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/*******************************************************************************
* Copyright (c) 2012 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.linuxtools.internal.ssh.proxy;
import java.net.URI;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.jface.window.Window;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.PlatformUI;
import com.jcraft.jsch.ChannelExec;
import com.jcraft.jsch.ChannelSftp;
import com.jcraft.jsch.JSch;
import com.jcraft.jsch.JSchException;
import com.jcraft.jsch.Session;
public class SSHBase {
private URI uri;
private JSch jsch;
private Session session;
private ChannelSftp channelSftp;
private static Map<String, String> passwords = new HashMap<>();
public SSHBase(URI uri) {
this.uri = uri;
jsch=new JSch();
}
private Session loadSession() throws CoreException {
if (session == null || !session.isConnected()) {
try {
session=jsch.getSession(uri.getUserInfo(), uri.getHost());
} catch (JSchException e) {
throw new CoreException(new Status(IStatus.ERROR, Activator.PLUGIN_ID, Messages.SSHBase_CreateSessionFailed + e.getMessage()));
}
Properties config = new Properties();
config.put("StrictHostKeyChecking", "no"); //$NON-NLS-1$, //$NON-NLS-2$
session.setConfig(config);
String password = passwords.get(uri.getAuthority());
if (password != null) {
session.setPassword(password);
try {
session.connect();
return session;
} catch (JSchException e) {
//Nothing to do. It will try again in next command
}
}
password = askPassword(uri.getUserInfo(), uri.getHost());
session.setPassword(password);
try {
session.connect();
} catch (JSchException e) {
throw new CoreException(new Status(IStatus.ERROR, Activator.PLUGIN_ID, Messages.SSHBase_CreateSessionFailed + e.getMessage()));
}
passwords.put(uri.getAuthority(), password);
}
return session;
}
private String askPassword(String user, String host) throws CoreException {
IWorkbenchWindow w = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
if (w == null) {
return ""; //$NON-NLS-1$
}
SSHPasswordDialog d = new SSHPasswordDialog(w.getShell(), user, host);
if (d.open() == Window.OK) {
return d.getPassword();
} else {
throw new CoreException(new Status(IStatus.ERROR, Activator.PLUGIN_ID, Messages.SSHBase_CreateSessionCancelled));
}
}
protected ChannelSftp getChannelSftp() throws CoreException {
loadSession();
if (channelSftp == null || !channelSftp.isConnected()) {
try {
channelSftp = (ChannelSftp)session.openChannel("sftp"); //$NON-NLS-1$
channelSftp.connect();
} catch (JSchException e) {
throw new CoreException(new Status(IStatus.ERROR, Activator.PLUGIN_ID, Messages.SSHBase_CreateSessionFailed + e.getMessage()));
}
}
return channelSftp;
}
protected ChannelExec createChannelExec() throws CoreException {
loadSession();
try {
return (ChannelExec)session.openChannel("exec"); //$NON-NLS-1$
} catch (JSchException e) {
throw new CoreException(new Status(IStatus.ERROR, Activator.PLUGIN_ID, Messages.SSHBase_CreateSessionFailed + e.getMessage()));
}
}
}
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