Rahul,
Thank you again..I will try this expression you have provided.
Am I going about this in the correct way? What I want is to login
through ssh or even the local box and be authenticated by the kerberos
credentials. But I want the effective uid or account to be that of the
ldap user in the openldap directory.
I want my kerberos credentials to authorize my ldap login even though
the account names do not match. Is it possible with this authz-regexp?
Or is this simply for services.
Sorry for all the questions.
Thanks
James
Message: 1
Date: Wed, 13 Aug 2008 15:08:43 +0530
From: Rahul Amaram <rahul@synovel.com>
Subject: Re: Subject: Re: Help with authz-regexp mapping kerberos
identity to dn --RAHUL
Cc: openldap-technical@openldap.org
Message-ID: <48A2ABA3.9090900@synovel.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Hi Chavez,
Try this expression. It should work.
authz-regexp uid=(.).*_([^,]*),cn=company.com,cn=gssapi,cn=auth
uid=$1$2,ou=People,dc=company,dc=com
The "sasl-realm" parameter is set in /etc/slapd/slapd.conf (main
slapd.conf file). You might also be interested in sasl-host (for
hard-coding the host sasl fqdn name to be used while fetching
ldap/<fqdn>@<REALM> password from the keytab file) and sasl-secprops
parameters.
Regards,
Rahul.
Chavez, James R. wrote:
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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