[keycloak-user] Keycloak single sign on with Keberos(AD)
Marek Posolda
mposolda at redhat.com
Thu Jun 30 05:14:15 EDT 2016
||Adding list back again for tracking (Ray, please use "Reply all" when
reply to the mails).
From my googling, it seems that DefectiveTokenDetected can happen for
NTLM requests as well. Btv. I found some tips on StackOverflow how to
prevent use NTLM instead of Kerberos5
http://stackoverflow.com/questions/2973355/defective-token-deteced-error-ntlm-not-kerberos-with-kerberos-spring-securit
. Maybe something from those will help:
- Use different machines for client (browser) and keycloak server
- Ensure both machines are in windows domain
- Use some different encryptions in kerberos client file. ( krb5.ini )
file. The post mentions "arcfour-hmac-md5" however the post is 6 years
old :) Still it might help to add/remove some encryptions from krb5.ini
file and check if client machine and IE will use krb5 ticket instead of NTLM
- Fix DNS records or "SPN records" (I don't have a clue what it is :) So
see post for more details)
Marek
On 29/06/16 16:41, Zhou, Limin (Ray) wrote:
>
> Marek
>
> I sent you two log files yesterday via two emails, I am able to see
> your analysis(such OID etc.) from the first log, but not the second
> logs, in the second log we were getting GSSException instead of the
> hand shake message, I am wondering why it likes this, and are they
> the same thing regarding my issues?
>
> Sorry to disturb you again
>
> Raymond
>
> P.S I have attached the two logs again for you to reference
>
> *From:*Zhou, Limin (Ray)
> *Sent:* Wednesday, June 29, 2016 10:18 AM
> *To:* 'Marek Posolda'
> *Subject:* RE: [keycloak-user] Keycloak single sign on with Keberos(AD)
>
> Marek
>
> Thank you so much for your analysis, I am wondering whether you can
> tell me how you mapped your diagnose with the server.log line#? I
> think this will help us more when we tuning either our bowser and
> domain setting, because I cannot see any 401 heading, first OID, the
> KRB5 OLD from the log file
>
> Really appreciate your help
>
> Raymond
>
> *From:*Marek Posolda [mailto:mposolda at redhat.com]
> *Sent:* Wednesday, June 29, 2016 4:01 AM
> *To:* Zhou, Limin (Ray)
> *Cc:* keycloak-user at lists.jboss.org <mailto:keycloak-user at lists.jboss.org>
> *Subject:* Re: [keycloak-user] Keycloak single sign on with Keberos(AD)
>
> Hi Raymond,
>
> returning keycloak-user list back for tracking purposes.
>
> What I can see in the server.log is happening is that:
> - Keycloak ask browser to send SPNEGO token (by sending 401 with
> "WWW-Authenticate: Negotiate" header). So far everything as expected
> - Browser replies with SPNEGO token, however it uses NTLM as the
> preferred choice ( First OID is 1.3.6.1.4.1.311.2.2.10 ) together with
> NTLM token. The KRB5 OID ( 1.2.840.113554.1.2.2 ) is in the supported
> mechanisms too.
> - Keycloak replies with NegTokenTarg token when it's asking for
> sending SPNEGO token backed by KRB5 instead of NTLM (as Keycloak
> doesn't understant NTLM atm. There is related discussion on
> keycloak-user
> http://lists.jboss.org/pipermail/keycloak-user/2016-June/006758.html )
> - Browser doesn't respond to NegTokenTarg with SPNEGO+KRB5 token anymore
>
> Not sure what are your possibilities TBH. Either somehow setup browser
> to reply to second request with NegTokenTarg and send SPNEGO+KRB5
> token. Or re-configure your Windows domain (or client machines +
> browser) to skip using NTLM. Right now, I don't have any clue how to
> do that TBH.
>
> Marek
>
> On 28/06/16 21:58, Zhou, Limin (Ray) wrote:
>
> Hi Marek
>
> If you haven’t looked at my previous server.log, then use this one
> instead, in this log we were getting an exception
>
> *GSSException: Defective token detected (Mechanism level:
> GSSHeader did not find the right tag)*
>
> When we hit the url, maybe this will make things easier
>
> Please let me know if you need anything more
>
> Thanks a lot
>
> Raymond
>
> *From:*Zhou, Limin (Ray)
> *Sent:* Tuesday, June 28, 2016 10:00 AM
> *To:* 'Marek Posolda'
> *Subject:* RE: [keycloak-user] Keycloak single sign on with
> Keberos(AD)
>
> Hi Marek
>
> I have attached my keycloak server log to you, after adding the
> two properties, we can see an exception shows up when I hitting
> my url, after the exception, I think the default keycloak login
> page shows up, and rest of the log were generated by my manual login
>
> Hope this can give us some clue
>
> Thanks a lot
>
> Raymond
>
> *From:*Marek Posolda [mailto:mposolda at redhat.com]
> *Sent:* Tuesday, June 28, 2016 1:43 AM
> *To:* Zhou, Limin (Ray)
> *Subject:* Re: [keycloak-user] Keycloak single sign on with
> Keberos(AD)
>
> Thanks Raymond,
>
> is it possible to also enable the system properties
> |-Dsun.security.krb5.debug=true| and
> |-Dsun.security.spnego.debug=true and see if there are some more
> details in the log? You can add system properties either directly
> to standalone/configuration/standalone.xml file or by adding them
> to java opts in bin/standalone.conf|
>
> |Thanks,|
> |Marek|
>
> On 27/06/16 23:18, Zhou, Limin (Ray) wrote:
>
> Hello Marek
>
> Thanks for answering my post, following are the log piece
> after hitting the first page, hope this helps.
>
> Please let me know if you need anything more
>
> Thank you so much
>
> Raymond
>
> 2016-06-27 17:11:13,453 INFO [stdout] (default task-24) Debug
> is true storeKey true useTicketCache false useKeyTab true
> doNotPrompt true ticketCache is null isInitiator false KeyTab
> is C:\FIRMS-domain\kcsso.keytab refreshKrb5Config is false
> principal is
> HTTP/t430-pbdc41e.monad.moneris.com at MONAD.MONERIS.COM
> <mailto:HTTP/t430-pbdc41e.monad.moneris.com at MONAD.MONERIS.COM>
> tryFirstPass is false useFirstPass is false storePass is false
> clearPass is false
>
> 2016-06-27 17:11:13,453 INFO [stdout] (default task-24)
> principal is
> HTTP/t430-pbdc41e.monad.moneris.com at MONAD.MONERIS.COM
> <mailto:HTTP/t430-pbdc41e.monad.moneris.com at MONAD.MONERIS.COM>
>
> 2016-06-27 17:11:13,453 INFO [stdout] (default task-24) Will
> use keytab
>
> 2016-06-27 17:11:13,453 INFO [stdout] (default task-24)
> Commit Succeeded
>
> 2016-06-27 17:11:13,453 INFO [stdout] (default task-24)
>
> 2016-06-27 17:11:13,454 INFO [stdout] (default task-24)
> [Krb5LoginModule]: Entering logout
>
> 2016-06-27 17:11:13,454 INFO [stdout] (default task-24)
> [Krb5LoginModule]: logged out
> Subject
>
> *From:*Marek Posolda [mailto:mposolda at redhat.com]
> *Sent:* Monday, June 27, 2016 5:55 AM
> *To:* Zhou, Limin (Ray); keycloak-user at lists.jboss.org
> <mailto:keycloak-user at lists.jboss.org>
> *Subject:* Re: [keycloak-user] Keycloak single sign on with
> Keberos(AD)
>
> It may help if you enable all the possible debug/trace logging
> and post the log here. This may give more info what is the
> issue. See docs how to enable logging :
> https://keycloak.gitbooks.io/server-adminstration-guide/content/v/2.0/topics/authentication/kerberos.html
>
> Try to send the log from the point once you trigger the
> authentication request (or from the point when you hit your
> app URL)
>
> Thanks,
> Marek
>
> On 24/06/16 20:22, Zhou, Limin (Ray) wrote:
>
> Hello everyone
>
> I am new to Keycloak and new to here
>
> Our web application is running on Jboss EAP 7, We have
> configured KeyCloak standalone server 1.9.7 running on
> different port(same server box) to manage the user
> authentication and authorization, behind KeyCloak we have
> configured Keberos in User Federation to talk our company
> AD server, we are able to login by using our AD account,
> but not in single sign on way, each time when we hitting
> the our app URL, the Keycloak login page will show up.
>
> It looks like the TGT or ST hand shake was not successful,
> is there any document I can reference it to debug the issue?
>
> Any comments or suggestion would be very welcome
>
> thanks in advance
>
> raymond
>
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