Home » Mailing list archives » freebsd-current » 2009 » March » 16

Re: problem with nss_ldap

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[view original message]
From: Hartmut.Brandt
Subject: problem with nss_ldap
Date: Sunday, January 18, 2009 - 12:39 pm

Hi,

for a year or so I had nss_ldap connected to an active directory (with openldap23-sasl-client) on a year-old current. Yesterday I've rebuilt everything and I started to get 'undefined symbols' (for example gss_equal_oid) when running any program needing pw or group entries. After some poking around I fixed these by adding -lgssapi to the Makefiles for libgssapi_krb5.so and libgssap_spnego.so. Now getent, local login and everything works fine, except cron and sshd.

Both create entries in /var/log/messages like: 

Jan 18 20:00:02 knopdnsimu13f cron[1495]: GSSAPI Error:  Miscellaneous failure (see text)¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ
Jan 18 20:00:02 knopdnsimu13f kernel: ZZZZZZZZZZZZZZZZ

I've tried to figure out in which of the dozens of layered libraries (gss, sasl, ssl, ......) this error is generated but did not find anything.

This is on amd64, krb5 enabled in pam, gssapi disabled in sshd_config (as I said, this worked before).

Any ideas?
harti
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[view original message]
From: Harti Brandt
Subject: Re: problem with nss_ldap
Date: Friday, January 23, 2009 - 11:02 am

So to answer my own mail: I made a link from the kerberos ticket file 
which contains the host ticket (and is specified in nss_ldap.conf) to 
/tmp/krb5cc_0. I've no idea why this is suddenly necessary, though.

>
[ message continues ]
[view original message]
From: Tom McLaughlin
Subject: Re: problem with nss_ldap
Date: Thursday, February 26, 2009 - 6:39 am

Hi Harti, I'm setting up a -CURRENT vm right now with nss_ldap and have 
an LDAP server which requires SASL.  I use a global krb5 credentials 
cache for nss_ldap as it appears you do.  Last time I did this was right 
around the time the latest heimdal was imported.  My setup worked before 
the import and broke afterwards.  As I recall from talking to dfr@ (?) 
libgssapi_{krb5,spnego} are just plugins for libgssapi.  They should not 
need to be linked against libgssapi and other things should not link 
against them.  I would like to see this fixed as libgssapi is intended 
to be used.  I just want to know what the proper fix is.

(Hey, just found the old conversation with dfr@ in my inbox but need to 

There may be an issue with the env method used in nss_ldap to change the 
credentials cache.  My mind is fuzzy but I do recall a similar issue but 
don't remember the exact cause or case.  nss_ldap has a second 
configurable ccname method which when I submitted the original patch I 
intended to switch to once we had a newer heimdal.  Once I get nss_ldap 
working on my box I intend to submit another patch.

tom
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| tmclaugh at sdf.lonestar.org                 tmclaugh at FreeBSD.org |
| FreeBSD                                       http://www.FreeBSD.org |

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[view original message]
From: Tom McLaughlin
Subject: Re: problem with nss_ldap
Date: Saturday, February 28, 2009 - 11:15 am

Hi Harti (CC maintainer),

Can you try the attached patch for nss_ldap?  This should cause the host 
ticket to work correctly on -CURRENT.  It's "my box approved".

tom

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| tmclaugh at sdf.lonestar.org                 tmclaugh at FreeBSD.org |
| FreeBSD                                       http://www.FreeBSD.org |


[ message continues ]
[view original message]
From: Hartmut Brandt
Subject: Re: problem with nss_ldap
Date: Friday, March 6, 2009 - 1:39 pm

Hi Tom,

On Sat, 28 Feb 2009, Tom McLaughlin wrote:

TM>Tom McLaughlin wrote:
TM>> Harti Brandt wrote:
TM>> > On Sun, 18 Jan 2009, Hartmut.Brandt@dlr.de wrote:
TM>
TM>> > > Both create entries in /var/log/messages like:
TM>> > > 
TM>> > > Jan 18 20:00:02 knopdnsimu13f cron[1495]: GSSAPI Error:  Miscellaneous
TM>> > > failure (see
TM>> > > text)???????????????ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ
TM>Z
TM>> Z
TM>> >  ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ
TM>> > > Jan 18 20:00:02 knopdnsimu13f kernel: ZZZZZZZZZZZZZZZZ
TM>> > > 
TM>> > > I've tried to figure out in which of the dozens of layered libraries
TM>> > > (gss, sasl, ssl, ......) this error is generated but did not find
TM>> > > anything.
TM>> > > 
TM>> > > This is on amd64, krb5 enabled in pam, gssapi disabled in sshd_config
TM>> > > (as I said, this worked before).
TM>> > So to answer my own mail: I made a link from the kerberos ticket file
TM>> > which contains the host ticket (and is specified in nss_ldap.conf) to
TM>> > /tmp/krb5cc_0. I've no idea why this is suddenly necessary, though.
TM>> 
TM>> There may be an issue with the env method used in nss_ldap to change the
TM>> ...
[ message continues ]
[view original message]
From: Kostik Belousov
Subject: Re: problem with nss_ldap
Date: Friday, March 6, 2009 - 2:16 pm

ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ=
ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ=
ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ=
ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ=
ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ=
ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ=
ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ=
ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ=
ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ=
ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ=
ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ=

It seems that this is because libgssapi_krb5, libgssapi_spnego
and several other heimdal shared libraries are not linked against libgssapi.


[ message continues ]
[view original message]
From: tmclaugh
Subject: Re: problem with nss_ldap
Date: Friday, March 6, 2009 - 3:00 pm

As I understand it libgssapi_krb5 and libgssapi_spnego are not supposed to
be linked against libgssapi.  They're supposed to be just plugins.

tom

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[view original message]
From: Kostik Belousov
Subject: Re: problem with nss_ldap
Date: Friday, March 6, 2009 - 3:24 pm

ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ=
ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ=
ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ=
ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ=
ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ=
ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ=
ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ=
ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ=
ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ=
ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ=
ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ=

These objects reference symbols from libgssapi. The libgssapi or nss_ldap
are dlopened without RTLD_GLOBAL flag, and libgssapi-provided symbols
are not available. As I understand, nss module must be not loaded with
RTLD_GLOBAL.

Our binutils in base are old. Newer ld has a switch --no-allow-shlib-undefi=
ned
that fails the link if shared library has undefined references. I find
it useful to catch and fix this kind of errors.

[ message continues ]
[view original message]
From: Doug Rabson
Subject: Re: problem with nss_ldap
Date: Tuesday, March 10, 2009 - 3:38 am

The real problem is that nss_ldap should not link with libgssapi_krb5  
directly. This library is a plugin for the mechanism-independant  
libgssapi and can not be used standalone. The nss_ldap module should  
link to libgssapi and that will handle loading libgssapi_krb5 as  
necessary.


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[view original message]
From: Kostik Belousov
Subject: Re: problem with nss_ldap
Date: Tuesday, March 10, 2009 - 4:41 am

ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ=
ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ=
ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ=
ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ=
ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ=
ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ=
ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ=
ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ=
ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ=
ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ=
I think this is a different problem, and it does not invalidates the
requirement for each dso to be linked against all required dso's that
provide symbols referenced by the first one.

[ message continues ]
[view original message]
From: Doug Rabson
Subject: Re: problem with nss_ldap
Date: Tuesday, March 10, 2009 - 5:52 am

Perhaps I should have put GSS-API extensions in a different library  
from the mechanism implementation. This is actually quite possible  
since all the krb5 extensions are wrappers on a more generic GSS-API  
extension api. Its probably too hard to do that now.

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[view original message]
From: Tom McLaughlin
Subject: Re: problem with nss_ldap
Date: Tuesday, March 10, 2009 - 9:58 am

Okay, attached is a patch to nss_ldap.  On -CURRENT I have changed the 
CONFIGURE_ARG to use "--enable-configurable-krb5-ccname-gssapi" instead 
of "--enable-configurable-krb5-ccname-env" which fixes Harti's initial 
problem with apps like cron failing.  It will also make nss_ldap link 
against libgssapi and libgssapi_krb5.  I still have one lingering issue 
though at least things work.

[tom@freebsd-8-amd64 tom]$ getent passwd tom
dlopen: /usr/lib/libgssapi_spnego.so.10: Undefined symbol 
"GSS_C_NT_HOSTBASED_SERVICE"
tom:x:10001:10001:Tom McLaughlin:/home/tom:/bin/sh

I am also curious how gssapi in -CURRENT is affecting the ports tree. 
Are other ports experiencing similar linking issues?  How can I go about 
finding and fixing them?

tom

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| FreeBSD                                       http://www.FreeBSD.org |


[ message continues ]
[view original message]
From: Hartmut Brandt
Subject: Re: problem with nss_ldap
Date: Thursday, March 12, 2009 - 1:31 am

On Tue, 10 Mar 2009, Tom McLaughlin wrote:

TM>Doug Rabson wrote:

[snip alot]

TM>Okay, attached is a patch to nss_ldap.  On -CURRENT I have changed the 
TM>CONFIGURE_ARG to use "--enable-configurable-krb5-ccname-gssapi" instead 
TM>of "--enable-configurable-krb5-ccname-env" which fixes Harti's initial 
TM>problem with apps like cron failing.  It will also make nss_ldap link 
TM>against libgssapi and libgssapi_krb5.  I still have one lingering issue 
TM>though at least things work.
TM>
TM>[tom@freebsd-8-amd64 tom]$ getent passwd tom
TM>dlopen: /usr/lib/libgssapi_spnego.so.10: Undefined symbol 
TM>"GSS_C_NT_HOSTBASED_SERVICE"
TM>tom:x:10001:10001:Tom McLaughlin:/home/tom:/bin/sh

Ok. This works so far. I get the same error. But I have the original problem
again - cron, sendmail and sshd seem not to use the hostcreds. I still need a
link from /var/tmp/hostcreds to /tmp/krb5cc_0 to make sshd to work. The build
of nss_ldap seems to find all the necessary files: sasl.h, gssapi.h,
gssapi_krb5.h.

The thing I cannot understand is: why do normal applications find the hostcreds,
but the daemons not? What do they differently?

harti
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From: Tom McLaughlin
Subject: Re: problem with nss_ldap
Date: Sunday, March 15, 2009 - 4:07 pm

What's the machine's OSVERSION?  I used the OSVERSION on my box when 
checking which method to use for setting the credentials cache.  I 
didn't feel like trying to figure out what the OSVERSION was when 
Heimdal was updated.



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[view original message]
From: Hartmut Brandt
Subject: Re: problem with nss_ldap
Date: Monday, March 16, 2009 - 1:56 am

On Sun, 15 Mar 2009, Tom McLaughlin wrote:

TM>Hartmut Brandt wrote:
TM>> On Tue, 10 Mar 2009, Tom McLaughlin wrote:
TM>> 
TM>> TM>Doug Rabson wrote:
TM>> 
TM>> [snip alot]
TM>> 
TM>> TM>Okay, attached is a patch to nss_ldap.  On -CURRENT I have changed the
TM>> TM>CONFIGURE_ARG to use "--enable-configurable-krb5-ccname-gssapi" instead
TM>> TM>of "--enable-configurable-krb5-ccname-env" which fixes Harti's initial
TM>> TM>problem with apps like cron failing.  It will also make nss_ldap link
TM>> TM>against libgssapi and libgssapi_krb5.  I still have one lingering issue
TM>> TM>though at least things work.
TM>> TM>
TM>> TM>[tom@freebsd-8-amd64 tom]$ getent passwd tom
TM>> TM>dlopen: /usr/lib/libgssapi_spnego.so.10: Undefined symbol
TM>> TM>"GSS_C_NT_HOSTBASED_SERVICE"
TM>> TM>tom:x:10001:10001:Tom McLaughlin:/home/tom:/bin/sh
TM>> 
TM>> Ok. This works so far. I get the same error. But I have the original
TM>> problem
TM>> again - cron, sendmail and sshd seem not to use the hostcreds. I still need
TM>> a
TM>> link from /var/tmp/hostcreds to /tmp/krb5cc_0 to make sshd to work. The
TM>> build
TM>> of nss_ldap seems to find all the necessary files: sasl.h, gssapi.h,
TM>> gssapi_krb5.h.
TM>> 
TM>
TM>What's the machine's OSVERSION?  I used the OSVERSION on my box when checking
TM>which method to use for setting the credentials cache.  I didn't feel like
TM>trying to figure out what the OSVERSION was when Heimdal was updated.

Looks like the Makefile checks for >= 800064. My sys/param.h has 800061.

Unfortunately I'm out of town until at least sunday so I can do more tests 
only next week.

harti

TM>
TM>tom
TM>
TM>> The thing I cannot understand is: why do normal applications find the
TM>> hostcreds,
TM>> but the daemons not? What do they differently?
TM>> 
TM>> harti
TM>
TM>
TM>
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[view original message]
From: Harti Brandt
Subject: Re: problem with nss_ldap
Date: Monday, March 16, 2009 - 4:04 am

On Mon, 16 Mar 2009, Hartmut Brandt wrote:

HB>On Sun, 15 Mar 2009, Tom McLaughlin wrote:
HB>
HB>TM>Hartmut Brandt wrote:
HB>TM>> On Tue, 10 Mar 2009, Tom McLaughlin wrote:
HB>TM>> 
HB>TM>> TM>Doug Rabson wrote:
HB>TM>> 
HB>TM>> [snip alot]
HB>TM>> 
HB>TM>> TM>Okay, attached is a patch to nss_ldap.  On -CURRENT I have changed the
HB>TM>> TM>CONFIGURE_ARG to use "--enable-configurable-krb5-ccname-gssapi" instead
HB>TM>> TM>of "--enable-configurable-krb5-ccname-env" which fixes Harti's initial
HB>TM>> TM>problem with apps like cron failing.  It will also make nss_ldap link
HB>TM>> TM>against libgssapi and libgssapi_krb5.  I still have one lingering issue
HB>TM>> TM>though at least things work.
HB>TM>> TM>
HB>TM>> TM>[tom@freebsd-8-amd64 tom]$ getent passwd tom
HB>TM>> TM>dlopen: /usr/lib/libgssapi_spnego.so.10: Undefined symbol
HB>TM>> TM>"GSS_C_NT_HOSTBASED_SERVICE"
HB>TM>> TM>tom:x:10001:10001:Tom McLaughlin:/home/tom:/bin/sh
HB>TM>> 
HB>TM>> Ok. This works so far. I get the same error. But I have the original
HB>TM>> problem
HB>TM>> again - cron, sendmail and sshd seem not to use the hostcreds. I still need
HB>TM>> a
HB>TM>> link from /var/tmp/hostcreds to /tmp/krb5cc_0 to make sshd to work. The
HB>TM>> build
HB>TM>> of nss_ldap seems to find all the necessary files: sasl.h, gssapi.h,
HB>TM>> gssapi_krb5.h.
HB>TM>> 
HB>TM>
HB>TM>What's the machine's OSVERSION?  I used the OSVERSION on my box when checking
HB>TM>which method to use for setting the credentials cache.  I didn't feel like
HB>TM>trying to figure out what the OSVERSION was when Heimdal was updated.
HB>
HB>Looks like the Makefile checks for >= 800064. My sys/param.h has 800061.
HB>
HB>Unfortunately I'm out of town until at least sunday so I can do more tests 
HB>only next week.

To reply to my own mail: changing the check in the Makefile to >= 800061 
makes things working. The only remaining thing is the missing symbol in ...
[ message continues ]
[view original message]
From: O. Hartmann
Subject: Re: problem with nss_ldap
Date: Monday, March 16, 2009 - 4:10 am

Today I found this posting here having much trouble with authetication 
on some clients.

After an update of the LDAP server from OpenLDAP 2.4.14 to 2.4.15 and 
updating db-4.6 to db-4.7 (all on the server, server runs FreeBSD 
7.1-STABLE/i386), I have no luck log in via ssh on any client (client 
runs FreeBSD 8.0-CURRENT/amd64). Client has also db-4.7 and OpenLDAP 
2.4.15 and I recompiled pam_ldap and nss_ldap when updated OpenLDAP 
2.4.14 to OpenLDAP 2.4.15.

Checking console log gives me this:

Mar 16 11:04:34 thusnelda sshd[1560]: fatal: login_get_lastlog: Cannot 
find account for uid 1000
Mar 16 11:04:34 thusnelda sshd[1560]: syslogin_perform_logout: logout() 
returned an error


Checking sshd.log gives this:Mar 16 11:04:19 thusnelda sshd[1560]: 
Accepted keyboard-interactive/pam for user from XXX.XXX.XXX.XXX port 
61861 ssh2
Mar 16 11:04:19 thusnelda sshd[1563]: nss_ldap: could not get LDAP 
result - Can't contact LDAP server
Mar 16 11:04:34 thusnelda sshd[1563]: nss_ldap: could not get LDAP 
result - Timed out
Mar 16 11:04:34 thusnelda sshd[1560]: nss_ldap: could not search LDAP 
server - Server is unavailable
Mar 16 11:04:34 thusnelda sshd[1560]: fatal: login_get_lastlog: Cannot 
find account for uid 1000
Mar 16 11:04:34 thusnelda sshd[1560]: syslogin_perform_logout: logout() 
returned an error

This happens now on all boxes running the most recent OpenLDAP 2.4.15.

is there a serious issue we should PR?

Thanks in advance,
Oliver
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From: tmclaugh
Subject: Re: problem with nss_ldap
Date: Monday, March 16, 2009 - 7:13 am

Need a lot more info here.  The issue in this thread has been related to
GSSAPI and nss_ldap and manifests itself when you use krb5_ccname in the
nss_ldap.conf.  Is the problem only related to authentication?  Only sshd?
 If you're on the box does nss_ldap work fine and enumerate all users and
groups just fine?  Are only -CURRENT boxes showing problems?  What about
-STABLE?  When did everything break?  What do the ldap server logs say if
you have access to them?  (Might want to bump up the loglevel on openldap
too.)

tom

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From: Tom McLaughlin
Subject: Re: problem with nss_ldap
Date: Sunday, April 5, 2009 - 2:41 pm

Hey, just curious if there's anything that can be done about the one 
lingering issue I have above with:

dlopen: /usr/lib/libgssapi_spnego.so.10: Undefined symbol 
"GSS_C_NT_HOSTBASED_SERVICE"

Got back from vacation and happen to go through my -CURRENT box's 
mailbox and cron has flooded my inbox with emails because of this. 
Would be nice to make this go away. :)

tom

-- 
| tmclaugh at sdf.lonestar.org                 tmclaugh at FreeBSD.org |
| FreeBSD                                       http://www.FreeBSD.org |

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From: Hartmut Brandt
Subject: Re: problem with nss_ldap
Date: Monday, April 6, 2009 - 12:54 am

Yes. I get this on every 'ls -l' and on 'vi' which is kind of annoying. 
But I have not enough GSSAPI-foo...

harti

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From: Hartmut Brandt
Subject: Re: problem with nss_ldap
Date: Tuesday, March 10, 2009 - 5:39 am

On Tue, 10 Mar 2009, Doug Rabson wrote:

DR>
DR>On 6 Mar 2009, at 22:24, Kostik Belousov wrote:
DR>
DR>> On Fri, Mar 06, 2009 at 05:00:49PM -0500, tmclaugh@sdf.lonestar.org wrote:
DR>> > > On Fri, Mar 06, 2009 at 09:39:31PM +0100, Hartmut Brandt wrote:
DR>> > > > 
DR>> > > > Hi Tom,
DR>> > > > 
DR>> > > > On Sat, 28 Feb 2009, Tom McLaughlin wrote:
DR>> > > > 
DR>> > > > TM>Tom McLaughlin wrote:
DR>> > > > TM>> Harti Brandt wrote:
DR>> > > > TM>> > On Sun, 18 Jan 2009, Hartmut.Brandt@dlr.de wrote:
DR>> > > > TM>
DR>> > > > TM>> > > Both create entries in /var/log/messages like:
DR>> > > > TM>> > >
DR>> > > > TM>> > > Jan 18 20:00:02 knopdnsimu13f cron[1495]: GSSAPI Error:
DR>> > > > Miscellaneous
DR>> > > > TM>> > > failure (see
DR>> > > > TM>> > >
DR>> > > > text)???????????????ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ
DR>> > > > TM>Z
DR>> > > > TM>> Z
DR>> > > > TM>> >  ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ
DR>> > > > TM>> > > Jan 18 20:00:02 knopdnsimu13f kernel: ZZZZZZZZZZZZZZZZ
DR>> > > > TM>> > >
DR>> > > > TM>> > > I've tried to figure out in which of the dozens of layered
DR>> > > > libraries
DR>> > > > TM>> > > (gss, sasl, ssl, ......) ...
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From: Doug Rabson
Subject: Re: problem with nss_ldap
Date: Tuesday, March 10, 2009 - 5:47 am

Possibly. This library does export symbols for kerberos-specific GSS- 
API extensions but if you use them you still need to link with  
libgssapi as well.

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From: tmclaugh
Subject: Re: problem with nss_ldap
Date: Friday, March 6, 2009 - 2:33 pm

Sorry, forgot to mention you still need that patch to libgssapi and
libgssapi_krb5 in base that you did previously.  The patch to nss_ldap
alleviates the lingering problems you still saw.  I need to eventually
talk to dfr@ (been busy with various projects at home lately) and see how
nss_ldap should properly link against libgssapi but even after that the
patch to nss_ldap will still be needed and better than the current method
used to use a host ticket.

tom


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From: Hartmut Brandt
Subject: Re: problem with nss_ldap
Date: Saturday, March 7, 2009 - 1:53 pm

How will gss allow you to go without a host ticket? Somehow the host 
needs to bind to the AD, right?

In any case I rebuilt the two libraries linking them agains libgssapi 
and I can at least log in again. Sendmail dies with signal 11 and after 
I removed the link from /tmp/krb5cc_0 to the host creds cron also dies 
with signal 11. This is somewhat hard to debug, because it doesn't dump 
core.

Sudo does not work and gives:

Mar  7 21:23:57 knopdnsimu13f sudo: GSSAPI Error:  Miscellaneous failure 
(see text) (unknown mech-code 2529638944 for mech unknown)
Mar  7 21:23:57 knopdnsimu13f sudo: GSSAPI Error:  Miscellaneous failure 
(see text)¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥ (Ticket expired¥¥libdefaults)
Mar  7 21:24:27 knopdnsimu13f last message repeated 8 times
Mar  7 21:24:32 knopdnsimu13f sshd[50888]: error: PAM: authentication 
error for root from XXXX.dlr.de
Mar  7 21:25:00 knopdnsimu13f sudo: GSSAPI Error:  Miscellaneous failure 
(see text)¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥ (Ticket expired¥¥libdefaults)
Mar  7 21:25:00 knopdnsimu13f sudo: GSSAPI Error:  Miscellaneous failure 
(see text)¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥ (Ticket expired¥¥libdefaults)
Mar  7 21:26:05 knopdnsimu13f last message repeated 2 times
Mar  7 21:26:05 knopdnsimu13f sudo: nss_ldap: could not search LDAP 
server - Server is unavailable

The host ticket is fine (I checked) and the server is, of course, 
reachable and up. None of the tickets is expired.

I must admit that I'm lost in this twisted maze of libraries: gss, 
nss_ldap, sasl. I can't even grasp how they layer on each other. But if 
you come up with patches I'm ready to try them.

Did I forget to mention that this worked fine for one or two years until 
I decided to update my system (this was when I sent the original mail)?

harti

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From: Tom McLaughlin
Subject: Re: problem with nss_ldap
Date: Saturday, March 7, 2009 - 2:18 pm

Yes, you still need a host ticket on the box.  For nss_ldap to work 
correctly right now using a host ticket on -CURRENT you need 
libgssapi_{krb5,spnego} linked against libgssapi and the patch to the 
nss_ldap port.  nss_ldap has two different methods that it can use to 
use a host ticket and the one used is determined during the configure 
stage of the port.  The port currently uses a host ticket by temporarily 
changing the path to the user's ticket in the user's environment to the 
path to the host ticket when it needs to do a lookup.  The patch to 
nss_ldap I sent uses the gss_krb5_ccache_name() function instead on 

Yes, sudo, sendmail, cron, and a few others will exhibit this behavior 

Yup, this started when heimdal and gssapi were updated from the ancient 
versions we used to have.

tom

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