/*
* 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.karaf.client;
import java.io.*;
import java.net.URL;
import java.nio.charset.Charset;
import java.security.KeyPair;
import java.util.Locale;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.BlockingQueue;
import jline.Terminal;
import org.apache.karaf.shell.console.jline.TerminalFactory;
import org.apache.sshd.ClientChannel;
import org.apache.sshd.ClientSession;
import org.apache.sshd.SshClient;
import org.apache.sshd.agent.SshAgent;
import org.apache.sshd.agent.local.AgentImpl;
import org.apache.sshd.agent.local.LocalAgentFactory;
import org.apache.sshd.client.channel.ChannelShell;
import org.apache.sshd.client.future.ConnectFuture;
import org.apache.sshd.common.RuntimeSshException;
import org.fusesource.jansi.AnsiConsole;
import org.slf4j.impl.SimpleLogger;
/**
* A very simple
*/
public class Main {
public static void main(String[] args) throws Exception {
String host = "localhost";
int port = 8101;
String user = "karaf";
String password = null;
StringBuilder sb = new StringBuilder();
int level = 1;
int retryAttempts = 0;
int retryDelay = 2;
boolean batch = false;
String file = null;
for (int i = 0; i < args.length; i++) {
if (args[i].charAt(0) == '-') {
if (args[i].equals("-a")) {
port = Integer.parseInt(args[++i]);
} else if (args[i].equals("-h")) {
host = args[++i];
} else if (args[i].equals("-u")) {
user = args[++i];
} else if (args[i].equals("-v")) {
level++;
} else if (args[i].equals("-r")) {
retryAttempts = Integer.parseInt(args[++i]);
} else if (args[i].equals("-p")) {
password = args[++i];
} else if (args[i].equals("-d")) {
retryDelay = Integer.parseInt(args[++i]);
} else if (args[i].equals("-b")) {
batch = true;
} else if (args[i].equals("-f")) {
file = args[++i];
} else if (args[i].equals("--help")) {
System.out.println("Apache Karaf client");
System.out.println(" -a [port] specify the port to connect to");
System.out.println(" -h [host] specify the host to connect to");
System.out.println(" -u [user] specify the user name");
System.out.println(" -p [password] specify the password (optional, if not provided, the password is prompted)");
System.out.println(" NB: this option is deprecated and will be removed in next Karaf version");
System.out.println(" --help shows this help message");
System.out.println(" -v raise verbosity");
System.out.println(" -r [attempts] retry connection establishment (up to attempts times)");
System.out.println(" -d [delay] intra-retry delay (defaults to 2 seconds)");
System.out.println(" -b batch mode, specify multiple commands via standard input");
System.out.println(" -f [file] read commands from the specified file");
System.out.println(" [commands] commands to run");
System.out.println("If no commands are specified, the client will be put in an interactive mode");
System.exit(0);
} else {
System.err.println("Unknown option: " + args[i]);
System.err.println("Run with --help for usage");
System.exit(1);
}
} else {
sb.append(args[i]);
sb.append(' ');
}
}
SimpleLogger.setLevel(level);
if (file != null) {
Reader reader = new BufferedReader(new InputStreamReader(new FileInputStream(file)));
try {
sb.setLength(0);
for (int c = reader.read(); c >= 0; c = reader.read()) {
sb.append((char) c);
}
} finally {
reader.close();
}
} else if (batch) {
// read all stdin
Reader reader = new BufferedReader(new InputStreamReader(System.in));
sb.setLength(0);
for (int c = reader.read(); c >= 0; c = reader.read()) {
sb.append((char) c);
}
}
SshClient client = null;
Terminal terminal = null;
SshAgent agent = null;
try {
agent = startAgent(user);
client = SshClient.setUpDefaultClient();
client.setAgentFactory(new LocalAgentFactory(agent));
client.getProperties().put(SshAgent.SSH_AUTHSOCKET_ENV_NAME, "local");
client.start();
int retries = 0;
ClientSession session = null;
do {
ConnectFuture future = client.connect(host, port);
future.await();
try {
session = future.getSession();
} catch (RuntimeSshException ex) {
if (retries++ < retryAttempts) {
Thread.sleep(retryDelay * 1000);
System.out.println("retrying (attempt " + retries + ") ...");
} else {
throw ex;
}
}
} while (session == null);
if (!session.authAgent(user).await().isSuccess()) {
if (password == null) {
Console console = System.console();
if (console != null) {
char[] readPassword = console.readPassword("Password: ");
if (readPassword != null) {
password = new String(readPassword);
}
} else {
throw new Exception("Unable to prompt password: could not get system console");
}
}
if (!session.authPassword(user, password).await().isSuccess()) {
throw new Exception("Authentication failure");
}
}
ClientChannel channel;
if (sb.length() > 0) {
channel = session.createChannel("exec", sb.append("\n").toString());
channel.setIn(new ByteArrayInputStream(new byte[0]));
} else {
terminal = new TerminalFactory().getTerminal();
channel = session.createChannel("shell");
ConsoleInputStream in = new ConsoleInputStream(terminal.wrapInIfNeeded(System.in));
new Thread(in).start();
channel.setIn(in);
((ChannelShell) channel).setPtyColumns(terminal != null ? terminal.getWidth() : 80);
((ChannelShell) channel).setupSensibleDefaultPty();
((ChannelShell) channel).setAgentForwarding(true);
String ctype = System.getenv("LC_CTYPE");
if (ctype == null) {
ctype = Locale.getDefault().toString() + "."
+ System.getProperty("input.encoding", Charset.defaultCharset().name());
}
((ChannelShell) channel).setEnv("LC_CTYPE", ctype);
}
channel.setOut(AnsiConsole.wrapOutputStream(System.out));
channel.setErr(AnsiConsole.wrapOutputStream(System.err));
channel.open();
channel.waitFor(ClientChannel.CLOSED, 0);
} catch (Throwable t) {
if (level > 1) {
t.printStackTrace();
} else {
System.err.println(t.getMessage());
}
System.exit(1);
} finally {
try {
client.stop();
} catch (Throwable t) { }
try {
if (terminal != null) {
terminal.restore();
}
} catch (Throwable t) { }
}
System.exit(0);
}
protected static SshAgent startAgent(String user) {
try {
SshAgent local = new AgentImpl();
URL url = Main.class.getClassLoader().getResource("karaf.key");
InputStream is = url.openStream();
ObjectInputStream r = new ObjectInputStream(is);
KeyPair keyPair = (KeyPair) r.readObject();
local.addIdentity(keyPair, "karaf");
return local;
} catch (Throwable e) {
System.err.println("Error starting ssh agent for: " + e.getMessage());
return null;
}
}
public static String readLine(String msg) throws IOException {
StringBuffer sb = new StringBuffer();
System.err.print(msg);
System.err.flush();
for (;;) {
int c = System.in.read();
if (c < 0) {
return null;
}
System.err.print((char) c);
if (c == '\r' || c == '\n') {
break;
}
sb.append((char) c);
}
return sb.toString();
}
private static class ConsoleInputStream extends InputStream implements Runnable {
private InputStream in;
private boolean eof = false;
private final BlockingQueue<Integer> queue = new ArrayBlockingQueue<Integer>(1024);
public ConsoleInputStream(InputStream in) {
this.in = in;
}
private int read(boolean wait) throws IOException
{
if (eof && queue.isEmpty()) {
return -1;
}
Integer i;
if (wait) {
try {
i = queue.take();
} catch (InterruptedException e) {
throw new InterruptedIOException();
}
} else {
i = queue.poll();
}
if (i == null) {
return -1;
}
return i;
}
@Override
public int read() throws IOException
{
return read(true);
}
@Override
public int read(byte b[], int off, int len) throws IOException
{
if (b == null) {
throw new NullPointerException();
} else if (off < 0 || len < 0 || len > b.length - off) {
throw new IndexOutOfBoundsException();
} else if (len == 0) {
return 0;
}
int nb = 1;
int i = read(true);
if (i < 0) {
return -1;
}
b[off++] = (byte) i;
while (nb < len) {
i = read(false);
if (i < 0) {
return nb;
}
b[off++] = (byte) i;
nb++;
}
return nb;
}
@Override
public int available() throws IOException {
return queue.size();
}
public void run() {
try {
while (true) {
try {
int c = in.read();
if (c == -1) {
return;
}
queue.put(c);
} catch (Throwable t) {
return;
}
}
} finally {
eof = true;
try {
queue.put(-1);
} catch (InterruptedException e) {
}
}
}
}
}