[Samba] Combining mod_auth_winbind with other authorization modules

Dave
Tue, 10 Oct 2006 10:39:51 -0000

I'm trying to use the mod_auth_winbind module from lorikeet SVN to
control access to an Apache 2.2.3 server. Samba is 3.0.23b supplied with
Mandriva 2007 and is configured is a member of a w2k3 AD domain. The
Apache users are using IE on W2k or XP domain member clients.

Samba and winbind are working as expected, and if I just use the
mod_auth_winbind module to authenticate the users Apache seems to be OK.
However I also need to use an authorization module to control access to
user groups via the '.htaccess' files. I've tried both
mod_authz_groupfile and mod_authz_dbm; in each case authentication
occasionally falls apart as the following (redacted) Apache error log
segment shows:

  mod_ntlm_winbind.c(1065): doing ntlm auth dance, referer:
http://myserver/homepage/left.html
  mod_ntlm_winbind.c(529): Launched ntlm_helper, pid 28125, referer:
http://myserver/homepage/left.html
  mod_ntlm_winbind.c(699): creating auth user, referer:
http://myserver/homepage/left.html
  mod_ntlm_winbind.c(750): parsing reply from helper to YR Tl...ND\n,
referer: http://myserver/homepage/left.html
  mod_ntlm_winbind.c(788): got response: TT Tl...AA, referer:
http://myserver/homepage/left.html
  mod_ntlm_winbind.c(455): sending back Tl...AA, referer:
http://myserver/homepage/left.html
  mod_ntlm_winbind.c(472): Decrement the connection request count to
keep it alive, referer: http://myserver/homepage/left.html
  mod_ntlm_winbind.c(1065): doing ntlm auth dance, referer:
http://myserver/homepage/left.html
  mod_ntlm_winbind.c(531): Using existing auth helper 28125, referer:
http://myserver/homepage/left.html
  mod_ntlm_winbind.c(750): parsing reply from helper to KK Tl...ND\n,
referer: http://myserver/homepage/left.html
  libsmb/ntlmssp.c:ntlmssp_update(252) got NTLMSSP command 1, expected 3
  mod_ntlm_winbind.c(788): got response: NA NT_STATUS_INVALID_PARAMETER,
referer: http://myserver/homepage/left.html
  mod_ntlm_winbind.c(812): user not authenticated:
NT_STATUS_INVALID_PARAMETER, referer: http://myserver/homepage/left.html
  mod_ntlm_winbind.c(1019): reauth, referer:
http://myserver/homepage/left.html
  mod_ntlm_winbind.c(1065): doing ntlm auth dance, referer:
http://myserver/homepage/left.html
  mod_ntlm_winbind.c(529): Launched ntlm_helper, pid 28126, referer:
http://myserver/homepage/left.html
  mod_ntlm_winbind.c(699): creating auth user, referer:
http://myserver/homepage/left.html
  mod_ntlm_winbind.c(750): parsing reply from helper to YR Tl...9=\n,
referer: http://myserver/homepage/left.html
  libsmb/ntlmssp.c:ntlmssp_update(252) got NTLMSSP command 3, expected 1
  mod_ntlm_winbind.c(788): got response: NA NT_STATUS_INVALID_PARAMETER,
referer: http://myserver/homepage/left.html
  mod_ntlm_winbind.c(812): user not authenticated:
NT_STATUS_INVALID_PARAMETER, referer: http://myserver/homepage/left.html
  mod_ntlm_winbind.c(1065): doing ntlm auth dance, referer:
http://myserver/homepage/left.html
  mod_ntlm_winbind.c(531): Using existing auth helper 28126, referer:
http://myserver/homepage/left.html
  mod_ntlm_winbind.c(750): parsing reply from helper to KK Tl...9=\n,
referer: http://myserver/homepage/left.html
  libsmb/ntlmssp.c:ntlmssp_update(252) got NTLMSSP command 3, expected 1
  mod_ntlm_winbind.c(788): got response: NA NT_STATUS_INVALID_PARAMETER,
referer: http://myserver/homepage/left.html
  mod_ntlm_winbind.c(812): user not authenticated:
NT_STATUS_INVALID_PARAMETER, referer: http://myserver/homepage/left.html
  [notice] child pid 28108 exit signal Segmentation fault (11)

It seems that the browser opens two sessions with the server and the
auth mechanism gets mixed up between the two. The browser displays a
mixture of HTTP headers and the usual Apache 401 message.

Does mod_auth_winbind have any known problems combining in this way?
--
Dave

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