org.apache.sshd.common.keyprovider.ClassLoadableResourceKeyPairProvider 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.security.KeyPair;
import java.util.Collection;
import java.util.Collections;

import org.apache.sshd.common.session.SessionContext;
import org.apache.sshd.common.util.ValidateUtils;
import org.apache.sshd.common.util.io.resource.ClassLoaderResource;
import org.apache.sshd.common.util.io.resource.IoResource;
import org.apache.sshd.common.util.threads.ThreadUtils;

/**
 * This provider loads private keys from the specified resources that are accessible via
 * {@link ClassLoader#getResourceAsStream(String)}. If no loader configured via {@link #setResourceLoader(ClassLoader)},
 * then {@link ThreadUtils#resolveDefaultClassLoader(Class)} is used
 *
 * @author Apache MINA SSHD Project
 */
public class ClassLoadableResourceKeyPairProvider extends AbstractResourceKeyPairProvider {
    private ClassLoader classLoader;
    private Collection resources;

    public ClassLoadableResourceKeyPairProvider() {
        this(Collections.emptyList());
    }

    public ClassLoadableResourceKeyPairProvider(ClassLoader cl) {
        this(cl, Collections.emptyList());
    }

    public ClassLoadableResourceKeyPairProvider(String res) {
        this(Collections.singletonList(ValidateUtils.checkNotNullAndNotEmpty(res, "No resource specified")));
    }

    public ClassLoadableResourceKeyPairProvider(ClassLoader cl, String res) {
        this(cl, Collections.singletonList(ValidateUtils.checkNotNullAndNotEmpty(res, "No resource specified")));
    }

    public ClassLoadableResourceKeyPairProvider(Collection resources) {
        this.classLoader = ThreadUtils.resolveDefaultClassLoader(getClass());
        this.resources = (resources == null) ? Collections.emptyList() : resources;
    }

    public ClassLoadableResourceKeyPairProvider(ClassLoader cl, Collection resources) {
        this.classLoader = cl;
        this.resources = (resources == null) ? Collections.emptyList() : resources;
    }

    public Collection getResources() {
        return resources;
    }

    public void setResources(Collection resources) {
        this.resources = (resources == null) ? Collections.emptyList() : resources;
    }

    public ClassLoader getResourceLoader() {
        return classLoader;
    }

    public void setResourceLoader(ClassLoader classLoader) {
        this.classLoader = classLoader;
    }

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

    @Override
    protected IoResource getIoResource(SessionContext session, String resource) {
        return new ClassLoaderResource(resolveClassLoader(), resource);
    }

    protected ClassLoader resolveClassLoader() {
        ClassLoader cl = getResourceLoader();
        if (cl == null) {
            cl = ThreadUtils.resolveDefaultClassLoader(getClass());
        }
        return cl;
    }
}