https://bz.apache.org/bugzilla/show_bug.cgi?id=64222
Bug ID: 64222
Summary: Getting User from SSO using SPNEGO returns Tomcat
Linux user instead of Windows user above Tomcat9.0.8
Product: Tomcat 9
Version: 9.0.22
Hardware: PC
OS: Linux
Status: NEW
Severity: regression
Priority: P2
Component: Catalina
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: -----
I had the same problem already described in
http://tomcat.10.x6.nabble.com/SSO-fails-on-Tomcat-9-td5089051.html#a5089145 :
When upgrading from Tomcat8.5.20 to Tomcat9.0.22 calling
request.getRemoteUser() in a JSP (like the hello_spnego.jsp file as mentioned
in http://spnego.sourceforge.net/spnego_tomcat.html) of the ROOT webapp with
identically configured SPNEGO (using a SpnegoHttpFilter in the web.xml) did not
return the Windows-User of the Browser sending the request transferring the
Kerberos-Ticket (bk), but the linux user the Tomcat is running under (tomcat).
Additional note: request.getUserPrincipal().getName() returns [email protected]
instead of [email protected].
After downgrading from 9.0.22 to 9.0.8 it worked all fine like with 8.5.20!
So I suppose the new line 541 doing return null; causes this behaviour:
https://github.com/apache/tomcat/commit/b5ca3e08b8cdd998e22f486293bca6b89e2644e3
But I must admit without debugging I do not understand the code of
JAASRealm.createPrinicpal() that seems to be involved in this regression.
Using a AuthenticatedUserRealm did not work either (but in fact no Valve or
Realm is configured in TOMCAT_BASE/conf/server.xml at all - it is unchanged).
So in the meantime more information about my system to reproduce:
* Ubuntu 16.04.4 LTS
* with the mentioned Apache 8.5.20, 9.0.8 and 9.0.22
* SPNEGO configured with a SpnegoHttpFilter in the TOMCAT_BASE/conf/web.xml
like documented in http://spnego.sourceforge.net/spnego_tomcat.html
** copied the latest spnego-r9.jar to the TOMCAT_BASE/lib folder and
** configured with a conf/krb5.ini, a conf/jaas.conf and a conf/tomcat.keytab
matching the setspn command at the domain controller as documented in
https://tomcat.apache.org/tomcat-9.0-doc/windows-auth-howto.html#Tomcat_instance_(Linux_server)
If necessary I can provide the configuration files, but I think it is
reproducible without.
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