Subject: Re: Help with authz-regexp mapping kerberos identity to dn --RAHUL

["Chavez, James R." <james.chavez@sanmina-sci.com>]

Rahul,
My friend finally a response.
Thank you for the input I had also read that link you provided, it was
somewhat helpful. If the usernames were identical that would work great
I believe. However the source name is coming in as joe_montana and I
need it to map to jmontana.
So I need only the first character of the first name and everything
after the underscore (last name). I am looking for the expression that
would give me that. I am not too familiar with the expressions syntax or
how to manipulate them. I see there is an option to search ldap using
ldap:///ou=people,dc=example,dc=com??one?(uid=$1), maybe I should look
into that. Do you have any suggestions or source for reading on
authz-regexp? I have been looking. If it was shell scripting I could
manage another way. 

When you say the SASL Realm would that go in the main slapd.conf or the
/usr/lib/sasl2/slapd.conf?

I am indeed using GSSAPI for the SASL-auth-mechanism. I am getting
close,just gotta get past this. :)

Thank you again.
James




------------------------------

Message: 2
Date: Mon, 11 Aug 2008 17:54:02 +0530
From: Rahul Amaram <rahul@synovel.com>
Subject: Re: Help with authz-regexp mapping kerberos identity to dn
	....SASL
To: openldap-technical@openldap.org
Message-ID: <48A02F62.1000305@synovel.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Hi Chavez,
This is the authz-regexp string I have used in slapd.conf:

authz-regexp uid=([^,]*),cn=synovel.com,cn=gssapi,cn=auth
uid=$1,ou=People,dc=synovel,dc=com

This works if the SASL auth mechanism is gssapi. I have also hard-coded
the SASL Realm with the below config option:

sasl-realm SYNOVEL.COM

If it uses the default realm (i.e. sasl-realm option is missing) then
the string would probably be:

authz-regexp uid=([^,]*),cn=gssapi,cn=auth
uid=$1,ou=People,dc=synovel,dc=com


Hope this is of some assistance. For furthur information, kindly read 
http://www.openldap.org/doc/admin24/sasl.html#Mapping%20Authentication%2
0Identities 
.

Regards,
Rahul.

Chavez, James R. wrote:
> Hello all,
> My plan is to use Kerberos and LDAP as a replacement for NIS.
> My issue is that I need my kerberos credentials to map to a user in
LDAP
> so I can avoid permission issues when logging in with kerberos creds.
> All the perms are based on the UNIX/LDAP users and groups. Thing is
the
> user id's are different between kerberos and LDAP.
> The kerberos names consist of firstname_lastname@REALM. The ldap
entries
> are in the format of standard Unix user names or first letter of first
> name and up to 7 characters of the last name (jmontana). I migrated
the
> LDAP entries from my existing NIS maps.
> Now I understand that I can use SASL and authz-regexp in slapd.conf to
> map these id's. Please correct me if I am wrong.
>
> I added all the corresponding  "krbName: first_last@REALM" to the
users
> when I added them to the LDAP directory.
> For example for user Joe Montana..His ldap dn is "dn:
> uid=jmontana,ou=People,dc=test,dc=example,dc=com"
> His uid is "uid: jmontana
> And his Krb name is ""krbName: joe_montana@TEST.EXAMPLE.COM"
>
> I think all the data is there to get a mapping I just am unsure of the
> auth-regexp strings I need to add to the slapd.conf file.
> Does anyone out there have any experience with this and better yet
> provide the string or example of what strings I can use?
> I have searched the net on how to authenticate with kerberos and
> effictively login with a local id but have been unsuccessful in my
> search.
> Appreciate any help.
>
> Thank You
> James
>
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ABSENT AN EXPRESS STATEMENT TO THE CONTRARY HEREINABOVE, THIS E-MAIL IS NOT INTENDED AS A SUBSTITUTE FOR A WRITING.  Notwithstanding the Uniform Electronic Transactions Act or the applicability of any other law of similar substance and effect, absent an express statement to the contrary hereinabove, this e-mail message its contents, and any attachments hereto are not intended to represent an offer or acceptance to enter into a contract and are not otherwise intended to bind the sender, Sanmina-SCI Corporation (or any of its subsidiaries), or any other person or entity.