check out http://twistedmatrix.com/pipermail/twisted-python/2007-July/015793.html Eli Criffield On Tue, Aug 12, 2008 at 3:40 PM, Bill Zeller <wzeller@cs.princeton.edu> wrote:

Hi,

I've been playing around with Twisted's Conch client (which looks extremely well done, thanks!). I've been able to connect to a conch server and also connect to other ssh servers and execuate various commands. I'd like to be able to connect to an arbitrary SSH server and run /bin/bash.

I'm able to execute a command like so:

--------------------- class CommandChannel(channel.SSHChannel): .... def channelOpen(self, data): self.conn.sendRequest( self, 'exec', common.NS(self.command), wantReply=True).addCallback( self._gotResponse) ---------------------

Looking through the SSH spec (connect protocol, rfc4254), it looks like shells are opened with this command.

---------------------

byte SSH_MSG_CHANNEL_REQUEST

uint32 recipient channel string "shell" boolean want reply

---------------------

It doesn't look like Conch supports these requests (here's how CHANNEL_REQUESTs are currently sent out)

--------------------- (Twisted-8.1.0) twisted/conch/ssh/connection.py (413): self.transport.sendPacket(MSG_CHANNEL_REQUEST, struct.pack('>L', self.channelsToRemoteChannel[channel]) + common.NS(requestType)+chr(wantReply) + data) ---------------------

I may be misunderstanding how remote shells are started, so any help would be appreciated.

Again, I'm trying to launch an interactive /bin/bash shell from a Conch SSH client on an arbitrary remote SSH server.

Thanks for your time.

Best Regards, Bill Zeller

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