Add audit and apply methods for 8.1.1.4

bin/hardening/8.1.1.4_set_failure_mode.sh

@@ -0,0 +1,76 @@
+#!/bin/bash
+
+#
+# harbian audit 9  Hardening
+#
+
+#
+# 8.1.1.4 Set failure mode of audit service (Scored)
+# Authors : Samson wen, Samson <sccxboy@gmail.com>
+#
+
+set -e # One error, it's over
+set -u # One variable unset, it's over
+
+HARDENING_LEVEL=4
+
+FILE='/etc/audit/rules.d/audit.rules'
+PATTERN='failure'
+SETVALUE=2
+
+# This function will be called if the script status is on enabled / audit mode
+audit () {
+    does_file_exist $FILE
+    if [ $FNRET != 0 ]; then
+        crit "$FILE does not exist"
+        FNRET=1
+    else
+        ok "$FILE exists, checking configuration"
+        VALUE=$(auditctl -s | grep failure | awk '{print $2}')
+        if [ $VALUE -ge 1 -a $VALUE -le 2 ]; then
+            ok "$PATTERN value is ok in $FILE"
+            FNRET=0
+        else
+            crit "$PATTERN value is incorrect in $FILE"
+            FNRET=2
+        fi
+    fi
+}
+
+# This function will be called if the script status is on enabled mode
+apply () {
+    if [ $FNRET = 0 ]; then
+        ok "$PATTERN is present in $FILE"
+    elif [ $FNRET = 1 ]; then
+        warn "$FILE does not exist, creating it"
+        touch $FILE
+        LINENUM=$(grep '^[^#]' $FILE -n | awk -F: 'NR==1{print $1}')
+        sed -i "${LINENUM}a -f $SETVALUE" $FILE
+    elif [ $FNRET = 2 ]; then
+        warn "$PATTERN value is incorrect in $FILE, reset it"
+        replace_in_file $FILE "^-f[[:space:]]*.*" "-f $SETVALUE"
+    fi
+}
+
+# This function will check config parameters required
+check_config() {
+    :
+}
+
+# Source Root Dir Parameter
+if [ -r /etc/default/cis-hardening ]; then
+    . /etc/default/cis-hardening
+fi
+if [ -z "$CIS_ROOT_DIR" ]; then
+     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    exit 128
+fi
+
+# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
+if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+    . $CIS_ROOT_DIR/lib/main.sh
+else
+    echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
+    exit 128
+fi