ANT SCP Via a Java App

[Gareth Kelly <Ga...@davy.ie>]

Hi,
Not sure if this is the correct mailing list, but hopefully someone can help
me.
I have been using the ant and ant-jsch.jar in a java app to scp files from
one machine to another.
 
Works fine when passing in username and password.
I set up a trusted connection by creating a public/private key pair and
appending the identity.pub to the remote authorized_keys.
Now I can scp a file from the command line without a password.
 
But when I try to do this from the java app, i get the following error:
 
neither password nor passphrase for user nettrade has been given.  Can't
authenticate.
        at
org.apache.tools.ant.taskdefs.optional.ssh.Scp.execute(Scp.java:166)
        at GetReutersKey.scpFile(GetReutersKey.java:346)
        at GetReutersKey.main(GetReutersKey.java:65)
Caused by: neither password nor passphrase for user nettrade has been given.
Can't authenticate.
        at
org.apache.tools.ant.taskdefs.optional.ssh.Scp.parseUri(Scp.java:254)
        at
org.apache.tools.ant.taskdefs.optional.ssh.Scp.upload(Scp.java:223)
        at
org.apache.tools.ant.taskdefs.optional.ssh.Scp.execute(Scp.java:155)
        ... 2 more
--- Nested Exception ---
neither password nor passphrase for user nettrade has been given.  Can't
authenticate.
        at
org.apache.tools.ant.taskdefs.optional.ssh.Scp.parseUri(Scp.java:254)
        at
org.apache.tools.ant.taskdefs.optional.ssh.Scp.upload(Scp.java:223)
        at
org.apache.tools.ant.taskdefs.optional.ssh.Scp.execute(Scp.java:155)
        at GetReutersKey.scpFile(GetReutersKey.java:346)
        at GetReutersKey.main(GetReutersKey.java:65)

This is my code:
 
            Scp scpConnection = new Scp();
            Project project = new Project();
            scpConnection.setFile(aSFile);
            scpConnection.setTrust(true);
            scpConnection.setTodir("nettrade@laois <ma...@laois>
:" + aSDir);
            scpConnection.setProject(project);
            scpConnection.execute();

 
Any ideas?
 
Thanks,
Gareth


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Re: ANT SCP Via a Java App

[Atsuhiko Yamanaka <ym...@jcraft.com>]

Hi,

2006/5/9, Gareth Kelly <Ga...@davy.ie>:
> Works fine when passing in username and password.
> I set up a trusted connection by creating a public/private key pair and
> appending the identity.pub to the remote authorized_keys.

The internal ssh client can not understand ssh1 public/private key.

So, generate key pair by "ssh-keygen -t rsa" or "ssh-keygen -t dsa" and
you will have key-pair like "id_dsa, id_dsa.pub" or "id_rsa,id_rsa.pub".
And, you have to set its private key explicitly with setKeyfile method.

>            Scp scpConnection = new Scp();
>            Project project = new Project();
>            scpConnection.setFile(aSFile);

              scpConnection.setKeyfile("/home/nettrade/.ssh/id_dsa");

then, you must set something as a passphrase even if it is not
encrypted, because
there is a bug.

              scpConnection.setPassphrase("");

>            scpConnection.setTrust(true);
>            scpConnection.setTodir("nettrade@laois <ma...@laois>
> :" + aSDir);
>            scpConnection.setProject(project);
>            scpConnection.execute();

Dear developers, to resolve above bug, following lines in 
org/apache/tools/ant/taskdefs/optional/ssh/Scp.java

        if (getUserInfo().getPassword() == null
            && getUserInfo().getPassphrase() == null) {
            throw new BuildException("neither password nor passphrase for user"
                                     + getUserInfo().getName() + " has been "
                                     + "given.  Can't authenticate.");
        }

should be

        if (getUserInfo().getPassword() == null
            && (getUserInfo().getPassphrase() == null &&
getUserInfo().getKeyfile()==null)) {
            throw new BuildException("neither password nor passphrase for user"
                                     + getUserInfo().getName() + " has been "
                                     + "given.  Can't authenticate.");
        }

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