ejabberd - Comments for "Problem with ldap_dn_filter"

Ok, I have done a lot of

madmalkav — Tue, 27 Feb 2018 13:20:23 +0000

Ok, I have done a lot of progress today, thanks mainly to Airwave and emias on the IRC channel.

ldap_dn_filter parsing issues:

With:

ldap_dn_filter: "(&(cn=XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX)(uniqueMember=%D))":["uid"]

ldap_dn_filter: "(&(cn=XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX)(uniqueMember=%D))": ["uid"]

Error:

2018-02-26 13:56:17.636 [error] <0.66.0>@ejabberd_config:get_plain_terms_file:286 Cannot load /users/ejb00/ejb/conf/ejabberd.yml: Syntax error on line 267 at position 82: did not find expected key

With:

ldap_dn_filter:
  "(&(cn=XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX)(uniqueMember=%D))"

Error:

2018-02-26 14:19:18.879 [error] <0.66.0>@ejabberd_config:validate_opts:1029 ignoring option 'ldap_dn_filter' with invalid value: <<"(&(cn=XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX)(uniqueMember=%D))">>

With:

ldap_dn_filter:
  "(&(cn=XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX)(uniqueMember=%D))": ["uid"]

SUCCESS

This is the proper format: new line, two spaces, no '-'. The second part -after the ":"- is mandatory: this is the parameter of the first query results that will be used for parsing purposes with %s. Even if you are not usin %s, you should set it up.

If I left ldap_filter blank, all the o=XXXXXXXX uids get queried, and the Virtual Domain tab doesn't get populated. I suppose this behaviour is caused if the LDAP server reply is truncated, i.e. it is set to send a maximum of 2000 results but the query results are bigger than that.

If I filter a little more in the first query, we get the Virtual Domain user list populated. This can be a problem in big organizations, and it will be interesting to confirm if the behaviour is caused by the LDAP config or ejabberd.

To filter by netgroup users with nisNetgroupTriple , there is a problem parsing the ( ) characters. I'm still trying how to figure that out, meanwhile you could use wildcards, but I don't like that from a security point of view.

Also, in my LDAP uid is uppercase and the entry in nisNetgroupTriple is lowercase, so I had to search of a user property that holds the user in lowercase and use that with %s:

"(&(cn=XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX)(nisNetgroupTriple=*%s*))": ["uidux"]

I start to think

madmalkav — Mon, 26 Feb 2018 11:24:09 +0000

I start to think ldap_dn_filter is not working OK. With this configuration:

ldap_uids:
- "uniqueMember"
ldap_filter: "(cn=GROUPNAME)"
ldap_dn_filter: "(%s)": "uniqueMember"

I get:

2018-02-26 11:34:28.698 [error] <0.66.0>@ejabberd_config:get_plain_terms_file:286 Cannot load /users/ejb00/ejb/conf/ejabberd.yml: Syntax error on line 267 at position 23: mapping values are not allowed in this context

Or, I can try with the netgroups:

ldap_uids:
- "nisNetgroupTriple": "(,%u,)"
ldap_filter: "(cn=NETGROUP)"
ldap_dn_filter: "(uid=%u)"

But then I don't get the LDAP query in the log, and I get:

2018-02-26 12:03:41.166 [error] <0.66.0>@ejabberd_config:validate_opts:1029 ignoring option 'ldap_dn_filter' with invalid value: <<"(uid=%u)">>

I get the query in the log if I remove the : "(,%u,)"::

2018-02-26 12:20:22.102 [debug] <0.562.0>@eldap:send_command:776 {searchRequest,{'SearchRequest',<<"o=XXXXXXXX">>,wholeSubtree,neverDerefAliases,0,0,false,{and,[{equalityMatch,{'AttributeValueAssertion',<<"nisNetgroupTriple">>,<<"USERID">>}},{equalityMatch,{'AttributeValueAssertion',<<"cn">>,<<"NETGROUP">>}}]},[<<"nisNetgroupTriple">>]}}

OK, after a good night of

madmalkav — Sat, 24 Feb 2018 12:01:00 +0000

OK, after a good night of sleep, now I understand why the second option can't work. What I need is probably take the results of ldap_filter , like i.e. the list of nisNetgroupTriple , and feed then to ldap_dn_filter, but parsed somehow. Something like:

(uid=%u): ["nisNetgroupTriple": "(,%u,)"]

But I don't think that is supported.

I also still get the "ignoring option 'ldap_dn_filter' with invalid value" error with different ldap_dn_filter I have tried.

There is other way I can try

madmalkav — Fri, 23 Feb 2018 18:51:15 +0000

There is other way I can try to get this working on my LDAP, with ladp_uids. but this is showing some problems:

If, for example, I filter using a netgroup, I get a list of users in the format:

nisNetgroupTriple: (,USERID,)

But if I setup in my ejabberd.yml file:

ldap_uids:
- "nisNetgroupTriple": "(,%u,)"

This still doesn't work.

The other possibilty is using ldap_uids with the previously mentiones uniqueMember entries, but those are in the format:

USER NAME AND SURNAME - USERID,ou=XXXXXXXX,o=XXXXXXXX

I don't know how the ldap_uidattr_format format is parsed, so I don't know if I can use, i.e., a regular expression to get the USERID from that field.