Win32 SCP problems

From: Claire (perdita_at_mcc.ac.uk)
Date: 10/07/03 

Date: Tue, 7 Oct 2003 14:13:34 +0000 (UTC)

I have openssh on win32 and can connect to it with passphraseless key
exchange with no problem to run commands or scp to or from, as long as
I put a stupid number of \\ in.

However, I wanted to be able to lock this access down for both
auditing and access reasons. On unix I have a script restrict.sh
which permits scp either way and scripts in a certain location to be
run and this works fine when specified in the authorized_keys file
like so:
        command="/path/restrict.sh", no-pty (etc)

I have written an equivalent script in perl, restrict.pl, and this
works equally well for all purposes on UNIX.

So I installed it onto the Win2k system and I am having some success with
the syntax:
        command="cmd.exe /C c:\\\\path\\\\restrict.pl", no-pty (etc)

This is running allowed commands ok, although STDOUT never seems to
get back to the calling window but I can live with that.

scp, though, is hanging:

debug1: Remote: Forced command: cmd.exe /C
c:\\\\interface\\\distrib\\\\.ssh\\\\restrict.pl
debug1: Remote: Pty allocation disabled.
debug1: ssh-userauth2 successful: method publickey
debug1: fd 4 setting O_NONBLOCK
debug1: fd 5 setting O_NONBLOCK
debug1: channel 0: new [client-session]
debug3: ssh_session2_open: channel_new: 0
debug1: send channel open 0
debug1: Entering interactive session.
debug2: callback start
debug1: ssh_session2_setup: id 0
debug1: Sending command: scp -v -t c:\\\temp
debug1: channel request 0: exec
debug2: callback done
debug1: channel 0: open confirm rwindow 0 rmax 32768
debug2: channel 0: rcvd adjust 131072

forever. Until I kill it.

Does anyone have any ideas why that might be? I've tried the example
scp_wrapper script from the SSH book website and that just dies in
weirder ways (lost connection). I've tried cmd.exe with /C, with no
parameters and with /K and /C is the only one that works for ssh
commands and it doesn't hang, but does the 'lost connection' thing for
scp.

I also tried using cygwin 'sh -c' instead of 'cmd.exe /C' (with evern more
\\\ added) but the results were the same - it hangs as soon as the
restrict.pl script does the system call to the scp -t command.

I'm a bit lost for ideas and way outside the remit of any FAQs I've found.
Does anyone have any suggestions?

Claire 

-- 
Still prettiest by far.

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