org.apache.sshd.common.keyprovider.FileKeyPairProvider Maven / Gradle / Ivy

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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

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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.sshd.common.keyprovider;

import java.io.IOException;
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.session.SessionContext;
import org.apache.sshd.common.util.GenericUtils;
import org.apache.sshd.common.util.io.resource.IoResource;
import org.apache.sshd.common.util.io.resource.PathResource;

/**
 * This host key provider loads private keys from the specified files. The loading is lazy - i.e., a file is not
 * loaded until it is actually required. Once required though, its loaded {@link KeyPair} result is cached and
 * not re-loaded.
 *
 * @author Apache MINA SSHD Project
 */
public class FileKeyPairProvider extends AbstractResourceKeyPairProvider {
    private Collection 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 files) {
        this.files = files;
    }

    public Collection getPaths() {
        return files;
    }

    public void setPaths(Collection paths) {
        // use absolute path in order to have unique cache keys
        Collection resolved = GenericUtils.map(paths, Path::toAbsolutePath);
        resetCacheMap(resolved);
        files = resolved;
    }

    @Override
    public Iterable loadKeys(SessionContext session) {
        return loadKeys(session, getPaths());
    }

    @Override
    protected IoResource getIoResource(SessionContext session, Path resource) {
        return (resource == null) ? null : new PathResource(resource);
    }

    @Override
    protected Iterable doLoadKeys(SessionContext session, Path resource)
            throws IOException, GeneralSecurityException {
        return super.doLoadKeys(session, (resource == null) ? null : resource.toAbsolutePath());
    }
}