Improve password rules for local accounts

debian/postinst

@@ -3,6 +3,14 @@
 
 set -e
 
+CONF_FILE="/etc/security/pwquality.conf"
+
+yd_update_keyval() { # file key value...
+    local file="$1" key="$2" ; shift 2
+    # delete line starting with key then append to the end
+    sed -e "/^[ \t]*$key[ \t]\=/d" -e "\$a$key = $*" -i "$file"
+}
+
 case "$1" in
     configure)
         # Enable GDM customization
@@ -57,6 +65,21 @@ case "$1" in
     ;;
 esac
 
+# Min size of password
+yd_update_keyval "$CONF_FILE" "minlen" "12"
+
+# Lowercase char (-1 => min 1 char)
+yd_update_keyval "$CONF_FILE" "lcredit" "-1" 
+
+# Uppercase char (-1 => min 1 char)
+yd_update_keyval "$CONF_FILE" "ucredit" "-1"
+
+# Decimal char (-1 => min 1 char)
+yd_update_keyval "$CONF_FILE" "dcredit" "-1"
+
+# Other char (-1 => min 1 char)
+yd_update_keyval "$CONF_FILE" "ocredit" "-1"
+
 # dh_installdeb will replace this with shell code automatically
 # generated by other debhelper scripts.