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From "Lars Francke (Jira)" <j...@apache.org>
Subject [jira] [Created] (RANGER-2705) Group sync does not respect ldap.user.nameattribute
Date Mon, 20 Jan 2020 15:24:00 GMT
Lars Francke created RANGER-2705:
------------------------------------

             Summary: Group sync does not respect ldap.user.nameattribute
                 Key: RANGER-2705
                 URL: https://issues.apache.org/jira/browse/RANGER-2705
             Project: Ranger
          Issue Type: Bug
          Components: usersync
            Reporter: Lars Francke


When we have enabled user & group search ({{ranger.usersync.group.search.first.enabled}}
= false) we expect Ranger to get the groups and its members and compare them to what already
exists.

Unfortunately, we have set the user.nameattribute to the usual sAMAccountName which returns
something along the lines of "AB12" for us (user Ids). The members' list that is returned
from the groups, however, includes a full DN for each member:

 
{code:java}
 CN=Francke\, Lars,OU=....bla bla. 
{code}
 

There are two problems here:

1. Our CN contains a comma but the {{getShortUserName}} method in {{LdapDeltaUserGroupBuilder}}
has this piece of code:

 
{code:java}
StringTokenizer stc = new StringTokenizer(longUserName, ",");
String firstToken = stc.nextToken();{code}
The intention is that it gets the "{{CN=Francke\, Lars}}" part (the first part of the comma
separated DN) but that doesn't work if that contains a comma itself. It is escaped but Ranger
just splits at the comma. That's definitely a bug.

 

2. Even if 1. would work there is no user "Francke, Lars" in Ranger. Ranger would need to
use that DN to look up the user and then apply the {{user.nameattribute}} to match it to existing
users.

This way we currently cannot use group sync at all because if we do we don't get any groups
at all as the user search doesn't take its own groups when group sync is also enabled (this
was another surprise).

 

 

 

This is made much harder by being all completely underdocumented ;)

I guess it'd make sense to create two issues for this and I can do that tomorrow.

 



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