August 2003
Intermediate to advanced
270 pages
10h 9m
English
Content preview from Kerberos: The Definitive GuideBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Mac OS X and the Login Window
The initial console login window presented to Mac OS X users is called, appropriately enough, the loginwindow. Unfortunately, loginwindow’s PAM support is incomplete. But luckily for Kerberos 5 users, Apple has provided special support in the loginwindow contained in Mac OS X 10.2 and above to provide users with Kerberos tickets when logging into their OS X system.
The procedure for enabling Kerberos support in the Mac OS X loginwindow application is documented in the AppleCare document #107154, “Mac OS X 10.2: How to Enable Kerberos Authentication for Login Window.” Note that the method to enable this facility is subject to change in future OS X revisions.
Just like PAM, there are two basic options available when enabling Kerberos login support in OS X. You can either require valid Kerberos credentials for successful local login, or simply acquire Kerberos tickets if the local password is the same as the Kerberos password.
The Mac OS X Security and Authorization Services use the
/etc/authorization file, and this is the file that
we’ll use to enable Kerberos authentication in loginwindow. First, to require valid Kerberos
credentials for login to the local system, Mac OS X can either require a
valid host keytab or operate without a host keytab. Note that as we
discussed in Chapter 6, a
host keytab is required to defend against
man-in-the-middle attacks against the Kerberos system.
Tip
Since Mac OS X does not include the kadmin utility, the best way to get ...
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