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when verifying a ticket from winbindd_pam.c.
I've found during multiple, fast, automated SSH logins (such
as from a cron script) that the replay cache in MIT's krb5
lib will occasionally fail the krb5_rd_req() as a replay attack.
There seems to be a small window during which the MIT krb5
libs could reproduce identical time stamps for ctime and cusec
in the authenticator since Unix systems only give back
milli-seconds rather than the micro-seconds needed by the
authenticator. Checked against MIT 1.5.1. Have not
researched how Heimdal does it.
My thinking is that if someone can spoof the KDC and TDS
services we are pretty hopeless anyways.
(This used to be commit cbd33da9f7)
winbind. With this and W2k3 DCs around it is possible to use
more than one winbind on the same machine account, because
NetSamLogonEx does not use the credentials chain.
I added the flag domain->can_do_samlogon_ex because this
only works against W2k3 and with schannel. The theory is to
try if we're AD and have schannel, and fall back to
NetSamLogon if this fails. can_do_samlogon_ex is thus a
protection against multiple failures.
Only checking into 3_0, this needs more review before going
into a production release.
Feel free to comment :-)
(This used to be commit f5d525399b)
settings from one trusted domain with no incoming trust path.
Guenther, I think this is ok as we only need the pw policy
to give feedback on upcoming expiration times.
(This used to be commit c79ae57388)
* Rely on the fact that name2sid will work for any name
in a trusted domain will work against our primary domain
(even in the absense of an incoming trust path)
* Only logons will reliably work and the idmap backend
is responsible for being able to manage id's without contacting
the trusted domain
* "getent passwd" and "getent group" for trusted users and groups
will work but we cannot get the group membership of a user in any
fashion without the user first logging on (via NTLM or krb5)
and the netsamlogon_cache being updated.
(This used to be commit dee2bce2af)
PAM_DELETE_CREDS flag set) any user could delete krb5 credential caches.
Make sure that only root can do this.
Jerry, Jeremy, please check.
Guenther
(This used to be commit 947a59a849)
* Fix getgroups() call called using a normalized name
* Fix some more name mappings that could cause for example
a user to be unable to unlock the screen as the username
would not match in the PAM authenticate call.
(This used to be commit 505fc669a1)
changed a password via pam_chauthtok. Only do this if
a) a user logs on using an expired password (or a password that needs to
be changed immediately) or
b) the user itself changes his password.
Also make sure to delete the in-memory krb5 credential cache (when a
user did not request a FILE based cred cache).
Finally honor the krb5 settings in the first pam authentication in the
chauthtok block (PAM_PRELIM_CHECK). This circumvents confusion when
NTLM samlogon authentication is still possible with the old password after
the password has been already changed (on w2k3 sp1 dcs).
Guenther
(This used to be commit c3005c48cd)
For the winbind cached ADS LDAP connection handling
(ads_cached_connection()) we were (incorrectly) assuming that the
service ticket lifetime equaled the tgt lifetime. For setups where the
service ticket just lives 10 minutes, we were leaving hundreds of LDAP
connections in CLOSE_WAIT state, until we fail to service entirely with
"Too many open files".
Also sequence_number() in winbindd_ads.c needs to delete the cached LDAP
connection after the ads_do_search_retry() has failed to submit the
search request (although the bind succeeded (returning an expired
service ticket that we cannot delete from the memory cred cache - this
will get fixed later)).
Guenther
(This used to be commit 7e1a84b722)
Patch details:
Support most options in pam_winbind.conf; support comma-separated names in
require-membership-of. Details below:
1) Provides support for almost all config options in pam_winbind.conf
(all except for use_first_pass, use_authtok, and unknown_ok).
- That allows us to work well when invoked via call_modules from
pam_unix2.conf as well as allowing use of spaces in names used
w/require_membership_of.
2) Support for comma-separated list of names or SID strings in
require_membership_of/require-membership-of.
- Increased require_membership_of field in winbind request from fstring
(256) to pstring (1024).
- In PAM side, parse out multiple names or SID strings and convert
all of them to SID strings.
- In Winbind side, support membership check against multiple SID strings.
(This used to be commit 4aca986489)
chnage fails due to policy settings where as 2003 (the chgpasswd3()
request) fails with NT_STATUS_PASSWORD_RESTRICTION. Thunk down
to the same return code so we correctly retreive the password policy
in both cases.
(This used to be commit 262bb80e9c)
In case a user authenticated sucessfully and his password just expired
while beeing disconnected, we should allow a user to logon (given a
clear warning). We currently forced the user into a password change
dialogue in that scenario; this did not make much sense while offline.
Guenther
(This used to be commit 668b278653)
NSS protocols auth, chauthtok, logoff, ccache_ntlm_auth.
That way we ensure winbindd only deals with fully
qualified names internally. The NSS protocols
auth_crap and chng_pswd_auth_crap should be fixed
to do the same thing.
Jeremy.
(This used to be commit dbd2454d33)
* autogenerate lsa ndr code
* rename 'enum SID_NAME_USE' to 'enum lsa_SidType'
* merge a log more security descriptor functions from
gen_ndr/ndr_security.c in SAMBA_4_0
The most embarassing thing is the "#define strlen_m strlen"
We need a real implementation in SAMBA_3_0 which I'll work on
after this code is in.
(This used to be commit 3da9f80c28)
this at the moment as I'm working on this area. Thanks
a lot Guenther.
Add the capability to get krb5 tickets even if we
log on in the offline state and have to cache
the credentials. Once we go online we should
start getting krb5 tickets again. Currently
this code waits until lp_winbind_cache_time()
seconds (5 minutes by default) before getting
tickets. This is correct in the DC down case,
but not in the global offline -> online case.
I'll later add a trigger to force an immediate refresh
on the offline -> online state transition.
Jeremy.
(This used to be commit 04fe034f4a)
name that will be returned by winbindd. This
(should) fix the bug where the user logs in
with DOMAIN\user but winbindd returns only
"user" for the username due to 'winbind use
default domain' being set.
Jeremy.
(This used to be commit 1b2aa17354)
from the krb5 ticket renewal code. This allows cached
credentials to be stored for single sign-on via ntlm_auth
for machines in a domain still using NTLM. Also (hopefully)
fixes the reference counting problem with pam_logon/logoff
so multiple logons/logoffs won't lose cached credentials.
This compiles, but I'm intending to test it over the weekend
so don't complain too much :-). I also want it in the tree
so Coverity can scan it for errors. Guenther, check this over
please - I ran through the architecture with Jerry and he's
ok with it, but this is modifying your code a lot.
Jeremy.
(This used to be commit 679eeeb911)
* Merge patches from SLES10 to make sure we talk to the correct
winbindd process when performing pam_auth (and pull the password policy info).
(This used to be commit 43bd8c00ab)
the nt hash directly in the winbindd cache, store a
salted version (MD5 of salt + nt_hash). This is what
we do in the LDAP password history code. We store
this salted cache entry under the same name as an old
entry (CRED/<sid>) but detect it on read by checking
if there are 17 bytes of data after the first stored
hash (1 byte len, 16 bytes hash). GD PLEASE CHECK.
Jeremy.
(This used to be commit 89d0163a97)
ntlm_auth module to allow it to use winbindd cached
credentials.The credentials are currently only stored
in a krb5 MIT environment - we need to add an option to
winbindd to allow passwords to be stored even in an NTLM-only
environment.
Patch from Robert O'Callahan, modified with some fixes
by me.
Jeremy.
(This used to be commit ae7cc298a1)
This mode proxies pre-calculated blobs from a remote (probably VPN)
client into the domain. This allows clients to change their password
over a PPTP connection (where they would not be able to connect to
SAMR directly).
The precalculated blobs do not reveal the plaintext password.
Original patch by Alexey Kobozev <cobedump@gmail.com>
(This used to be commit 967292b713)
