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Description of problem:

When there are multiple realms in a keytab, sssd uses the first key available
to authenticate not looking at the key's realm. What sssd should do is
look for the first available key that has a valid realm to do the
authentication.

Version-Release number of selected component (if applicable):

sssd-1.8.0-11.el6

How reproducible:
On the client generate a keytab will multiple realms with
the valid realm defined last:

klist -k
Keytab name: WRFILE:/etc/krb5.keytab
KVNO Principal
---- --------------------------------------------------------------------------
   2 nfs/rhel6.boston.devel.redhat.com.COM
   1 host/rhel6.boston.devel.redhat.com.REDHAT.COM
  
Steps to Reproduce:
1. Log into the client
2.
3.
  
Actual results:
Fails

Expected results:
works.

Additional info:

Upstream ticket:
https://fedorahosted.org/sssd/ticket/1269

    Technical note added. If any revisions are required, please edit the "Technical Notes" field
    accordingly. All revisions will be proofread by the Engineering Content Services team.
    
    New Contents:
No documentation needed

Verified in version:

# rpm -qi sssd | head
Name        : sssd                         Relocations: (not relocatable)
Version     : 1.8.0                             Vendor: Red Hat, Inc.
Release     : 22.el6                        Build Date: Mon 09 Apr 2012 07:40:33 PM IST
Install Date: Fri 13 Apr 2012 09:34:35 PM IST      Build Host: x86-003.build.bos.redhat.com
Group       : Applications/System           Source RPM: sssd-1.8.0-22.el6.src.rpm
Size        : 7870660                          License: GPLv3+
Signature   : (none)
Packager    : Red Hat, Inc. <http://bugzilla.redhat.com/bugzilla>
URL         : http://fedorahosted.org/sssd/
Summary     : System Security Services Daemon

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHBA-2012-0747.html