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Copyright (c) 2001 Networks Associates Technology, Inc.
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This software was developed for the FreeBSD Project by ThinkSec AS and
NAI Labs, the Security Research Division of Network Associates, Inc.
under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
DARPA CHATS research program.
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$FreeBSD: releng/11.0/lib/libpam/modules/pam_ksu/pam_ksu.8 107771 2002-12-12 08:19:47Z ru $
.Dd May 15, 2002 .Dt PAM_KSU 8 .Os .Sh NAME .Nm pam_ksu .Nd Kerberos 5 SU PAM module .Sh SYNOPSIS .Op Ar service-name .Ar module-type .Ar control-flag
a pam_ksu
.Op Ar options
.Sh DESCRIPTION
The Kerberos 5 SU authentication service module for PAM,
.Nm
for only one PAM category: authentication.
In terms of the
.Ar module-type
parameter, this is the
.Dq Li auth
feature.
The module is specifically designed to be used with the
.Xr su 1
utility.
It also provides a null function for session management.
.Ss Kerberos 5 SU Authentication Module
The Kerberos 5 SU authentication component provides functions to verify
the identity of a user
q Fn pam_sm_authenticate , and determine whether or not the user is authorized to obtain the privileges of the target account. If the target account is .Dq root , then the Kerberos 5 principal used for authentication and authorization will be the .Dq root instance of the current user, e.g.\& .Dq Li user/root@REAL.M . Otherwise, the principal will simply be the current user's default principal, e.g.\& .Dq Li user@REAL.M .
p The user is prompted for a password if necessary. Authorization is performed by comparing the Kerberos 5 principal with those listed in the
a .k5login file in the target account's home directory (e.g.\&
a /root/.k5login for root).
p The following options may be passed to the authentication module: l -tag -width ".Cm use_first_pass" t Cm debug .Xr syslog 3 debugging information at .Dv LOG_DEBUG level. t Cm use_first_pass If the authentication module is not the first in the stack, and a previous module obtained the user's password, that password is used to authenticate the user. If this fails, the authentication module returns failure without prompting the user for a password. This option has no effect if the authentication module is the first in the stack, or if no previous modules obtained the user's password. t Cm try_first_pass This option is similar to the .Cm use_first_pass option, except that if the previously obtained password fails, the user is prompted for another password. .El .Sh SEE ALSO .Xr su 1 , .Xr syslog 3 , .Xr pam.conf 5 , .Xr pam 8