sssd performance on large domains
by zfnoctis＠gmail.com
Hi,
I'm wondering if there are any plans to improve sssd performance on large active directory domains (100k+ users, 40k+ groups), or if there are settings I am not aware of that can greatly improve performance, specifically for workstation use cases.
Currently if I do not set "ignore_group_members = True" in sssd.conf, logins can take upwards of 6 minutes and "sssd_be" will max the CPU for up to 20 minutes after logon, which makes it a non-starter. The reason I want to allow group members to be seen is that I want certain domain groups to be able to perform elevated actions using polkit. If I ignore group members, polkit reports that the group is empty and so no one can elevate in the graphical environment.
Ultimately this means that Linux workstations are at a severe disadvantage since they cannot be bound to the domain and have the normal set of access features users and IT expect from macOS or Windows.
Distributions used: Ubuntu 16.04 (sssd 1.13.4-1ubuntu1.1), Ubuntu 16.10 (sssd 1.13.4-3) and Fedora 24 (sssd-1.13.4-3.fc24). All exhibit the same problems.
I've also tried "ldap_group_nesting_level = 1" without seeing any noticeable improvement with respect to performance. Putting the database on /tmp isn't viable as these are workstations that will reboot semi-frequently, and I don't believe this is an I/O bound performance issue anyways.
Thanks for your time.
1 year, 10 months
kcm, gssproxy and klist
by Winberg Adam
With KCM and gssproxy we often see a long list of credentials when doing a 'klist':
[user.u@lxserv2114 ~]$ klist
Ticket cache: KCM:17098:66803
Default principal: user.u@AD
Valid starting Expires Service principal
01/01/1970 00:00:00 01/01/1970 00:00:00 Encrypted/Credentials/v1@X-GSSPROXY:
01/01/1970 00:00:00 01/01/1970 00:00:00 Encrypted/Credentials/v1@X-GSSPROXY:
01/01/1970 00:00:00 01/01/1970 00:00:00 Encrypted/Credentials/v1@X-GSSPROXY:
01/01/1970 00:00:00 01/01/1970 00:00:00 Encrypted/Credentials/v1@X-GSSPROXY:
01/01/1970 00:00:00 01/01/1970 00:00:00 Encrypted/Credentials/v1@X-GSSPROXY:
01/01/1970 00:00:00 01/01/1970 00:00:00 Encrypted/Credentials/v1@X-GSSPROXY:
01/01/1970 00:00:00 01/01/1970 00:00:00 Encrypted/Credentials/v1@X-GSSPROXY:
and so on...
The actual gssproxy credentials at /var/lib/gssproxy/clients/ does not correspond with this output, it only contains what could be expected - a TGT and maybe some service tickets.
The ever growing 'klist' list of credentials is a problem, after a while the user can no longer get any new credentials and therefore has no access to its NFS homedir (sec=krb5). I'm guessing it's the 'max_uid_ccaches' option in sssd-kcm that prevents this.
What is going on here - have we configured gssproxy/kcm wrong or is this a bug?
Regards
Adam
1 year, 11 months
sssd: AD range retrieval fails when enumeration is enabled
by R Davies
Hi,
When enumeration is enabled (required due to legacy application), and where
a group has > 1500 members, and AD's MaxValRange is at the default 1500,
then sssd fails to show more than 1500 group members. Group lookups are no
longer accurate.
A further interesting aspect is that if the sssd cache is expired (sssctl
cache-expiry -E), then the correct group membership is shown until such
time as enumeration is processed again (i.e. at most
ldap_enumeration_refresh_timeout + memcache_timeout)
src/providers/ldap/sdap.c's sdap_parse_entry() states:
/* This attribute contained range values and needs more to
> * be retrieved
> */
> /* TODO: return the set of attributes that need additional retrieval
> * For now, we'll continue below and treat it as regular values.
> */
As enumeration is enabled the subsequent ASQ/deref work is never
undertaken. As such sssd only ever processes the initial range retrieved
members (0-1499) (NB that nested groups members are evaluated).
We have looked at the relevant source code, but can't find a way to trigger
Attribute Scope Queries (ASQ)/deref. Indeed, no manner of sssd
configuration settings (other than disabling enumeration - which we sadly
cannot do) appears to change this behaviour. Increasing MaxValRange on AD
defeats the purpose of having MaxValRange.
Has anyone run into this before? Or, should I raise a new issue?
Many Thanks.
R.
2 years, 3 months
ID Views for IPA ID Views for AD users inconsistent resolution
by Louis Abel
I didn't get a response in #sssd, so I figured I'll try here at the mail list.
# rpm -q sssd ipa-server
sssd-1.16.0-19.el7_5.5.x86_64
ipa-server-4.5.4-10.el7_5.3.x86_64
I've been scratching my head trying to resolve this particular issue. I'm having issues with AD users where when they login, they'll get the UID/GID assigned in the ID views correctly, but only some of the time. Other times, they won't get the id view assigned to them. This is all done in the default trust view. What makes this issue even more interesting is that out of my 6 domain controllers, sometimes it'll be one server out of the six that does it, sometimes it's two. But it's never the same ones, so it's difficult to track the particular issue down. What's even more interesting is this is not occurring with some users (like my own). I have yet to see it occur with my account or even the rest of my team's accounts. One of the things I tried to do is delete the ID views of the offending users and recreate them to no avail.
I put SSSD into debug mode on the IPA servers and tried to get some relevant logs and such to try and figure this out. Below is my SSSD configuration, ldb info, and debug logs (removing private information where possible). I'm trying to determine if this is either a bug within SSSD or if this is a misconfiguration on my part.
$ ldbsearch -H cache_ipa.example.com.ldb name=user.name(a)ad.example.com originalADuidNumber uidNumber originalADgidNumber gidNumber
asq: Unable to register control with rootdse!
# record 1
dn: name=user.name(a)ad.example.com,cn=users,cn=ad.example.com,cn=sysdb
originalADuidNumber: 55616902
originalADgidNumber: 55616902
uidNumber: 55616902
gidNumber: 55616902
$ ipa idoverrideuser-show "Default Trust View" user.name(a)ad.example.com
Anchor to override: user.name(a)ad.example.com
UID: 40001
GID: 40001
Home directory: /home/user.name
Login shell: /bin/bash
$ ldbsearch -H timestamps_ipa.example.com.ldb | less
dn: name=user.name(a)ad.example.com,cn=users,cn=ad.example.com,cn=sysdb
objectCategory: user
originalModifyTimestamp: 20180823172515.0Z
entryUSN: 92632390
initgrExpireTimestamp: 1535133621
lastUpdate: 1535128235
dataExpireTimestamp: 1535133635
distinguishedName: name=user.name(a)ad.example.com,cn=users,cn=ad.example.com,cn=sysdb
## DEBUG LOGS
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [sysdb_set_entry_attr] (0x0200): Entry [name=user.name(a)ad.example.com,cn=users,cn=ad.example.com,cn=sysdb] has set [ts_cache] attrs.
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [ldb] (0x4000): commit ldb transaction (nesting: 0)
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [sdap_id_op_connect_step] (0x4000): reusing cached connection
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [ipa_get_ad_override_connect_done] (0x4000): Searching for overrides in view [Default Trust View] with filter [(&(objectClass=ipaOverrideAnchor)(ipaAnchorUUID=:SID:S-1-5-21-922099545-2851689246-2917073205-16902))].
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [sdap_print_server] (0x2000): Searching 172.20.23.190:389
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [sdap_get_generic_ext_step] (0x0400): calling ldap_search_ext with [(&(objectClass=ipaOverrideAnchor)(ipaAnchorUUID=:SID:S-1-5-21-922099545-2851689246-2917073205-16902))][cn=Default Trust View,cn=views,cn=accounts,dc=ipa,dc=chotel,dc=com].
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [sdap_get_generic_ext_step] (0x2000): ldap_search_ext called, msgid = 32
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [sdap_op_add] (0x2000): New operation 32 timeout 6
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [sdap_process_result] (0x2000): Trace: sh[0x55f30a5d1080], connected[1], ops[(nil)], ldap[0x55f30a5d0f90]
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [sdap_process_result] (0x2000): Trace: end of ldap_result list
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [sdap_process_result] (0x2000): Trace: sh[0x55f30a5d1940], connected[1], ops[0x55f30a645310], ldap[0x55f30a5ce320]
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [sdap_process_message] (0x4000): Message type: [LDAP_RES_SEARCH_ENTRY]
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [sdap_parse_entry] (0x1000): OriginalDN: [ipaanchoruuid=:SID:S-1-5-21-922099545-2851689246-2917073205-16902,cn=Default Trust View,cn=views,cn=accounts,dc=ipa,dc=chotel,dc=com].
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [sdap_parse_range] (0x2000): No sub-attributes for [objectClass]
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [sdap_parse_range] (0x2000): No sub-attributes for [loginShell]
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [sdap_parse_range] (0x2000): No sub-attributes for [uidNumber]
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [sdap_parse_range] (0x2000): No sub-attributes for [ipaAnchorUUID]
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [sdap_parse_range] (0x2000): No sub-attributes for [gidNumber]
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [sdap_parse_range] (0x2000): No sub-attributes for [homeDirectory]
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [sdap_parse_range] (0x2000): No sub-attributes for [ipaOriginalUid]
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [sdap_process_result] (0x2000): Trace: sh[0x55f30a5d1940], connected[1], ops[0x55f30a645310], ldap[0x55f30a5ce320]
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [sdap_process_message] (0x4000): Message type: [LDAP_RES_SEARCH_RESULT]
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [sdap_get_generic_op_finished] (0x0400): Search result: Success(0), no errmsg set
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [sdap_op_destructor] (0x2000): Operation 32 finished
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [ipa_get_ad_override_done] (0x4000): Found override for object with filter [(&(objectClass=ipaOverrideAnchor)(ipaAnchorUUID=:SID:S-1-5-21-922099545-2851689246-2917073205-16902))].
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [sdap_id_op_destroy] (0x4000): releasing operation connection
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [sysdb_apply_default_override] (0x4000): Override [uidNumber] with [40001] for [name=user.name(a)ad.example.com,cn=users,cn=ad.example.com,cn=sysdb].
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [sysdb_apply_default_override] (0x0080): Override attribute for [gidNumber] has more [2] than one value, using only the first.
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [sysdb_apply_default_override] (0x4000): Override [gidNumber] with [40001] for [name=user.name(a)ad.example.com,cn=users,cn=ad.example.com,cn=sysdb].
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [sysdb_apply_default_override] (0x4000): Override [homeDirectory] with [/home/user.name] for [name=user.name(a)ad.example.com,cn=users,cn=ad.example.com,cn=sysdb].
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [sysdb_apply_default_override] (0x4000): Override [loginShell] with [/bin/bash] for [name=user.name(a)ad.example.com,cn=users,cn=ad.example.com,cn=sysdb].
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [ldb] (0x4000): Added timed event "ltdb_callback": 0x55f30a6819a0
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [ldb] (0x4000): Added timed event "ltdb_timeout": 0x55f30a681a60
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [ldb] (0x4000): Running timer event 0x55f30a6819a0 "ltdb_callback"
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [ldb] (0x4000): Destroying timer event 0x55f30a681a60 "ltdb_timeout"
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [ldb] (0x4000): Ending timer event 0x55f30a6819a0 "ltdb_callback"
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [safe_original_attributes] (0x4000): Original object does not have [sshPublicKey] set.
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [ldb] (0x4000): Added timed event "ltdb_callback": 0x55f30a683c50
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [ldb] (0x4000): Added timed event "ltdb_timeout": 0x55f30a683d10
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [ldb] (0x4000): Running timer event 0x55f30a683c50 "ltdb_callback"
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [ldb] (0x4000): Destroying timer event 0x55f30a683d10 "ltdb_timeout"
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [ldb] (0x4000): Ending timer event 0x55f30a683c50 "ltdb_callback"
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [sysdb_ldb_msg_difference] (0x2000): Replaced/extended attr [uidNumber] of entry [name=user.name(a)ad.example.com,cn=users,cn=ad.example.com,cn=sysdb]
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [ldb] (0x4000): start ldb transaction (nesting: 0)
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [ldb] (0x4000): Added timed event "ltdb_callback": 0x55f30a68d1c0
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [ldb] (0x4000): Added timed event "ltdb_timeout": 0x55f30a68d280
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [ldb] (0x4000): Running timer event 0x55f30a68d1c0 "ltdb_callback"
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [ldb] (0x4000): Destroying timer event 0x55f30a68d280 "ltdb_timeout"
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [ldb] (0x4000): Ending timer event 0x55f30a68d1c0 "ltdb_callback"
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [ldb] (0x4000): commit ldb transaction (nesting: 0)
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [sysdb_set_entry_attr] (0x0200): Entry [name=user.name(a)ad.example.com,cn=users,cn=ad.example.com,cn=sysdb] has set [cache, ts_cache] attrs.
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [ldb] (0x4000): Added timed event "ltdb_callback": 0x55f30a68d330
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [ldb] (0x4000): Added timed event "ltdb_timeout": 0x55f30a688900
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [ldb] (0x4000): Running timer event 0x55f30a68d330 "ltdb_callback"
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [ldb] (0x4000): Added timed event "ltdb_callback": 0x55f30a689320
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [ldb] (0x4000): Added timed event "ltdb_timeout": 0x55f30a6893e0
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [ldb] (0x4000): Destroying timer event 0x55f30a688900 "ltdb_timeout"
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [ldb] (0x4000): Ending timer event 0x55f30a68d330 "ltdb_callback"
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [ldb] (0x4000): Running timer event 0x55f30a689320 "ltdb_callback"
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [ldb] (0x4000): Added timed event "ltdb_callback": 0x55f30a634920
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [ldb] (0x4000): Added timed event "ltdb_timeout": 0x55f30a6349e0
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [ldb] (0x4000): Destroying timer event 0x55f30a6893e0 "ltdb_timeout"
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [ldb] (0x4000): Ending timer event 0x55f30a689320 "ltdb_callback"
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [ldb] (0x4000): Running timer event 0x55f30a634920 "ltdb_callback"
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [ldb] (0x4000): Destroying timer event 0x55f30a6349e0 "ltdb_timeout"
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [ldb] (0x4000): Ending timer event 0x55f30a634920 "ltdb_callback"
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [ipa_initgr_get_overrides_step] (0x1000): Processing group 0/1
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [ipa_initgr_get_overrides_step] (0x1000): Fetching group S-1-5-21-922099545-2851689246-2917073205-20676
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [sdap_id_op_connect_step] (0x4000): reusing cached connection
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [ipa_get_ad_override_connect_done] (0x4000): Searching for overrides in view [Default Trust View] with filter [(&(objectClass=ipaOverrideAnchor)(ipaAnchorUUID=:SID:S-1-5-21-922099545-2851689246-2917073205-20676))].
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [sdap_print_server] (0x2000): Searching 172.20.23.190:389
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [sdap_get_generic_ext_step] (0x0400): calling ldap_search_ext with [(&(objectClass=ipaOverrideAnchor)(ipaAnchorUUID=:SID:S-1-5-21-922099545-2851689246-2917073205-20676))][cn=Default Trust View,cn=views,cn=accounts,dc=ipa,dc=chotel,dc=com].
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [sdap_get_generic_ext_step] (0x2000): ldap_search_ext called, msgid = 33
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [sdap_op_add] (0x2000): New operation 33 timeout 6
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [sdap_process_result] (0x2000): Trace: sh[0x55f30a5d1940], connected[1], ops[0x55f30a63f270], ldap[0x55f30a5ce320]
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [sdap_process_result] (0x2000): Trace: end of ldap_result list
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [sdap_process_result] (0x2000): Trace: sh[0x55f30a5d1940], connected[1], ops[0x55f30a63f270], ldap[0x55f30a5ce320]
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [sdap_process_message] (0x4000): Message type: [LDAP_RES_SEARCH_RESULT]
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [sdap_get_generic_op_finished] (0x0400): Search result: Success(0), no errmsg set
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [sdap_op_destructor] (0x2000): Operation 33 finished
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [ipa_get_ad_override_done] (0x4000): No override found with filter [(&(objectClass=ipaOverrideAnchor)(ipaAnchorUUID=:SID:S-1-5-21-922099545-2851689246-2917073205-20676))].
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [sdap_id_op_destroy] (0x4000): releasing operation connection
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [ipa_initgr_get_overrides_step] (0x1000): Processing group 1/1
(Fri Aug 24 16:30:12 2018) [sssd[be[ipa.example.com]]] [ipa_get_ad_memberships_send] (0x0400): External group information still valid.
## /etc/sssd/sssd.conf
[domain/ipa.example.com]
cache_credentials = True
krb5_store_password_if_offline = True
# krb5_realm = IPA.EXAMPLE.COM
ipa_domain = ipa.example.com
ipa_hostname = entl01.ipa.example.com
# Server Specific Settings
ipa_server = entl01.ipa.example.com
ipa_server_mode = True
subdomain_homedir = %o
fallback_homedir = /home/%u
default_shell = /bin/bash
id_provider = ipa
auth_provider = ipa
access_provider = ipa
chpass_provider = ipa
ldap_tls_cacert = /etc/ipa/ca.crt
[sssd]
services = nss, sudo, pam, ssh
domains = ipa.example.com
[nss]
filter_users = root,ldap,named,avahi,haldaemon,dbus,radiusd,news,nscd,tomcat,activemq,informix,oracle,xdba,grid,dbadmin,weblogic,operator,postgres,devolog
memcache_timeout = 600
homedir_substring = /home
[pam]
[sudo]
[autofs]
[ssh]
[pac]
[ifp]
2 years, 4 months
Starting SSSD without root
by Tero Saarni
Hi,
I'm trying to run SSSD inside docker container without root user. The
container is executed in OpenShift cluster which does not allow running as root
inside container.
SSSD requires root and checks for this specifically.
Is there any workaround for this?
I believe the limitation is implemented for security reasons, in order to have
most critical parts executed as root and have it drop privileges for other
parts but this now completely blocks using SSSD in the above environment.
--
Tero
2 years, 8 months
Password expiration in AD with SSSD
by Paweł Szafer
Hi,
I want to warn users when password expiration days are less than 14 days.
I have GPO Default domain policy with this number of days.
I have sssd.conf as:
[sssd]
domains = internal.domain.tld
config_file_version = 2
services = nss, pam
[domain/internal.domain.tld]
cache_credentials = True
debug_level = 6
id_provider = ad
auth_provider = ad
access_provider = ad
default_shell = /bin/bash
fallback_homedir = /home/%d/%u
ldap_id_mapping = True
ldap_schema = ad
enumerate = True
ad_site=internal1
ad_gpo_access_control = permissive
ad_gpo_ignore_unreadable = True
And pam.d as follow:
#%PAM-1.0
auth sufficient pam_sss.so forward_pass
auth required pam_unix.so try_first_pass nullok
auth optional pam_permit.so
auth required pam_env.so
#auth requisite pam_deny.so
account required pam_unix.so
account [default=bad success=ok user_unknown=ignore] pam_sss.so
account optional pam_permit.so
account required pam_time.so
password required pam_unix.so try_first_pass nullok sha512 shadow
password sufficient pam_sss.so
use_authok
password optional pam_permit.so
session required pam_mkhomedir.so
skel=/etc/skel/ umask=0022
session required pam_limits.so
session required pam_unix.so
session optional pam_sss.so
session optional pam_permit.so
User has password valid till 20.02.2020 and yet I don't have any warning.
I had to add ad_gpo_ignore_unreadable = True and ad_gpo_access_control =
permissive to my config because without it I end up with "System error"
during login and unsuccessful login.
In gpo_cache I see Machine gpo with lines:
[Registry Values]
MACHINE\Software\Microsoft\Windows
NT\CurrentVersion\Winlogon\PasswordExpiryWarning=4,14
Any idea how to turn on this warning?
Thanks for your help!
-----
Best regards,
Pawel
2 years, 9 months
[hs@schlittermann.de: sssd nss: issues with applications not using endpwent()]
by Heiko Schlittermann
Hi,
I sent this to sssd-devel already, but probably it was the wrong
channel, so I'm trying it here.
I'm using Dovecot with its "passwd" userdb, which effectivly uses NSS.
NSS services are provided by the files and by the sss "plugins".
The `doveadm user *` command enumerates the list of users. Repeating the
command doesn't enumerate the users provided by sssd again.
Analyzing this issue reveals:
Dovecot uses a long living process talking to NSS. For user
enumeration it uses
setpwent()
while (…) { getpwent(); }
and then misses the call to endpwent(). This bug is already confirmed by
the Dovecot developers.
I'm not sure about the semantics of setpwent()/endpwend(), especially
about calling sequences like
setpwent()
while (…) { getpwent(); }
setpwent()
while (…) { getpwent(); }
According to setpwent(3) it should rewind to the beginning. Calling
endpwent() seems to be for curtesy only (to have resources freed)
I suggest calling a preventive endpwent() before using setpwent() again
in nss_cmd.c.
Attached you'll find my patch. I'd be happy about review and integration into
upstream.
Best regards from Dresden/Germany
Viele Grüße aus Dresden
Heiko Schlittermann
--
SCHLITTERMANN.de ---------------------------- internet & unix support -
Heiko Schlittermann, Dipl.-Ing. (TU) - {fon,fax}: +49.351.802998{1,3} -
gnupg encrypted messages are welcome --------------- key ID: F69376CE -
2 years, 9 months
Re: SSSD-AD Password auth at 2.3 level (CentOS 8)?
by Justin Stephenson
Hi,
You are right, the question is why does a second ldap child get forked
- the /var/log/sssd/domain_$domain.log should give some clues. As a
guess you may need to set `ad_enabled_domains = domain.bu.edu' in
sssd.conf to disable auto discovery of trusted domains. If this
doesn't help please send me the sanitized domain log directly and I
can take a look.
-Justin
On Tue, Feb 23, 2021 at 2:21 PM Conwell, Nik <nik(a)bu.edu> wrote:
>
> Hi all, can anyone offer some insight into how password authentication works with sssd-ad on the 2.3 version (CentOS 8)? It doesn’t seem to working as it was under the 1.16. Details below.
>
>
>
> We’ve been running SSSD 1.16 on CentOS7 for a while without issue. But on CentOS 8 at the 2.3 levels we are having issues with AD password auth. Authenticating in with KRB5 works just fine, we’re able to realm join, get the keytabs, etc., that all seems reasonable.
>
>
>
> The issue with the password auth not working seems to be related to SSSD not being able to get a service ticket for the host/myhost.bu.edu@DOMAIN possibly making an unauthenticated call instead of previously using the krb5tgt in the /var/lib/sss/db ccache?
>
>
>
> Cranking up debug I see ldap_child working fine when getting our initial TGT:
>
>
>
> (2021-02-23 11:31:29): [ldap_child[1485202]] [main] (0x0400): ldap_child started.
>
> (2021-02-23 11:31:29): [ldap_child[1485202]] [main] (0x2000): context initialized
>
> (2021-02-23 11:31:29): [ldap_child[1485202]] [unpack_buffer] (0x1000): total buffer size: 41
>
> (2021-02-23 11:31:29): [ldap_child[1485202]] [unpack_buffer] (0x1000): realm_str size: 9
>
> (2021-02-23 11:31:29): [ldap_child[1485202]] [unpack_buffer] (0x1000): got realm_str: [DOMAIN.BU.EDU]
>
> (2021-02-23 11:31:29): [ldap_child[1485202]] [unpack_buffer] (0x1000): princ_str size: 8
>
> (2021-02-23 11:31:29): [ldap_child[1485202]] [unpack_buffer] (0x1000): got princ_str: [server]$
>
> (2021-02-23 11:31:29): [ldap_child[1485202]] [unpack_buffer] (0x1000): keytab_name size: 0
>
> (2021-02-23 11:31:29): [ldap_child[1485202]] [unpack_buffer] (0x1000): lifetime: 86400
>
> (2021-02-23 11:31:29): [ldap_child[1485202]] [unpack_buffer] (0x0200): Will run as [0][0].
>
> […]
>
> (2021-02-23 11:31:29): [ldap_child[1485202]] [main] (0x2000): getting TGT sync
>
> (2021-02-23 11:31:29): [ldap_child[1485202]] [ldap_child_get_tgt_sync] (0x2000): got realm_name: [DOMAIN.BU.EDU]
>
> (2021-02-23 11:31:29): [ldap_child[1485202]] [ldap_child_get_tgt_sync] (0x0100): Principal name is: [server]$(a)DOMAIN.BU.EDU]
>
> (2021-02-23 11:31:29): [ldap_child[1485202]] [ldap_child_get_tgt_sync] (0x0100): Using keytab [MEMORY:/etc/krb5.keytab]
>
> (2021-02-23 11:31:29): [ldap_child[1485202]] [sss_child_krb5_trace_cb] (0x4000): [1485202] 1614097889.649498: Getting initial credentials for [server]$(a)DOMAIN.BU.EDU
>
> (2021-02-23 11:31:29): [ldap_child[1485202]] [sss_child_krb5_trace_cb] (0x4000): [1485202] 1614097889.649499: Looked up etypes in keytab: aes128-cts, aes256-cts
>
> (2021-02-23 11:31:29): [ldap_child[1485202]] [sss_child_krb5_trace_cb] (0x4000): [1485202] 1614097889.649501: Sending unauthenticated request
>
> […]
>
> (2021-02-23 11:31:29): [ldap_child[1485202]] [sss_child_krb5_trace_cb] (0x4000): [1485202] 1614097889.649507: Response was from master KDC
>
> (2021-02-23 11:31:29): [ldap_child[1485202]] [sss_child_krb5_trace_cb] (0x4000): [1485202] 1614097889.649508: Received error from KDC: -1765328359/Additional pre-authentication required
>
> (2021-02-23 11:31:29): [ldap_child[1485202]] [sss_child_krb5_trace_cb] (0x4000): [1485202] 1614097889.649511: Preauthenticating using KDC method data
>
> (2021-02-23 11:31:29): [ldap_child[1485202]] [sss_child_krb5_trace_cb] (0x4000): [1485202] 1614097889.649512: Processing preauth types: PA-PK-AS-REQ (16), PA-PK-AS-REP_OLD (15), PA-ETYPE-INFO2 (19), PA-ENC-TIMESTAMP (2)
>
> […]
>
> (2021-02-23 11:31:29): [ldap_child[1485202]] [sss_child_krb5_trace_cb] (0x4000): [1485202] 1614097889.649525: Response was from master KDC
>
> […]
>
> (2021-02-23 11:31:29): [ldap_child[1485202]] [ldap_child_get_tgt_sync] (0x2000): credentials initialized
>
> (2021-02-23 11:31:29): [ldap_child[1485202]] [ldap_child_get_tgt_sync] (0x2000): keytab ccname: [FILE:/var/lib/sss/db/ccache_DOMAIN.BU.EDU_j0b5Vd]
>
> (2021-02-23 11:31:29): [ldap_child[1485202]] [sss_child_krb5_trace_cb] (0x4000): [1485202] 1614097889.649532: Initializing FILE:/var/lib/sss/db/ccache_DOMAIN.BU.EDU_j0b5Vd with default princ server$(a)DOMAIN.BU.EDU
>
> […]
>
> (2021-02-23 11:31:29): [ldap_child[1485202]] [ldap_child_get_tgt_sync] (0x2000): credentials stored
>
> (2021-02-23 11:31:29): [ldap_child[1485202]] [ldap_child_get_tgt_sync] (0x2000): Got KDC time offset
>
> (2021-02-23 11:31:29): [ldap_child[1485202]] [ldap_child_get_tgt_sync] (0x2000): Renaming [/var/lib/sss/db/ccache_DOMAIN.BU.EDU_j0b5Vd] to [/var/lib/sss/db/ccache_DOMAIN.BU.EDU]
>
> […]
>
> (2021-02-23 11:31:29): [ldap_child[1485202]] [pack_buffer] (0x1000): result [0] krberr [0] msgsize [37] msg [FILE:/var/lib/sss/db/ccache_DOMAIN.BU.EDU]
>
> (2021-02-23 11:31:29): [ldap_child[1485202]] [main] (0x0400): ldap_child completed successfully
>
>
>
> But then right after I see ldap_child being called to get a host ticket:
>
>
>
> (2021-02-23 11:31:29): [ldap_child[1485203]] [main] (0x0400): ldap_child started.
>
> (2021-02-23 11:31:29): [ldap_child[1485203]] [main] (0x2000): context initialized
>
> (2021-02-23 11:31:29): [ldap_child[1485203]] [unpack_buffer] (0x1000): total buffer size: 52
>
> (2021-02-23 11:31:29): [ldap_child[1485203]] [unpack_buffer] (0x1000): realm_str size: 9
>
> (2021-02-23 11:31:29): [ldap_child[1485203]] [unpack_buffer] (0x1000): got realm_str: DOMAIN.BU.EDU
>
> (2021-02-23 11:31:29): [ldap_child[1485203]] [unpack_buffer] (0x1000): princ_str size: 19
>
> (2021-02-23 11:31:29): [ldap_child[1485203]] [unpack_buffer] (0x1000): got princ_str: host/server.bu.edu
>
> (2021-02-23 11:31:29): [ldap_child[1485203]] [unpack_buffer] (0x1000): keytab_name size: 0
>
> (2021-02-23 11:31:29): [ldap_child[1485203]] [unpack_buffer] (0x1000): lifetime: 86400
>
> (2021-02-23 11:31:29): [ldap_child[1485203]] [unpack_buffer] (0x0200): Will run as [0][0].
>
> (2021-02-23 11:31:29): [ldap_child[1485203]] [privileged_krb5_setup] (0x2000): Kerberos context initialized
>
> (2021-02-23 11:31:29): [ldap_child[1485203]] [main] (0x2000): Kerberos context initialized
>
> (2021-02-23 11:31:29): [ldap_child[1485203]] [become_user] (0x0200): Trying to become user [0][0].
>
> (2021-02-23 11:31:29): [ldap_child[1485203]] [become_user] (0x0200): Already user [0].
>
> (2021-02-23 11:31:29): [ldap_child[1485203]] [main] (0x2000): Running as [0][0].
>
> (2021-02-23 11:31:29): [ldap_child[1485203]] [main] (0x2000): getting TGT sync
>
> (2021-02-23 11:31:29): [ldap_child[1485203]] [ldap_child_get_tgt_sync] (0x2000): got realm_name: [DOMAIN.BU.EDU]
>
> (2021-02-23 11:31:29): [ldap_child[1485203]] [ldap_child_get_tgt_sync] (0x0100): Principal name is: [host/server.bu.edu(a)DOMAIN.BU.EDU]
>
> (2021-02-23 11:31:29): [ldap_child[1485203]] [ldap_child_get_tgt_sync] (0x0100): Using keytab [MEMORY:/etc/krb5.keytab]
>
> (2021-02-23 11:31:29): [ldap_child[1485203]] [sss_child_krb5_trace_cb] (0x4000): [1485203] 1614097889.687429: Getting initial credentials for host/server.bu.edu(a)DOMAIN.BU.EDU
>
> (2021-02-23 11:31:29): [ldap_child[1485203]] [sss_child_krb5_trace_cb] (0x4000): [1485203] 1614097889.687430: Looked up etypes in keytab: aes128-cts, aes256-cts
>
> (2021-02-23 11:31:29): [ldap_child[1485203]] [sss_child_krb5_trace_cb] (0x4000): [1485203] 1614097889.687432: Sending unauthenticated request
>
> (2021-02-23 11:31:29): [ldap_child[1485203]] [sss_child_krb5_trace_cb] (0x4000): [1485203] 1614097889.687433: Sending request (213 bytes) to DOMAIN.BU.EDU
>
> (2021-02-23 11:31:29): [ldap_child[1485203]] [sss_child_krb5_trace_cb] (0x4000): [1485203] 1614097889.687434: Initiating TCP connection to stream [IP]:88
>
> (2021-02-23 11:31:29): [ldap_child[1485203]] [sss_child_krb5_trace_cb] (0x4000): [1485203] 1614097889.687435: Sending TCP request to stream [IP]:88
>
> (2021-02-23 11:31:29): [ldap_child[1485203]] [sss_child_krb5_trace_cb] (0x4000): [1485203] 1614097889.687436: Received answer (90 bytes) from stream [IP]:88
>
> (2021-02-23 11:31:29): [ldap_child[1485203]] [sss_child_krb5_trace_cb] (0x4000): [1485203] 1614097889.687437: Terminating TCP connection to stream [IP]:88
>
> (2021-02-23 11:31:29): [ldap_child[1485203]] [sss_child_krb5_trace_cb] (0x4000): [1485203] 1614097889.687438: Response was from master KDC
>
> (2021-02-23 11:31:29): [ldap_child[1485203]] [sss_child_krb5_trace_cb] (0x4000): [1485203] 1614097889.687439: Received error from KDC: -1765328378/Client not found in Kerberos database
>
> (2021-02-23 11:31:29): [ldap_child[1485203]] [ldap_child_get_tgt_sync] (0x0040): krb5_get_init_creds_keytab() failed: -1765328378
>
> (2021-02-23 11:31:29): [ldap_child[1485203]] [ldap_child_get_tgt_sync] (0x0010): Failed to initialize credentials using keytab [MEMORY:/etc/krb5.keytab]: Client 'host/server.bu.edu(a)DOMAIN.BU.EDU' not found in Kerberos database. Unable to create GSSAPI-encrypted LDAP connection.
>
> (2021-02-23 11:31:29): [ldap_child[1485203]] [unique_filename_destructor] (0x2000): Unlinking [/var/lib/sss/db/ccache_DOMAIN.BU.EDU_O03KMi]
>
> (2021-02-23 11:31:29): [ldap_child[1485203]] [main] (0x0020): ldap_child_get_tgt_sync failed.
>
>
>
>
>
> My /etc/krb5.keytab has a usable key:
>
>
>
> [root@server sssd]# kinit nik
>
> Password for nik(a)DOMAIN.BU.EDU:
>
> [root@server sssd]# klist
>
> Ticket cache: KCM:0
>
> Default principal: nik(a)DOMAIN.BU.EDU
>
>
>
> Valid starting Expires Service principal
>
> 02/23/2021 12:50:18 02/23/2021 22:50:18 krbtgt/DOMAIN.BU.EDU(a)DOMAIN.BU.EDU
>
> renew until 03/02/2021 12:50:15
>
> [root@server sssd]# klist -k
>
> Keytab name: FILE:/etc/krb5.keytab
>
> KVNO Principal
>
> ---- --------------------------------------------------------------------------
>
> 4 server$(a)DOMAIN.BU.EDU
>
> 4 server$(a)DOMAIN.BU.EDU
>
> 4 host/server(a)DOMAIN.BU.EDU
>
> 4 host/server(a)DOMAIN.BU.EDU
>
> 4 host/server.bu.edu(a)DOMAIN.BU.EDU
>
> 4 host/server.bu.edu(a)DOMAIN.BU.EDU
>
> 4 RestrictedKrbHost/server(a)DOMAIN.BU.EDU
>
> 4 RestrictedKrbHost/server(a)DOMAIN.BU.EDU
>
> 4 RestrictedKrbHost/server.bu.edu(a)DOMAIN.BU.EDU
>
> 4 RestrictedKrbHost/server.bu.edu(a)DOMAIN.BU.EDU
>
> [root@server sssd]# kvno 'host/server.bu.edu(a)DOMAIN.BU.EDU'
>
> host/server.bu.edu(a)DOMAIN.BU.EDU: kvno = 4
>
> [root@server sssd]# klist
>
> Ticket cache: KCM:0
>
> Default principal: nik(a)DOMAIN.BU.EDU
>
>
>
> Valid starting Expires Service principal
>
> 02/23/2021 12:50:18 02/23/2021 22:50:18 krbtgt/DOMAIN.BU.EDU(a)DOMAIN.BU.EDU
>
> renew until 03/02/2021 12:50:15
>
> 02/23/2021 12:50:37 02/23/2021 22:50:18 host/server.bu.edu(a)DOMAIN.BU.EDU
>
>
>
>
>
>
>
> When I KRB5_TRACE=/dev/stdout that kvno command then I see that the client uses the TGT to make an authenticated call to get the service ticket. But in SSSD when the ldap_client runs the second time to get the host/server.bu.edu service ticket it makes an unauthenticated call and doesn’t seem to be using the krb5tgt previously returned. Am I missing something about the use of the credential cache (/var/lib/sss/db/ccache_DOMAIN.BU.EDU) for this second call that’s causing things to break?
>
>
>
> I don’t have a good sense of how things should work, and comparing with the working 1.9 shows that there’s no use of the host/server.bu.edu(a)DOMAIN.BU.EDU service ticket at all for password based authentication.
>
>
>
> Does somebody who has this working at the 2.3 level have a good sense of how things should look normally so I can figure out where I’m going off the rails here?
>
>
>
> Thanks.
>
> -nik
>
>
>
>
>
> Nik Conwell | Manager, Systems Engineering
> Boston University Information Services & Technology
> nik(a)bu.edu | 617.353.8274 | bu.edu/tech
>
>
>
> _______________________________________________
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2 years, 9 months
SSSD-AD Password auth at 2.3 level (CentOS 8)?
by Conwell, Nik
Hi all, can anyone offer some insight into how password authentication works with sssd-ad on the 2.3 version (CentOS 8)? It doesn't seem to working as it was under the 1.16. Details below.
We've been running SSSD 1.16 on CentOS7 for a while without issue. But on CentOS 8 at the 2.3 levels we are having issues with AD password auth. Authenticating in with KRB5 works just fine, we're able to realm join, get the keytabs, etc., that all seems reasonable.
The issue with the password auth not working seems to be related to SSSD not being able to get a service ticket for the host/myhost.bu.edu@DOMAIN<mailto:host/myhost.bu.edu@DOMAIN> possibly making an unauthenticated call instead of previously using the krb5tgt in the /var/lib/sss/db ccache?
Cranking up debug I see ldap_child working fine when getting our initial TGT:
(2021-02-23 11:31:29): [ldap_child[1485202]] [main] (0x0400): ldap_child started.
(2021-02-23 11:31:29): [ldap_child[1485202]] [main] (0x2000): context initialized
(2021-02-23 11:31:29): [ldap_child[1485202]] [unpack_buffer] (0x1000): total buffer size: 41
(2021-02-23 11:31:29): [ldap_child[1485202]] [unpack_buffer] (0x1000): realm_str size: 9
(2021-02-23 11:31:29): [ldap_child[1485202]] [unpack_buffer] (0x1000): got realm_str: [DOMAIN.BU.EDU]
(2021-02-23 11:31:29): [ldap_child[1485202]] [unpack_buffer] (0x1000): princ_str size: 8
(2021-02-23 11:31:29): [ldap_child[1485202]] [unpack_buffer] (0x1000): got princ_str: [server]$
(2021-02-23 11:31:29): [ldap_child[1485202]] [unpack_buffer] (0x1000): keytab_name size: 0
(2021-02-23 11:31:29): [ldap_child[1485202]] [unpack_buffer] (0x1000): lifetime: 86400
(2021-02-23 11:31:29): [ldap_child[1485202]] [unpack_buffer] (0x0200): Will run as [0][0].
[...]
(2021-02-23 11:31:29): [ldap_child[1485202]] [main] (0x2000): getting TGT sync
(2021-02-23 11:31:29): [ldap_child[1485202]] [ldap_child_get_tgt_sync] (0x2000): got realm_name: [DOMAIN.BU.EDU]
(2021-02-23 11:31:29): [ldap_child[1485202]] [ldap_child_get_tgt_sync] (0x0100): Principal name is: [server]$(a)DOMAIN.BU.EDU]
(2021-02-23 11:31:29): [ldap_child[1485202]] [ldap_child_get_tgt_sync] (0x0100): Using keytab [MEMORY:/etc/krb5.keytab]
(2021-02-23 11:31:29): [ldap_child[1485202]] [sss_child_krb5_trace_cb] (0x4000): [1485202] 1614097889.649498: Getting initial credentials for [server]$(a)DOMAIN.BU.EDU
(2021-02-23 11:31:29): [ldap_child[1485202]] [sss_child_krb5_trace_cb] (0x4000): [1485202] 1614097889.649499: Looked up etypes in keytab: aes128-cts, aes256-cts
(2021-02-23 11:31:29): [ldap_child[1485202]] [sss_child_krb5_trace_cb] (0x4000): [1485202] 1614097889.649501: Sending unauthenticated request
[...]
(2021-02-23 11:31:29): [ldap_child[1485202]] [sss_child_krb5_trace_cb] (0x4000): [1485202] 1614097889.649507: Response was from master KDC
(2021-02-23 11:31:29): [ldap_child[1485202]] [sss_child_krb5_trace_cb] (0x4000): [1485202] 1614097889.649508: Received error from KDC: -1765328359/Additional pre-authentication required
(2021-02-23 11:31:29): [ldap_child[1485202]] [sss_child_krb5_trace_cb] (0x4000): [1485202] 1614097889.649511: Preauthenticating using KDC method data
(2021-02-23 11:31:29): [ldap_child[1485202]] [sss_child_krb5_trace_cb] (0x4000): [1485202] 1614097889.649512: Processing preauth types: PA-PK-AS-REQ (16), PA-PK-AS-REP_OLD (15), PA-ETYPE-INFO2 (19), PA-ENC-TIMESTAMP (2)
[...]
(2021-02-23 11:31:29): [ldap_child[1485202]] [sss_child_krb5_trace_cb] (0x4000): [1485202] 1614097889.649525: Response was from master KDC
[...]
(2021-02-23 11:31:29): [ldap_child[1485202]] [ldap_child_get_tgt_sync] (0x2000): credentials initialized
(2021-02-23 11:31:29): [ldap_child[1485202]] [ldap_child_get_tgt_sync] (0x2000): keytab ccname: [FILE:/var/lib/sss/db/ccache_DOMAIN.BU.EDU_j0b5Vd]
(2021-02-23 11:31:29): [ldap_child[1485202]] [sss_child_krb5_trace_cb] (0x4000): [1485202] 1614097889.649532: Initializing FILE:/var/lib/sss/db/ccache_DOMAIN.BU.EDU_j0b5Vd with default princ server$(a)DOMAIN.BU.EDU
[...]
(2021-02-23 11:31:29): [ldap_child[1485202]] [ldap_child_get_tgt_sync] (0x2000): credentials stored
(2021-02-23 11:31:29): [ldap_child[1485202]] [ldap_child_get_tgt_sync] (0x2000): Got KDC time offset
(2021-02-23 11:31:29): [ldap_child[1485202]] [ldap_child_get_tgt_sync] (0x2000): Renaming [/var/lib/sss/db/ccache_DOMAIN.BU.EDU_j0b5Vd] to [/var/lib/sss/db/ccache_DOMAIN.BU.EDU]
[...]
(2021-02-23 11:31:29): [ldap_child[1485202]] [pack_buffer] (0x1000): result [0] krberr [0] msgsize [37] msg [FILE:/var/lib/sss/db/ccache_DOMAIN.BU.EDU]
(2021-02-23 11:31:29): [ldap_child[1485202]] [main] (0x0400): ldap_child completed successfully
But then right after I see ldap_child being called to get a host ticket:
(2021-02-23 11:31:29): [ldap_child[1485203]] [main] (0x0400): ldap_child started.
(2021-02-23 11:31:29): [ldap_child[1485203]] [main] (0x2000): context initialized
(2021-02-23 11:31:29): [ldap_child[1485203]] [unpack_buffer] (0x1000): total buffer size: 52
(2021-02-23 11:31:29): [ldap_child[1485203]] [unpack_buffer] (0x1000): realm_str size: 9
(2021-02-23 11:31:29): [ldap_child[1485203]] [unpack_buffer] (0x1000): got realm_str: DOMAIN.BU.EDU
(2021-02-23 11:31:29): [ldap_child[1485203]] [unpack_buffer] (0x1000): princ_str size: 19
(2021-02-23 11:31:29): [ldap_child[1485203]] [unpack_buffer] (0x1000): got princ_str: host/server.bu.edu
(2021-02-23 11:31:29): [ldap_child[1485203]] [unpack_buffer] (0x1000): keytab_name size: 0
(2021-02-23 11:31:29): [ldap_child[1485203]] [unpack_buffer] (0x1000): lifetime: 86400
(2021-02-23 11:31:29): [ldap_child[1485203]] [unpack_buffer] (0x0200): Will run as [0][0].
(2021-02-23 11:31:29): [ldap_child[1485203]] [privileged_krb5_setup] (0x2000): Kerberos context initialized
(2021-02-23 11:31:29): [ldap_child[1485203]] [main] (0x2000): Kerberos context initialized
(2021-02-23 11:31:29): [ldap_child[1485203]] [become_user] (0x0200): Trying to become user [0][0].
(2021-02-23 11:31:29): [ldap_child[1485203]] [become_user] (0x0200): Already user [0].
(2021-02-23 11:31:29): [ldap_child[1485203]] [main] (0x2000): Running as [0][0].
(2021-02-23 11:31:29): [ldap_child[1485203]] [main] (0x2000): getting TGT sync
(2021-02-23 11:31:29): [ldap_child[1485203]] [ldap_child_get_tgt_sync] (0x2000): got realm_name: [DOMAIN.BU.EDU]
(2021-02-23 11:31:29): [ldap_child[1485203]] [ldap_child_get_tgt_sync] (0x0100): Principal name is: [host/server.bu.edu(a)DOMAIN.BU.EDU]
(2021-02-23 11:31:29): [ldap_child[1485203]] [ldap_child_get_tgt_sync] (0x0100): Using keytab [MEMORY:/etc/krb5.keytab]
(2021-02-23 11:31:29): [ldap_child[1485203]] [sss_child_krb5_trace_cb] (0x4000): [1485203] 1614097889.687429: Getting initial credentials for host/server.bu.edu(a)DOMAIN.BU.EDU
(2021-02-23 11:31:29): [ldap_child[1485203]] [sss_child_krb5_trace_cb] (0x4000): [1485203] 1614097889.687430: Looked up etypes in keytab: aes128-cts, aes256-cts
(2021-02-23 11:31:29): [ldap_child[1485203]] [sss_child_krb5_trace_cb] (0x4000): [1485203] 1614097889.687432: Sending unauthenticated request
(2021-02-23 11:31:29): [ldap_child[1485203]] [sss_child_krb5_trace_cb] (0x4000): [1485203] 1614097889.687433: Sending request (213 bytes) to DOMAIN.BU.EDU
(2021-02-23 11:31:29): [ldap_child[1485203]] [sss_child_krb5_trace_cb] (0x4000): [1485203] 1614097889.687434: Initiating TCP connection to stream [IP]:88
(2021-02-23 11:31:29): [ldap_child[1485203]] [sss_child_krb5_trace_cb] (0x4000): [1485203] 1614097889.687435: Sending TCP request to stream [IP]:88
(2021-02-23 11:31:29): [ldap_child[1485203]] [sss_child_krb5_trace_cb] (0x4000): [1485203] 1614097889.687436: Received answer (90 bytes) from stream [IP]:88
(2021-02-23 11:31:29): [ldap_child[1485203]] [sss_child_krb5_trace_cb] (0x4000): [1485203] 1614097889.687437: Terminating TCP connection to stream [IP]:88
(2021-02-23 11:31:29): [ldap_child[1485203]] [sss_child_krb5_trace_cb] (0x4000): [1485203] 1614097889.687438: Response was from master KDC
(2021-02-23 11:31:29): [ldap_child[1485203]] [sss_child_krb5_trace_cb] (0x4000): [1485203] 1614097889.687439: Received error from KDC: -1765328378/Client not found in Kerberos database
(2021-02-23 11:31:29): [ldap_child[1485203]] [ldap_child_get_tgt_sync] (0x0040): krb5_get_init_creds_keytab() failed: -1765328378
(2021-02-23 11:31:29): [ldap_child[1485203]] [ldap_child_get_tgt_sync] (0x0010): Failed to initialize credentials using keytab [MEMORY:/etc/krb5.keytab]: Client 'host/server.bu.edu(a)DOMAIN.BU.EDU' not found in Kerberos database. Unable to create GSSAPI-encrypted LDAP connection.
(2021-02-23 11:31:29): [ldap_child[1485203]] [unique_filename_destructor] (0x2000): Unlinking [/var/lib/sss/db/ccache_DOMAIN.BU.EDU_O03KMi]
(2021-02-23 11:31:29): [ldap_child[1485203]] [main] (0x0020): ldap_child_get_tgt_sync failed.
My /etc/krb5.keytab has a usable key:
[root@server sssd]# kinit nik
Password for nik(a)DOMAIN.BU.EDU:
[root@server sssd]# klist
Ticket cache: KCM:0
Default principal: nik(a)DOMAIN.BU.EDU
Valid starting Expires Service principal
02/23/2021 12:50:18 02/23/2021 22:50:18 krbtgt/DOMAIN.BU.EDU(a)DOMAIN.BU.EDU
renew until 03/02/2021 12:50:15
[root@server sssd]# klist -k
Keytab name: FILE:/etc/krb5.keytab
KVNO Principal
---- --------------------------------------------------------------------------
4 server$(a)DOMAIN.BU.EDU
4 server$(a)DOMAIN.BU.EDU
4 host/server(a)DOMAIN.BU.EDU
4 host/server(a)DOMAIN.BU.EDU
4 host/server.bu.edu(a)DOMAIN.BU.EDU
4 host/server.bu.edu(a)DOMAIN.BU.EDU
4 RestrictedKrbHost/server(a)DOMAIN.BU.EDU
4 RestrictedKrbHost/server(a)DOMAIN.BU.EDU
4 RestrictedKrbHost/server.bu.edu(a)DOMAIN.BU.EDU
4 RestrictedKrbHost/server.bu.edu(a)DOMAIN.BU.EDU
[root@server sssd]# kvno 'host/server.bu.edu(a)DOMAIN.BU.EDU'
host/server.bu.edu(a)DOMAIN.BU.EDU: kvno = 4
[root@server sssd]# klist
Ticket cache: KCM:0
Default principal: nik(a)DOMAIN.BU.EDU
Valid starting Expires Service principal
02/23/2021 12:50:18 02/23/2021 22:50:18 krbtgt/DOMAIN.BU.EDU(a)DOMAIN.BU.EDU
renew until 03/02/2021 12:50:15
02/23/2021 12:50:37 02/23/2021 22:50:18 host/server.bu.edu(a)DOMAIN.BU.EDU<mailto:host/niktest.bu.edu@AD.BU.EDU>
When I KRB5_TRACE=/dev/stdout that kvno command then I see that the client uses the TGT to make an authenticated call to get the service ticket. But in SSSD when the ldap_client runs the second time to get the host/server.bu.edu service ticket it makes an unauthenticated call and doesn't seem to be using the krb5tgt previously returned. Am I missing something about the use of the credential cache (/var/lib/sss/db/ccache_DOMAIN.BU.EDU) for this second call that's causing things to break?
I don't have a good sense of how things should work, and comparing with the working 1.9 shows that there's no use of the host/server.bu.edu(a)DOMAIN.BU.EDU<mailto:host/server.bu.edu@DOMAIN.BU.EDU> service ticket at all for password based authentication.
Does somebody who has this working at the 2.3 level have a good sense of how things should look normally so I can figure out where I'm going off the rails here?
Thanks.
-nik
Nik Conwell | Manager, Systems Engineering
Boston University Information Services & Technology
nik(a)bu.edu<mailto:nik@bu.edu> | 617.353.8274 | bu.edu/tech<http://www.bu.edu/tech>
2 years, 9 months
session unlock with smartcard stops working when updating shared library
by Winberg Adam
We're using a third party shared library for communication with our smartcards, using RHEL 8.3. SSSD uses p11 to communicate with the cards, this works fine.
But, when I update the third party lib file to a new version, I can no longer unlock my Gnome session with the smart card. Debug logs shows the following in p11_child.log:
(2021-02-22 7:55:07): [p11_child[3059726]] [main] (0x0010): --module_name, --token_name and --key_id must be given for authentication
(2021-02-22 7:55:07): [p11_child[3059726]] [main] (0x0020): p11_child failed!
And in sssd_pam.log:
(2021-02-22 7:55:07): [pam] [parse_p11_child_response] (0x1000): No certificate found.
(2021-02-22 7:55:07): [pam] [pam_forwarder_cert_cb] (0x0020): No certificate returned, authentication failed.
I can use the smartcard for other actions, like sudo and logging in to a new session, but not to unlock the existing session. It's like some session specific data no longer is available or no longer matches when the lib file has changed on disk.
This makes it really hard to update the lib file on our users computers, seeing as doing so will effectively lock them out of their sessions. Does anyone recognize this behaviour and is there anything I can do to avoid it?
Regards
Adam Winberg
2 years, 9 months
