pam_ksu8
Kerberos 5 su pam module
Usage
[service-name] module-type control-flag pam_ksu [options]
Overview
The Kerberos 5 SU authentication service module for PAM, pam_ksu for only one PAM category: authentication. In terms of the module-type parameter, this is the “auth” feature. The module is specifically designed to be used with the su(1) utility.
Kerberos 5 SU Authentication Module
The Kerberos 5 SU authentication component provides functions to verify the identity of a user (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 “root”, then the Kerberos 5 principal used for authentication and authorization will be the “root” instance of the current user, e.g. “user/[email protected]”. Otherwise, the principal will simply be the current user's default principal, e.g. “[email protected]”.
The user is prompted for a password if necessary. Authorization is performed by comparing the Kerberos 5 principal with those listed in the .k5login file in the target account's home directory (e.g. /root/.k5login for root).
The following options may be passed to the authentication module:
debug-
syslog(3) debugging information at LOG_DEBUG level.
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.
try_first_pass-
This option is similar to the
use_first_passoption, except that if the previously obtained password fails, the user is prompted for another password.
Releases
52 releases since FreeBSD 5.3-RELEASE; the text changed 34 times.