topic Re: SFTP batch file problems in Operating System - OpenVMS

SFTP batch file problems

robert70 — Wed, 26 Aug 2009 09:53:32 GMT

Trying to SFTP2 using this command

sftp2 "-B"zxc.ftp egduser@128.8.204.122

zxc.ftp contains one line
'password'

Manually this works fine eg

sftp2 egduser@128.8.204.122
type in the password and you are logged in
batch gives this error.......

DAVE$ sftp2 "-B"zxc.ftp egduser@128.8.204.122

FATAL: ssh2 client failed to authenticate. (or you have too old ssh2 installed, check with ssh2 "-V")

warning: Authentication failed.
Disconnected; no more authentication methods available (No further authenticatio
n methods available.).

%TCPIP-F-SSH_FATAL, non-specific fatal error condition
DAVE$

SSH2 "-V" gives

dave$dkb0:[sys0.syscommon.][sysexe]tcpip$ssh_ssh2.exe: SSH Secure Shell OpenVMS
(V5.5) 3.2.0 on COMPAQ AlphaServer DS20E 666 MHz - VMS V7.3-2

any help please
thanks robert

Re: SFTP batch file problems

Martin Vorlaender — Wed, 26 Aug 2009 10:10:46 GMT

Robert,

password entry only works interactively.

To use SSH/SCP/SFTP in batch, you have to establish an authentication without password, e.g. using public/private keys.

HTH,
Martin

Re: SFTP batch file problems

robert70 — Wed, 26 Aug 2009 10:24:53 GMT

Thanks Martin,
Total Novice at all of this
How would I go about such a setup?

Re: SFTP batch file problems

Martin Vorlaender — Wed, 26 Aug 2009 11:01:40 GMT

Robert,

setting up public/private key authorization is described for HP TCP/IP services at http://h71000.www7.hp.com/doc/732final/aa-rvbua-te/00/00/24-con.html under "Customizing Public-Key Authentication". For OpenSSH (the variant used by various Unixes) see http://sial.org/howto/openssh/publickey-auth/

To use the ssh_keygen tool (note the underscore instead of the hyphen used in Unix), you'll have to define some foreign commands using

$ @SYS$MANAGER:TCPIP$DEFINE_COMMANDS.COM

Another complication stems from the fact that VMS SSH is NOT derived from OpenSSH, but instead is a port of the commercial implementation. The two products use a different file format to store keys. Unfortunately, the VMS ssh_keygen tool lacks the ability to convert the public key to OpenSSH format (should your Non-VMS server use that), so you'll have to do that on the server, using

# ssh-keygen -i -f vms-format-key > openssh-format-key

HTH,
Martin

Re: SFTP batch file problems

Hoff — Wed, 26 Aug 2009 13:20:24 GMT

Here's the basic sequence for no-password login for a Unix box accessing an OpenVMS box via ssh:

http://labs.hoffmanlabs.com/node/1118

For your specific purposes here, the ssh manual is what you want to read.

Re: SFTP batch file problems

robert70 — Tue, 10 Nov 2009 15:44:30 GMT

thanks