From 1bbd47459c3ea8c1b3235b386a2630c7c11125dc Mon Sep 17 00:00:00 2001
From: Udo Walter
Date: Tue, 27 Mar 2018 17:34:25 +0200
Subject: [RemoteReboot] Switched from the jcabi-ssh library to the jsch
 library.

---
 pom.xml                                            |  6 +--
 .../openslx/taskmanager/tasks/RemoteReboot.java    | 54 ++++++++++++++++++----
 2 files changed, 47 insertions(+), 13 deletions(-)

diff --git a/pom.xml b/pom.xml
index 7fe7fc7..0eab9c2 100644
--- a/pom.xml
+++ b/pom.xml
@@ -111,9 +111,9 @@
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
-			<groupId>com.jcabi</groupId>
-			<artifactId>jcabi-ssh</artifactId>
-			<version>1.5.2</version>
+			<groupId>com.jcraft</groupId>
+			<artifactId>jsch</artifactId>
+			<version>0.1.54</version>
 		</dependency>
 	</dependencies>
 </project>
diff --git a/src/main/java/org/openslx/taskmanager/tasks/RemoteReboot.java b/src/main/java/org/openslx/taskmanager/tasks/RemoteReboot.java
index 9f450b6..38a9c12 100644
--- a/src/main/java/org/openslx/taskmanager/tasks/RemoteReboot.java
+++ b/src/main/java/org/openslx/taskmanager/tasks/RemoteReboot.java
@@ -1,6 +1,5 @@
 package org.openslx.taskmanager.tasks;
 
-import java.io.IOException;
 import java.net.InetSocketAddress;
 import java.net.Socket;
 import java.text.SimpleDateFormat;
@@ -17,8 +16,10 @@ import java.util.concurrent.TimeUnit;
 import org.openslx.taskmanager.api.AbstractTask;
 
 import com.google.gson.annotations.Expose;
-import com.jcabi.ssh.SSH;
-import com.jcabi.ssh.Shell;
+import com.jcraft.jsch.ChannelExec;
+import com.jcraft.jsch.JSch;
+import com.jcraft.jsch.JSchException;
+import com.jcraft.jsch.Session;
 
 public class RemoteReboot extends AbstractTask
 {
@@ -42,6 +43,8 @@ public class RemoteReboot extends AbstractTask
 
 	@Expose
 	private int port;
+	
+	private JSch sshClient;
 
 	private Output status = new Output();
 
@@ -73,6 +76,16 @@ public class RemoteReboot extends AbstractTask
 		status.time = sdf.format( shutdownTime );
 		status.locationId = locationId;
 		status.locationName = locationName;
+
+		JSch.setConfig("StrictHostKeyChecking", "no");
+		sshClient = new JSch();
+		try {
+			sshClient.addIdentity("", sshkey.getBytes(), null, null);
+		} catch ( JSchException e ) {
+			status.addError( e.toString() );
+			return false;
+		}
+
 		return true;
 	}
 
@@ -89,25 +102,36 @@ public class RemoteReboot extends AbstractTask
 				status.addError( "null Client or missing ip/uuid in list, ignoring." );
 				continue;
 			}
-			status.clientStatus.put( client.machineuuid, ClientStatus.CONNECTING );
 			tp.submit( new Runnable() {
 				public void run()
 				{
 					int ret = -1;
 					try {
-						Shell shell = new SSH( client.clientip, port, "root", sshkey );
-						String args = " " + minutes + " " + SSH.escape( client.machineuuid );
+						status.clientStatus.put( client.machineuuid, ClientStatus.CONNECTING );
+						Session session = sshClient.getSession("root", client.clientip, port);
+						session.connect(5000);
+						ChannelExec channel = (ChannelExec) session.openChannel("exec");
+
+						String args = " " + minutes + " " + String.format("'%s'", client.machineuuid.replace("'", "'\\''"));
 						if ( shutdown ) {
-							ret = new Shell.Empty( shell ).exec( SHUTDOWN_CMD + args );
+							channel.setCommand( SHUTDOWN_CMD + args );
+							channel.connect(2000);
+							waitForCommand(channel, 2000);
+							ret = channel.getExitStatus();
 							status.clientStatus.put( client.machineuuid, minutes == 0 ? ClientStatus.SHUTDOWN : ClientStatus.SHUTDOWN_AT );
 						} else {
-							ret = new Shell.Empty( shell ).exec( REBOOT_CMD + args );
+							channel.setCommand( REBOOT_CMD + args );
+							channel.connect(2000);
+							waitForCommand(channel, 2000);
+							ret = channel.getExitStatus();
 							if ( ret == 0 ) {
 								status.clientStatus.put( client.machineuuid, minutes == 0 ? ClientStatus.REBOOTING : ClientStatus.REBOOT_AT );
 								rebootingClients.add( client );
 							}
 						}
-					} catch ( IOException e ) {
+						channel.disconnect();
+						session.disconnect();
+					} catch ( JSchException e ) {
 						if ( e.toString().contains( "Auth fail" ) ) {
 							status.clientStatus.put( client.machineuuid, ClientStatus.AUTH_FAIL );
 							ret = 0;
@@ -116,6 +140,7 @@ public class RemoteReboot extends AbstractTask
 							ret = -1;
 						}
 					}
+
 					if ( ret != 0 ) {
 						if ( ret != -1 ) {
 							status.addError( client.clientip + ": Exit Code " + ret );
@@ -184,6 +209,15 @@ public class RemoteReboot extends AbstractTask
 
 		return true;
 	}
+	
+	private void waitForCommand(ChannelExec channel, int timeout) {
+		for ( int i = 0; i < timeout / 100; i++ ) {
+			if ( channel.isClosed() ) { break; }
+			try {
+				Thread.sleep(100);
+			} catch (InterruptedException e) {}
+		}
+	}
 
 	private boolean isOnline( String address, int... ports )
 	{
@@ -210,7 +244,7 @@ public class RemoteReboot extends AbstractTask
 		private String locationName;
 		private String error;
 
-		private void addError( String e )
+		private synchronized void addError( String e )
 		{
 			if ( error == null ) {
 				error = e + "\n";
-- 
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