From owner-freebsd-current@FreeBSD.ORG Tue Mar 10 10:38:53 2009 Return-Path: Delivered-To: current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id B07871065675 for ; Tue, 10 Mar 2009 10:38:53 +0000 (UTC) (envelope-from dfr@rabson.org) Received: from itchy.rabson.org (unknown [IPv6:2002:50b1:e8f2:1::143]) by mx1.freebsd.org (Postfix) with ESMTP id 427AC8FC1A for ; Tue, 10 Mar 2009 10:38:53 +0000 (UTC) (envelope-from dfr@rabson.org) Received: from [IPv6:2001:470:909f:1:21b:63ff:feb8:5abc] (unknown [IPv6:2001:470:909f:1:21b:63ff:feb8:5abc]) by itchy.rabson.org (Postfix) with ESMTP id 0F0C73FB8; Tue, 10 Mar 2009 10:37:34 +0000 (GMT) Message-Id: From: Doug Rabson To: Kostik Belousov In-Reply-To: <20090306222433.GF41617@deviant.kiev.zoral.com.ua> Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes Content-Transfer-Encoding: 7bit Mime-Version: 1.0 (Apple Message framework v930.3) Date: Tue, 10 Mar 2009 10:38:51 +0000 References: <49A69B74.1080201@sdf.lonestar.org> <49A97F2E.3030005@sdf.lonestar.org> <20090306213531.G60465@beagle.kn.op.dlr.de> <20090306211650.GD41617@deviant.kiev.zoral.com.ua> <20090306222433.GF41617@deviant.kiev.zoral.com.ua> X-Mailer: Apple Mail (2.930.3) Cc: tmclaugh@sdf.lonestar.org, Hartmut Brandt , kazakov@gmail.com, current@freebsd.org Subject: Re: problem with nss_ldap X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 10 Mar 2009 10:38:54 -0000 On 6 Mar 2009, at 22:24, Kostik Belousov wrote: > On Fri, Mar 06, 2009 at 05:00:49PM -0500, tmclaugh@sdf.lonestar.org > wrote: >>> On Fri, Mar 06, 2009 at 09:39:31PM +0100, Hartmut Brandt wrote: >>>> >>>> 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>> credentials cache. My mind is fuzzy but I do recall a similar >>>> issue but >>>> TM>> don't remember the exact cause or case. nss_ldap has a second >>>> configurable >>>> TM>> ccname method which when I submitted the original patch I >>>> intended >>>> to >>>> TM>> switch to once we had a newer heimdal. Once I get nss_ldap >>>> working >>>> on my >>>> TM>> box I intend to submit another patch. >>>> TM>> >>>> TM>> tom >>>> TM> >>>> TM>Hi Harti (CC maintainer), >>>> TM> >>>> TM>Can you try the attached patch for nss_ldap? This should >>>> cause the >>>> host >>>> TM>ticket to work correctly on -CURRENT. It's "my box approved". >>>> >>>> Does not work. I rebuilt my system with today's sources to be sure, >>>> removed my patches to the two library makefiles and rebuilt >>>> nss_ldap >>>> with >>>> your patch. I get: >>>> >>>> # ls -l >>>> dlopen: /usr/lib/libgssapi_spnego.so.10: Undefined symbol >>>> "GSS_C_NT_HOSTBASED_SERVICE" >>>> /libexec/ld-elf.so.1: /usr/lib/libgssapi_krb5.so.10: Undefined >>>> symbol >>>> "gss_oid_equal" >>>> >>>> Basically on everything I enter. Luckily vi still works :-) >>>> >>>> I saw that the configuration script claims not to find >>>> gss_krb5_ccache_name in -lgssapi or -lgssapi_krb5. This is >>>> because the >>>> test program for -lgssapi_krb5 links only to gssapi_krb5 but not to >>>> gssapi >>>> and so gets a lot of errors. I fixed this by adding gssapi, but the >>>> final >>>> result was the same. >>> >>> It seems that this is because libgssapi_krb5, libgssapi_spnego >>> and several other heimdal shared libraries are not linked against >>> libgssapi. >>> >>> >> >> As I understand it libgssapi_krb5 and libgssapi_spnego are not >> supposed to >> be linked against libgssapi. They're supposed to be just plugins. > > 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- > undefined > that fails the link if shared library has undefined references. I find > it useful to catch and fix this kind of errors. 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.