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Date: Mon, 18 Nov 2013 08:58:53 +0100
From: Andrea Venturoli <ml AT netfence DOT it>
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To: Cygwin Mailing List <cygwin AT cygwin DOT com>
Subject: Sshd and key based authentication
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Hello.

I'm trying to set up sshd on a Windows 2003 domain controller.
Everything works with password authentication; however I need this for a 
script, so, in order to get non-interactive login, I must use keys.
Tried as hard as I could, but I could not achieve this: I'm always asked 
for a password.


I read several posts which say I need to use local accounts, not domain 
accounts; however, the machine being a DC, I don't have Local security 
policy or Local users in Control panel or Administrative tool.

So, this is the fragment from my /etc/passwd:
> sshd:unused:2259:513:sshd privsep,U-MYDOMAIN\sshd,S-X-X-XX-XXXXXXXXXX-XXXXXXXXXX-XXXXXXXXXX-XXXX:/var/empty:/bin/false
> cyg_server:unused:2265:513:cyg_server,U-MYDOMAIN\cyg_server,S-X-X-XX-XXXXXXXXXX-XXXXXXXXXX-XXXXXXXXXXX-XXXX:/home/cyg_server:/bin/bash

"ssh -vvv" suggest the key is presented to the server, but key 
authentication does not succeed anyway. Nothing special is logged 
server-side and ssh moves on to password authentiation.


On with the questions...

Is this supposed to work? Several posts say so, but no one mentions a 
domain controller... Does it bring in anything special?

Are the above users correct? Any problem with it?

What are correct ownership and permissions of /home, /home/myuser, 
/home/myuser/.ssh and /home/myuser/.ssh/authorized_keys?

According to some how-tos, ssh-host-confing should have prompted with 
"CYGWIN=" and I should have replied "tty ntsec", but this did not 
happen. Other how-tos suggest putting this variable in the environment.
Is this information current or obsolete? I tried and it didn't seem to 
matter...


Any other hint?

  bye & Thanks
	av.

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