
for (int i = 0; i < files.length; i++) {
try {
PEMParser r = new PEMParser(new InputStreamReader(new FileInputStream(files[i])));
try {
Object o = r.readObject();
JcaPEMKeyConverter pemConverter = new JcaPEMKeyConverter();
pemConverter.setProvider("BC");
if (passwordFinder != null && o instanceof PEMEncryptedKeyPair) {
JcePEMDecryptorProviderBuilder decryptorBuilder = new JcePEMDecryptorProviderBuilder();
PEMDecryptorProvider pemDecryptor = decryptorBuilder.build(passwordFinder.getPassword());
o = pemConverter.getKeyPair(((PEMEncryptedKeyPair) o).decryptKeyPair(pemDecryptor));
}
if (o instanceof PEMKeyPair) {
o = pemConverter.getKeyPair((PEMKeyPair)o);
keys.add((KeyPair) o);
} else if (o instanceof KeyPair) {
keys.add((KeyPair) o);
}
} finally {
r.close();
}
} catch (Exception e) {
log.warn("Unable to read key {}: {}", files[i], e);
}
}
return keys;
}
}