/*
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* Copyright 2014 gitblit.com.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.gitblit.transport.ssh;
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import java.io.File;
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import java.io.IOException;
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import java.net.InetSocketAddress;
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import java.text.MessageFormat;
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import java.util.concurrent.atomic.AtomicBoolean;
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import org.apache.sshd.server.keyprovider.PEMGeneratorHostKeyProvider;
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import org.eclipse.jgit.internal.JGitText;
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import org.eclipse.jgit.transport.resolver.ReceivePackFactory;
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import org.eclipse.jgit.transport.resolver.UploadPackFactory;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import com.gitblit.IStoredSettings;
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import com.gitblit.Keys;
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import com.gitblit.git.GitblitReceivePackFactory;
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import com.gitblit.git.GitblitUploadPackFactory;
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import com.gitblit.git.RepositoryResolver;
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import com.gitblit.manager.IGitblit;
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import com.gitblit.utils.StringUtils;
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/**
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* Manager for the ssh transport. Roughly analogous to the
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* {@link com.gitblit.git.GitDaemon} class.
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*
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* @author Eric Myhre
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*
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*/
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public class SshDaemon {
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private final Logger logger = LoggerFactory.getLogger(SshDaemon.class);
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/**
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* 22: IANA assigned port number for ssh. Note that this is a distinct concept
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* from gitblit's default conf for ssh port -- this "default" is what the git
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* protocol itself defaults to if it sees and ssh url without a port.
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*/
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public static final int DEFAULT_PORT = 22;
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private static final String HOST_KEY_STORE = "sshKeyStore.pem";
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private InetSocketAddress myAddress;
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private AtomicBoolean run;
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private SshCommandServer sshd;
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private RepositoryResolver<SshDaemonClient> repositoryResolver;
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private UploadPackFactory<SshDaemonClient> uploadPackFactory;
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private ReceivePackFactory<SshDaemonClient> receivePackFactory;
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/**
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* Construct the Gitblit SSH daemon.
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*
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* @param gitblit
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*/
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public SshDaemon(IGitblit gitblit) {
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IStoredSettings settings = gitblit.getSettings();
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int port = settings.getInteger(Keys.git.sshPort, 0);
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String bindInterface = settings.getString(Keys.git.sshBindInterface, "localhost");
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if (StringUtils.isEmpty(bindInterface)) {
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myAddress = new InetSocketAddress(port);
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} else {
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myAddress = new InetSocketAddress(bindInterface, port);
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}
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sshd = new SshCommandServer();
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sshd.setPort(myAddress.getPort());
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sshd.setHost(myAddress.getHostName());
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sshd.setup();
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sshd.setKeyPairProvider(new PEMGeneratorHostKeyProvider(new File(gitblit.getBaseFolder(), HOST_KEY_STORE).getPath()));
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sshd.setPublickeyAuthenticator(new SshKeyAuthenticator(gitblit));
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run = new AtomicBoolean(false);
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repositoryResolver = new RepositoryResolver<SshDaemonClient>(gitblit);
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uploadPackFactory = new GitblitUploadPackFactory<SshDaemonClient>(gitblit);
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receivePackFactory = new GitblitReceivePackFactory<SshDaemonClient>(gitblit);
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sshd.setCommandFactory(new SshCommandFactory(
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repositoryResolver,
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uploadPackFactory,
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receivePackFactory
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));
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}
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public int getPort() {
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return myAddress.getPort();
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}
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public String formatUrl(String gituser, String servername, String repository) {
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if (getPort() == DEFAULT_PORT) {
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// standard port
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return MessageFormat.format("{0}@{1}/{2}", gituser, servername, repository);
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} else {
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// non-standard port
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return MessageFormat.format("ssh://{0}@{1}:{2,number,0}/{3}", gituser, servername, getPort(), repository);
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}
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}
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/**
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* Start this daemon on a background thread.
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*
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* @throws IOException
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* the server socket could not be opened.
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* @throws IllegalStateException
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* the daemon is already running.
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*/
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public synchronized void start() throws IOException {
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if (run.get()) {
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throw new IllegalStateException(JGitText.get().daemonAlreadyRunning);
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}
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sshd.start();
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run.set(true);
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logger.info(MessageFormat.format("SSH Daemon is listening on {0}:{1,number,0}",
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myAddress.getAddress().getHostAddress(), myAddress.getPort()));
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}
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/** @return true if this daemon is receiving connections. */
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public boolean isRunning() {
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return run.get();
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}
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/** Stop this daemon. */
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public synchronized void stop() {
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if (run.get()) {
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logger.info("SSH Daemon stopping...");
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run.set(false);
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try {
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sshd.stop();
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} catch (InterruptedException e) {
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logger.error("SSH Daemon stop interrupted", e);
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}
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}
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}
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}
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