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Andrew Dumaresq

2011-Apr-17 00:13 UTC

[Samba] KDC and samba4

Hi,

I'm using  GIT pull from a few days ago.

I am trying to get ssh working with kerberos when samba is the KDC.  I 
am having trouble getting my machine keytabs to work.  Here's some of 
the problems I have:

1)
root at morannon:~# samba-tool export keytab /tmp/test.keytab
added interface ip=192.168.1.11 nmask=255.255.255.0
added interface ip=127.0.0.1 nmask=255.0.0.0
added interface ip=192.168.1.11 nmask=255.255.255.0
added interface ip=127.0.0.1 nmask=255.0.0.0
ldb_wrap open of secrets.ldb
root at morannon:~# klist -k -t /tmp/test.keytab
Keytab name: WRFILE:/tmp/test.keytab
KVNO Timestamp         Principal
---- ----------------- 
--------------------------------------------------------
    1 04/16/11 20:04:19 dumareja at DUMARESQ.LOCAL
    1 04/16/11 20:04:19 dumareja at DUMARESQ.LOCAL
    1 04/16/11 20:04:19 dumareja at DUMARESQ.LOCAL
    2 04/16/11 20:04:19 dumaresq at DUMARESQ.LOCAL
    2 04/16/11 20:04:19 dumaresq at DUMARESQ.LOCAL
    2 04/16/11 20:04:19 dumaresq at DUMARESQ.LOCAL
    1 04/16/11 20:04:19 emma at DUMARESQ.LOCAL
    1 04/16/11 20:04:19 emma at DUMARESQ.LOCAL
    1 04/16/11 20:04:19 emma at DUMARESQ.LOCAL
    1 04/16/11 20:04:19 julia at DUMARESQ.LOCAL
    1 04/16/11 20:04:19 julia at DUMARESQ.LOCAL
    1 04/16/11 20:04:19 julia at DUMARESQ.LOCAL
    1 04/16/11 20:04:19 ANCALAGON$@DUMARESQ.LOCAL
    1 04/16/11 20:04:19 ANCALAGON$@DUMARESQ.LOCAL
    1 04/16/11 20:04:19 ANCALAGON$@DUMARESQ.LOCAL
    3 04/16/11 20:04:19 ARAGORN$@DUMARESQ.LOCAL
    3 04/16/11 20:04:19 ARAGORN$@DUMARESQ.LOCAL
    3 04/16/11 20:04:19 ARAGORN$@DUMARESQ.LOCAL
    4 04/16/11 20:04:19 GANDALF$@DUMARESQ.LOCAL
    4 04/16/11 20:04:19 GANDALF$@DUMARESQ.LOCAL
    4 04/16/11 20:04:19 GANDALF$@DUMARESQ.LOCAL
    3 04/16/11 20:04:19 GOLLUM$@DUMARESQ.LOCAL
    3 04/16/11 20:04:19 GOLLUM$@DUMARESQ.LOCAL
    3 04/16/11 20:04:19 GOLLUM$@DUMARESQ.LOCAL
    3 04/16/11 20:04:19 ARWEN$@DUMARESQ.LOCAL
    3 04/16/11 20:04:19 ARWEN$@DUMARESQ.LOCAL
    3 04/16/11 20:04:19 ARWEN$@DUMARESQ.LOCAL
    4 04/16/11 20:04:19 FRODO$@DUMARESQ.LOCAL
    4 04/16/11 20:04:19 FRODO$@DUMARESQ.LOCAL
    4 04/16/11 20:04:19 FRODO$@DUMARESQ.LOCAL
    1 04/16/11 20:04:19 MORANNON$@DUMARESQ.LOCAL
    1 04/16/11 20:04:19 MORANNON$@DUMARESQ.LOCAL
    1 04/16/11 20:04:19 MORANNON$@DUMARESQ.LOCAL
    1 04/16/11 20:04:19 Administrator at DUMARESQ.LOCAL
    1 04/16/11 20:04:19 Administrator at DUMARESQ.LOCAL
    1 04/16/11 20:04:19 Administrator at DUMARESQ.LOCAL
    1 04/16/11 20:04:19 dns-morannon at DUMARESQ.LOCAL
    1 04/16/11 20:04:19 dns-morannon at DUMARESQ.LOCAL
    1 04/16/11 20:04:19 dns-morannon at DUMARESQ.LOCAL
    1 04/16/11 20:04:19 krbtgt at DUMARESQ.LOCAL
    1 04/16/11 20:04:19 krbtgt at DUMARESQ.LOCAL
    1 04/16/11 20:04:19 krbtgt at DUMARESQ.LOCAL
root at morannon:~# samba-tool machinepw 'MORANNON$@DUMARESQ.LOCAL'
ldb_wrap open of secrets.ldb
ERROR: search returned 0 records, expected 1
root at morannon:~# samba-tool machinepw 'MORANNON$'
ldb_wrap open of secrets.ldb
ERROR: search returned 0 records, expected 1


2)  (This is likely related to my previous problem)
I extracted the host keytab from Samba (using ktpass.sh with no 
password) and put the extract info in /etc/krb5.keytab
  klist -k
Keytab name: WRFILE:/etc/krb5.keytab
KVNO Principal
---- 
--------------------------------------------------------------------------
    1 host/morannon.dumaresq.local at DUMARESQ.LOCAL

but when I try to use that to to run kinit I get this:
  kinit -k
kinit: Client 'host/morannon.dumaresq.local at DUMARESQ.LOCAL' not found
in
Kerberos database while getting initial credentials


I've tried both capital and not capital HOST, I've tried every 
combination of FQDNs and such none of it seems to help.

as a result I can't use ssh to connect using kerberos.

Just make sure I didn't have a DNS issue or something like that I 
shutdown samba and installed a "standard" kdc  I was able to get 
everything working just fine.  This obviously breaks samba quite badly 
and I as far as I can tell samba4 can't use external kerberos.

Any ideas?

Thanks

Matthieu Patou

2011-Apr-17 12:55 UTC

head link

[Samba] KDC and samba4

On 17/04/2011 04:13, Andrew Dumaresq wrote:> Hi,
>
> I'm using  GIT pull from a few days ago.
>
> I am trying to get ssh working with kerberos when samba is the KDC.  I 
> am having trouble getting my machine keytabs to work.  Here's some of 
> the problems I have:
>
> 1)
> root at morannon:~# samba-tool export keytab /tmp/test.keytab
> added interface ip=192.168.1.11 nmask=255.255.255.0
> added interface ip=127.0.0.1 nmask=255.0.0.0
> added interface ip=192.168.1.11 nmask=255.255.255.0
> added interface ip=127.0.0.1 nmask=255.0.0.0
> ldb_wrap open of secrets.ldb
> root at morannon:~# klist -k -t /tmp/test.keytab
> Keytab name: WRFILE:/tmp/test.keytab
> KVNO Timestamp         Principal
> ---- ----------------- 
> --------------------------------------------------------
>    1 04/16/11 20:04:19 dumareja at DUMARESQ.LOCAL
>    1 04/16/11 20:04:19 dumareja at DUMARESQ.LOCAL
>    1 04/16/11 20:04:19 dumareja at DUMARESQ.LOCAL
>    2 04/16/11 20:04:19 dumaresq at DUMARESQ.LOCAL
>    2 04/16/11 20:04:19 dumaresq at DUMARESQ.LOCAL
>    2 04/16/11 20:04:19 dumaresq at DUMARESQ.LOCAL
>    1 04/16/11 20:04:19 emma at DUMARESQ.LOCAL
>    1 04/16/11 20:04:19 emma at DUMARESQ.LOCAL
>    1 04/16/11 20:04:19 emma at DUMARESQ.LOCAL
>    1 04/16/11 20:04:19 julia at DUMARESQ.LOCAL
>    1 04/16/11 20:04:19 julia at DUMARESQ.LOCAL
>    1 04/16/11 20:04:19 julia at DUMARESQ.LOCAL
>    1 04/16/11 20:04:19 ANCALAGON$@DUMARESQ.LOCAL
>    1 04/16/11 20:04:19 ANCALAGON$@DUMARESQ.LOCAL
>    1 04/16/11 20:04:19 ANCALAGON$@DUMARESQ.LOCAL
>    3 04/16/11 20:04:19 ARAGORN$@DUMARESQ.LOCAL
>    3 04/16/11 20:04:19 ARAGORN$@DUMARESQ.LOCAL
>    3 04/16/11 20:04:19 ARAGORN$@DUMARESQ.LOCAL
>    4 04/16/11 20:04:19 GANDALF$@DUMARESQ.LOCAL
>    4 04/16/11 20:04:19 GANDALF$@DUMARESQ.LOCAL
>    4 04/16/11 20:04:19 GANDALF$@DUMARESQ.LOCAL
>    3 04/16/11 20:04:19 GOLLUM$@DUMARESQ.LOCAL
>    3 04/16/11 20:04:19 GOLLUM$@DUMARESQ.LOCAL
>    3 04/16/11 20:04:19 GOLLUM$@DUMARESQ.LOCAL
>    3 04/16/11 20:04:19 ARWEN$@DUMARESQ.LOCAL
>    3 04/16/11 20:04:19 ARWEN$@DUMARESQ.LOCAL
>    3 04/16/11 20:04:19 ARWEN$@DUMARESQ.LOCAL
>    4 04/16/11 20:04:19 FRODO$@DUMARESQ.LOCAL
>    4 04/16/11 20:04:19 FRODO$@DUMARESQ.LOCAL
>    4 04/16/11 20:04:19 FRODO$@DUMARESQ.LOCAL
>    1 04/16/11 20:04:19 MORANNON$@DUMARESQ.LOCAL
>    1 04/16/11 20:04:19 MORANNON$@DUMARESQ.LOCAL
>    1 04/16/11 20:04:19 MORANNON$@DUMARESQ.LOCAL
>    1 04/16/11 20:04:19 Administrator at DUMARESQ.LOCAL
>    1 04/16/11 20:04:19 Administrator at DUMARESQ.LOCAL
>    1 04/16/11 20:04:19 Administrator at DUMARESQ.LOCAL
>    1 04/16/11 20:04:19 dns-morannon at DUMARESQ.LOCAL
>    1 04/16/11 20:04:19 dns-morannon at DUMARESQ.LOCAL
>    1 04/16/11 20:04:19 dns-morannon at DUMARESQ.LOCAL
>    1 04/16/11 20:04:19 krbtgt at DUMARESQ.LOCAL
>    1 04/16/11 20:04:19 krbtgt at DUMARESQ.LOCAL
>    1 04/16/11 20:04:19 krbtgt at DUMARESQ.LOCAL
> root at morannon:~# samba-tool machinepw 'MORANNON$@DUMARESQ.LOCAL'
> ldb_wrap open of secrets.ldb
> ERROR: search returned 0 records, expected 1
> root at morannon:~# samba-tool machinepw 'MORANNON$'
> ldb_wrap open of secrets.ldb
> ERROR: search returned 0 records, expected 1
>There was a bug, the command would only succeed when you are in the path 
where the secrets.ldb file is.
I pushed a fix in autobuild for this, normally it should land in the 
master tree of Samba soon.
>
> 2)  (This is likely related to my previous problem)
> I extracted the host keytab from Samba (using ktpass.sh with no 
> password) and put the extract info in /etc/krb5.keytabStrange, normally you should provide a password or --password
*>  klist -k
> Keytab name: WRFILE:/etc/krb5.keytab
> KVNO Principal
> ---- 
> --------------------------------------------------------------------------
>    1 host/morannon.dumaresq.local at DUMARESQ.LOCAL
>
> but when I try to use that to to run kinit I get this:
>  kinit -k
> kinit: Client 'host/morannon.dumaresq.local at DUMARESQ.LOCAL' not
found
> in Kerberos database while getting initial credentialsNot sure that it's a bug or if it's normal but I noticed that you
can't
get a TGT ticket when you use a keytab with just a servicePrincipalName, 
you should be able thought to get for the SPN in the keytab.

Matthieu.

-- 
Matthieu Patou
Samba Team        http://samba.org
Private repo      http://git.samba.org/?p=mat/samba.git;a=summary

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