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



 
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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This e-mail message and any attachments thereto, is intended only for use by the addressee(s) named herein and may contain legally privileged and/or confidential information. If you are not the intended recipient of this e-mail message, you are hereby notified that any dissemination, distribution or copying of this e-mail message, and any attachments thereto, is strictly prohibited.  If you have received this e-mail message in error, please immediately notify the sender and permanently delete the original and any copies of this email and any prints thereof.
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.