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Re: Still testing needed: New passwd/group AD/SAM integration

On 4/16/2014 8:28 AM, Ken Brown wrote:
On 4/16/2014 2:35 AM, Corinna Vinschen wrote:
Hi Ken,

On Apr 16 10:04, Corinna Vinschen wrote:
On Apr 15 14:14, Ken Brown wrote:
I've come across a glitch involving sshd and cygserver.  I normally
have both running, but I've discovered that I have to start sshd
before I start cygserver, or else I have problems (can't ssh from a
non-administrator account to an administrator account).  Here are
the details on 64 bit Cygwin; I haven't tested 32 bit:

I've installed the full 2014-04-12 snapshot and removed /etc/passwd
and /etc/group.  I have an ordinary user kbrown and an administrator
user kbrown-admin.  I now do the following:

1. Start sshd.
2. Start cygserver.
3. Start a Cygwin Terminal as user kbrown.
4. ssh into the kbrown-admin account (with publickey authentication
used by default).

$ ssh kbrown-admin@localhost
Enter passphrase for key '/home/kbrown/.ssh/id_rsa':
setsockopt IPV6_TCLASS 16: Protocol not available:
Last login: Tue Apr 15 13:57:12 2014 from fe80::9956:cbba:6928:151c%11

Everything is fine.

Now I close the Cygwin Terminal, stop both services, and restart
them in the other order (cygserver first, then sshd).  Repeating
steps 3 and 4, I can't login:

$ ssh kbrown-admin@localhost
kbrown-admin@localhost's password:
Permission denied, please try again.
kbrown-admin@localhost's password:

Notice that (a) I didn't get a prompt for the passphrase for my ssh
key, and (b) my password wasn't accepted.

Thanks for the report, Ken.  I'll have a look.

To clarify:  This is a non-domain machine, right?  And sshd is running
under the cyg_server account while cygserver is running under the
LocalSystem account?

Yes to all.

I'm just testing this, only with a domain machine and domain accounts,
and I can't reproduce this.  I have a bit of a problem to test this on a
non-domain machine because my network is set up for domain machines...

However, I found that I made a blatant mistake in cygserver.  The
message length was computed one byte too short, so the trailing \0 in
the passwd/group string wasn't transmitted.  This *might* be the cause
for your problem.

I just built a new snapshot.  Can you please try if this fixes it for
you?  Make sure to use the new cygserver!

Yes, that fixed it.  Thanks.

While I was at it, I also added a patch to get rid of the "setsockopt
IPV6_TCLASS 16: Protocol not available" message.

Good.  It's nice to see that anymore.

Problem reports:
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