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pam_selinux — PAM module to set the default security context

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DESCRIPTION

In a nutshell, pam_selinux sets up the default security context for the next
execed shell.

When an application opens a session using pam_selinux, the shell that gets
executed will be run in the default security context, or if the user chooses
and the pam file allows the selected security context. Also the controlling tty
will have it's security context modified to match the users.

Adding pam_selinux into a pam file could cause other pam modules to change
their behavior if the exec another application. The close and open option help
mitigate this problem. close option will only cause the close portion of the
pam_selinux to execute, and open will only cause the open portion to run. You
can add pam_selinux to the config file twice. Add the pam_selinux close as the
executes the open pass through the modules, pam_selinux open_session will
happen last. When PAM executes the close pass through the modules pam_selinux
close_session will happen first.

OPTIONS

close

    Only execute the close_session portion of the module.

debug

    Turns on debugging via syslog(3).

open

    Only execute the open_session portion of the module.

nottys

    Do not try to setup the ttys security context.

verbose

    attempt to inform the user when security context is set.

select_context

    Attempt to ask the user for a custom security context role. If MLS is on
    ask also for sensitivity level.

env_params

    Attempt to obtain a custom security context role from PAM environment. If
    MLS is on obtain also sensitivity level. This option and the select_context
    option are mutually exclusive. The respective PAM environment variables are
    SELINUX_ROLE_REQUESTED, SELINUX_LEVEL_REQUESTED, and
    SELINUX_USE_CURRENT_RANGE. The first two variables are self describing and
    the last one if set to 1 makes the PAM module behave as if the
    use_current_range was specified on the command line of the module.

use_current_range

    Use the sensitivity level of the current process for the user context
    instead of the default level. Also suppresses asking of the sensitivity
    level from the user or obtaining it from PAM environment.

EXAMPLES

auth     required  pam_unix.so
session  required  pam_permit.so
session  optional  pam_selinux.so


AUTHOR

pam_selinux was written by Dan Walsh <dwalsh@redhat.com>.

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