Hi,
Below is the chunk of code which connects to sftpserver using password
authentication:
SshClient client = null;
try {
client = SshClient.setUpDefaultClient();
client.start();
ConnectFuture future = client.connect(host, port);
future.await();
ClientSession session = future.getSession();
boolean auth = session.authPassword(login,
password).await()
.isSuccess();
if (auth) {
System.out.println("Authenticated....");
} else {
System.out.println("Authentication failed....");
}
ClientChannel channel =
session.createSubsystemChannel("sftp");
InputStream in = new
ByteArrayInputStream("ls".getBytes());
channel.setIn(in);
channel.setOut(System.out);
channel.setErr(System.err);
channel.open().await();
} catch (Throwable t) {
t.printStackTrace();
} finally {
// client.stop();
}
The authentication happens successfully,
My question here is, how to send sftp command request like "ls, pwd, cd,
get, put" etc. to sftpserver?
gnodet wrote:
>
> How did you configure the sshd server ? SFTP is not enabled by default and
> it looks like it has not been enabled.
>
> On Thu, Apr 12, 2012 at 19:25, manojkumar16 <[email protected]>
> wrote:
>
>>
>> Hi,
>> I have attached a java file ApacheSshClient.java. It makes a connection
>> to
>> sftpserver using apache ssh library. You need to put mina-core and
>> sshd-core
>> jar in the classpath. After running this class, I get following exception
>> at
>> client side:
>>
>> 2012-04-12 22:46:18,623 [NioProcessor-2 ] INFO UserAuthPassword
>> - Received SSH_MSG_USERAUTH_SUCCESS
>> Authenticated....
>> 2012-04-12 22:46:18,629 [main ] INFO ChannelSubsystem
>> - Send SSH_MSG_CHANNEL_OPEN on channel 0
>> 2012-04-12 22:46:18,631 [NioProcessor-2 ] INFO ClientSessionImpl
>> - Received SSH_MSG_CHANNEL_OPEN_CONFIRMATION on channel 0
>> 2012-04-12 22:46:18,632 [NioProcessor-2 ] INFO ChannelSubsystem
>> - Send SSH_MSG_CHANNEL_REQUEST subsystem...
>> 2012-04-12 22:46:18,633 [InputStreamPump] INFO ChannelSubsystem
>> - Send SSH_MSG_CHANNEL_EOF on channel 0
>> 2012-04-12 22:46:18,636 [NioProcessor-2 ] INFO ClientSessionImpl
>> - Closing session
>> 2012-04-12 22:46:18,637 [NioProcessor-2 ] INFO ChannelSubsystem
>> - Closing channel 0 immediately
>>
>>
>>
>> I am using apache sshd server. At the server side, I got below
>> exceptions:
>>
>> 2012-04-12 22:46:18,633 [NioProcessor-16] INFO ChannelSession
>> - Received channel request: subsystem
>> 2012-04-12 22:46:18,639 [NioProcessor-16] INFO ChannelSession
>> - Received SSH_MSG_CHANNEL_EOF on channel 0
>> 2012-04-12 22:46:18,639 [NioProcessor-16] INFO ServerSession
>> - Closing session
>> 2012-04-12 22:46:18,639 [NioProcessor-16] INFO ChannelSession
>> - Closing channel 0 immediately
>> 2012-04-12 22:46:18,639 [Thread-18 ] INFO ChannelSession
>> - Send SSH_MSG_CHANNEL_EOF on channel 0
>> 2012-04-12 22:46:18,640 [Thread-18 ] INFO ChannelSession
>> - Send SSH_MSG_CHANNEL_REQUEST exit-status on channel 0
>> 2012-04-12 22:46:18,640 [Thread-18 ] INFO ChannelSession
>> - Send SSH_MSG_CHANNEL_CLOSE on channel 0
>>
>>
>> The server throws this exception because client sends SSH_MSG_CHANNEL_EOF
>> request to the server.
>> My question is why client is closing the connection after successful
>> authentication?
>>
>> When I run ApacheSshClient.java class in debug mode, I get below
>> exceptions
>> at client side:
>>
>> 2012-04-12 22:52:42,577 [NioProcessor-2 ] INFO UserAuthPassword
>> - Received SSH_MSG_USERAUTH_SUCCESS
>> Authenticated....
>> 2012-04-12 22:52:48,985 [main ] INFO ChannelSubsystem
>> - Send SSH_MSG_CHANNEL_OPEN on channel 0
>> 2012-04-12 22:52:49,186 [NioProcessor-2 ] INFO ClientSessionImpl
>> - Received SSH_MSG_CHANNEL_OPEN_CONFIRMATION on channel 0
>> 2012-04-12 22:52:49,187 [NioProcessor-2 ] INFO ChannelSubsystem
>> - Send SSH_MSG_CHANNEL_REQUEST subsystem...
>> 2012-04-12 22:52:49,207 [NioProcessor-2 ] INFO ClientSessionImpl
>> - Closing session
>> 2012-04-12 22:52:49,210 [NioProcessor-2 ] INFO ChannelSubsystem
>> - Closing channel 0 immediately
>>
>>
>> At server side:
>>
>> 2012-04-12 22:52:49,195 [NioProcessor-17] INFO ChannelSession
>> - Received channel request: subsystem
>> 2012-04-12 22:52:49,210 [NioProcessor-17] INFO ServerSession
>> - Closing session
>> 2012-04-12 22:52:49,210 [NioProcessor-17] INFO ChannelSession
>> - Closing channel 0 immediately
>> 2012-04-12 22:52:49,228 [Thread-19 ] INFO ChannelSession
>> - Send SSH_MSG_CHANNEL_EOF on channel 0
>> 2012-04-12 22:52:49,228 [Thread-19 ] INFO ChannelSession
>> - Send SSH_MSG_CHANNEL_REQUEST exit-status on channel 0
>> 2012-04-12 22:52:49,228 [Thread-19 ] INFO ChannelSession
>> - Send SSH_MSG_CHANNEL_CLOSE on channel 0
>>
>>
>> It seems, sftpserver is properly creating subsystem, but soon after
>> connection gets disconnected when sftpclient closes its connection.
>>
>> What is the way to execute sftp specific command like put,get,pwd,cd
>> etc...
>>
>>
>> gnodet wrote:
>> >
>> > It's really hard to tell without more informations.
>> > Make sure you enabled sftp support on the sshd server side, maybe
>> provide
>> > the sshd logs at debug level in order to see what happen.
>> > Last, maybe a good way would be to provide a test case that I could run
>> to
>> > replicate your problem.
>> >
>> > On Thu, Apr 12, 2012 at 15:09, manojkumar16 <[email protected]>
>> > wrote:
>> >
>> >>
>> >> Hi Guillaume,
>> >> There is no such thing... I will surely use the mailing lists for
>> further
>> >> communications.
>> >> Long time back I asked for the help regarding the implementation of
>> >> sftpclient using apache sshd library...
>> >> My plan is to execute sftp commands in sftp subsystem mode.
>> >> In my entry class, I have added chunk of code shown below:
>> >>
>> >> ClientChannel channel =
>> >> session.createSubsystemChannel( "sftp" );
>> >> InputStream in = new ByteArrayInputStream(
>> >> "ls".getBytes() );
>> >> channel.setIn(in);
>> >> channel.setOut(System.out);
>> >> channel.setErr(System.err);
>> >> channel.open().await();
>> >>
>> >> And in ChannelSubsystem.java class, below api is provided:
>> >>
>> >> protected void doOpen() throws Exception {
>> >> super.doOpen();
>> >> log.info("Send SSH_MSG_CHANNEL_REQUEST subsystem...");
>> >> Buffer buffer =
>> >> session.createBuffer(SshConstants.Message.SSH_MSG_CHANNEL_REQUEST, 0);
>> >> buffer.putInt(recipient);
>> >> buffer.putString("subsystem");
>> >> buffer.putBoolean(true);
>> >> buffer.putString(subsystem);
>> >> session.writePacket(buffer);
>> >> }
>> >>
>> >>
>> >> After executing the entry class I got following logs:
>> >> 2012-04-12 18:25:14,106 [main ] INFO ChannelSubsystem
>> >> - Send SSH_MSG_CHANNEL_OPEN on channel 0
>> >> 2012-04-12 18:25:18,202 [NioProcessor-2 ] INFO ClientSessionImpl
>> >> - Received SSH_MSG_CHANNEL_OPEN_CONFIRMATION on channel 0
>> >> 2012-04-12 18:25:18,204 [NioProcessor-2 ] INFO ChannelSubsystem
>> >> - Send SSH_MSG_CHANNEL_REQUEST subsystem...
>> >> 2012-04-12 18:25:18,227 [NioProcessor-2 ] INFO ClientSessionImpl
>> >> - Closing session
>> >> 2012-04-12 18:25:18,230 [NioProcessor-2 ] INFO ChannelSubsystem
>> >> - Closing channel 0 immediately
>> >>
>> >>
>> >> My question here is, why is it closing the session after sending
>> >> SSH_MSG_CHANNEL_REQUEST for subsystem?
>> >>
>> >>
>> >>
>> >> gnodet wrote:
>> >> >
>> >> > Unless there's a need for secrecy, using the mailing lists is
>> usually
>> a
>> >> > good idea so that everyone can get involved.
>> >> >
>> >> > On Thu, Apr 12, 2012 at 14:47, manojkumar16 <[email protected]>
>> >> > wrote:
>> >> >
>> >> >>
>> >> >> Actually, I do not want to use Jsch library... Since, Apache sshd
>> has
>> >> >> provided well-written ssh library for both client and server, I
>> want
>> >> to
>> >> >> focus more on implementing sftp client using apache sshd library.
>> >> >> Can you reach me on [email protected] so that I can explain
>> you
>> >> >> exactly
>> >> >> what I am doing for sftp client implementation using apache sshd
>> >> library?
>> >> >>
>> >> >>
>> >> >> David Latorre wrote:
>> >> >> >
>> >> >> > For SFTP-client support there are several options, in our case,
>> we
>> >> use
>> >> >> > apache commons vfs with JSCH libraries. Would that work for you?
>> >> >> >
>> >> >> >
>> >> >> >
>> >> >> >
>> >> >> > 2012/1/23 Guillaume Nodet <[email protected]>:
>> >> >> >> Oh, I missed you were talking about sftp. The problem is that
>> >> we've
>> >> >> >> mostly focused on the server side, so the client side is still
>> >> lacking
>> >> >> >> lots of features. And the sftp support is one of them
>> >> unfortunately.
>> >> >> >>
>> >> >> >>
>> >> >> >> On Mon, Jan 23, 2012 at 09:48, Guillaume Nodet
>> <[email protected]>
>> >> >> wrote:
>> >> >> >>> You can find a real working example of using the client side in
>> >> >> Apache
>> >> >> >>> Karaf:
>> >> >> >>>
>> >> >>
>> >>
>> https://github.com/apache/karaf/blob/trunk/client/src/main/java/org/apache/karaf/client/Main.java
>> >> >> >>>
>> >> >> >>> The basic idea is to open a channel which is either a "shell"
>> >> channel
>> >> >> >>> for an interactive session or an "exec" channel to execute a
>> >> single
>> >> >> >>> command and exit without any user interaction.
>> >> >> >>> The channel has an input stream and two output streams (out and
>> >> err)
>> >> >> >>> which you can set to redirect to the default System.out and
>> >> >> System.err
>> >> >> >>> or to your own in-memory stream or whatever kind of streams you
>> >> want.
>> >> >> >>>
>> >> >> >>> On Mon, Jan 23, 2012 at 08:16, manoj kumar
>> >> <[email protected]>
>> >> >> >>> wrote:
>> >> >> >>>> Hi,
>> >> >> >>>>
>> >> >> >>>> I want to write sftp Client using apache-sshd mina client api.
>> I
>> >> am
>> >> >> >>>> able to
>> >> >> >>>> connect to sftp server using apache ssh client but I do not
>> have
>> >> any
>> >> >> >>>> idea
>> >> >> >>>> how to send sftp command to apache sshd server and how do I
>> get
>> >> >> result
>> >> >> >>>> of
>> >> >> >>>> sftp client. I am totally lost. Please guide me. I have
>> confusion
>> >> on
>> >> >> >>>> below
>> >> >> >>>> code:
>> >> >> >>>>
>> >> >> >>>> SshClient client = SshClient.setUpDefaultClient();
>> >> >> >>>> client.start();
>> >> >> >>>> ClientSession session = client.connect("localhost",
>> >> >> >>>> port).await().getSession();
>> >> >> >>>> session.authPassword("smx", "smx");
>> >> >> >>>> ClientChannel channel =
>> >> >> >>>> session.createChannel(ClientChannel.CHANNEL_SHELL);
>> >> >> >>>> ByteArrayOutputStream sent = new
>> ByteArrayOutputStream();
>> >> >> >>>> PipedOutputStream pipedIn = new
>> >> TeePipedOutputStream(sent);
>> >> >> >>>> channel.setIn(new PipedInputStream(pipedIn));
>> >> >> >>>> ByteArrayOutputStream out = new
>> ByteArrayOutputStream();
>> >> >> >>>> ByteArrayOutputStream err = new
>> ByteArrayOutputStream();
>> >> >> >>>> channel.setOut(out);
>> >> >> >>>> channel.setErr(err);
>> >> >> >>>> channel.open().await();
>> >> >> >>>>
>> >> >> >>>> --
>> >> >> >>>> Thanks and Regards,
>> >> >> >>>> Manoj Kumar
>> >> >> >>>> 9535214528
>> >> >> >>>
>> >> >> >>>
>> >> >> >>>
>> >> >> >>> --
>> >> >> >>> ------------------------
>> >> >> >>> Guillaume Nodet
>> >> >> >>> ------------------------
>> >> >> >>> Blog: http://gnodet.blogspot.com/
>> >> >> >>> ------------------------
>> >> >> >>> FuseSource, Integration everywhere
>> >> >> >>> http://fusesource.com
>> >> >> >>
>> >> >> >>
>> >> >> >>
>> >> >> >> --
>> >> >> >> ------------------------
>> >> >> >> Guillaume Nodet
>> >> >> >> ------------------------
>> >> >> >> Blog: http://gnodet.blogspot.com/
>> >> >> >> ------------------------
>> >> >> >> FuseSource, Integration everywhere
>> >> >> >> http://fusesource.com
>> >> >> >
>> >> >> >
>> >> >>
>> >> >> --
>> >> >> View this message in context:
>> >> >>
>> >>
>> http://old.nabble.com/sshClient-in-apache-sshd-mina-tp33186423p33675023.html
>> >> >> Sent from the Apache MINA User Forum mailing list archive at
>> >> Nabble.com.
>> >> >>
>> >> >>
>> >> >
>> >> >
>> >> > --
>> >> > ------------------------
>> >> > Guillaume Nodet
>> >> > ------------------------
>> >> > Blog: http://gnodet.blogspot.com/
>> >> > ------------------------
>> >> > FuseSource, Integration everywhere
>> >> > http://fusesource.com
>> >> >
>> >> >
>> >>
>> >> --
>> >> View this message in context:
>> >>
>> http://old.nabble.com/sshClient-in-apache-sshd-mina-tp33186423p33675184.html
>> >> Sent from the Apache MINA User Forum mailing list archive at
>> Nabble.com.
>> >>
>> >>
>> >
>> >
>> > --
>> > ------------------------
>> > Guillaume Nodet
>> > ------------------------
>> > Blog: http://gnodet.blogspot.com/
>> > ------------------------
>> > FuseSource, Integration everywhere
>> > http://fusesource.com
>> >
>> >
>> http://old.nabble.com/file/p33676989/ApacheSshClient.java
>> ApacheSshClient.java
>> --
>> View this message in context:
>> http://old.nabble.com/sshClient-in-apache-sshd-mina-tp33186423p33676989.html
>> Sent from the Apache MINA User Forum mailing list archive at Nabble.com.
>>
>>
>
>
> --
> ------------------------
> Guillaume Nodet
> ------------------------
> Blog: http://gnodet.blogspot.com/
> ------------------------
> FuseSource, Integration everywhere
> http://fusesource.com
>
>
--
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