SCP upload to Windows 11 Open SSH fails with no such file or directory error #929
Description
We are using SSHJ to add remoting capabilities to our app. We are currently testing cross-platform capabilities where the client is running on Linux connecting to a Windows 11 Enterprise server using the OpenSSH server provided by the Windows distribution. SSH is working fine. SCP download is working fine. SCP upload is failing with:
Exception in thread "main" net.schmizz.sshj.xfer.scp.SCPRemoteException: Remote SCP command had error: scp: 'c:\Temp\model.yaml': No such file or directory
at net.schmizz.sshj.xfer.scp.SCPEngine.check(SCPEngine.java:73)
at net.schmizz.sshj.xfer.scp.SCPEngine.sendMessage(SCPEngine.java:133)
at net.schmizz.sshj.xfer.scp.SCPUploadClient.sendFile(SCPUploadClient.java:105)
at net.schmizz.sshj.xfer.scp.SCPUploadClient.process(SCPUploadClient.java:84)
at net.schmizz.sshj.xfer.scp.SCPUploadClient.startCopy(SCPUploadClient.java:76)
at net.schmizz.sshj.xfer.scp.SCPUploadClient.copy(SCPUploadClient.java:54)
at net.schmizz.sshj.xfer.scp.SCPUploadClient.copy(SCPUploadClient.java:47)
at net.schmizz.sshj.xfer.scp.SCPUploadClient.copy(SCPUploadClient.java:43)
at net.schmizz.sshj.xfer.scp.SCPFileTransfer.upload(SCPFileTransfer.java:98)
at net.schmizz.sshj.xfer.scp.SCPFileTransfer.upload(SCPFileTransfer.java:61)
at net.schmizz.sshj.xfer.scp.SCPFileTransfer.upload(SCPFileTransfer.java:55)
at com.oracle.test.SSHTest.main(SSHTest.java:36)
The odd thing is that scp from the command-line works fine.
[rpatrick@rpatrick-1 ssh-test]$ scp ./model.yaml rpatrick@<internal-hostname-redacted>:c:\\Temp\\model.yaml
model.yaml 100% 486 238.1KB/s 00:00
[rpatrick@rpatrick-1 ssh-test]$
My code is just a little sample that I created trying to debug this problem. As you can see, it isn't doing anything fancy and is allowing SSHJ to get the default username and SSH private key (from ~/.ssh/id_rsa).
package com.oracle.test;
import java.io.IOException;
import java.util.concurrent.TimeUnit;
import net.schmizz.sshj.SSHClient;
import net.schmizz.sshj.common.IOUtils;
import net.schmizz.sshj.connection.channel.direct.Session;
import net.schmizz.sshj.connection.channel.direct.Session.Command;
import net.schmizz.sshj.xfer.scp.SCPFileTransfer;
public class SSHTest {
public static void main(String[] args) throws Exception {
try (SSHClient sshClient = new SSHClient()) {
sshClient.loadKnownHosts();
sshClient.connect("<internal-hostname-redacted>");
Session session = null;
try {
sshClient.authPublickey(System.getProperty("user.name"));
session = sshClient.startSession();
final Command cmd = session.exec("wmic os get caption");
System.out.print(IOUtils.readFully(cmd.getInputStream()));
cmd.join(5, TimeUnit.SECONDS);
System.out.println("\n** exit status: " + cmd.getExitStatus() + "\n\n");
SCPFileTransfer scpFileTransfer = sshClient.newSCPFileTransfer();
scpFileTransfer.download("c:\\Temp\\ssh\\model.yaml", "./model.yaml");
System.out.println("Downloaded file\n\n");
scpFileTransfer = sshClient.newSCPFileTransfer();
scpFileTransfer.upload("./model.yaml", "c:\\Temp\\model.yaml");
System.out.println("Uploaded file\n\n");
} finally {
if (session != null) {
try { session.close(); } catch (IOException ex) { /* ignore */ }
}
sshClient.disconnect();
}
}
}
}
In the output from this program, I see the following before the stack trace:
Caption
Microsoft Windows 11 Enterprise
** exit status: 0
Downloaded file
Exception in thread "main" net.schmizz.sshj.xfer.scp.SCPRemoteException: Remote SCP command had error: scp: 'c:\Temp\model.yaml': No such file or directory
...