1 .\" $NetBSD: pam_ksu.8,v 1.3 2005/02/26 15:04:09 thorpej Exp $
2 .\" Copyright (c) 2001 Mark R V Murray
3 .\" All rights reserved.
4 .\" Copyright (c) 2001 Networks Associates Technology, Inc.
5 .\" All rights reserved.
7 .\" This software was developed for the FreeBSD Project by ThinkSec AS and
8 .\" NAI Labs, the Security Research Division of Network Associates, Inc.
9 .\" under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
10 .\" DARPA CHATS research program.
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36 .\" $FreeBSD: src/lib/libpam/modules/pam_ksu/pam_ksu.8,v 1.3 2002/12/12 08:19:47 ru Exp $
43 .Nd Kerberos 5 SU PAM module
51 The Kerberos 5 SU authentication service module for PAM
52 provides functionality for only one PAM category: authentication.
55 parameter, this is the
58 The module is specifically designed to be used with the
61 .\" It also provides a null function for session management.
62 .Ss Kerberos 5 SU Authentication Module
63 The Kerberos 5 SU authentication component provides functions to verify
64 the identity of a user
65 .Pq Fn pam_sm_authenticate ,
66 and determine whether or not the user is authorized to obtain the
67 privileges of the target account.
68 If the target account is
70 then the Kerberos 5 principal used
71 for authentication and authorization will be the
74 the current user, e.g.\&
75 .Dq Li user/root@REAL.M .
76 Otherwise, the principal will simply be the current user's default
80 The user is prompted for a password if necessary.
81 Authorization is performed
82 by comparing the Kerberos 5 principal with those listed in the
84 file in the target account's home directory
89 The following options may be passed to the authentication module:
90 .Bl -tag -width ".Cm use_first_pass"
93 debugging information at
97 If the authentication module
98 is not the first in the stack,
100 obtained the user's password,
101 that password is used
102 to authenticate the user.
104 the authentication module returns failure
105 without prompting the user for a password.
106 This option has no effect
107 if the authentication module
108 is the first in the stack,
109 or if no previous modules
110 obtained the user's password.
111 .It Cm try_first_pass
112 This option is similar to the
115 except that if the previously obtained password fails,
116 the user is prompted for another password.