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authz-regexp behavior with GSSAPI




Good day,

I am trying to figure out different behaviors with authz-regexp in slapd.conf.  

openldap 2.4-39
RHEL 6.5
cyrus-sasl and cyrus-sasl-gssapi 2.1.23-15
krb5-libs   1.10.3-42

We're mapping based on a search for the presence of the userPassword attribute.

In production is:

sasl-host pennid.upenn.edu
sasl-realm  UPENN.EDU
authz-regexp uid=(.*),cn=UPENN.EDU,cn=gssapi,cn=auth
        ldap:///ou=entities,dc=upenn,dc=edu??one?(userPassword={SASL}$1@UPENN.EDU)

and the authentication mapping works as desired;  the user@realm gets mapped to the just the username and the search succeeds:

 ldapwhoami -Y GSSAPI -U netmon -H ldaps://pennid.upenn.edu
SASL/GSSAPI authentication started
SASL username: netmon@UPENN.EDU
SASL SSF: 56
SASL data security layer installed.
dn:uid=netmon,ou=entities,dc=upenn,dc=edu

However, on development in a different kerberos realm, that statement will not map properly.  The mapping doesn't take place, so user@realm is used for the (unsuccessful) search:

sasl-host pennid-dev.net.isc.upenn.edu
sasl-realm TEST.NET.ISC.UPENN.EDU
authz-regexp  uid=(.*),cn=TEST.NET.ISC.UPENN.EDU,cn=gssapi,cn=auth
          ldap:///ou=entities,dc=upenn,dc=edu??one?(userPassword={SASL}$1@TEST.NET.ISC.UPENN.EDU)

no mapping takes place:

ldapwhoami -Y GSSAPI -U netmon -H ldaps://pennid-dev.net.isc.upenn.edu 
SASL/GSSAPI authentication started
SASL username: netmon@TEST.NET.ISC.UPENN.EDU
SASL SSF: 56
SASL data security layer installed.
dn:uid=netmon@test.net.isc.upenn.edu,cn=test.net.isc.upenn.edu,cn=gssapi,cn=auth

However, a change to the regexp on the development system will cause mapping to work there:

authz-regexp  uid=(.*)@TEST.NET.ISC.UPENN.EDU,cn=TEST.NET.ISC.UPENN.EDU,cn=gssapi,cn=auth
          ldap:///ou=entities,dc=upenn,dc=edu??one?(userPassword={SASL}$1@TEST.NET.ISC.UPENN.EDU)

$ ldapwhoami -Y GSSAPI -U netmon -H ldaps://pennid-dev.net.isc.upenn.edu 
SASL/GSSAPI authentication started
SASL username: netmon@TEST.NET.ISC.UPENN.EDU
SASL SSF: 56
SASL data security layer installed.
dn:uid=netmon,ou=entities,dc=upenn,dc=edu

But a similar regexp in production will not map properly:

authz-regexp uid=(.*)@UPENN.EDU,cn=UPENN.EDU,cn=gssapi,cn=auth
        ldap:///ou=entities,dc=upenn,dc=edu??one?(userPassword={SASL}$1@UPENN.EDU)

ldapwhoami -Y GSSAPI -U netmon -H ldaps://pennid.upenn.edu
SASL/GSSAPI authentication started
SASL username: netmon@UPENN.EDU
SASL SSF: 56
SASL data security layer installed.
dn:uid=netmon,cn=upenn.edu,cn=gssapi,cn=auth

Can anyone shed light on the different behavior?
-   only the authz-regexp has been modified
-   slapd was restarted after the changes.

Thanks,

Peter