/*
* 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.keyprovider;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.nio.file.Files;
import java.nio.file.Path;
import java.security.GeneralSecurityException;
import java.security.KeyPair;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.Objects;
import org.apache.sshd.common.util.GenericUtils;
import org.apache.sshd.common.util.io.IoUtils;
/**
* This host key provider loads private keys from the specified files. The
* loading is <U>lazy</U> - i.e., a file is not loaded until it is actually
* required. Once required though, its loaded {@link KeyPair} result is
* <U>cached</U> and not re-loaded.
*
* @author <a href="mailto:dev@mina.apache.org">Apache MINA SSHD Project</a>
*/
public class FileKeyPairProvider extends AbstractResourceKeyPairProvider<Path> {
private Collection<? extends Path> files;
public FileKeyPairProvider() {
super();
}
public FileKeyPairProvider(Path path) {
this(Collections.singletonList(Objects.requireNonNull(path, "No path provided")));
}
public FileKeyPairProvider(Path... files) {
this(Arrays.asList(files));
}
public FileKeyPairProvider(Collection<? extends Path> files) {
this.files = files;
}
public Collection<? extends Path> getPaths() {
return files;
}
public void setFiles(Collection<File> files) {
setPaths(GenericUtils.map(files, File::toPath));
}
public void setPaths(Collection<? extends Path> paths) {
// use absolute path in order to have unique cache keys
Collection<Path> resolved = GenericUtils.map(paths, Path::toAbsolutePath);
resetCacheMap(resolved);
files = resolved;
}
@Override
public Iterable<KeyPair> loadKeys() {
return loadKeys(getPaths());
}
@Override
protected KeyPair doLoadKey(Path resource) throws IOException, GeneralSecurityException {
return super.doLoadKey((resource == null) ? null : resource.toAbsolutePath());
}
@Override
protected InputStream openKeyPairResource(String resourceKey, Path resource) throws IOException {
return Files.newInputStream(resource, IoUtils.EMPTY_OPEN_OPTIONS);
}
}