Thanks for the reply

It is used as far as sasldb2 is populated as appropriate; please refer to Cyrus SASL documentation for instructions about populating it.

Do you mean http://www.sendmail.org/~ca/email/cyrus/sysadmin.html? I've crawled around the CMU web site, and have Google'd , and haven't seen anything better than this. And, it refers to the older sasldb, not sasldb2.

As soon as you get to authz-regexp mapping, credential are being looked up in the directory. Is "uid=tlemons" a valid DN in your DIT? I mean: does it resolve to an existing entry?

Yes.

Thanks! tl

lemons_terry@emc.com wrote:

Thanks, as ever, for the help, Kyle.

I started slapd in debug mode. When I executed the command you suggested, I see:

ldap_err2string <= ldap_dn2bv(uid=root,cn=digest-md5,cn=auth)=0 Success <<< dnNormalize: <uid=root,cn=digest-md5,cn=auth> ==>slap_sasl2dn: converting SASL name uid=root,cn=digest-md5,cn=auth to a DN slap_sasl_regexp: converting SASL name uid=root,cn=digest-md5,cn=auth <==slap_sasl2dn: Converted SASL name to <nothing> SASL [conn=12] Failure: no secret in database

So, the good news is that "uid=root,cn=digest-md5,cn=auth" does look correct. But I then see "Converted SASL name to <nothing>". Here are the final lines in my /etc/openldap/slapd.conf:

# SASL options password-hash {cleartext} authz-regexp uid=(.*),cn=tivo2.backup,cn=digest-md5,cn=auth uid=tlemons authz-regexp uid=(.*),cn=digest-md5,cn=auth uid=tlemons tivo2:~ #

I thought that the first authz-regexp line would have mapped any account to uid-tlemons, but this apparently didn't happen.

The important thing to note here is that the SASL library is omitting the realm name, which is its normal behavior when using the default realm.

Also, "uid=tlemons" is a pretty short DN. It seems to me you're missing some things, unless you happen to be using a very very small test database.

Also, when is the information in sasldb2 used? It looks to me like it isn't, and that authentication is occurring against entries that should be in the LDAP database itself?

The SASL library tries all available information sources. If there was a "root" user record in your sasldb2 file it would have been used. Since your sasldblistusers2 output shows "root@tivo2" I'd say you have the wrong realm info in your database, as that doesn't match either "root" or "root@tivo2.backup".

Thanks tl

-----Original Message----- From: openldap-software-bounces+lemons_terry=emc.com@openldap.org [mailto:openldap-software-bounces+lemons_terry=emc.com@openldap.org] On Behalf Of Chapman, Kyle Sent: Monday, April 02, 2007 11:42 AM To: openldap-software@openldap.org Subject: RE: DIGEST-MD5 returns 'user not found'

Does: Ldapsearch -y digest-md5 -U root -R tivo2 -W

Show anything diff. I havent used sasldb2 stuff in a while, however with digestmd5 when secrets are stored in the ldap dit, had to be clear text.

-----Original Message----- From: openldap-software-bounces+kyle_chapman=g1.com@OpenLDAP.org [mailto:openldap-software-bounces+kyle_chapman=g1.com@OpenLDAP.org] On Behalf Of lemons_terry@emc.com Sent: Monday, April 02, 2007 10:36 AM To: openldap-software@openldap.org Subject: DIGEST-MD5 returns 'user not found'

Hi

I'm trying to use DIGEST-MD5 authentication on a SLES 9 SP3 system running OpenLDAP 2.

tivo2:~ # ldapsearch SASL/DIGEST-MD5 authentication started Please enter your password: ldap_sasl_interactive_bind_s: Internal (implementation specific) error (80) additional info: SASL(-13): user not found: no secret in database

When I run 'ldapsearch -d 2', I see that 'username=root' and 'realm=tivo2.backup'.

I believe that I have the correct entry for 'root' in the SASL database:

sasldblistusers2 root@tivo2: userPassword

So why is SASL saying 'user not found'?

Thanks tl

Terry Lemons Backup Platforms Group EMC² where information lives 4400 Computer Drive, MS D239 Westboro MA 01580 Phone: 508 898 7312 Email: Lemons_Terry@emc.com

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lemons_terry@emc.com wrote:

Hi Howard

...

The SASL library tries all available information sources. If there was

a

...

"root" user record in your sasldb2 file it would have been used. Since your sasldblistusers2 output shows "root@tivo2" I'd say you have the wrong realm info in your database, as that doesn't match either "root" or "root@tivo2.backup".

And that was the problem. When I added "root@tivo2.backup" to the sasl database, ldapsearch worked! MANY thanks for this!

It's interesting (at least, to me) to note that I didn't need any of the authentication identity mapping entries (as described in section 11.2.4 of the "OpenLDAP Software 2.3 Administrator's Guide" to make this work (not even the "password-hash {cleartext}" entry that some resources said to add).

Those config items are only needed if you intend to use entries in LDAP for the SASL authentication info, instead of sasldb. Generally, that is the best thing to do.

So what gives this SASL mechanism the authority to perform tasks via LDAP?

Authentication and authorization are two separate things. When you configure your server to support SASL, that means you want to trust SASL to authenticate users. Regardless of authentication mechanism, ACLs are used to grant authority to particular users to perform various tasks.

Thanks! tl

lemons_terry@emc.com wrote:

Thanks, Howard; I think I'm beginning to understand this.

So, the AUTHENTICATION piece is done by SASL using digest_md5, an 'external' connection to TLS, etc. But the AUTHORIZATION piece is handled by the rules defined in the access control policy section of slapd.conf, right?

Yes, basic principles of computer security. Authentication (who are you?) is distinct from Authorization (what are you allowed to do?).

Thanks tl