Enforce password security through pam
Add suitable pam modules in place which will enforce
password security
1. pam_cracklib is added with minimum length of 8. Length
greater than 8 can be configured through D-Bus interface.
2. pam_pwhistory is added to remember old password. Disabled
by default. Can be enabled through D-Bus interface
3. pam-tally2 used to lock out account after failed attempts.
Disabled by deault. Can be enabled through D-Bus interface
Note: pam_cracklib will do password verification one extra time,
hence with this fix, any password change will request,
Retype new password for 2 times.
Change-Id: I3deb2f9b729fff1f44f0e7df517a6cf04b1d2bfd
Signed-off-by: Richard Marian Thomaiyar <richard.marian.thomaiyar@linux.intel.com>
diff --git a/recipes-core/pam/libpam/pam.d/common-account b/recipes-core/pam/libpam/pam.d/common-account
new file mode 100644
index 0000000..10cfc73
--- /dev/null
+++ b/recipes-core/pam/libpam/pam.d/common-account
@@ -0,0 +1,26 @@
+#
+# /etc/pam.d/common-account - authorization settings common to all services
+#
+# This file is included from other service-specific PAM config files,
+# and should contain a list of the authorization modules that define
+# the central access policy for use on the system. The default is to
+# only deny service to users whose accounts are expired in /etc/shadow.
+#
+# As of pam 1.0.1-6, this file is managed by pam-auth-update by default.
+# To take advantage of this, it is recommended that you configure any
+# local modules either before or after the default block, and use
+# pam-auth-update to manage selection of other modules. See
+# pam-auth-update(8) for details.
+#
+
+# here are the per-package modules (the "Primary" block)
+account [success=1 new_authtok_reqd=done default=ignore] pam_unix.so
+# here's the fallback if no module succeeds
+account requisite pam_deny.so
+account required pam_tally2.so
+# prime the stack with a positive return value if there isn't one already;
+# this avoids us returning an error just because nothing sets a success code
+# since the modules above will each just jump around
+account required pam_permit.so
+# and here are more per-package modules (the "Additional" block)
+# end of pam-auth-update config