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Date:	Wed, 13 Feb 2019 18:55:41 +0100
From:	Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To:	cygwin AT cygwin DOT com
Subject:	Re: sshd: computer name's case must match?
Message-ID:	<20190213175541.GE3718@calimero.vinschen.de>
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On Feb 13 10:43, Bill Stewart wrote:
> On Wed, Feb 13, 2019 at 9:26 AM Corinna Vinschen
> <corinna-cygwin AT cygwin DOT com> wrote:
> > No, that was a bug.  With case insenitive usernames, the pattern
> > matching in OpenSSH won't work and you create a potential security
> > problem.
>=20
> I see - interoperability issue.
>=20
> Therefore it becomes imperative on the Windows side to match username
> case exactly and we need to explain this.
>=20
> However I would say that the case of the domain or computername
> shouldn't matter?
>=20
> I just tested with cygwin1.dll (13 Feb 2019) and this worked:
>=20
> ssh COMPUTERNAME+username AT computername
>=20
> however this didn't work:
>=20
> ssh computername+username AT computername
>=20
> Am I not understanding something?

The complete string "domain+samaccountname" is the Cygwin username,
see the output of `getent passwd <user>' The entire Cygwin username
should always use the same case, otherwise case sensitive pattern
matching on the name returned in the passwd name field won't work.

Play with `getent passwd' with the latest and the previous Cygwin
DLL.  That should give you an idea.


Corinna

--=20
Corinna Vinschen
Cygwin Maintainer

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