shadow: pam config for login to use pam_selinux module

login should use pam_selinux module to label security contexts of
processes while login into system.

Signed-off-by: Xin Ouyang <Xin.Ouyang@windriver.com>

2 files changed, 101 insertions, 1 deletions

diff --git a/recipes-extended/shadow/files/pam.d/login b/recipes-extended/shadow/files/pam.d/login
new file mode 100644
index 0000000..43c3654
--- /dev/null
+++ b/recipes-extended/shadow/files/pam.d/login
@@ -0,0 +1,98 @@
+#
+# The PAM configuration file for the Shadow `login' service
+#
+
+# Enforce a minimal delay in case of failure (in microseconds).
+# (Replaces the `FAIL_DELAY' setting from login.defs)
+# Note that other modules may require another minimal delay. (for example,
+# to disable any delay, you should add the nodelay option to pam_unix)
+auth       optional   pam_faildelay.so  delay=3000000
+
+# Outputs an issue file prior to each login prompt (Replaces the
+# ISSUE_FILE option from login.defs). Uncomment for use
+# auth       required   pam_issue.so issue=/etc/issue
+
+# Disallows root logins except on tty's listed in /etc/securetty
+# (Replaces the `CONSOLE' setting from login.defs)
+# Note that it is included as a "requisite" module. No password prompts will
+# be displayed if this module fails to avoid having the root password
+# transmitted on unsecure ttys.
+# You can change it to a "required" module if you think it permits to
+# guess valid user names of your system (invalid user names are considered
+# as possibly being root).
+auth       [success=ok ignore=ignore user_unknown=ignore default=die]  pam_securetty.so
+
+# Disallows other than root logins when /etc/nologin exists
+# (Replaces the `NOLOGINS_FILE' option from login.defs)
+auth       requisite  pam_nologin.so
+
+# SELinux needs to be the first session rule. This ensures that any 
+# lingering context has been cleared. Without out this it is possible 
+# that a module could execute code in the wrong domain.
+# When the module is present, "required" would be sufficient (When SELinux
+# is disabled, this returns success.)
+session [success=ok ignore=ignore module_unknown=ignore default=bad] pam_selinux.so close
+
+# This module parses environment configuration file(s)
+# and also allows you to use an extended config
+# file /etc/security/pam_env.conf.
+# 
+# parsing /etc/environment needs "readenv=1"
+session       required   pam_env.so readenv=1
+# locale variables are also kept into /etc/default/locale in etch
+# reading this file *in addition to /etc/environment* does not hurt
+session       required   pam_env.so readenv=1 envfile=/etc/default/locale
+
+# Standard Un*x authentication.
+auth       include      common-auth
+
+# This allows certain extra groups to be granted to a user
+# based on things like time of day, tty, service, and user.
+# Please edit /etc/security/group.conf to fit your needs
+# (Replaces the `CONSOLE_GROUPS' option in login.defs)
+auth       optional   pam_group.so
+
+# Uncomment and edit /etc/security/time.conf if you need to set
+# time restrainst on logins.
+# (Replaces the `PORTTIME_CHECKS_ENAB' option from login.defs
+# as well as /etc/porttime)
+# account    requisite  pam_time.so
+
+# Uncomment and edit /etc/security/access.conf if you need to
+# set access limits.
+# (Replaces /etc/login.access file)
+# account  required       pam_access.so
+
+# Sets up user limits according to /etc/security/limits.conf
+# (Replaces the use of /etc/limits in old login)
+session    required   pam_limits.so
+
+# Prints the last login info upon succesful login
+# (Replaces the `LASTLOG_ENAB' option from login.defs)
+session    optional   pam_lastlog.so
+
+# Prints the motd upon succesful login
+# (Replaces the `MOTD_FILE' option in login.defs)
+session    optional   pam_motd.so
+
+# Prints the status of the user's mailbox upon succesful login
+# (Replaces the `MAIL_CHECK_ENAB' option from login.defs). 
+#
+# This also defines the MAIL environment variable
+# However, userdel also needs MAIL_DIR and MAIL_FILE variables
+# in /etc/login.defs to make sure that removing a user 
+# also removes the user's mail spool file.
+# See comments in /etc/login.defs
+session    optional   pam_mail.so standard
+
+# Standard Un*x account and session
+account    include      common-account
+password   include      common-password
+session    include      common-session
+
+# SELinux needs to intervene at login time to ensure that the process
+# starts in the proper default security context. Only sessions which are
+# intended to run in the user's context should be run after this.
+session [success=ok ignore=ignore module_unknown=ignore default=bad] pam_selinux.so open select_context
+# When the module is present, "required" would be sufficient (When SELinux
+# is disabled, this returns success.)
diff --git a/recipes-extended/shadow/shadow_4.1.4.3.bbappend b/recipes-extended/shadow/shadow_4.1.4.3.bbappend
index 3976c93..97a806f 100644
--- a/recipes-extended/shadow/shadow_4.1.4.3.bbappend
+++ b/recipes-extended/shadow/shadow_4.1.4.3.bbappend
@@ -1,7 +1,9 @@
+FILESEXTRAPATHS_prepend := "${THISDIR}/files:"
+
 DEPENDS += "${@base_contains('DISTRO_FEATURES', 'selinux', 'libselinux audit', '', d)}"
 
 EXTRA_OECONF += "${@base_contains('DISTRO_FEATURES', 'selinux', '--with-selinux', '--without-selinux', d)}"
 EXTRA_OECONF += "${@base_contains('DISTRO_FEATURES', 'selinux', '--with-audit', '--without-audit', d)}"
 
-PR .= ".1"
+PR .= ".2"