[Date Prev][Date Next] [Chronological] [Thread] [Top]

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

 
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

CONFIDENTIALITY
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.