org.apache.camel.component.ssh.FileKeyPairProvider.java Source code

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Here is the source code for org.apache.camel.component.ssh.FileKeyPairProvider.java

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/**
 * 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;
    }

    public 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.toArray(new KeyPair[keys.size()]);
    }

}